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update grpc packages

This commit is contained in:
James Bardin 2018-07-26 16:32:32 -04:00 committed by Martin Atkins
parent 8f51b2fba5
commit 6c01444a8a
86 changed files with 11785 additions and 6298 deletions
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6
vendor/google.golang.org/grpc/CONTRIBUTING.md generated vendored
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@ -7,7 +7,7 @@ If you are new to github, please start by reading [Pull Request howto](https://h
## Legal requirements
In order to protect both you and ourselves, you will need to sign the
[Contributor License Agreement](https://cla.developers.google.com/clas).
[Contributor License Agreement](https://identity.linuxfoundation.org/projects/cncf).
## Guidelines for Pull Requests
How to get your contributions merged smoothly and quickly.
@ -27,6 +27,10 @@ How to get your contributions merged smoothly and quickly.
- Keep your PR up to date with upstream/master (if there are merge conflicts, we can't really merge your change).
- **All tests need to be passing** before your change can be merged. We recommend you **run tests locally** before creating your PR to catch breakages early on.
- `make all` to test everything, OR
- `make vet` to catch vet errors
- `make test` to run the tests
- `make testrace` to run tests in race mode
- Exceptions to the rules can be made if there's a compelling reason for doing so.

29
vendor/google.golang.org/grpc/Makefile generated vendored
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@ -1,4 +1,4 @@
all: test testrace
all: vet test testrace
deps:
go get -d -v google.golang.org/grpc/...
@ -9,6 +9,9 @@ updatedeps:
testdeps:
go get -d -v -t google.golang.org/grpc/...
testgaedeps:
goapp get -d -v -t -tags 'appengine appenginevm' google.golang.org/grpc/...
updatetestdeps:
go get -d -v -t -u -f google.golang.org/grpc/...
@ -20,33 +23,33 @@ proto:
echo "error: protoc not installed" >&2; \
exit 1; \
fi
go get -u -v github.com/golang/protobuf/protoc-gen-go
# use $$dir as the root for all proto files in the same directory
for dir in $$(git ls-files '*.proto' | xargs -n1 dirname | uniq); do \
protoc -I $$dir --go_out=plugins=grpc:$$dir $$dir/*.proto; \
done
go generate google.golang.org/grpc/...
vet:
./vet.sh
test: testdeps
go test -v -cpu 1,4 google.golang.org/grpc/...
go test -cpu 1,4 -timeout 5m google.golang.org/grpc/...
testrace: testdeps
go test -v -race -cpu 1,4 google.golang.org/grpc/...
go test -race -cpu 1,4 -timeout 7m google.golang.org/grpc/...
testappengine: testgaedeps
goapp test -cpu 1,4 -timeout 5m google.golang.org/grpc/...
clean:
go clean -i google.golang.org/grpc/...
coverage: testdeps
./coverage.sh --coveralls
.PHONY: \
all \
deps \
updatedeps \
testdeps \
testgaedeps \
updatetestdeps \
build \
proto \
vet \
test \
testrace \
clean \
coverage
clean

6
vendor/google.golang.org/grpc/README.md generated vendored
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@ -1,6 +1,6 @@
# gRPC-Go
[![Build Status](https://travis-ci.org/grpc/grpc-go.svg)](https://travis-ci.org/grpc/grpc-go) [![GoDoc](https://godoc.org/google.golang.org/grpc?status.svg)](https://godoc.org/google.golang.org/grpc)
[![Build Status](https://travis-ci.org/grpc/grpc-go.svg)](https://travis-ci.org/grpc/grpc-go) [![GoDoc](https://godoc.org/google.golang.org/grpc?status.svg)](https://godoc.org/google.golang.org/grpc) [![GoReportCard](https://goreportcard.com/badge/grpc/grpc-go)](https://goreportcard.com/report/github.com/grpc/grpc-go)
The Go implementation of [gRPC](https://grpc.io/): A high performance, open source, general RPC framework that puts mobile and HTTP/2 first. For more information see the [gRPC Quick Start: Go](https://grpc.io/docs/quickstart/go.html) guide.
@ -10,13 +10,13 @@ Installation
To install this package, you need to install Go and setup your Go workspace on your computer. The simplest way to install the library is to run:
```
$ go get google.golang.org/grpc
$ go get -u google.golang.org/grpc
```
Prerequisites
-------------
This requires Go 1.6 or later.
This requires Go 1.6 or later. Go 1.7 will be required soon.
Constraints
-----------

70
vendor/google.golang.org/grpc/backoff.go generated vendored
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@ -16,83 +16,23 @@
*
*/
// See internal/backoff package for the backoff implementation. This file is
// kept for the exported types and API backward compatility.
package grpc
import (
"math/rand"
"time"
)
// DefaultBackoffConfig uses values specified for backoff in
// https://github.com/grpc/grpc/blob/master/doc/connection-backoff.md.
var (
DefaultBackoffConfig = BackoffConfig{
MaxDelay: 120 * time.Second,
baseDelay: 1.0 * time.Second,
factor: 1.6,
jitter: 0.2,
}
)
// backoffStrategy defines the methodology for backing off after a grpc
// connection failure.
//
// This is unexported until the gRPC project decides whether or not to allow
// alternative backoff strategies. Once a decision is made, this type and its
// method may be exported.
type backoffStrategy interface {
// backoff returns the amount of time to wait before the next retry given
// the number of consecutive failures.
backoff(retries int) time.Duration
var DefaultBackoffConfig = BackoffConfig{
MaxDelay: 120 * time.Second,
}
// BackoffConfig defines the parameters for the default gRPC backoff strategy.
type BackoffConfig struct {
// MaxDelay is the upper bound of backoff delay.
MaxDelay time.Duration
// TODO(stevvooe): The following fields are not exported, as allowing
// changes would violate the current gRPC specification for backoff. If
// gRPC decides to allow more interesting backoff strategies, these fields
// may be opened up in the future.
// baseDelay is the amount of time to wait before retrying after the first
// failure.
baseDelay time.Duration
// factor is applied to the backoff after each retry.
factor float64
// jitter provides a range to randomize backoff delays.
jitter float64
}
func setDefaults(bc *BackoffConfig) {
md := bc.MaxDelay
*bc = DefaultBackoffConfig
if md > 0 {
bc.MaxDelay = md
}
}
func (bc BackoffConfig) backoff(retries int) time.Duration {
if retries == 0 {
return bc.baseDelay
}
backoff, max := float64(bc.baseDelay), float64(bc.MaxDelay)
for backoff < max && retries > 0 {
backoff *= bc.factor
retries--
}
if backoff > max {
backoff = max
}
// Randomize backoff delays so that if a cluster of requests start at
// the same time, they won't operate in lockstep.
backoff *= 1 + bc.jitter*(rand.Float64()*2-1)
if backoff < 0 {
return 0
}
return time.Duration(backoff)
}

27
vendor/google.golang.org/grpc/balancer.go generated vendored
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@ -28,10 +28,12 @@ import (
"google.golang.org/grpc/credentials"
"google.golang.org/grpc/grpclog"
"google.golang.org/grpc/naming"
"google.golang.org/grpc/status"
)
// Address represents a server the client connects to.
// This is the EXPERIMENTAL API and may be changed or extended in the future.
//
// Deprecated: please use package balancer.
type Address struct {
// Addr is the server address on which a connection will be established.
Addr string
@ -41,6 +43,8 @@ type Address struct {
}
// BalancerConfig specifies the configurations for Balancer.
//
// Deprecated: please use package balancer.
type BalancerConfig struct {
// DialCreds is the transport credential the Balancer implementation can
// use to dial to a remote load balancer server. The Balancer implementations
@ -53,7 +57,8 @@ type BalancerConfig struct {
}
// BalancerGetOptions configures a Get call.
// This is the EXPERIMENTAL API and may be changed or extended in the future.
//
// Deprecated: please use package balancer.
type BalancerGetOptions struct {
// BlockingWait specifies whether Get should block when there is no
// connected address.
@ -61,7 +66,8 @@ type BalancerGetOptions struct {
}
// Balancer chooses network addresses for RPCs.
// This is the EXPERIMENTAL API and may be changed or extended in the future.
//
// Deprecated: please use package balancer.
type Balancer interface {
// Start does the initialization work to bootstrap a Balancer. For example,
// this function may start the name resolution and watch the updates. It will
@ -134,6 +140,8 @@ func downErrorf(timeout, temporary bool, format string, a ...interface{}) downEr
// RoundRobin returns a Balancer that selects addresses round-robin. It uses r to watch
// the name resolution updates and updates the addresses available correspondingly.
//
// Deprecated: please use package balancer/roundrobin.
func RoundRobin(r naming.Resolver) Balancer {
return &roundRobin{r: r}
}
@ -310,7 +318,7 @@ func (rr *roundRobin) Get(ctx context.Context, opts BalancerGetOptions) (addr Ad
if !opts.BlockingWait {
if len(rr.addrs) == 0 {
rr.mu.Unlock()
err = Errorf(codes.Unavailable, "there is no address available")
err = status.Errorf(codes.Unavailable, "there is no address available")
return
}
// Returns the next addr on rr.addrs for failfast RPCs.
@ -395,3 +403,14 @@ func (rr *roundRobin) Close() error {
}
return nil
}
// pickFirst is used to test multi-addresses in one addrConn in which all addresses share the same addrConn.
// It is a wrapper around roundRobin balancer. The logic of all methods works fine because balancer.Get()
// returns the only address Up by resetTransport().
type pickFirst struct {
*roundRobin
}
func pickFirstBalancerV1(r naming.Resolver) Balancer {
return &pickFirst{&roundRobin{r: r}}
}

274
vendor/google.golang.org/grpc/balancer/balancer.go generated vendored Normal file
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@ -0,0 +1,274 @@
/*
*
* Copyright 2017 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
// Package balancer defines APIs for load balancing in gRPC.
// All APIs in this package are experimental.
package balancer
import (
"errors"
"net"
"strings"
"golang.org/x/net/context"
"google.golang.org/grpc/connectivity"
"google.golang.org/grpc/credentials"
"google.golang.org/grpc/resolver"
)
var (
// m is a map from name to balancer builder.
m = make(map[string]Builder)
)
// Register registers the balancer builder to the balancer map. b.Name
// (lowercased) will be used as the name registered with this builder.
//
// NOTE: this function must only be called during initialization time (i.e. in
// an init() function), and is not thread-safe. If multiple Balancers are
// registered with the same name, the one registered last will take effect.
func Register(b Builder) {
m[strings.ToLower(b.Name())] = b
}
// Get returns the resolver builder registered with the given name.
// Note that the compare is done in a case-insenstive fashion.
// If no builder is register with the name, nil will be returned.
func Get(name string) Builder {
if b, ok := m[strings.ToLower(name)]; ok {
return b
}
return nil
}
// SubConn represents a gRPC sub connection.
// Each sub connection contains a list of addresses. gRPC will
// try to connect to them (in sequence), and stop trying the
// remainder once one connection is successful.
//
// The reconnect backoff will be applied on the list, not a single address.
// For example, try_on_all_addresses -> backoff -> try_on_all_addresses.
//
// All SubConns start in IDLE, and will not try to connect. To trigger
// the connecting, Balancers must call Connect.
// When the connection encounters an error, it will reconnect immediately.
// When the connection becomes IDLE, it will not reconnect unless Connect is
// called.
//
// This interface is to be implemented by gRPC. Users should not need a
// brand new implementation of this interface. For the situations like
// testing, the new implementation should embed this interface. This allows
// gRPC to add new methods to this interface.
type SubConn interface {
// UpdateAddresses updates the addresses used in this SubConn.
// gRPC checks if currently-connected address is still in the new list.
// If it's in the list, the connection will be kept.
// If it's not in the list, the connection will gracefully closed, and
// a new connection will be created.
//
// This will trigger a state transition for the SubConn.
UpdateAddresses([]resolver.Address)
// Connect starts the connecting for this SubConn.
Connect()
}
// NewSubConnOptions contains options to create new SubConn.
type NewSubConnOptions struct{}
// ClientConn represents a gRPC ClientConn.
//
// This interface is to be implemented by gRPC. Users should not need a
// brand new implementation of this interface. For the situations like
// testing, the new implementation should embed this interface. This allows
// gRPC to add new methods to this interface.
type ClientConn interface {
// NewSubConn is called by balancer to create a new SubConn.
// It doesn't block and wait for the connections to be established.
// Behaviors of the SubConn can be controlled by options.
NewSubConn([]resolver.Address, NewSubConnOptions) (SubConn, error)
// RemoveSubConn removes the SubConn from ClientConn.
// The SubConn will be shutdown.
RemoveSubConn(SubConn)
// UpdateBalancerState is called by balancer to nofity gRPC that some internal
// state in balancer has changed.
//
// gRPC will update the connectivity state of the ClientConn, and will call pick
// on the new picker to pick new SubConn.
UpdateBalancerState(s connectivity.State, p Picker)
// ResolveNow is called by balancer to notify gRPC to do a name resolving.
ResolveNow(resolver.ResolveNowOption)
// Target returns the dial target for this ClientConn.
Target() string
}
// BuildOptions contains additional information for Build.
type BuildOptions struct {
// DialCreds is the transport credential the Balancer implementation can
// use to dial to a remote load balancer server. The Balancer implementations
// can ignore this if it does not need to talk to another party securely.
DialCreds credentials.TransportCredentials
// Dialer is the custom dialer the Balancer implementation can use to dial
// to a remote load balancer server. The Balancer implementations
// can ignore this if it doesn't need to talk to remote balancer.
Dialer func(context.Context, string) (net.Conn, error)
// ChannelzParentID is the entity parent's channelz unique identification number.
ChannelzParentID int64
}
// Builder creates a balancer.
type Builder interface {
// Build creates a new balancer with the ClientConn.
Build(cc ClientConn, opts BuildOptions) Balancer
// Name returns the name of balancers built by this builder.
// It will be used to pick balancers (for example in service config).
Name() string
}
// PickOptions contains addition information for the Pick operation.
type PickOptions struct {
// FullMethodName is the method name that NewClientStream() is called
// with. The canonical format is /service/Method.
FullMethodName string
}
// DoneInfo contains additional information for done.
type DoneInfo struct {
// Err is the rpc error the RPC finished with. It could be nil.
Err error
// BytesSent indicates if any bytes have been sent to the server.
BytesSent bool
// BytesReceived indicates if any byte has been received from the server.
BytesReceived bool
}
var (
// ErrNoSubConnAvailable indicates no SubConn is available for pick().
// gRPC will block the RPC until a new picker is available via UpdateBalancerState().
ErrNoSubConnAvailable = errors.New("no SubConn is available")
// ErrTransientFailure indicates all SubConns are in TransientFailure.
// WaitForReady RPCs will block, non-WaitForReady RPCs will fail.
ErrTransientFailure = errors.New("all SubConns are in TransientFailure")
)
// Picker is used by gRPC to pick a SubConn to send an RPC.
// Balancer is expected to generate a new picker from its snapshot every time its
// internal state has changed.
//
// The pickers used by gRPC can be updated by ClientConn.UpdateBalancerState().
type Picker interface {
// Pick returns the SubConn to be used to send the RPC.
// The returned SubConn must be one returned by NewSubConn().
//
// This functions is expected to return:
// - a SubConn that is known to be READY;
// - ErrNoSubConnAvailable if no SubConn is available, but progress is being
// made (for example, some SubConn is in CONNECTING mode);
// - other errors if no active connecting is happening (for example, all SubConn
// are in TRANSIENT_FAILURE mode).
//
// If a SubConn is returned:
// - If it is READY, gRPC will send the RPC on it;
// - If it is not ready, or becomes not ready after it's returned, gRPC will block
// until UpdateBalancerState() is called and will call pick on the new picker.
//
// If the returned error is not nil:
// - If the error is ErrNoSubConnAvailable, gRPC will block until UpdateBalancerState()
// - If the error is ErrTransientFailure:
// - If the RPC is wait-for-ready, gRPC will block until UpdateBalancerState()
// is called to pick again;
// - Otherwise, RPC will fail with unavailable error.
// - Else (error is other non-nil error):
// - The RPC will fail with unavailable error.
//
// The returned done() function will be called once the rpc has finished, with the
// final status of that RPC.
// done may be nil if balancer doesn't care about the RPC status.
Pick(ctx context.Context, opts PickOptions) (conn SubConn, done func(DoneInfo), err error)
}
// Balancer takes input from gRPC, manages SubConns, and collects and aggregates
// the connectivity states.
//
// It also generates and updates the Picker used by gRPC to pick SubConns for RPCs.
//
// HandleSubConnectionStateChange, HandleResolvedAddrs and Close are guaranteed
// to be called synchronously from the same goroutine.
// There's no guarantee on picker.Pick, it may be called anytime.
type Balancer interface {
// HandleSubConnStateChange is called by gRPC when the connectivity state
// of sc has changed.
// Balancer is expected to aggregate all the state of SubConn and report
// that back to gRPC.
// Balancer should also generate and update Pickers when its internal state has
// been changed by the new state.
HandleSubConnStateChange(sc SubConn, state connectivity.State)
// HandleResolvedAddrs is called by gRPC to send updated resolved addresses to
// balancers.
// Balancer can create new SubConn or remove SubConn with the addresses.
// An empty address slice and a non-nil error will be passed if the resolver returns
// non-nil error to gRPC.
HandleResolvedAddrs([]resolver.Address, error)
// Close closes the balancer. The balancer is not required to call
// ClientConn.RemoveSubConn for its existing SubConns.
Close()
}
// ConnectivityStateEvaluator takes the connectivity states of multiple SubConns
// and returns one aggregated connectivity state.
//
// It's not thread safe.
type ConnectivityStateEvaluator struct {
numReady uint64 // Number of addrConns in ready state.
numConnecting uint64 // Number of addrConns in connecting state.
numTransientFailure uint64 // Number of addrConns in transientFailure.
}
// RecordTransition records state change happening in subConn and based on that
// it evaluates what aggregated state should be.
//
// - If at least one SubConn in Ready, the aggregated state is Ready;
// - Else if at least one SubConn in Connecting, the aggregated state is Connecting;
// - Else the aggregated state is TransientFailure.
//
// Idle and Shutdown are not considered.
func (cse *ConnectivityStateEvaluator) RecordTransition(oldState, newState connectivity.State) connectivity.State {
// Update counters.
for idx, state := range []connectivity.State{oldState, newState} {
updateVal := 2*uint64(idx) - 1 // -1 for oldState and +1 for new.
switch state {
case connectivity.Ready:
cse.numReady += updateVal
case connectivity.Connecting:
cse.numConnecting += updateVal
case connectivity.TransientFailure:
cse.numTransientFailure += updateVal
}
}
// Evaluate.
if cse.numReady > 0 {
return connectivity.Ready
}
if cse.numConnecting > 0 {
return connectivity.Connecting
}
return connectivity.TransientFailure
}

208
vendor/google.golang.org/grpc/balancer/base/balancer.go generated vendored Normal file
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@ -0,0 +1,208 @@
/*
*
* Copyright 2017 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package base
import (
"golang.org/x/net/context"
"google.golang.org/grpc/balancer"
"google.golang.org/grpc/connectivity"
"google.golang.org/grpc/grpclog"
"google.golang.org/grpc/resolver"
)
type baseBuilder struct {
name string
pickerBuilder PickerBuilder
}
func (bb *baseBuilder) Build(cc balancer.ClientConn, opt balancer.BuildOptions) balancer.Balancer {
return &baseBalancer{
cc: cc,
pickerBuilder: bb.pickerBuilder,
subConns: make(map[resolver.Address]balancer.SubConn),
scStates: make(map[balancer.SubConn]connectivity.State),
csEvltr: &connectivityStateEvaluator{},
// Initialize picker to a picker that always return
// ErrNoSubConnAvailable, because when state of a SubConn changes, we
// may call UpdateBalancerState with this picker.
picker: NewErrPicker(balancer.ErrNoSubConnAvailable),
}
}
func (bb *baseBuilder) Name() string {
return bb.name
}
type baseBalancer struct {
cc balancer.ClientConn
pickerBuilder PickerBuilder
csEvltr *connectivityStateEvaluator
state connectivity.State
subConns map[resolver.Address]balancer.SubConn
scStates map[balancer.SubConn]connectivity.State
picker balancer.Picker
}
func (b *baseBalancer) HandleResolvedAddrs(addrs []resolver.Address, err error) {
if err != nil {
grpclog.Infof("base.baseBalancer: HandleResolvedAddrs called with error %v", err)
return
}
grpclog.Infoln("base.baseBalancer: got new resolved addresses: ", addrs)
// addrsSet is the set converted from addrs, it's used for quick lookup of an address.
addrsSet := make(map[resolver.Address]struct{})
for _, a := range addrs {
addrsSet[a] = struct{}{}
if _, ok := b.subConns[a]; !ok {
// a is a new address (not existing in b.subConns).
sc, err := b.cc.NewSubConn([]resolver.Address{a}, balancer.NewSubConnOptions{})
if err != nil {
grpclog.Warningf("base.baseBalancer: failed to create new SubConn: %v", err)
continue
}
b.subConns[a] = sc
b.scStates[sc] = connectivity.Idle
sc.Connect()
}
}
for a, sc := range b.subConns {
// a was removed by resolver.
if _, ok := addrsSet[a]; !ok {
b.cc.RemoveSubConn(sc)
delete(b.subConns, a)
// Keep the state of this sc in b.scStates until sc's state becomes Shutdown.
// The entry will be deleted in HandleSubConnStateChange.
}
}
}
// regeneratePicker takes a snapshot of the balancer, and generates a picker
// from it. The picker is
// - errPicker with ErrTransientFailure if the balancer is in TransientFailure,
// - built by the pickerBuilder with all READY SubConns otherwise.
func (b *baseBalancer) regeneratePicker() {
if b.state == connectivity.TransientFailure {
b.picker = NewErrPicker(balancer.ErrTransientFailure)
return
}
readySCs := make(map[resolver.Address]balancer.SubConn)
// Filter out all ready SCs from full subConn map.
for addr, sc := range b.subConns {
if st, ok := b.scStates[sc]; ok && st == connectivity.Ready {
readySCs[addr] = sc
}
}
b.picker = b.pickerBuilder.Build(readySCs)
}
func (b *baseBalancer) HandleSubConnStateChange(sc balancer.SubConn, s connectivity.State) {
grpclog.Infof("base.baseBalancer: handle SubConn state change: %p, %v", sc, s)
oldS, ok := b.scStates[sc]
if !ok {
grpclog.Infof("base.baseBalancer: got state changes for an unknown SubConn: %p, %v", sc, s)
return
}
b.scStates[sc] = s
switch s {
case connectivity.Idle:
sc.Connect()
case connectivity.Shutdown:
// When an address was removed by resolver, b called RemoveSubConn but
// kept the sc's state in scStates. Remove state for this sc here.
delete(b.scStates, sc)
}
oldAggrState := b.state
b.state = b.csEvltr.recordTransition(oldS, s)
// Regenerate picker when one of the following happens:
// - this sc became ready from not-ready
// - this sc became not-ready from ready
// - the aggregated state of balancer became TransientFailure from non-TransientFailure
// - the aggregated state of balancer became non-TransientFailure from TransientFailure
if (s == connectivity.Ready) != (oldS == connectivity.Ready) ||
(b.state == connectivity.TransientFailure) != (oldAggrState == connectivity.TransientFailure) {
b.regeneratePicker()
}
b.cc.UpdateBalancerState(b.state, b.picker)
}
// Close is a nop because base balancer doesn't have internal state to clean up,
// and it doesn't need to call RemoveSubConn for the SubConns.
func (b *baseBalancer) Close() {
}
// NewErrPicker returns a picker that always returns err on Pick().
func NewErrPicker(err error) balancer.Picker {
return &errPicker{err: err}
}
type errPicker struct {
err error // Pick() always returns this err.
}
func (p *errPicker) Pick(ctx context.Context, opts balancer.PickOptions) (balancer.SubConn, func(balancer.DoneInfo), error) {
return nil, nil, p.err
}
// connectivityStateEvaluator gets updated by addrConns when their
// states transition, based on which it evaluates the state of
// ClientConn.
type connectivityStateEvaluator struct {
numReady uint64 // Number of addrConns in ready state.
numConnecting uint64 // Number of addrConns in connecting state.
numTransientFailure uint64 // Number of addrConns in transientFailure.
}
// recordTransition records state change happening in every subConn and based on
// that it evaluates what aggregated state should be.
// It can only transition between Ready, Connecting and TransientFailure. Other states,
// Idle and Shutdown are transitioned into by ClientConn; in the beginning of the connection
// before any subConn is created ClientConn is in idle state. In the end when ClientConn
// closes it is in Shutdown state.
//
// recordTransition should only be called synchronously from the same goroutine.
func (cse *connectivityStateEvaluator) recordTransition(oldState, newState connectivity.State) connectivity.State {
// Update counters.
for idx, state := range []connectivity.State{oldState, newState} {
updateVal := 2*uint64(idx) - 1 // -1 for oldState and +1 for new.
switch state {
case connectivity.Ready:
cse.numReady += updateVal
case connectivity.Connecting:
cse.numConnecting += updateVal
case connectivity.TransientFailure:
cse.numTransientFailure += updateVal
}
}
// Evaluate.
if cse.numReady > 0 {
return connectivity.Ready
}
if cse.numConnecting > 0 {
return connectivity.Connecting
}
return connectivity.TransientFailure
}

52
vendor/google.golang.org/grpc/balancer/base/base.go generated vendored Normal file
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/*
*
* Copyright 2017 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
// Package base defines a balancer base that can be used to build balancers with
// different picking algorithms.
//
// The base balancer creates a new SubConn for each resolved address. The
// provided picker will only be notified about READY SubConns.
//
// This package is the base of round_robin balancer, its purpose is to be used
// to build round_robin like balancers with complex picking algorithms.
// Balancers with more complicated logic should try to implement a balancer
// builder from scratch.
//
// All APIs in this package are experimental.
package base
import (
"google.golang.org/grpc/balancer"
"google.golang.org/grpc/resolver"
)
// PickerBuilder creates balancer.Picker.
type PickerBuilder interface {
// Build takes a slice of ready SubConns, and returns a picker that will be
// used by gRPC to pick a SubConn.
Build(readySCs map[resolver.Address]balancer.SubConn) balancer.Picker
}
// NewBalancerBuilder returns a balancer builder. The balancers
// built by this builder will use the picker builder to build pickers.
func NewBalancerBuilder(name string, pb PickerBuilder) balancer.Builder {
return &baseBuilder{
name: name,
pickerBuilder: pb,
}
}

79
vendor/google.golang.org/grpc/balancer/roundrobin/roundrobin.go generated vendored Normal file
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/*
*
* Copyright 2017 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
// Package roundrobin defines a roundrobin balancer. Roundrobin balancer is
// installed as one of the default balancers in gRPC, users don't need to
// explicitly install this balancer.
package roundrobin
import (
"sync"
"golang.org/x/net/context"
"google.golang.org/grpc/balancer"
"google.golang.org/grpc/balancer/base"
"google.golang.org/grpc/grpclog"
"google.golang.org/grpc/resolver"
)
// Name is the name of round_robin balancer.
const Name = "round_robin"
// newBuilder creates a new roundrobin balancer builder.
func newBuilder() balancer.Builder {
return base.NewBalancerBuilder(Name, &rrPickerBuilder{})
}
func init() {
balancer.Register(newBuilder())
}
type rrPickerBuilder struct{}
func (*rrPickerBuilder) Build(readySCs map[resolver.Address]balancer.SubConn) balancer.Picker {
grpclog.Infof("roundrobinPicker: newPicker called with readySCs: %v", readySCs)
var scs []balancer.SubConn
for _, sc := range readySCs {
scs = append(scs, sc)
}
return &rrPicker{
subConns: scs,
}
}
type rrPicker struct {
// subConns is the snapshot of the roundrobin balancer when this picker was
// created. The slice is immutable. Each Get() will do a round robin
// selection from it and return the selected SubConn.
subConns []balancer.SubConn
mu sync.Mutex
next int
}
func (p *rrPicker) Pick(ctx context.Context, opts balancer.PickOptions) (balancer.SubConn, func(balancer.DoneInfo), error) {
if len(p.subConns) <= 0 {
return nil, nil, balancer.ErrNoSubConnAvailable
}
p.mu.Lock()
sc := p.subConns[p.next]
p.next = (p.next + 1) % len(p.subConns)
p.mu.Unlock()
return sc, nil, nil
}

300
vendor/google.golang.org/grpc/balancer_conn_wrappers.go generated vendored Normal file
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/*
*
* Copyright 2017 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package grpc
import (
"fmt"
"sync"
"google.golang.org/grpc/balancer"
"google.golang.org/grpc/connectivity"
"google.golang.org/grpc/grpclog"
"google.golang.org/grpc/resolver"
)
// scStateUpdate contains the subConn and the new state it changed to.
type scStateUpdate struct {
sc balancer.SubConn
state connectivity.State
}
// scStateUpdateBuffer is an unbounded channel for scStateChangeTuple.
// TODO make a general purpose buffer that uses interface{}.
type scStateUpdateBuffer struct {
c chan *scStateUpdate
mu sync.Mutex
backlog []*scStateUpdate
}
func newSCStateUpdateBuffer() *scStateUpdateBuffer {
return &scStateUpdateBuffer{
c: make(chan *scStateUpdate, 1),
}
}
func (b *scStateUpdateBuffer) put(t *scStateUpdate) {
b.mu.Lock()
defer b.mu.Unlock()
if len(b.backlog) == 0 {
select {
case b.c <- t:
return
default:
}
}
b.backlog = append(b.backlog, t)
}
func (b *scStateUpdateBuffer) load() {
b.mu.Lock()
defer b.mu.Unlock()
if len(b.backlog) > 0 {
select {
case b.c <- b.backlog[0]:
b.backlog[0] = nil
b.backlog = b.backlog[1:]
default:
}
}
}
// get returns the channel that the scStateUpdate will be sent to.
//
// Upon receiving, the caller should call load to send another
// scStateChangeTuple onto the channel if there is any.
func (b *scStateUpdateBuffer) get() <-chan *scStateUpdate {
return b.c
}
// resolverUpdate contains the new resolved addresses or error if there's
// any.
type resolverUpdate struct {
addrs []resolver.Address
err error
}
// ccBalancerWrapper is a wrapper on top of cc for balancers.
// It implements balancer.ClientConn interface.
type ccBalancerWrapper struct {
cc *ClientConn
balancer balancer.Balancer
stateChangeQueue *scStateUpdateBuffer
resolverUpdateCh chan *resolverUpdate
done chan struct{}
mu sync.Mutex
subConns map[*acBalancerWrapper]struct{}
}
func newCCBalancerWrapper(cc *ClientConn, b balancer.Builder, bopts balancer.BuildOptions) *ccBalancerWrapper {
ccb := &ccBalancerWrapper{
cc: cc,
stateChangeQueue: newSCStateUpdateBuffer(),
resolverUpdateCh: make(chan *resolverUpdate, 1),
done: make(chan struct{}),
subConns: make(map[*acBalancerWrapper]struct{}),
}
go ccb.watcher()
ccb.balancer = b.Build(ccb, bopts)
return ccb
}
// watcher balancer functions sequentially, so the balancer can be implemented
// lock-free.
func (ccb *ccBalancerWrapper) watcher() {
for {
select {
case t := <-ccb.stateChangeQueue.get():
ccb.stateChangeQueue.load()
select {
case <-ccb.done:
ccb.balancer.Close()
return
default:
}
ccb.balancer.HandleSubConnStateChange(t.sc, t.state)
case t := <-ccb.resolverUpdateCh:
select {
case <-ccb.done:
ccb.balancer.Close()
return
default:
}
ccb.balancer.HandleResolvedAddrs(t.addrs, t.err)
case <-ccb.done:
}
select {
case <-ccb.done:
ccb.balancer.Close()
ccb.mu.Lock()
scs := ccb.subConns
ccb.subConns = nil
ccb.mu.Unlock()
for acbw := range scs {
ccb.cc.removeAddrConn(acbw.getAddrConn(), errConnDrain)
}
return
default:
}
}
}
func (ccb *ccBalancerWrapper) close() {
close(ccb.done)
}
func (ccb *ccBalancerWrapper) handleSubConnStateChange(sc balancer.SubConn, s connectivity.State) {
// When updating addresses for a SubConn, if the address in use is not in
// the new addresses, the old ac will be tearDown() and a new ac will be
// created. tearDown() generates a state change with Shutdown state, we
// don't want the balancer to receive this state change. So before
// tearDown() on the old ac, ac.acbw (acWrapper) will be set to nil, and
// this function will be called with (nil, Shutdown). We don't need to call
// balancer method in this case.
if sc == nil {
return
}
ccb.stateChangeQueue.put(&scStateUpdate{
sc: sc,
state: s,
})
}
func (ccb *ccBalancerWrapper) handleResolvedAddrs(addrs []resolver.Address, err error) {
select {
case <-ccb.resolverUpdateCh:
default:
}
ccb.resolverUpdateCh <- &resolverUpdate{
addrs: addrs,
err: err,
}
}
func (ccb *ccBalancerWrapper) NewSubConn(addrs []resolver.Address, opts balancer.NewSubConnOptions) (balancer.SubConn, error) {
if len(addrs) <= 0 {
return nil, fmt.Errorf("grpc: cannot create SubConn with empty address list")
}
ccb.mu.Lock()
defer ccb.mu.Unlock()
if ccb.subConns == nil {
return nil, fmt.Errorf("grpc: ClientConn balancer wrapper was closed")
}
ac, err := ccb.cc.newAddrConn(addrs)
if err != nil {
return nil, err
}
acbw := &acBalancerWrapper{ac: ac}
acbw.ac.mu.Lock()
ac.acbw = acbw
acbw.ac.mu.Unlock()
ccb.subConns[acbw] = struct{}{}
return acbw, nil
}
func (ccb *ccBalancerWrapper) RemoveSubConn(sc balancer.SubConn) {
acbw, ok := sc.(*acBalancerWrapper)
if !ok {
return
}
ccb.mu.Lock()
defer ccb.mu.Unlock()
if ccb.subConns == nil {
return
}
delete(ccb.subConns, acbw)
ccb.cc.removeAddrConn(acbw.getAddrConn(), errConnDrain)
}
func (ccb *ccBalancerWrapper) UpdateBalancerState(s connectivity.State, p balancer.Picker) {
ccb.mu.Lock()
defer ccb.mu.Unlock()
if ccb.subConns == nil {
return
}
ccb.cc.csMgr.updateState(s)
ccb.cc.blockingpicker.updatePicker(p)
}
func (ccb *ccBalancerWrapper) ResolveNow(o resolver.ResolveNowOption) {
ccb.cc.resolveNow(o)
}
func (ccb *ccBalancerWrapper) Target() string {
return ccb.cc.target
}
// acBalancerWrapper is a wrapper on top of ac for balancers.
// It implements balancer.SubConn interface.
type acBalancerWrapper struct {
mu sync.Mutex
ac *addrConn
}
func (acbw *acBalancerWrapper) UpdateAddresses(addrs []resolver.Address) {
acbw.mu.Lock()
defer acbw.mu.Unlock()
if len(addrs) <= 0 {
acbw.ac.tearDown(errConnDrain)
return
}
if !acbw.ac.tryUpdateAddrs(addrs) {
cc := acbw.ac.cc
acbw.ac.mu.Lock()
// Set old ac.acbw to nil so the Shutdown state update will be ignored
// by balancer.
//
// TODO(bar) the state transition could be wrong when tearDown() old ac
// and creating new ac, fix the transition.
acbw.ac.acbw = nil
acbw.ac.mu.Unlock()
acState := acbw.ac.getState()
acbw.ac.tearDown(errConnDrain)
if acState == connectivity.Shutdown {
return
}
ac, err := cc.newAddrConn(addrs)
if err != nil {
grpclog.Warningf("acBalancerWrapper: UpdateAddresses: failed to newAddrConn: %v", err)
return
}
acbw.ac = ac
ac.mu.Lock()
ac.acbw = acbw
ac.mu.Unlock()
if acState != connectivity.Idle {
ac.connect()
}
}
}
func (acbw *acBalancerWrapper) Connect() {
acbw.mu.Lock()
defer acbw.mu.Unlock()
acbw.ac.connect()
}
func (acbw *acBalancerWrapper) getAddrConn() *addrConn {
acbw.mu.Lock()
defer acbw.mu.Unlock()
return acbw.ac
}

328
vendor/google.golang.org/grpc/balancer_v1_wrapper.go generated vendored Normal file
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@ -0,0 +1,328 @@
/*
*
* Copyright 2017 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package grpc
import (
"strings"
"sync"
"golang.org/x/net/context"
"google.golang.org/grpc/balancer"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/connectivity"
"google.golang.org/grpc/grpclog"
"google.golang.org/grpc/resolver"
"google.golang.org/grpc/status"
)
type balancerWrapperBuilder struct {
b Balancer // The v1 balancer.
}
func (bwb *balancerWrapperBuilder) Build(cc balancer.ClientConn, opts balancer.BuildOptions) balancer.Balancer {
targetAddr := cc.Target()
targetSplitted := strings.Split(targetAddr, ":///")
if len(targetSplitted) >= 2 {
targetAddr = targetSplitted[1]
}
bwb.b.Start(targetAddr, BalancerConfig{
DialCreds: opts.DialCreds,
Dialer: opts.Dialer,
})
_, pickfirst := bwb.b.(*pickFirst)
bw := &balancerWrapper{
balancer: bwb.b,
pickfirst: pickfirst,
cc: cc,
targetAddr: targetAddr,
startCh: make(chan struct{}),
conns: make(map[resolver.Address]balancer.SubConn),
connSt: make(map[balancer.SubConn]*scState),
csEvltr: &balancer.ConnectivityStateEvaluator{},
state: connectivity.Idle,
}
cc.UpdateBalancerState(connectivity.Idle, bw)
go bw.lbWatcher()
return bw
}
func (bwb *balancerWrapperBuilder) Name() string {
return "wrapper"
}
type scState struct {
addr Address // The v1 address type.
s connectivity.State
down func(error)
}
type balancerWrapper struct {
balancer Balancer // The v1 balancer.
pickfirst bool
cc balancer.ClientConn
targetAddr string // Target without the scheme.
mu sync.Mutex
conns map[resolver.Address]balancer.SubConn
connSt map[balancer.SubConn]*scState
// This channel is closed when handling the first resolver result.
// lbWatcher blocks until this is closed, to avoid race between
// - NewSubConn is created, cc wants to notify balancer of state changes;
// - Build hasn't return, cc doesn't have access to balancer.
startCh chan struct{}
// To aggregate the connectivity state.
csEvltr *balancer.ConnectivityStateEvaluator
state connectivity.State
}
// lbWatcher watches the Notify channel of the balancer and manages
// connections accordingly.
func (bw *balancerWrapper) lbWatcher() {
<-bw.startCh
notifyCh := bw.balancer.Notify()
if notifyCh == nil {
// There's no resolver in the balancer. Connect directly.
a := resolver.Address{
Addr: bw.targetAddr,
Type: resolver.Backend,
}
sc, err := bw.cc.NewSubConn([]resolver.Address{a}, balancer.NewSubConnOptions{})
if err != nil {
grpclog.Warningf("Error creating connection to %v. Err: %v", a, err)
} else {
bw.mu.Lock()
bw.conns[a] = sc
bw.connSt[sc] = &scState{
addr: Address{Addr: bw.targetAddr},
s: connectivity.Idle,
}
bw.mu.Unlock()
sc.Connect()
}
return
}
for addrs := range notifyCh {
grpclog.Infof("balancerWrapper: got update addr from Notify: %v\n", addrs)
if bw.pickfirst {
var (
oldA resolver.Address
oldSC balancer.SubConn
)
bw.mu.Lock()
for oldA, oldSC = range bw.conns {
break
}
bw.mu.Unlock()
if len(addrs) <= 0 {
if oldSC != nil {
// Teardown old sc.
bw.mu.Lock()
delete(bw.conns, oldA)
delete(bw.connSt, oldSC)
bw.mu.Unlock()
bw.cc.RemoveSubConn(oldSC)
}
continue
}
var newAddrs []resolver.Address
for _, a := range addrs {
newAddr := resolver.Address{
Addr: a.Addr,
Type: resolver.Backend, // All addresses from balancer are all backends.
ServerName: "",
Metadata: a.Metadata,
}
newAddrs = append(newAddrs, newAddr)
}
if oldSC == nil {
// Create new sc.
sc, err := bw.cc.NewSubConn(newAddrs, balancer.NewSubConnOptions{})
if err != nil {
grpclog.Warningf("Error creating connection to %v. Err: %v", newAddrs, err)
} else {
bw.mu.Lock()
// For pickfirst, there should be only one SubConn, so the
// address doesn't matter. All states updating (up and down)
// and picking should all happen on that only SubConn.
bw.conns[resolver.Address{}] = sc
bw.connSt[sc] = &scState{
addr: addrs[0], // Use the first address.
s: connectivity.Idle,
}
bw.mu.Unlock()
sc.Connect()
}
} else {
bw.mu.Lock()
bw.connSt[oldSC].addr = addrs[0]
bw.mu.Unlock()
oldSC.UpdateAddresses(newAddrs)
}
} else {
var (
add []resolver.Address // Addresses need to setup connections.
del []balancer.SubConn // Connections need to tear down.
)
resAddrs := make(map[resolver.Address]Address)
for _, a := range addrs {
resAddrs[resolver.Address{
Addr: a.Addr,
Type: resolver.Backend, // All addresses from balancer are all backends.
ServerName: "",
Metadata: a.Metadata,
}] = a
}
bw.mu.Lock()
for a := range resAddrs {
if _, ok := bw.conns[a]; !ok {
add = append(add, a)
}
}
for a, c := range bw.conns {
if _, ok := resAddrs[a]; !ok {
del = append(del, c)
delete(bw.conns, a)
// Keep the state of this sc in bw.connSt until its state becomes Shutdown.
}
}
bw.mu.Unlock()
for _, a := range add {
sc, err := bw.cc.NewSubConn([]resolver.Address{a}, balancer.NewSubConnOptions{})
if err != nil {
grpclog.Warningf("Error creating connection to %v. Err: %v", a, err)
} else {
bw.mu.Lock()
bw.conns[a] = sc
bw.connSt[sc] = &scState{
addr: resAddrs[a],
s: connectivity.Idle,
}
bw.mu.Unlock()
sc.Connect()
}
}
for _, c := range del {
bw.cc.RemoveSubConn(c)
}
}
}
}
func (bw *balancerWrapper) HandleSubConnStateChange(sc balancer.SubConn, s connectivity.State) {
bw.mu.Lock()
defer bw.mu.Unlock()
scSt, ok := bw.connSt[sc]
if !ok {
return
}
if s == connectivity.Idle {
sc.Connect()
}
oldS := scSt.s
scSt.s = s
if oldS != connectivity.Ready && s == connectivity.Ready {
scSt.down = bw.balancer.Up(scSt.addr)
} else if oldS == connectivity.Ready && s != connectivity.Ready {
if scSt.down != nil {
scSt.down(errConnClosing)
}
}
sa := bw.csEvltr.RecordTransition(oldS, s)
if bw.state != sa {
bw.state = sa
}
bw.cc.UpdateBalancerState(bw.state, bw)
if s == connectivity.Shutdown {
// Remove state for this sc.
delete(bw.connSt, sc)
}
}
func (bw *balancerWrapper) HandleResolvedAddrs([]resolver.Address, error) {
bw.mu.Lock()
defer bw.mu.Unlock()
select {
case <-bw.startCh:
default:
close(bw.startCh)
}
// There should be a resolver inside the balancer.
// All updates here, if any, are ignored.
}
func (bw *balancerWrapper) Close() {
bw.mu.Lock()
defer bw.mu.Unlock()
select {
case <-bw.startCh:
default:
close(bw.startCh)
}
bw.balancer.Close()
}
// The picker is the balancerWrapper itself.
// Pick should never return ErrNoSubConnAvailable.
// It either blocks or returns error, consistent with v1 balancer Get().
func (bw *balancerWrapper) Pick(ctx context.Context, opts balancer.PickOptions) (balancer.SubConn, func(balancer.DoneInfo), error) {
failfast := true // Default failfast is true.
if ss, ok := rpcInfoFromContext(ctx); ok {
failfast = ss.failfast
}
a, p, err := bw.balancer.Get(ctx, BalancerGetOptions{BlockingWait: !failfast})
if err != nil {
return nil, nil, err
}
var done func(balancer.DoneInfo)
if p != nil {
done = func(i balancer.DoneInfo) { p() }
}
var sc balancer.SubConn
bw.mu.Lock()
defer bw.mu.Unlock()
if bw.pickfirst {
// Get the first sc in conns.
for _, sc = range bw.conns {
break
}
} else {
var ok bool
sc, ok = bw.conns[resolver.Address{
Addr: a.Addr,
Type: resolver.Backend,
ServerName: "",
Metadata: a.Metadata,
}]
if !ok && failfast {
return nil, nil, status.Errorf(codes.Unavailable, "there is no connection available")
}
if s, ok := bw.connSt[sc]; failfast && (!ok || s.s != connectivity.Ready) {
// If the returned sc is not ready and RPC is failfast,
// return error, and this RPC will fail.
return nil, nil, status.Errorf(codes.Unavailable, "there is no connection available")
}
}
return sc, done, nil
}

315
vendor/google.golang.org/grpc/call.go generated vendored
View File

@ -19,291 +19,56 @@
package grpc
import (
"bytes"
"io"
"time"
"golang.org/x/net/context"
"golang.org/x/net/trace"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/peer"
"google.golang.org/grpc/stats"
"google.golang.org/grpc/status"
"google.golang.org/grpc/transport"
)
// recvResponse receives and parses an RPC response.
// On error, it returns the error and indicates whether the call should be retried.
// Invoke sends the RPC request on the wire and returns after response is
// received. This is typically called by generated code.
//
// TODO(zhaoq): Check whether the received message sequence is valid.
// TODO ctx is used for stats collection and processing. It is the context passed from the application.
func recvResponse(ctx context.Context, dopts dialOptions, t transport.ClientTransport, c *callInfo, stream *transport.Stream, reply interface{}) (err error) {
// Try to acquire header metadata from the server if there is any.
defer func() {
if err != nil {
if _, ok := err.(transport.ConnectionError); !ok {
t.CloseStream(stream, err)
}
}
}()
c.headerMD, err = stream.Header()
if err != nil {
return
}
p := &parser{r: stream}
var inPayload *stats.InPayload
if dopts.copts.StatsHandler != nil {
inPayload = &stats.InPayload{
Client: true,
}
}
for {
if c.maxReceiveMessageSize == nil {
return Errorf(codes.Internal, "callInfo maxReceiveMessageSize field uninitialized(nil)")
}
if err = recv(p, dopts.codec, stream, dopts.dc, reply, *c.maxReceiveMessageSize, inPayload); err != nil {
if err == io.EOF {
break
}
return
}
}
if inPayload != nil && err == io.EOF && stream.Status().Code() == codes.OK {
// TODO in the current implementation, inTrailer may be handled before inPayload in some cases.
// Fix the order if necessary.
dopts.copts.StatsHandler.HandleRPC(ctx, inPayload)
}
c.trailerMD = stream.Trailer()
return nil
}
// All errors returned by Invoke are compatible with the status package.
func (cc *ClientConn) Invoke(ctx context.Context, method string, args, reply interface{}, opts ...CallOption) error {
// allow interceptor to see all applicable call options, which means those
// configured as defaults from dial option as well as per-call options
opts = combine(cc.dopts.callOptions, opts)
// sendRequest writes out various information of an RPC such as Context and Message.
func sendRequest(ctx context.Context, dopts dialOptions, compressor Compressor, c *callInfo, callHdr *transport.CallHdr, stream *transport.Stream, t transport.ClientTransport, args interface{}, opts *transport.Options) (err error) {
defer func() {
if err != nil {
// If err is connection error, t will be closed, no need to close stream here.
if _, ok := err.(transport.ConnectionError); !ok {
t.CloseStream(stream, err)
}
}
}()
var (
cbuf *bytes.Buffer
outPayload *stats.OutPayload
)
if compressor != nil {
cbuf = new(bytes.Buffer)
}
if dopts.copts.StatsHandler != nil {
outPayload = &stats.OutPayload{
Client: true,
}
}
outBuf, err := encode(dopts.codec, args, compressor, cbuf, outPayload)
if err != nil {
return err
}
if c.maxSendMessageSize == nil {
return Errorf(codes.Internal, "callInfo maxSendMessageSize field uninitialized(nil)")
}
if len(outBuf) > *c.maxSendMessageSize {
return Errorf(codes.ResourceExhausted, "grpc: trying to send message larger than max (%d vs. %d)", len(outBuf), *c.maxSendMessageSize)
}
err = t.Write(stream, outBuf, opts)
if err == nil && outPayload != nil {
outPayload.SentTime = time.Now()
dopts.copts.StatsHandler.HandleRPC(ctx, outPayload)
}
// t.NewStream(...) could lead to an early rejection of the RPC (e.g., the service/method
// does not exist.) so that t.Write could get io.EOF from wait(...). Leave the following
// recvResponse to get the final status.
if err != nil && err != io.EOF {
return err
}
// Sent successfully.
return nil
}
// Invoke sends the RPC request on the wire and returns after response is received.
// Invoke is called by generated code. Also users can call Invoke directly when it
// is really needed in their use cases.
func Invoke(ctx context.Context, method string, args, reply interface{}, cc *ClientConn, opts ...CallOption) error {
if cc.dopts.unaryInt != nil {
return cc.dopts.unaryInt(ctx, method, args, reply, cc, invoke, opts...)
}
return invoke(ctx, method, args, reply, cc, opts...)
}
func invoke(ctx context.Context, method string, args, reply interface{}, cc *ClientConn, opts ...CallOption) (e error) {
c := defaultCallInfo
mc := cc.GetMethodConfig(method)
if mc.WaitForReady != nil {
c.failFast = !*mc.WaitForReady
}
if mc.Timeout != nil && *mc.Timeout >= 0 {
var cancel context.CancelFunc
ctx, cancel = context.WithTimeout(ctx, *mc.Timeout)
defer cancel()
}
opts = append(cc.dopts.callOptions, opts...)
for _, o := range opts {
if err := o.before(&c); err != nil {
return toRPCErr(err)
}
}
defer func() {
for _, o := range opts {
o.after(&c)
}
}()
c.maxSendMessageSize = getMaxSize(mc.MaxReqSize, c.maxSendMessageSize, defaultClientMaxSendMessageSize)
c.maxReceiveMessageSize = getMaxSize(mc.MaxRespSize, c.maxReceiveMessageSize, defaultClientMaxReceiveMessageSize)
if EnableTracing {
c.traceInfo.tr = trace.New("grpc.Sent."+methodFamily(method), method)
defer c.traceInfo.tr.Finish()
c.traceInfo.firstLine.client = true
if deadline, ok := ctx.Deadline(); ok {
c.traceInfo.firstLine.deadline = deadline.Sub(time.Now())
}
c.traceInfo.tr.LazyLog(&c.traceInfo.firstLine, false)
// TODO(dsymonds): Arrange for c.traceInfo.firstLine.remoteAddr to be set.
defer func() {
if e != nil {
c.traceInfo.tr.LazyLog(&fmtStringer{"%v", []interface{}{e}}, true)
c.traceInfo.tr.SetError()
}
}()
}
ctx = newContextWithRPCInfo(ctx)
sh := cc.dopts.copts.StatsHandler
if sh != nil {
ctx = sh.TagRPC(ctx, &stats.RPCTagInfo{FullMethodName: method, FailFast: c.failFast})
begin := &stats.Begin{
Client: true,
BeginTime: time.Now(),
FailFast: c.failFast,
}
sh.HandleRPC(ctx, begin)
defer func() {
end := &stats.End{
Client: true,
EndTime: time.Now(),
Error: e,
}
sh.HandleRPC(ctx, end)
}()
}
topts := &transport.Options{
Last: true,
Delay: false,
}
for {
var (
err error
t transport.ClientTransport
stream *transport.Stream
// Record the put handler from Balancer.Get(...). It is called once the
// RPC has completed or failed.
put func()
)
// TODO(zhaoq): Need a formal spec of fail-fast.
callHdr := &transport.CallHdr{
Host: cc.authority,
Method: method,
}
if cc.dopts.cp != nil {
callHdr.SendCompress = cc.dopts.cp.Type()
}
if c.creds != nil {
callHdr.Creds = c.creds
}
gopts := BalancerGetOptions{
BlockingWait: !c.failFast,
}
t, put, err = cc.getTransport(ctx, gopts)
if err != nil {
// TODO(zhaoq): Probably revisit the error handling.
if _, ok := status.FromError(err); ok {
return err
}
if err == errConnClosing || err == errConnUnavailable {
if c.failFast {
return Errorf(codes.Unavailable, "%v", err)
}
continue
}
// All the other errors are treated as Internal errors.
return Errorf(codes.Internal, "%v", err)
}
if c.traceInfo.tr != nil {
c.traceInfo.tr.LazyLog(&payload{sent: true, msg: args}, true)
}
stream, err = t.NewStream(ctx, callHdr)
if err != nil {
if put != nil {
if _, ok := err.(transport.ConnectionError); ok {
// If error is connection error, transport was sending data on wire,
// and we are not sure if anything has been sent on wire.
// If error is not connection error, we are sure nothing has been sent.
updateRPCInfoInContext(ctx, rpcInfo{bytesSent: true, bytesReceived: false})
}
put()
}
if _, ok := err.(transport.ConnectionError); (ok || err == transport.ErrStreamDrain) && !c.failFast {
continue
}
return toRPCErr(err)
}
if peer, ok := peer.FromContext(stream.Context()); ok {
c.peer = peer
}
err = sendRequest(ctx, cc.dopts, cc.dopts.cp, &c, callHdr, stream, t, args, topts)
if err != nil {
if put != nil {
updateRPCInfoInContext(ctx, rpcInfo{
bytesSent: stream.BytesSent(),
bytesReceived: stream.BytesReceived(),
})
put()
}
// Retry a non-failfast RPC when
// i) there is a connection error; or
// ii) the server started to drain before this RPC was initiated.
if _, ok := err.(transport.ConnectionError); (ok || err == transport.ErrStreamDrain) && !c.failFast {
continue
}
return toRPCErr(err)
}
err = recvResponse(ctx, cc.dopts, t, &c, stream, reply)
if err != nil {
if put != nil {
updateRPCInfoInContext(ctx, rpcInfo{
bytesSent: stream.BytesSent(),
bytesReceived: stream.BytesReceived(),
})
put()
}
if _, ok := err.(transport.ConnectionError); (ok || err == transport.ErrStreamDrain) && !c.failFast {
continue
}
return toRPCErr(err)
}
if c.traceInfo.tr != nil {
c.traceInfo.tr.LazyLog(&payload{sent: false, msg: reply}, true)
}
t.CloseStream(stream, nil)
if put != nil {
updateRPCInfoInContext(ctx, rpcInfo{
bytesSent: stream.BytesSent(),
bytesReceived: stream.BytesReceived(),
})
put()
}
return stream.Status().Err()
func combine(o1 []CallOption, o2 []CallOption) []CallOption {
// we don't use append because o1 could have extra capacity whose
// elements would be overwritten, which could cause inadvertent
// sharing (and race connditions) between concurrent calls
if len(o1) == 0 {
return o2
} else if len(o2) == 0 {
return o1
}
ret := make([]CallOption, len(o1)+len(o2))
copy(ret, o1)
copy(ret[len(o1):], o2)
return ret
}
// Invoke sends the RPC request on the wire and returns after response is
// received. This is typically called by generated code.
//
// DEPRECATED: Use ClientConn.Invoke instead.
func Invoke(ctx context.Context, method string, args, reply interface{}, cc *ClientConn, opts ...CallOption) error {
return cc.Invoke(ctx, method, args, reply, opts...)
}
var unaryStreamDesc = &StreamDesc{ServerStreams: false, ClientStreams: false}
func invoke(ctx context.Context, method string, req, reply interface{}, cc *ClientConn, opts ...CallOption) error {
cs, err := newClientStream(ctx, unaryStreamDesc, cc, method, opts...)
if err != nil {
return err
}
if err := cs.SendMsg(req); err != nil {
return err
}
return cs.RecvMsg(reply)
}

1558
vendor/google.golang.org/grpc/clientconn.go generated vendored
View File

File diff suppressed because it is too large Load Diff

88
vendor/google.golang.org/grpc/codec.go generated vendored
View File

@ -19,86 +19,32 @@
package grpc
import (
"math"
"sync"
"github.com/golang/protobuf/proto"
"google.golang.org/grpc/encoding"
_ "google.golang.org/grpc/encoding/proto" // to register the Codec for "proto"
)
// baseCodec contains the functionality of both Codec and encoding.Codec, but
// omits the name/string, which vary between the two and are not needed for
// anything besides the registry in the encoding package.
type baseCodec interface {
Marshal(v interface{}) ([]byte, error)
Unmarshal(data []byte, v interface{}) error
}
var _ baseCodec = Codec(nil)
var _ baseCodec = encoding.Codec(nil)
// Codec defines the interface gRPC uses to encode and decode messages.
// Note that implementations of this interface must be thread safe;
// a Codec's methods can be called from concurrent goroutines.
//
// Deprecated: use encoding.Codec instead.
type Codec interface {
// Marshal returns the wire format of v.
Marshal(v interface{}) ([]byte, error)
// Unmarshal parses the wire format into v.
Unmarshal(data []byte, v interface{}) error
// String returns the name of the Codec implementation. The returned
// string will be used as part of content type in transmission.
// String returns the name of the Codec implementation. This is unused by
// gRPC.
String() string
}
// protoCodec is a Codec implementation with protobuf. It is the default codec for gRPC.
type protoCodec struct {
}
type cachedProtoBuffer struct {
lastMarshaledSize uint32
proto.Buffer
}
func capToMaxInt32(val int) uint32 {
if val > math.MaxInt32 {
return uint32(math.MaxInt32)
}
return uint32(val)
}
func (p protoCodec) marshal(v interface{}, cb *cachedProtoBuffer) ([]byte, error) {
protoMsg := v.(proto.Message)
newSlice := make([]byte, 0, cb.lastMarshaledSize)
cb.SetBuf(newSlice)
cb.Reset()
if err := cb.Marshal(protoMsg); err != nil {
return nil, err
}
out := cb.Bytes()
cb.lastMarshaledSize = capToMaxInt32(len(out))
return out, nil
}
func (p protoCodec) Marshal(v interface{}) ([]byte, error) {
cb := protoBufferPool.Get().(*cachedProtoBuffer)
out, err := p.marshal(v, cb)
// put back buffer and lose the ref to the slice
cb.SetBuf(nil)
protoBufferPool.Put(cb)
return out, err
}
func (p protoCodec) Unmarshal(data []byte, v interface{}) error {
cb := protoBufferPool.Get().(*cachedProtoBuffer)
cb.SetBuf(data)
v.(proto.Message).Reset()
err := cb.Unmarshal(v.(proto.Message))
cb.SetBuf(nil)
protoBufferPool.Put(cb)
return err
}
func (protoCodec) String() string {
return "proto"
}
var (
protoBufferPool = &sync.Pool{
New: func() interface{} {
return &cachedProtoBuffer{
Buffer: proto.Buffer{},
lastMarshaledSize: 16,
}
},
}
)

66
vendor/google.golang.org/grpc/codes/code_string.go generated vendored
View File

@ -1,16 +1,62 @@
// generated by stringer -type=Code; DO NOT EDIT
/*
*
* Copyright 2017 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package codes
import "fmt"
import "strconv"
const _Code_name = "OKCanceledUnknownInvalidArgumentDeadlineExceededNotFoundAlreadyExistsPermissionDeniedResourceExhaustedFailedPreconditionAbortedOutOfRangeUnimplementedInternalUnavailableDataLossUnauthenticated"
var _Code_index = [...]uint8{0, 2, 10, 17, 32, 48, 56, 69, 85, 102, 120, 127, 137, 150, 158, 169, 177, 192}
func (i Code) String() string {
if i+1 >= Code(len(_Code_index)) {
return fmt.Sprintf("Code(%d)", i)
func (c Code) String() string {
switch c {
case OK:
return "OK"
case Canceled:
return "Canceled"
case Unknown:
return "Unknown"
case InvalidArgument:
return "InvalidArgument"
case DeadlineExceeded:
return "DeadlineExceeded"
case NotFound:
return "NotFound"
case AlreadyExists:
return "AlreadyExists"
case PermissionDenied:
return "PermissionDenied"
case ResourceExhausted:
return "ResourceExhausted"
case FailedPrecondition:
return "FailedPrecondition"
case Aborted:
return "Aborted"
case OutOfRange:
return "OutOfRange"
case Unimplemented:
return "Unimplemented"
case Internal:
return "Internal"
case Unavailable:
return "Unavailable"
case DataLoss:
return "DataLoss"
case Unauthenticated:
return "Unauthenticated"
default:
return "Code(" + strconv.FormatInt(int64(c), 10) + ")"
}
return _Code_name[_Code_index[i]:_Code_index[i+1]]
}

79
vendor/google.golang.org/grpc/codes/codes.go generated vendored
View File

@ -20,11 +20,14 @@
// consistent across various languages.
package codes // import "google.golang.org/grpc/codes"
import (
"fmt"
"strconv"
)
// A Code is an unsigned 32-bit error code as defined in the gRPC spec.
type Code uint32
//go:generate stringer -type=Code
const (
// OK is returned on success.
OK Code = 0
@ -32,9 +35,9 @@ const (
// Canceled indicates the operation was canceled (typically by the caller).
Canceled Code = 1
// Unknown error. An example of where this error may be returned is
// Unknown error. An example of where this error may be returned is
// if a Status value received from another address space belongs to
// an error-space that is not known in this address space. Also
// an error-space that is not known in this address space. Also
// errors raised by APIs that do not return enough error information
// may be converted to this error.
Unknown Code = 2
@ -63,15 +66,11 @@ const (
// PermissionDenied indicates the caller does not have permission to
// execute the specified operation. It must not be used for rejections
// caused by exhausting some resource (use ResourceExhausted
// instead for those errors). It must not be
// instead for those errors). It must not be
// used if the caller cannot be identified (use Unauthenticated
// instead for those errors).
PermissionDenied Code = 7
// Unauthenticated indicates the request does not have valid
// authentication credentials for the operation.
Unauthenticated Code = 16
// ResourceExhausted indicates some resource has been exhausted, perhaps
// a per-user quota, or perhaps the entire file system is out of space.
ResourceExhausted Code = 8
@ -87,7 +86,7 @@ const (
// (b) Use Aborted if the client should retry at a higher-level
// (e.g., restarting a read-modify-write sequence).
// (c) Use FailedPrecondition if the client should not retry until
// the system state has been explicitly fixed. E.g., if an "rmdir"
// the system state has been explicitly fixed. E.g., if an "rmdir"
// fails because the directory is non-empty, FailedPrecondition
// should be returned since the client should not retry unless
// they have first fixed up the directory by deleting files from it.
@ -116,7 +115,7 @@ const (
// file size.
//
// There is a fair bit of overlap between FailedPrecondition and
// OutOfRange. We recommend using OutOfRange (the more specific
// OutOfRange. We recommend using OutOfRange (the more specific
// error) when it applies so that callers who are iterating through
// a space can easily look for an OutOfRange error to detect when
// they are done.
@ -126,8 +125,8 @@ const (
// supported/enabled in this service.
Unimplemented Code = 12
// Internal errors. Means some invariants expected by underlying
// system has been broken. If you see one of these errors,
// Internal errors. Means some invariants expected by underlying
// system has been broken. If you see one of these errors,
// something is very broken.
Internal Code = 13
@ -141,4 +140,58 @@ const (
// DataLoss indicates unrecoverable data loss or corruption.
DataLoss Code = 15
// Unauthenticated indicates the request does not have valid
// authentication credentials for the operation.
Unauthenticated Code = 16
_maxCode = 17
)
var strToCode = map[string]Code{
`"OK"`: OK,
`"CANCELLED"`:/* [sic] */ Canceled,
`"UNKNOWN"`: Unknown,
`"INVALID_ARGUMENT"`: InvalidArgument,
`"DEADLINE_EXCEEDED"`: DeadlineExceeded,
`"NOT_FOUND"`: NotFound,
`"ALREADY_EXISTS"`: AlreadyExists,
`"PERMISSION_DENIED"`: PermissionDenied,
`"RESOURCE_EXHAUSTED"`: ResourceExhausted,
`"FAILED_PRECONDITION"`: FailedPrecondition,
`"ABORTED"`: Aborted,
`"OUT_OF_RANGE"`: OutOfRange,
`"UNIMPLEMENTED"`: Unimplemented,
`"INTERNAL"`: Internal,
`"UNAVAILABLE"`: Unavailable,
`"DATA_LOSS"`: DataLoss,
`"UNAUTHENTICATED"`: Unauthenticated,
}
// UnmarshalJSON unmarshals b into the Code.
func (c *Code) UnmarshalJSON(b []byte) error {
// From json.Unmarshaler: By convention, to approximate the behavior of
// Unmarshal itself, Unmarshalers implement UnmarshalJSON([]byte("null")) as
// a no-op.
if string(b) == "null" {
return nil
}
if c == nil {
return fmt.Errorf("nil receiver passed to UnmarshalJSON")
}
if ci, err := strconv.ParseUint(string(b), 10, 32); err == nil {
if ci >= _maxCode {
return fmt.Errorf("invalid code: %q", ci)
}
*c = Code(ci)
return nil
}
if jc, ok := strToCode[string(b)]; ok {
*c = jc
return nil
}
return fmt.Errorf("invalid code: %q", string(b))
}

48
vendor/google.golang.org/grpc/coverage.sh generated vendored
View File

@ -1,48 +0,0 @@
#!/usr/bin/env bash
set -e
workdir=.cover
profile="$workdir/cover.out"
mode=set
end2endtest="google.golang.org/grpc/test"
generate_cover_data() {
rm -rf "$workdir"
mkdir "$workdir"
for pkg in "$@"; do
if [ $pkg == "google.golang.org/grpc" -o $pkg == "google.golang.org/grpc/transport" -o $pkg == "google.golang.org/grpc/metadata" -o $pkg == "google.golang.org/grpc/credentials" ]
then
f="$workdir/$(echo $pkg | tr / -)"
go test -covermode="$mode" -coverprofile="$f.cover" "$pkg"
go test -covermode="$mode" -coverpkg "$pkg" -coverprofile="$f.e2e.cover" "$end2endtest"
fi
done
echo "mode: $mode" >"$profile"
grep -h -v "^mode:" "$workdir"/*.cover >>"$profile"
}
show_cover_report() {
go tool cover -${1}="$profile"
}
push_to_coveralls() {
goveralls -coverprofile="$profile"
}
generate_cover_data $(go list ./...)
show_cover_report func
case "$1" in
"")
;;
--html)
show_cover_report html ;;
--coveralls)
push_to_coveralls ;;
*)
echo >&2 "error: invalid option: $1" ;;
esac
rm -rf "$workdir"

108
vendor/google.golang.org/grpc/credentials/credentials.go generated vendored
View File

@ -31,13 +31,12 @@ import (
"net"
"strings"
"github.com/golang/protobuf/proto"
"golang.org/x/net/context"
)
var (
// alpnProtoStr are the specified application level protocols for gRPC.
alpnProtoStr = []string{"h2"}
)
// alpnProtoStr are the specified application level protocols for gRPC.
var alpnProtoStr = []string{"h2"}
// PerRPCCredentials defines the common interface for the credentials which need to
// attach security information to every RPC (e.g., oauth2).
@ -45,8 +44,9 @@ type PerRPCCredentials interface {
// GetRequestMetadata gets the current request metadata, refreshing
// tokens if required. This should be called by the transport layer on
// each request, and the data should be populated in headers or other
// context. uri is the URI of the entry point for the request. When
// supported by the underlying implementation, ctx can be used for
// context. If a status code is returned, it will be used as the status
// for the RPC. uri is the URI of the entry point for the request.
// When supported by the underlying implementation, ctx can be used for
// timeout and cancellation.
// TODO(zhaoq): Define the set of the qualified keys instead of leaving
// it as an arbitrary string.
@ -74,11 +74,9 @@ type AuthInfo interface {
AuthType() string
}
var (
// ErrConnDispatched indicates that rawConn has been dispatched out of gRPC
// and the caller should not close rawConn.
ErrConnDispatched = errors.New("credentials: rawConn is dispatched out of gRPC")
)
// ErrConnDispatched indicates that rawConn has been dispatched out of gRPC
// and the caller should not close rawConn.
var ErrConnDispatched = errors.New("credentials: rawConn is dispatched out of gRPC")
// TransportCredentials defines the common interface for all the live gRPC wire
// protocols and supported transport security protocols (e.g., TLS, SSL).
@ -91,10 +89,14 @@ type TransportCredentials interface {
// (io.EOF, context.DeadlineExceeded or err.Temporary() == true).
// If the returned error is a wrapper error, implementations should make sure that
// the error implements Temporary() to have the correct retry behaviors.
//
// If the returned net.Conn is closed, it MUST close the net.Conn provided.
ClientHandshake(context.Context, string, net.Conn) (net.Conn, AuthInfo, error)
// ServerHandshake does the authentication handshake for servers. It returns
// the authenticated connection and the corresponding auth information about
// the connection.
//
// If the returned net.Conn is closed, it MUST close the net.Conn provided.
ServerHandshake(net.Conn) (net.Conn, AuthInfo, error)
// Info provides the ProtocolInfo of this TransportCredentials.
Info() ProtocolInfo
@ -117,6 +119,18 @@ func (t TLSInfo) AuthType() string {
return "tls"
}
// GetChannelzSecurityValue returns security info requested by channelz.
func (t TLSInfo) GetChannelzSecurityValue() ChannelzSecurityValue {
v := &TLSChannelzSecurityValue{
StandardName: cipherSuiteLookup[t.State.CipherSuite],
}
// Currently there's no way to get LocalCertificate info from tls package.
if len(t.State.PeerCertificates) > 0 {
v.RemoteCertificate = t.State.PeerCertificates[0].Raw
}
return v
}
// tlsCreds is the credentials required for authenticating a connection using TLS.
type tlsCreds struct {
// TLS configuration
@ -131,15 +145,15 @@ func (c tlsCreds) Info() ProtocolInfo {
}
}
func (c *tlsCreds) ClientHandshake(ctx context.Context, addr string, rawConn net.Conn) (_ net.Conn, _ AuthInfo, err error) {
func (c *tlsCreds) ClientHandshake(ctx context.Context, authority string, rawConn net.Conn) (_ net.Conn, _ AuthInfo, err error) {
// use local cfg to avoid clobbering ServerName if using multiple endpoints
cfg := cloneTLSConfig(c.config)
if cfg.ServerName == "" {
colonPos := strings.LastIndex(addr, ":")
colonPos := strings.LastIndex(authority, ":")
if colonPos == -1 {
colonPos = len(addr)
colonPos = len(authority)
}
cfg.ServerName = addr[:colonPos]
cfg.ServerName = authority[:colonPos]
}
conn := tls.Client(rawConn, cfg)
errChannel := make(chan error, 1)
@ -154,7 +168,7 @@ func (c *tlsCreds) ClientHandshake(ctx context.Context, addr string, rawConn net
case <-ctx.Done():
return nil, nil, ctx.Err()
}
return conn, TLSInfo{conn.ConnectionState()}, nil
return tlsConn{Conn: conn, rawConn: rawConn}, TLSInfo{conn.ConnectionState()}, nil
}
func (c *tlsCreds) ServerHandshake(rawConn net.Conn) (net.Conn, AuthInfo, error) {
@ -162,7 +176,7 @@ func (c *tlsCreds) ServerHandshake(rawConn net.Conn) (net.Conn, AuthInfo, error)
if err := conn.Handshake(); err != nil {
return nil, nil, err
}
return conn, TLSInfo{conn.ConnectionState()}, nil
return tlsConn{Conn: conn, rawConn: rawConn}, TLSInfo{conn.ConnectionState()}, nil
}
func (c *tlsCreds) Clone() TransportCredentials {
@ -217,3 +231,63 @@ func NewServerTLSFromFile(certFile, keyFile string) (TransportCredentials, error
}
return NewTLS(&tls.Config{Certificates: []tls.Certificate{cert}}), nil
}
// ChannelzSecurityInfo defines the interface that security protocols should implement
// in order to provide security info to channelz.
type ChannelzSecurityInfo interface {
GetSecurityValue() ChannelzSecurityValue
}
// ChannelzSecurityValue defines the interface that GetSecurityValue() return value
// should satisfy. This interface should only be satisfied by *TLSChannelzSecurityValue
// and *OtherChannelzSecurityValue.
type ChannelzSecurityValue interface {
isChannelzSecurityValue()
}
// TLSChannelzSecurityValue defines the struct that TLS protocol should return
// from GetSecurityValue(), containing security info like cipher and certificate used.
type TLSChannelzSecurityValue struct {
StandardName string
LocalCertificate []byte
RemoteCertificate []byte
}
func (*TLSChannelzSecurityValue) isChannelzSecurityValue() {}
// OtherChannelzSecurityValue defines the struct that non-TLS protocol should return
// from GetSecurityValue(), which contains protocol specific security info. Note
// the Value field will be sent to users of channelz requesting channel info, and
// thus sensitive info should better be avoided.
type OtherChannelzSecurityValue struct {
Name string
Value proto.Message
}
func (*OtherChannelzSecurityValue) isChannelzSecurityValue() {}
type tlsConn struct {
*tls.Conn
rawConn net.Conn
}
var cipherSuiteLookup = map[uint16]string{
tls.TLS_RSA_WITH_RC4_128_SHA: "TLS_RSA_WITH_RC4_128_SHA",
tls.TLS_RSA_WITH_3DES_EDE_CBC_SHA: "TLS_RSA_WITH_3DES_EDE_CBC_SHA",
tls.TLS_RSA_WITH_AES_128_CBC_SHA: "TLS_RSA_WITH_AES_128_CBC_SHA",
tls.TLS_RSA_WITH_AES_256_CBC_SHA: "TLS_RSA_WITH_AES_256_CBC_SHA",
tls.TLS_RSA_WITH_AES_128_GCM_SHA256: "TLS_RSA_WITH_AES_128_GCM_SHA256",
tls.TLS_RSA_WITH_AES_256_GCM_SHA384: "TLS_RSA_WITH_AES_256_GCM_SHA384",
tls.TLS_ECDHE_ECDSA_WITH_RC4_128_SHA: "TLS_ECDHE_ECDSA_WITH_RC4_128_SHA",
tls.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA: "TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA",
tls.TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA: "TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA",
tls.TLS_ECDHE_RSA_WITH_RC4_128_SHA: "TLS_ECDHE_RSA_WITH_RC4_128_SHA",
tls.TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA: "TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA",
tls.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA: "TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA",
tls.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA: "TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA",
tls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256: "TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256",
tls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256: "TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256",
tls.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384: "TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384",
tls.TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384: "TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384",
tls.TLS_FALLBACK_SCSV: "TLS_FALLBACK_SCSV",
}

0
vendor/google.golang.org/grpc/credentials/credentials_util_pre_go17.go → vendor/google.golang.org/grpc/credentials/go16.go generated vendored
View File

3
vendor/google.golang.org/grpc/credentials/credentials_util_go17.go → vendor/google.golang.org/grpc/credentials/go17.go generated vendored
View File

@ -1,5 +1,4 @@
// +build go1.7
// +build !go1.8
// +build go1.7,!go1.8
/*
*

8
vendor/google.golang.org/grpc/credentials/credentials_util_go18.go → vendor/google.golang.org/grpc/credentials/go18.go generated vendored
View File

@ -24,6 +24,14 @@ import (
"crypto/tls"
)
func init() {
cipherSuiteLookup[tls.TLS_RSA_WITH_AES_128_CBC_SHA256] = "TLS_RSA_WITH_AES_128_CBC_SHA256"
cipherSuiteLookup[tls.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256] = "TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256"
cipherSuiteLookup[tls.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256] = "TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256"
cipherSuiteLookup[tls.TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305] = "TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305"
cipherSuiteLookup[tls.TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305] = "TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305"
}
// cloneTLSConfig returns a shallow clone of the exported
// fields of cfg, ignoring the unexported sync.Once, which
// contains a mutex and must not be copied.

35
vendor/google.golang.org/grpc/credentials/go19.go generated vendored Normal file
View File

@ -0,0 +1,35 @@
// +build go1.9,!appengine
/*
*
* Copyright 2018 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package credentials
import (
"errors"
"syscall"
)
// implements the syscall.Conn interface
func (c tlsConn) SyscallConn() (syscall.RawConn, error) {
conn, ok := c.rawConn.(syscall.Conn)
if !ok {
return nil, errors.New("RawConn does not implement syscall.Conn")
}
return conn.SyscallConn()
}

450
vendor/google.golang.org/grpc/dialoptions.go generated vendored Normal file
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@ -0,0 +1,450 @@
/*
*
* Copyright 2018 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package grpc
import (
"fmt"
"net"
"time"
"golang.org/x/net/context"
"google.golang.org/grpc/balancer"
"google.golang.org/grpc/credentials"
"google.golang.org/grpc/internal"
"google.golang.org/grpc/internal/backoff"
"google.golang.org/grpc/internal/envconfig"
"google.golang.org/grpc/internal/transport"
"google.golang.org/grpc/keepalive"
"google.golang.org/grpc/resolver"
"google.golang.org/grpc/stats"
)
// dialOptions configure a Dial call. dialOptions are set by the DialOption
// values passed to Dial.
type dialOptions struct {
unaryInt UnaryClientInterceptor
streamInt StreamClientInterceptor
cp Compressor
dc Decompressor
bs backoff.Strategy
block bool
insecure bool
timeout time.Duration
scChan <-chan ServiceConfig
authority string
copts transport.ConnectOptions
callOptions []CallOption
// This is used by v1 balancer dial option WithBalancer to support v1
// balancer, and also by WithBalancerName dial option.
balancerBuilder balancer.Builder
// This is to support grpclb.
resolverBuilder resolver.Builder
waitForHandshake bool
channelzParentID int64
disableServiceConfig bool
disableRetry bool
}
// DialOption configures how we set up the connection.
type DialOption interface {
apply(*dialOptions)
}
// EmptyDialOption does not alter the dial configuration. It can be embedded in
// another structure to build custom dial options.
//
// This API is EXPERIMENTAL.
type EmptyDialOption struct{}
func (EmptyDialOption) apply(*dialOptions) {}
// funcDialOption wraps a function that modifies dialOptions into an
// implementation of the DialOption interface.
type funcDialOption struct {
f func(*dialOptions)
}
func (fdo *funcDialOption) apply(do *dialOptions) {
fdo.f(do)
}
func newFuncDialOption(f func(*dialOptions)) *funcDialOption {
return &funcDialOption{
f: f,
}
}
// WithWaitForHandshake blocks until the initial settings frame is received from
// the server before assigning RPCs to the connection. Experimental API.
func WithWaitForHandshake() DialOption {
return newFuncDialOption(func(o *dialOptions) {
o.waitForHandshake = true
})
}
// WithWriteBufferSize determines how much data can be batched before doing a
// write on the wire. The corresponding memory allocation for this buffer will
// be twice the size to keep syscalls low. The default value for this buffer is
// 32KB.
//
// Zero will disable the write buffer such that each write will be on underlying
// connection. Note: A Send call may not directly translate to a write.
func WithWriteBufferSize(s int) DialOption {
return newFuncDialOption(func(o *dialOptions) {
o.copts.WriteBufferSize = s
})
}
// WithReadBufferSize lets you set the size of read buffer, this determines how
// much data can be read at most for each read syscall.
//
// The default value for this buffer is 32KB. Zero will disable read buffer for
// a connection so data framer can access the underlying conn directly.
func WithReadBufferSize(s int) DialOption {
return newFuncDialOption(func(o *dialOptions) {
o.copts.ReadBufferSize = s
})
}
// WithInitialWindowSize returns a DialOption which sets the value for initial
// window size on a stream. The lower bound for window size is 64K and any value
// smaller than that will be ignored.
func WithInitialWindowSize(s int32) DialOption {
return newFuncDialOption(func(o *dialOptions) {
o.copts.InitialWindowSize = s
})
}
// WithInitialConnWindowSize returns a DialOption which sets the value for
// initial window size on a connection. The lower bound for window size is 64K
// and any value smaller than that will be ignored.
func WithInitialConnWindowSize(s int32) DialOption {
return newFuncDialOption(func(o *dialOptions) {
o.copts.InitialConnWindowSize = s
})
}
// WithMaxMsgSize returns a DialOption which sets the maximum message size the
// client can receive.
//
// Deprecated: use WithDefaultCallOptions(MaxCallRecvMsgSize(s)) instead.
func WithMaxMsgSize(s int) DialOption {
return WithDefaultCallOptions(MaxCallRecvMsgSize(s))
}
// WithDefaultCallOptions returns a DialOption which sets the default
// CallOptions for calls over the connection.
func WithDefaultCallOptions(cos ...CallOption) DialOption {
return newFuncDialOption(func(o *dialOptions) {
o.callOptions = append(o.callOptions, cos...)
})
}
// WithCodec returns a DialOption which sets a codec for message marshaling and
// unmarshaling.
//
// Deprecated: use WithDefaultCallOptions(CallCustomCodec(c)) instead.
func WithCodec(c Codec) DialOption {
return WithDefaultCallOptions(CallCustomCodec(c))
}
// WithCompressor returns a DialOption which sets a Compressor to use for
// message compression. It has lower priority than the compressor set by the
// UseCompressor CallOption.
//
// Deprecated: use UseCompressor instead.
func WithCompressor(cp Compressor) DialOption {
return newFuncDialOption(func(o *dialOptions) {
o.cp = cp
})
}
// WithDecompressor returns a DialOption which sets a Decompressor to use for
// incoming message decompression. If incoming response messages are encoded
// using the decompressor's Type(), it will be used. Otherwise, the message
// encoding will be used to look up the compressor registered via
// encoding.RegisterCompressor, which will then be used to decompress the
// message. If no compressor is registered for the encoding, an Unimplemented
// status error will be returned.
//
// Deprecated: use encoding.RegisterCompressor instead.
func WithDecompressor(dc Decompressor) DialOption {
return newFuncDialOption(func(o *dialOptions) {
o.dc = dc
})
}
// WithBalancer returns a DialOption which sets a load balancer with the v1 API.
// Name resolver will be ignored if this DialOption is specified.
//
// Deprecated: use the new balancer APIs in balancer package and
// WithBalancerName.
func WithBalancer(b Balancer) DialOption {
return newFuncDialOption(func(o *dialOptions) {
o.balancerBuilder = &balancerWrapperBuilder{
b: b,
}
})
}
// WithBalancerName sets the balancer that the ClientConn will be initialized
// with. Balancer registered with balancerName will be used. This function
// panics if no balancer was registered by balancerName.
//
// The balancer cannot be overridden by balancer option specified by service
// config.
//
// This is an EXPERIMENTAL API.
func WithBalancerName(balancerName string) DialOption {
builder := balancer.Get(balancerName)
if builder == nil {
panic(fmt.Sprintf("grpc.WithBalancerName: no balancer is registered for name %v", balancerName))
}
return newFuncDialOption(func(o *dialOptions) {
o.balancerBuilder = builder
})
}
// withResolverBuilder is only for grpclb.
func withResolverBuilder(b resolver.Builder) DialOption {
return newFuncDialOption(func(o *dialOptions) {
o.resolverBuilder = b
})
}
// WithServiceConfig returns a DialOption which has a channel to read the
// service configuration.
//
// Deprecated: service config should be received through name resolver, as
// specified here.
// https://github.com/grpc/grpc/blob/master/doc/service_config.md
func WithServiceConfig(c <-chan ServiceConfig) DialOption {
return newFuncDialOption(func(o *dialOptions) {
o.scChan = c
})
}
// WithBackoffMaxDelay configures the dialer to use the provided maximum delay
// when backing off after failed connection attempts.
func WithBackoffMaxDelay(md time.Duration) DialOption {
return WithBackoffConfig(BackoffConfig{MaxDelay: md})
}
// WithBackoffConfig configures the dialer to use the provided backoff
// parameters after connection failures.
//
// Use WithBackoffMaxDelay until more parameters on BackoffConfig are opened up
// for use.
func WithBackoffConfig(b BackoffConfig) DialOption {
return withBackoff(backoff.Exponential{
MaxDelay: b.MaxDelay,
})
}
// withBackoff sets the backoff strategy used for connectRetryNum after a failed
// connection attempt.
//
// This can be exported if arbitrary backoff strategies are allowed by gRPC.
func withBackoff(bs backoff.Strategy) DialOption {
return newFuncDialOption(func(o *dialOptions) {
o.bs = bs
})
}
// WithBlock returns a DialOption which makes caller of Dial blocks until the
// underlying connection is up. Without this, Dial returns immediately and
// connecting the server happens in background.
func WithBlock() DialOption {
return newFuncDialOption(func(o *dialOptions) {
o.block = true
})
}
// WithInsecure returns a DialOption which disables transport security for this
// ClientConn. Note that transport security is required unless WithInsecure is
// set.
func WithInsecure() DialOption {
return newFuncDialOption(func(o *dialOptions) {
o.insecure = true
})
}
// WithTransportCredentials returns a DialOption which configures a connection
// level security credentials (e.g., TLS/SSL).
func WithTransportCredentials(creds credentials.TransportCredentials) DialOption {
return newFuncDialOption(func(o *dialOptions) {
o.copts.TransportCredentials = creds
})
}
// WithPerRPCCredentials returns a DialOption which sets credentials and places
// auth state on each outbound RPC.
func WithPerRPCCredentials(creds credentials.PerRPCCredentials) DialOption {
return newFuncDialOption(func(o *dialOptions) {
o.copts.PerRPCCredentials = append(o.copts.PerRPCCredentials, creds)
})
}
// WithTimeout returns a DialOption that configures a timeout for dialing a
// ClientConn initially. This is valid if and only if WithBlock() is present.
//
// Deprecated: use DialContext and context.WithTimeout instead.
func WithTimeout(d time.Duration) DialOption {
return newFuncDialOption(func(o *dialOptions) {
o.timeout = d
})
}
func withContextDialer(f func(context.Context, string) (net.Conn, error)) DialOption {
return newFuncDialOption(func(o *dialOptions) {
o.copts.Dialer = f
})
}
func init() {
internal.WithContextDialer = withContextDialer
internal.WithResolverBuilder = withResolverBuilder
}
// WithDialer returns a DialOption that specifies a function to use for dialing
// network addresses. If FailOnNonTempDialError() is set to true, and an error
// is returned by f, gRPC checks the error's Temporary() method to decide if it
// should try to reconnect to the network address.
func WithDialer(f func(string, time.Duration) (net.Conn, error)) DialOption {
return withContextDialer(
func(ctx context.Context, addr string) (net.Conn, error) {
if deadline, ok := ctx.Deadline(); ok {
return f(addr, deadline.Sub(time.Now()))
}
return f(addr, 0)
})
}
// WithStatsHandler returns a DialOption that specifies the stats handler for
// all the RPCs and underlying network connections in this ClientConn.
func WithStatsHandler(h stats.Handler) DialOption {
return newFuncDialOption(func(o *dialOptions) {
o.copts.StatsHandler = h
})
}
// FailOnNonTempDialError returns a DialOption that specifies if gRPC fails on
// non-temporary dial errors. If f is true, and dialer returns a non-temporary
// error, gRPC will fail the connection to the network address and won't try to
// reconnect. The default value of FailOnNonTempDialError is false.
//
// This is an EXPERIMENTAL API.
func FailOnNonTempDialError(f bool) DialOption {
return newFuncDialOption(func(o *dialOptions) {
o.copts.FailOnNonTempDialError = f
})
}
// WithUserAgent returns a DialOption that specifies a user agent string for all
// the RPCs.
func WithUserAgent(s string) DialOption {
return newFuncDialOption(func(o *dialOptions) {
o.copts.UserAgent = s
})
}
// WithKeepaliveParams returns a DialOption that specifies keepalive parameters
// for the client transport.
func WithKeepaliveParams(kp keepalive.ClientParameters) DialOption {
return newFuncDialOption(func(o *dialOptions) {
o.copts.KeepaliveParams = kp
})
}
// WithUnaryInterceptor returns a DialOption that specifies the interceptor for
// unary RPCs.
func WithUnaryInterceptor(f UnaryClientInterceptor) DialOption {
return newFuncDialOption(func(o *dialOptions) {
o.unaryInt = f
})
}
// WithStreamInterceptor returns a DialOption that specifies the interceptor for
// streaming RPCs.
func WithStreamInterceptor(f StreamClientInterceptor) DialOption {
return newFuncDialOption(func(o *dialOptions) {
o.streamInt = f
})
}
// WithAuthority returns a DialOption that specifies the value to be used as the
// :authority pseudo-header. This value only works with WithInsecure and has no
// effect if TransportCredentials are present.
func WithAuthority(a string) DialOption {
return newFuncDialOption(func(o *dialOptions) {
o.authority = a
})
}
// WithChannelzParentID returns a DialOption that specifies the channelz ID of
// current ClientConn's parent. This function is used in nested channel creation
// (e.g. grpclb dial).
func WithChannelzParentID(id int64) DialOption {
return newFuncDialOption(func(o *dialOptions) {
o.channelzParentID = id
})
}
// WithDisableServiceConfig returns a DialOption that causes grpc to ignore any
// service config provided by the resolver and provides a hint to the resolver
// to not fetch service configs.
func WithDisableServiceConfig() DialOption {
return newFuncDialOption(func(o *dialOptions) {
o.disableServiceConfig = true
})
}
// WithDisableRetry returns a DialOption that disables retries, even if the
// service config enables them. This does not impact transparent retries, which
// will happen automatically if no data is written to the wire or if the RPC is
// unprocessed by the remote server.
//
// Retry support is currently disabled by default, but will be enabled by
// default in the future. Until then, it may be enabled by setting the
// environment variable "GRPC_GO_RETRY" to "on".
//
// This API is EXPERIMENTAL.
func WithDisableRetry() DialOption {
return newFuncDialOption(func(o *dialOptions) {
o.disableRetry = true
})
}
// WithMaxHeaderListSize returns a DialOption that specifies the maximum
// (uncompressed) size of header list that the client is prepared to accept.
func WithMaxHeaderListSize(s uint32) DialOption {
return newFuncDialOption(func(o *dialOptions) {
o.copts.MaxHeaderListSize = &s
})
}
func defaultDialOptions() dialOptions {
return dialOptions{
disableRetry: !envconfig.Retry,
copts: transport.ConnectOptions{
WriteBufferSize: defaultWriteBufSize,
ReadBufferSize: defaultReadBufSize,
},
}
}

118
vendor/google.golang.org/grpc/encoding/encoding.go generated vendored Normal file
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@ -0,0 +1,118 @@
/*
*
* Copyright 2017 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
// Package encoding defines the interface for the compressor and codec, and
// functions to register and retrieve compressors and codecs.
//
// This package is EXPERIMENTAL.
package encoding
import (
"io"
"strings"
)
// Identity specifies the optional encoding for uncompressed streams.
// It is intended for grpc internal use only.
const Identity = "identity"
// Compressor is used for compressing and decompressing when sending or
// receiving messages.
type Compressor interface {
// Compress writes the data written to wc to w after compressing it. If an
// error occurs while initializing the compressor, that error is returned
// instead.
Compress(w io.Writer) (io.WriteCloser, error)
// Decompress reads data from r, decompresses it, and provides the
// uncompressed data via the returned io.Reader. If an error occurs while
// initializing the decompressor, that error is returned instead.
Decompress(r io.Reader) (io.Reader, error)
// Name is the name of the compression codec and is used to set the content
// coding header. The result must be static; the result cannot change
// between calls.
Name() string
}
var registeredCompressor = make(map[string]Compressor)
// RegisterCompressor registers the compressor with gRPC by its name. It can
// be activated when sending an RPC via grpc.UseCompressor(). It will be
// automatically accessed when receiving a message based on the content coding
// header. Servers also use it to send a response with the same encoding as
// the request.
//
// NOTE: this function must only be called during initialization time (i.e. in
// an init() function), and is not thread-safe. If multiple Compressors are
// registered with the same name, the one registered last will take effect.
func RegisterCompressor(c Compressor) {
registeredCompressor[c.Name()] = c
}
// GetCompressor returns Compressor for the given compressor name.
func GetCompressor(name string) Compressor {
return registeredCompressor[name]
}
// Codec defines the interface gRPC uses to encode and decode messages. Note
// that implementations of this interface must be thread safe; a Codec's
// methods can be called from concurrent goroutines.
type Codec interface {
// Marshal returns the wire format of v.
Marshal(v interface{}) ([]byte, error)
// Unmarshal parses the wire format into v.
Unmarshal(data []byte, v interface{}) error
// Name returns the name of the Codec implementation. The returned string
// will be used as part of content type in transmission. The result must be
// static; the result cannot change between calls.
Name() string
}
var registeredCodecs = make(map[string]Codec)
// RegisterCodec registers the provided Codec for use with all gRPC clients and
// servers.
//
// The Codec will be stored and looked up by result of its Name() method, which
// should match the content-subtype of the encoding handled by the Codec. This
// is case-insensitive, and is stored and looked up as lowercase. If the
// result of calling Name() is an empty string, RegisterCodec will panic. See
// Content-Type on
// https://github.com/grpc/grpc/blob/master/doc/PROTOCOL-HTTP2.md#requests for
// more details.
//
// NOTE: this function must only be called during initialization time (i.e. in
// an init() function), and is not thread-safe. If multiple Compressors are
// registered with the same name, the one registered last will take effect.
func RegisterCodec(codec Codec) {
if codec == nil {
panic("cannot register a nil Codec")
}
contentSubtype := strings.ToLower(codec.Name())
if contentSubtype == "" {
panic("cannot register Codec with empty string result for String()")
}
registeredCodecs[contentSubtype] = codec
}
// GetCodec gets a registered Codec by content-subtype, or nil if no Codec is
// registered for the content-subtype.
//
// The content-subtype is expected to be lowercase.
func GetCodec(contentSubtype string) Codec {
return registeredCodecs[contentSubtype]
}

110
vendor/google.golang.org/grpc/encoding/proto/proto.go generated vendored Normal file
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@ -0,0 +1,110 @@
/*
*
* Copyright 2018 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
// Package proto defines the protobuf codec. Importing this package will
// register the codec.
package proto
import (
"math"
"sync"
"github.com/golang/protobuf/proto"
"google.golang.org/grpc/encoding"
)
// Name is the name registered for the proto compressor.
const Name = "proto"
func init() {
encoding.RegisterCodec(codec{})
}
// codec is a Codec implementation with protobuf. It is the default codec for gRPC.
type codec struct{}
type cachedProtoBuffer struct {
lastMarshaledSize uint32
proto.Buffer
}
func capToMaxInt32(val int) uint32 {
if val > math.MaxInt32 {
return uint32(math.MaxInt32)
}
return uint32(val)
}
func marshal(v interface{}, cb *cachedProtoBuffer) ([]byte, error) {
protoMsg := v.(proto.Message)
newSlice := make([]byte, 0, cb.lastMarshaledSize)
cb.SetBuf(newSlice)
cb.Reset()
if err := cb.Marshal(protoMsg); err != nil {
return nil, err
}
out := cb.Bytes()
cb.lastMarshaledSize = capToMaxInt32(len(out))
return out, nil
}
func (codec) Marshal(v interface{}) ([]byte, error) {
if pm, ok := v.(proto.Marshaler); ok {
// object can marshal itself, no need for buffer
return pm.Marshal()
}
cb := protoBufferPool.Get().(*cachedProtoBuffer)
out, err := marshal(v, cb)
// put back buffer and lose the ref to the slice
cb.SetBuf(nil)
protoBufferPool.Put(cb)
return out, err
}
func (codec) Unmarshal(data []byte, v interface{}) error {
protoMsg := v.(proto.Message)
protoMsg.Reset()
if pu, ok := protoMsg.(proto.Unmarshaler); ok {
// object can unmarshal itself, no need for buffer
return pu.Unmarshal(data)
}
cb := protoBufferPool.Get().(*cachedProtoBuffer)
cb.SetBuf(data)
err := cb.Unmarshal(protoMsg)
cb.SetBuf(nil)
protoBufferPool.Put(cb)
return err
}
func (codec) Name() string {
return Name
}
var protoBufferPool = &sync.Pool{
New: func() interface{} {
return &cachedProtoBuffer{
Buffer: proto.Buffer{},
lastMarshaledSize: 16,
}
},
}

41
vendor/google.golang.org/grpc/go16.go generated vendored
View File

@ -25,12 +25,11 @@ import (
"io"
"net"
"net/http"
"os"
"golang.org/x/net/context"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/internal/transport"
"google.golang.org/grpc/status"
"google.golang.org/grpc/transport"
)
// dialContext connects to the address on the named network.
@ -48,12 +47,16 @@ func sendHTTPRequest(ctx context.Context, req *http.Request, conn net.Conn) erro
// toRPCErr converts an error into an error from the status package.
func toRPCErr(err error) error {
if err == nil || err == io.EOF {
return err
}
if err == io.ErrUnexpectedEOF {
return status.Error(codes.Internal, err.Error())
}
if _, ok := status.FromError(err); ok {
return err
}
switch e := err.(type) {
case transport.StreamError:
return status.Error(e.Code, e.Desc)
case transport.ConnectionError:
return status.Error(codes.Unavailable, e.Desc)
default:
@ -62,37 +65,7 @@ func toRPCErr(err error) error {
return status.Error(codes.DeadlineExceeded, err.Error())
case context.Canceled:
return status.Error(codes.Canceled, err.Error())
case ErrClientConnClosing:
return status.Error(codes.FailedPrecondition, err.Error())
}
}
return status.Error(codes.Unknown, err.Error())
}
// convertCode converts a standard Go error into its canonical code. Note that
// this is only used to translate the error returned by the server applications.
func convertCode(err error) codes.Code {
switch err {
case nil:
return codes.OK
case io.EOF:
return codes.OutOfRange
case io.ErrClosedPipe, io.ErrNoProgress, io.ErrShortBuffer, io.ErrShortWrite, io.ErrUnexpectedEOF:
return codes.FailedPrecondition
case os.ErrInvalid:
return codes.InvalidArgument
case context.Canceled:
return codes.Canceled
case context.DeadlineExceeded:
return codes.DeadlineExceeded
}
switch {
case os.IsExist(err):
return codes.AlreadyExists
case os.IsNotExist(err):
return codes.NotFound
case os.IsPermission(err):
return codes.PermissionDenied
}
return codes.Unknown
}

44
vendor/google.golang.org/grpc/go17.go generated vendored
View File

@ -22,15 +22,15 @@ package grpc
import (
"context"
"fmt"
"io"
"net"
"net/http"
"os"
netctx "golang.org/x/net/context"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/internal/transport"
"google.golang.org/grpc/status"
"google.golang.org/grpc/transport"
)
// dialContext connects to the address on the named network.
@ -41,19 +41,23 @@ func dialContext(ctx context.Context, network, address string) (net.Conn, error)
func sendHTTPRequest(ctx context.Context, req *http.Request, conn net.Conn) error {
req = req.WithContext(ctx)
if err := req.Write(conn); err != nil {
return err
return fmt.Errorf("failed to write the HTTP request: %v", err)
}
return nil
}
// toRPCErr converts an error into an error from the status package.
func toRPCErr(err error) error {
if err == nil || err == io.EOF {
return err
}
if err == io.ErrUnexpectedEOF {
return status.Error(codes.Internal, err.Error())
}
if _, ok := status.FromError(err); ok {
return err
}
switch e := err.(type) {
case transport.StreamError:
return status.Error(e.Code, e.Desc)
case transport.ConnectionError:
return status.Error(codes.Unavailable, e.Desc)
default:
@ -62,37 +66,7 @@ func toRPCErr(err error) error {
return status.Error(codes.DeadlineExceeded, err.Error())
case context.Canceled, netctx.Canceled:
return status.Error(codes.Canceled, err.Error())
case ErrClientConnClosing:
return status.Error(codes.FailedPrecondition, err.Error())
}
}
return status.Error(codes.Unknown, err.Error())
}
// convertCode converts a standard Go error into its canonical code. Note that
// this is only used to translate the error returned by the server applications.
func convertCode(err error) codes.Code {
switch err {
case nil:
return codes.OK
case io.EOF:
return codes.OutOfRange
case io.ErrClosedPipe, io.ErrNoProgress, io.ErrShortBuffer, io.ErrShortWrite, io.ErrUnexpectedEOF:
return codes.FailedPrecondition
case os.ErrInvalid:
return codes.InvalidArgument
case context.Canceled, netctx.Canceled:
return codes.Canceled
case context.DeadlineExceeded, netctx.DeadlineExceeded:
return codes.DeadlineExceeded
}
switch {
case os.IsExist(err):
return codes.AlreadyExists
case os.IsNotExist(err):
return codes.NotFound
case os.IsPermission(err):
return codes.PermissionDenied
}
return codes.Unknown
}

737
vendor/google.golang.org/grpc/grpclb.go generated vendored
View File

@ -1,737 +0,0 @@
/*
*
* Copyright 2016 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package grpc
import (
"errors"
"fmt"
"math/rand"
"net"
"sync"
"time"
"golang.org/x/net/context"
"google.golang.org/grpc/codes"
lbpb "google.golang.org/grpc/grpclb/grpc_lb_v1"
"google.golang.org/grpc/grpclog"
"google.golang.org/grpc/metadata"
"google.golang.org/grpc/naming"
)
// Client API for LoadBalancer service.
// Mostly copied from generated pb.go file.
// To avoid circular dependency.
type loadBalancerClient struct {
cc *ClientConn
}
func (c *loadBalancerClient) BalanceLoad(ctx context.Context, opts ...CallOption) (*balanceLoadClientStream, error) {
desc := &StreamDesc{
StreamName: "BalanceLoad",
ServerStreams: true,
ClientStreams: true,
}
stream, err := NewClientStream(ctx, desc, c.cc, "/grpc.lb.v1.LoadBalancer/BalanceLoad", opts...)
if err != nil {
return nil, err
}
x := &balanceLoadClientStream{stream}
return x, nil
}
type balanceLoadClientStream struct {
ClientStream
}
func (x *balanceLoadClientStream) Send(m *lbpb.LoadBalanceRequest) error {
return x.ClientStream.SendMsg(m)
}
func (x *balanceLoadClientStream) Recv() (*lbpb.LoadBalanceResponse, error) {
m := new(lbpb.LoadBalanceResponse)
if err := x.ClientStream.RecvMsg(m); err != nil {
return nil, err
}
return m, nil
}
// NewGRPCLBBalancer creates a grpclb load balancer.
func NewGRPCLBBalancer(r naming.Resolver) Balancer {
return &balancer{
r: r,
}
}
type remoteBalancerInfo struct {
addr string
// the server name used for authentication with the remote LB server.
name string
}
// grpclbAddrInfo consists of the information of a backend server.
type grpclbAddrInfo struct {
addr Address
connected bool
// dropForRateLimiting indicates whether this particular request should be
// dropped by the client for rate limiting.
dropForRateLimiting bool
// dropForLoadBalancing indicates whether this particular request should be
// dropped by the client for load balancing.
dropForLoadBalancing bool
}
type balancer struct {
r naming.Resolver
target string
mu sync.Mutex
seq int // a sequence number to make sure addrCh does not get stale addresses.
w naming.Watcher
addrCh chan []Address
rbs []remoteBalancerInfo
addrs []*grpclbAddrInfo
next int
waitCh chan struct{}
done bool
expTimer *time.Timer
rand *rand.Rand
clientStats lbpb.ClientStats
}
func (b *balancer) watchAddrUpdates(w naming.Watcher, ch chan []remoteBalancerInfo) error {
updates, err := w.Next()
if err != nil {
grpclog.Warningf("grpclb: failed to get next addr update from watcher: %v", err)
return err
}
b.mu.Lock()
defer b.mu.Unlock()
if b.done {
return ErrClientConnClosing
}
for _, update := range updates {
switch update.Op {
case naming.Add:
var exist bool
for _, v := range b.rbs {
// TODO: Is the same addr with different server name a different balancer?
if update.Addr == v.addr {
exist = true
break
}
}
if exist {
continue
}
md, ok := update.Metadata.(*naming.AddrMetadataGRPCLB)
if !ok {
// TODO: Revisit the handling here and may introduce some fallback mechanism.
grpclog.Errorf("The name resolution contains unexpected metadata %v", update.Metadata)
continue
}
switch md.AddrType {
case naming.Backend:
// TODO: Revisit the handling here and may introduce some fallback mechanism.
grpclog.Errorf("The name resolution does not give grpclb addresses")
continue
case naming.GRPCLB:
b.rbs = append(b.rbs, remoteBalancerInfo{
addr: update.Addr,
name: md.ServerName,
})
default:
grpclog.Errorf("Received unknow address type %d", md.AddrType)
continue
}
case naming.Delete:
for i, v := range b.rbs {
if update.Addr == v.addr {
copy(b.rbs[i:], b.rbs[i+1:])
b.rbs = b.rbs[:len(b.rbs)-1]
break
}
}
default:
grpclog.Errorf("Unknown update.Op %v", update.Op)
}
}
// TODO: Fall back to the basic round-robin load balancing if the resulting address is
// not a load balancer.
select {
case <-ch:
default:
}
ch <- b.rbs
return nil
}
func (b *balancer) serverListExpire(seq int) {
b.mu.Lock()
defer b.mu.Unlock()
// TODO: gRPC interanls do not clear the connections when the server list is stale.
// This means RPCs will keep using the existing server list until b receives new
// server list even though the list is expired. Revisit this behavior later.
if b.done || seq < b.seq {
return
}
b.next = 0
b.addrs = nil
// Ask grpc internals to close all the corresponding connections.
b.addrCh <- nil
}
func convertDuration(d *lbpb.Duration) time.Duration {
if d == nil {
return 0
}
return time.Duration(d.Seconds)*time.Second + time.Duration(d.Nanos)*time.Nanosecond
}
func (b *balancer) processServerList(l *lbpb.ServerList, seq int) {
if l == nil {
return
}
servers := l.GetServers()
expiration := convertDuration(l.GetExpirationInterval())
var (
sl []*grpclbAddrInfo
addrs []Address
)
for _, s := range servers {
md := metadata.Pairs("lb-token", s.LoadBalanceToken)
ip := net.IP(s.IpAddress)
ipStr := ip.String()
if ip.To4() == nil {
// Add square brackets to ipv6 addresses, otherwise net.Dial() and
// net.SplitHostPort() will return too many colons error.
ipStr = fmt.Sprintf("[%s]", ipStr)
}
addr := Address{
Addr: fmt.Sprintf("%s:%d", ipStr, s.Port),
Metadata: &md,
}
sl = append(sl, &grpclbAddrInfo{
addr: addr,
dropForRateLimiting: s.DropForRateLimiting,
dropForLoadBalancing: s.DropForLoadBalancing,
})
addrs = append(addrs, addr)
}
b.mu.Lock()
defer b.mu.Unlock()
if b.done || seq < b.seq {
return
}
if len(sl) > 0 {
// reset b.next to 0 when replacing the server list.
b.next = 0
b.addrs = sl
b.addrCh <- addrs
if b.expTimer != nil {
b.expTimer.Stop()
b.expTimer = nil
}
if expiration > 0 {
b.expTimer = time.AfterFunc(expiration, func() {
b.serverListExpire(seq)
})
}
}
return
}
func (b *balancer) sendLoadReport(s *balanceLoadClientStream, interval time.Duration, done <-chan struct{}) {
ticker := time.NewTicker(interval)
defer ticker.Stop()
for {
select {
case <-ticker.C:
case <-done:
return
}
b.mu.Lock()
stats := b.clientStats
b.clientStats = lbpb.ClientStats{} // Clear the stats.
b.mu.Unlock()
t := time.Now()
stats.Timestamp = &lbpb.Timestamp{
Seconds: t.Unix(),
Nanos: int32(t.Nanosecond()),
}
if err := s.Send(&lbpb.LoadBalanceRequest{
LoadBalanceRequestType: &lbpb.LoadBalanceRequest_ClientStats{
ClientStats: &stats,
},
}); err != nil {
grpclog.Errorf("grpclb: failed to send load report: %v", err)
return
}
}
}
func (b *balancer) callRemoteBalancer(lbc *loadBalancerClient, seq int) (retry bool) {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
stream, err := lbc.BalanceLoad(ctx)
if err != nil {
grpclog.Errorf("grpclb: failed to perform RPC to the remote balancer %v", err)
return
}
b.mu.Lock()
if b.done {
b.mu.Unlock()
return
}
b.mu.Unlock()
initReq := &lbpb.LoadBalanceRequest{
LoadBalanceRequestType: &lbpb.LoadBalanceRequest_InitialRequest{
InitialRequest: &lbpb.InitialLoadBalanceRequest{
Name: b.target,
},
},
}
if err := stream.Send(initReq); err != nil {
grpclog.Errorf("grpclb: failed to send init request: %v", err)
// TODO: backoff on retry?
return true
}
reply, err := stream.Recv()
if err != nil {
grpclog.Errorf("grpclb: failed to recv init response: %v", err)
// TODO: backoff on retry?
return true
}
initResp := reply.GetInitialResponse()
if initResp == nil {
grpclog.Errorf("grpclb: reply from remote balancer did not include initial response.")
return
}
// TODO: Support delegation.
if initResp.LoadBalancerDelegate != "" {
// delegation
grpclog.Errorf("TODO: Delegation is not supported yet.")
return
}
streamDone := make(chan struct{})
defer close(streamDone)
b.mu.Lock()
b.clientStats = lbpb.ClientStats{} // Clear client stats.
b.mu.Unlock()
if d := convertDuration(initResp.ClientStatsReportInterval); d > 0 {
go b.sendLoadReport(stream, d, streamDone)
}
// Retrieve the server list.
for {
reply, err := stream.Recv()
if err != nil {
grpclog.Errorf("grpclb: failed to recv server list: %v", err)
break
}
b.mu.Lock()
if b.done || seq < b.seq {
b.mu.Unlock()
return
}
b.seq++ // tick when receiving a new list of servers.
seq = b.seq
b.mu.Unlock()
if serverList := reply.GetServerList(); serverList != nil {
b.processServerList(serverList, seq)
}
}
return true
}
func (b *balancer) Start(target string, config BalancerConfig) error {
b.rand = rand.New(rand.NewSource(time.Now().Unix()))
// TODO: Fall back to the basic direct connection if there is no name resolver.
if b.r == nil {
return errors.New("there is no name resolver installed")
}
b.target = target
b.mu.Lock()
if b.done {
b.mu.Unlock()
return ErrClientConnClosing
}
b.addrCh = make(chan []Address)
w, err := b.r.Resolve(target)
if err != nil {
b.mu.Unlock()
grpclog.Errorf("grpclb: failed to resolve address: %v, err: %v", target, err)
return err
}
b.w = w
b.mu.Unlock()
balancerAddrsCh := make(chan []remoteBalancerInfo, 1)
// Spawn a goroutine to monitor the name resolution of remote load balancer.
go func() {
for {
if err := b.watchAddrUpdates(w, balancerAddrsCh); err != nil {
grpclog.Warningf("grpclb: the naming watcher stops working due to %v.\n", err)
close(balancerAddrsCh)
return
}
}
}()
// Spawn a goroutine to talk to the remote load balancer.
go func() {
var (
cc *ClientConn
// ccError is closed when there is an error in the current cc.
// A new rb should be picked from rbs and connected.
ccError chan struct{}
rb *remoteBalancerInfo
rbs []remoteBalancerInfo
rbIdx int
)
defer func() {
if ccError != nil {
select {
case <-ccError:
default:
close(ccError)
}
}
if cc != nil {
cc.Close()
}
}()
for {
var ok bool
select {
case rbs, ok = <-balancerAddrsCh:
if !ok {
return
}
foundIdx := -1
if rb != nil {
for i, trb := range rbs {
if trb == *rb {
foundIdx = i
break
}
}
}
if foundIdx >= 0 {
if foundIdx >= 1 {
// Move the address in use to the beginning of the list.
b.rbs[0], b.rbs[foundIdx] = b.rbs[foundIdx], b.rbs[0]
rbIdx = 0
}
continue // If found, don't dial new cc.
} else if len(rbs) > 0 {
// Pick a random one from the list, instead of always using the first one.
if l := len(rbs); l > 1 && rb != nil {
tmpIdx := b.rand.Intn(l - 1)
b.rbs[0], b.rbs[tmpIdx] = b.rbs[tmpIdx], b.rbs[0]
}
rbIdx = 0
rb = &rbs[0]
} else {
// foundIdx < 0 && len(rbs) <= 0.
rb = nil
}
case <-ccError:
ccError = nil
if rbIdx < len(rbs)-1 {
rbIdx++
rb = &rbs[rbIdx]
} else {
rb = nil
}
}
if rb == nil {
continue
}
if cc != nil {
cc.Close()
}
// Talk to the remote load balancer to get the server list.
var (
err error
dopts []DialOption
)
if creds := config.DialCreds; creds != nil {
if rb.name != "" {
if err := creds.OverrideServerName(rb.name); err != nil {
grpclog.Warningf("grpclb: failed to override the server name in the credentials: %v", err)
continue
}
}
dopts = append(dopts, WithTransportCredentials(creds))
} else {
dopts = append(dopts, WithInsecure())
}
if dialer := config.Dialer; dialer != nil {
// WithDialer takes a different type of function, so we instead use a special DialOption here.
dopts = append(dopts, func(o *dialOptions) { o.copts.Dialer = dialer })
}
ccError = make(chan struct{})
cc, err = Dial(rb.addr, dopts...)
if err != nil {
grpclog.Warningf("grpclb: failed to setup a connection to the remote balancer %v: %v", rb.addr, err)
close(ccError)
continue
}
b.mu.Lock()
b.seq++ // tick when getting a new balancer address
seq := b.seq
b.next = 0
b.mu.Unlock()
go func(cc *ClientConn, ccError chan struct{}) {
lbc := &loadBalancerClient{cc}
b.callRemoteBalancer(lbc, seq)
cc.Close()
select {
case <-ccError:
default:
close(ccError)
}
}(cc, ccError)
}
}()
return nil
}
func (b *balancer) down(addr Address, err error) {
b.mu.Lock()
defer b.mu.Unlock()
for _, a := range b.addrs {
if addr == a.addr {
a.connected = false
break
}
}
}
func (b *balancer) Up(addr Address) func(error) {
b.mu.Lock()
defer b.mu.Unlock()
if b.done {
return nil
}
var cnt int
for _, a := range b.addrs {
if a.addr == addr {
if a.connected {
return nil
}
a.connected = true
}
if a.connected && !a.dropForRateLimiting && !a.dropForLoadBalancing {
cnt++
}
}
// addr is the only one which is connected. Notify the Get() callers who are blocking.
if cnt == 1 && b.waitCh != nil {
close(b.waitCh)
b.waitCh = nil
}
return func(err error) {
b.down(addr, err)
}
}
func (b *balancer) Get(ctx context.Context, opts BalancerGetOptions) (addr Address, put func(), err error) {
var ch chan struct{}
b.mu.Lock()
if b.done {
b.mu.Unlock()
err = ErrClientConnClosing
return
}
seq := b.seq
defer func() {
if err != nil {
return
}
put = func() {
s, ok := rpcInfoFromContext(ctx)
if !ok {
return
}
b.mu.Lock()
defer b.mu.Unlock()
if b.done || seq < b.seq {
return
}
b.clientStats.NumCallsFinished++
if !s.bytesSent {
b.clientStats.NumCallsFinishedWithClientFailedToSend++
} else if s.bytesReceived {
b.clientStats.NumCallsFinishedKnownReceived++
}
}
}()
b.clientStats.NumCallsStarted++
if len(b.addrs) > 0 {
if b.next >= len(b.addrs) {
b.next = 0
}
next := b.next
for {
a := b.addrs[next]
next = (next + 1) % len(b.addrs)
if a.connected {
if !a.dropForRateLimiting && !a.dropForLoadBalancing {
addr = a.addr
b.next = next
b.mu.Unlock()
return
}
if !opts.BlockingWait {
b.next = next
if a.dropForLoadBalancing {
b.clientStats.NumCallsFinished++
b.clientStats.NumCallsFinishedWithDropForLoadBalancing++
} else if a.dropForRateLimiting {
b.clientStats.NumCallsFinished++
b.clientStats.NumCallsFinishedWithDropForRateLimiting++
}
b.mu.Unlock()
err = Errorf(codes.Unavailable, "%s drops requests", a.addr.Addr)
return
}
}
if next == b.next {
// Has iterated all the possible address but none is connected.
break
}
}
}
if !opts.BlockingWait {
if len(b.addrs) == 0 {
b.clientStats.NumCallsFinished++
b.clientStats.NumCallsFinishedWithClientFailedToSend++
b.mu.Unlock()
err = Errorf(codes.Unavailable, "there is no address available")
return
}
// Returns the next addr on b.addrs for a failfast RPC.
addr = b.addrs[b.next].addr
b.next++
b.mu.Unlock()
return
}
// Wait on b.waitCh for non-failfast RPCs.
if b.waitCh == nil {
ch = make(chan struct{})
b.waitCh = ch
} else {
ch = b.waitCh
}
b.mu.Unlock()
for {
select {
case <-ctx.Done():
b.mu.Lock()
b.clientStats.NumCallsFinished++
b.clientStats.NumCallsFinishedWithClientFailedToSend++
b.mu.Unlock()
err = ctx.Err()
return
case <-ch:
b.mu.Lock()
if b.done {
b.clientStats.NumCallsFinished++
b.clientStats.NumCallsFinishedWithClientFailedToSend++
b.mu.Unlock()
err = ErrClientConnClosing
return
}
if len(b.addrs) > 0 {
if b.next >= len(b.addrs) {
b.next = 0
}
next := b.next
for {
a := b.addrs[next]
next = (next + 1) % len(b.addrs)
if a.connected {
if !a.dropForRateLimiting && !a.dropForLoadBalancing {
addr = a.addr
b.next = next
b.mu.Unlock()
return
}
if !opts.BlockingWait {
b.next = next
if a.dropForLoadBalancing {
b.clientStats.NumCallsFinished++
b.clientStats.NumCallsFinishedWithDropForLoadBalancing++
} else if a.dropForRateLimiting {
b.clientStats.NumCallsFinished++
b.clientStats.NumCallsFinishedWithDropForRateLimiting++
}
b.mu.Unlock()
err = Errorf(codes.Unavailable, "drop requests for the addreess %s", a.addr.Addr)
return
}
}
if next == b.next {
// Has iterated all the possible address but none is connected.
break
}
}
}
// The newly added addr got removed by Down() again.
if b.waitCh == nil {
ch = make(chan struct{})
b.waitCh = ch
} else {
ch = b.waitCh
}
b.mu.Unlock()
}
}
}
func (b *balancer) Notify() <-chan []Address {
return b.addrCh
}
func (b *balancer) Close() error {
b.mu.Lock()
defer b.mu.Unlock()
if b.done {
return errBalancerClosed
}
b.done = true
if b.expTimer != nil {
b.expTimer.Stop()
}
if b.waitCh != nil {
close(b.waitCh)
}
if b.addrCh != nil {
close(b.addrCh)
}
if b.w != nil {
b.w.Close()
}
return nil
}

629
vendor/google.golang.org/grpc/grpclb/grpc_lb_v1/grpclb.pb.go generated vendored
View File

@ -1,629 +0,0 @@
// Code generated by protoc-gen-go.
// source: grpclb.proto
// DO NOT EDIT!
/*
Package grpc_lb_v1 is a generated protocol buffer package.
It is generated from these files:
grpclb.proto
It has these top-level messages:
Duration
Timestamp
LoadBalanceRequest
InitialLoadBalanceRequest
ClientStats
LoadBalanceResponse
InitialLoadBalanceResponse
ServerList
Server
*/
package grpc_lb_v1
import proto "github.com/golang/protobuf/proto"
import fmt "fmt"
import math "math"
// Reference imports to suppress errors if they are not otherwise used.
var _ = proto.Marshal
var _ = fmt.Errorf
var _ = math.Inf
// This is a compile-time assertion to ensure that this generated file
// is compatible with the proto package it is being compiled against.
// A compilation error at this line likely means your copy of the
// proto package needs to be updated.
const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
type Duration struct {
// Signed seconds of the span of time. Must be from -315,576,000,000
// to +315,576,000,000 inclusive.
Seconds int64 `protobuf:"varint,1,opt,name=seconds" json:"seconds,omitempty"`
// Signed fractions of a second at nanosecond resolution of the span
// of time. Durations less than one second are represented with a 0
// `seconds` field and a positive or negative `nanos` field. For durations
// of one second or more, a non-zero value for the `nanos` field must be
// of the same sign as the `seconds` field. Must be from -999,999,999
// to +999,999,999 inclusive.
Nanos int32 `protobuf:"varint,2,opt,name=nanos" json:"nanos,omitempty"`
}
func (m *Duration) Reset() { *m = Duration{} }
func (m *Duration) String() string { return proto.CompactTextString(m) }
func (*Duration) ProtoMessage() {}
func (*Duration) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{0} }
func (m *Duration) GetSeconds() int64 {
if m != nil {
return m.Seconds
}
return 0
}
func (m *Duration) GetNanos() int32 {
if m != nil {
return m.Nanos
}
return 0
}
type Timestamp struct {
// Represents seconds of UTC time since Unix epoch
// 1970-01-01T00:00:00Z. Must be from 0001-01-01T00:00:00Z to
// 9999-12-31T23:59:59Z inclusive.
Seconds int64 `protobuf:"varint,1,opt,name=seconds" json:"seconds,omitempty"`
// Non-negative fractions of a second at nanosecond resolution. Negative
// second values with fractions must still have non-negative nanos values
// that count forward in time. Must be from 0 to 999,999,999
// inclusive.
Nanos int32 `protobuf:"varint,2,opt,name=nanos" json:"nanos,omitempty"`
}
func (m *Timestamp) Reset() { *m = Timestamp{} }
func (m *Timestamp) String() string { return proto.CompactTextString(m) }
func (*Timestamp) ProtoMessage() {}
func (*Timestamp) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{1} }
func (m *Timestamp) GetSeconds() int64 {
if m != nil {
return m.Seconds
}
return 0
}
func (m *Timestamp) GetNanos() int32 {
if m != nil {
return m.Nanos
}
return 0
}
type LoadBalanceRequest struct {
// Types that are valid to be assigned to LoadBalanceRequestType:
// *LoadBalanceRequest_InitialRequest
// *LoadBalanceRequest_ClientStats
LoadBalanceRequestType isLoadBalanceRequest_LoadBalanceRequestType `protobuf_oneof:"load_balance_request_type"`
}
func (m *LoadBalanceRequest) Reset() { *m = LoadBalanceRequest{} }
func (m *LoadBalanceRequest) String() string { return proto.CompactTextString(m) }
func (*LoadBalanceRequest) ProtoMessage() {}
func (*LoadBalanceRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{2} }
type isLoadBalanceRequest_LoadBalanceRequestType interface {
isLoadBalanceRequest_LoadBalanceRequestType()
}
type LoadBalanceRequest_InitialRequest struct {
InitialRequest *InitialLoadBalanceRequest `protobuf:"bytes,1,opt,name=initial_request,json=initialRequest,oneof"`
}
type LoadBalanceRequest_ClientStats struct {
ClientStats *ClientStats `protobuf:"bytes,2,opt,name=client_stats,json=clientStats,oneof"`
}
func (*LoadBalanceRequest_InitialRequest) isLoadBalanceRequest_LoadBalanceRequestType() {}
func (*LoadBalanceRequest_ClientStats) isLoadBalanceRequest_LoadBalanceRequestType() {}
func (m *LoadBalanceRequest) GetLoadBalanceRequestType() isLoadBalanceRequest_LoadBalanceRequestType {
if m != nil {
return m.LoadBalanceRequestType
}
return nil
}
func (m *LoadBalanceRequest) GetInitialRequest() *InitialLoadBalanceRequest {
if x, ok := m.GetLoadBalanceRequestType().(*LoadBalanceRequest_InitialRequest); ok {
return x.InitialRequest
}
return nil
}
func (m *LoadBalanceRequest) GetClientStats() *ClientStats {
if x, ok := m.GetLoadBalanceRequestType().(*LoadBalanceRequest_ClientStats); ok {
return x.ClientStats
}
return nil
}
// XXX_OneofFuncs is for the internal use of the proto package.
func (*LoadBalanceRequest) XXX_OneofFuncs() (func(msg proto.Message, b *proto.Buffer) error, func(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error), func(msg proto.Message) (n int), []interface{}) {
return _LoadBalanceRequest_OneofMarshaler, _LoadBalanceRequest_OneofUnmarshaler, _LoadBalanceRequest_OneofSizer, []interface{}{
(*LoadBalanceRequest_InitialRequest)(nil),
(*LoadBalanceRequest_ClientStats)(nil),
}
}
func _LoadBalanceRequest_OneofMarshaler(msg proto.Message, b *proto.Buffer) error {
m := msg.(*LoadBalanceRequest)
// load_balance_request_type
switch x := m.LoadBalanceRequestType.(type) {
case *LoadBalanceRequest_InitialRequest:
b.EncodeVarint(1<<3 | proto.WireBytes)
if err := b.EncodeMessage(x.InitialRequest); err != nil {
return err
}
case *LoadBalanceRequest_ClientStats:
b.EncodeVarint(2<<3 | proto.WireBytes)
if err := b.EncodeMessage(x.ClientStats); err != nil {
return err
}
case nil:
default:
return fmt.Errorf("LoadBalanceRequest.LoadBalanceRequestType has unexpected type %T", x)
}
return nil
}
func _LoadBalanceRequest_OneofUnmarshaler(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error) {
m := msg.(*LoadBalanceRequest)
switch tag {
case 1: // load_balance_request_type.initial_request
if wire != proto.WireBytes {
return true, proto.ErrInternalBadWireType
}
msg := new(InitialLoadBalanceRequest)
err := b.DecodeMessage(msg)
m.LoadBalanceRequestType = &LoadBalanceRequest_InitialRequest{msg}
return true, err
case 2: // load_balance_request_type.client_stats
if wire != proto.WireBytes {
return true, proto.ErrInternalBadWireType
}
msg := new(ClientStats)
err := b.DecodeMessage(msg)
m.LoadBalanceRequestType = &LoadBalanceRequest_ClientStats{msg}
return true, err
default:
return false, nil
}
}
func _LoadBalanceRequest_OneofSizer(msg proto.Message) (n int) {
m := msg.(*LoadBalanceRequest)
// load_balance_request_type
switch x := m.LoadBalanceRequestType.(type) {
case *LoadBalanceRequest_InitialRequest:
s := proto.Size(x.InitialRequest)
n += proto.SizeVarint(1<<3 | proto.WireBytes)
n += proto.SizeVarint(uint64(s))
n += s
case *LoadBalanceRequest_ClientStats:
s := proto.Size(x.ClientStats)
n += proto.SizeVarint(2<<3 | proto.WireBytes)
n += proto.SizeVarint(uint64(s))
n += s
case nil:
default:
panic(fmt.Sprintf("proto: unexpected type %T in oneof", x))
}
return n
}
type InitialLoadBalanceRequest struct {
// Name of load balanced service (IE, balancer.service.com)
// length should be less than 256 bytes.
Name string `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
}
func (m *InitialLoadBalanceRequest) Reset() { *m = InitialLoadBalanceRequest{} }
func (m *InitialLoadBalanceRequest) String() string { return proto.CompactTextString(m) }
func (*InitialLoadBalanceRequest) ProtoMessage() {}
func (*InitialLoadBalanceRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{3} }
func (m *InitialLoadBalanceRequest) GetName() string {
if m != nil {
return m.Name
}
return ""
}
// Contains client level statistics that are useful to load balancing. Each
// count except the timestamp should be reset to zero after reporting the stats.
type ClientStats struct {
// The timestamp of generating the report.
Timestamp *Timestamp `protobuf:"bytes,1,opt,name=timestamp" json:"timestamp,omitempty"`
// The total number of RPCs that started.
NumCallsStarted int64 `protobuf:"varint,2,opt,name=num_calls_started,json=numCallsStarted" json:"num_calls_started,omitempty"`
// The total number of RPCs that finished.
NumCallsFinished int64 `protobuf:"varint,3,opt,name=num_calls_finished,json=numCallsFinished" json:"num_calls_finished,omitempty"`
// The total number of RPCs that were dropped by the client because of rate
// limiting.
NumCallsFinishedWithDropForRateLimiting int64 `protobuf:"varint,4,opt,name=num_calls_finished_with_drop_for_rate_limiting,json=numCallsFinishedWithDropForRateLimiting" json:"num_calls_finished_with_drop_for_rate_limiting,omitempty"`
// The total number of RPCs that were dropped by the client because of load
// balancing.
NumCallsFinishedWithDropForLoadBalancing int64 `protobuf:"varint,5,opt,name=num_calls_finished_with_drop_for_load_balancing,json=numCallsFinishedWithDropForLoadBalancing" json:"num_calls_finished_with_drop_for_load_balancing,omitempty"`
// The total number of RPCs that failed to reach a server except dropped RPCs.
NumCallsFinishedWithClientFailedToSend int64 `protobuf:"varint,6,opt,name=num_calls_finished_with_client_failed_to_send,json=numCallsFinishedWithClientFailedToSend" json:"num_calls_finished_with_client_failed_to_send,omitempty"`
// The total number of RPCs that finished and are known to have been received
// by a server.
NumCallsFinishedKnownReceived int64 `protobuf:"varint,7,opt,name=num_calls_finished_known_received,json=numCallsFinishedKnownReceived" json:"num_calls_finished_known_received,omitempty"`
}
func (m *ClientStats) Reset() { *m = ClientStats{} }
func (m *ClientStats) String() string { return proto.CompactTextString(m) }
func (*ClientStats) ProtoMessage() {}
func (*ClientStats) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{4} }
func (m *ClientStats) GetTimestamp() *Timestamp {
if m != nil {
return m.Timestamp
}
return nil
}
func (m *ClientStats) GetNumCallsStarted() int64 {
if m != nil {
return m.NumCallsStarted
}
return 0
}
func (m *ClientStats) GetNumCallsFinished() int64 {
if m != nil {
return m.NumCallsFinished
}
return 0
}
func (m *ClientStats) GetNumCallsFinishedWithDropForRateLimiting() int64 {
if m != nil {
return m.NumCallsFinishedWithDropForRateLimiting
}
return 0
}
func (m *ClientStats) GetNumCallsFinishedWithDropForLoadBalancing() int64 {
if m != nil {
return m.NumCallsFinishedWithDropForLoadBalancing
}
return 0
}
func (m *ClientStats) GetNumCallsFinishedWithClientFailedToSend() int64 {
if m != nil {
return m.NumCallsFinishedWithClientFailedToSend
}
return 0
}
func (m *ClientStats) GetNumCallsFinishedKnownReceived() int64 {
if m != nil {
return m.NumCallsFinishedKnownReceived
}
return 0
}
type LoadBalanceResponse struct {
// Types that are valid to be assigned to LoadBalanceResponseType:
// *LoadBalanceResponse_InitialResponse
// *LoadBalanceResponse_ServerList
LoadBalanceResponseType isLoadBalanceResponse_LoadBalanceResponseType `protobuf_oneof:"load_balance_response_type"`
}
func (m *LoadBalanceResponse) Reset() { *m = LoadBalanceResponse{} }
func (m *LoadBalanceResponse) String() string { return proto.CompactTextString(m) }
func (*LoadBalanceResponse) ProtoMessage() {}
func (*LoadBalanceResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{5} }
type isLoadBalanceResponse_LoadBalanceResponseType interface {
isLoadBalanceResponse_LoadBalanceResponseType()
}
type LoadBalanceResponse_InitialResponse struct {
InitialResponse *InitialLoadBalanceResponse `protobuf:"bytes,1,opt,name=initial_response,json=initialResponse,oneof"`
}
type LoadBalanceResponse_ServerList struct {
ServerList *ServerList `protobuf:"bytes,2,opt,name=server_list,json=serverList,oneof"`
}
func (*LoadBalanceResponse_InitialResponse) isLoadBalanceResponse_LoadBalanceResponseType() {}
func (*LoadBalanceResponse_ServerList) isLoadBalanceResponse_LoadBalanceResponseType() {}
func (m *LoadBalanceResponse) GetLoadBalanceResponseType() isLoadBalanceResponse_LoadBalanceResponseType {
if m != nil {
return m.LoadBalanceResponseType
}
return nil
}
func (m *LoadBalanceResponse) GetInitialResponse() *InitialLoadBalanceResponse {
if x, ok := m.GetLoadBalanceResponseType().(*LoadBalanceResponse_InitialResponse); ok {
return x.InitialResponse
}
return nil
}
func (m *LoadBalanceResponse) GetServerList() *ServerList {
if x, ok := m.GetLoadBalanceResponseType().(*LoadBalanceResponse_ServerList); ok {
return x.ServerList
}
return nil
}
// XXX_OneofFuncs is for the internal use of the proto package.
func (*LoadBalanceResponse) XXX_OneofFuncs() (func(msg proto.Message, b *proto.Buffer) error, func(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error), func(msg proto.Message) (n int), []interface{}) {
return _LoadBalanceResponse_OneofMarshaler, _LoadBalanceResponse_OneofUnmarshaler, _LoadBalanceResponse_OneofSizer, []interface{}{
(*LoadBalanceResponse_InitialResponse)(nil),
(*LoadBalanceResponse_ServerList)(nil),
}
}
func _LoadBalanceResponse_OneofMarshaler(msg proto.Message, b *proto.Buffer) error {
m := msg.(*LoadBalanceResponse)
// load_balance_response_type
switch x := m.LoadBalanceResponseType.(type) {
case *LoadBalanceResponse_InitialResponse:
b.EncodeVarint(1<<3 | proto.WireBytes)
if err := b.EncodeMessage(x.InitialResponse); err != nil {
return err
}
case *LoadBalanceResponse_ServerList:
b.EncodeVarint(2<<3 | proto.WireBytes)
if err := b.EncodeMessage(x.ServerList); err != nil {
return err
}
case nil:
default:
return fmt.Errorf("LoadBalanceResponse.LoadBalanceResponseType has unexpected type %T", x)
}
return nil
}
func _LoadBalanceResponse_OneofUnmarshaler(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error) {
m := msg.(*LoadBalanceResponse)
switch tag {
case 1: // load_balance_response_type.initial_response
if wire != proto.WireBytes {
return true, proto.ErrInternalBadWireType
}
msg := new(InitialLoadBalanceResponse)
err := b.DecodeMessage(msg)
m.LoadBalanceResponseType = &LoadBalanceResponse_InitialResponse{msg}
return true, err
case 2: // load_balance_response_type.server_list
if wire != proto.WireBytes {
return true, proto.ErrInternalBadWireType
}
msg := new(ServerList)
err := b.DecodeMessage(msg)
m.LoadBalanceResponseType = &LoadBalanceResponse_ServerList{msg}
return true, err
default:
return false, nil
}
}
func _LoadBalanceResponse_OneofSizer(msg proto.Message) (n int) {
m := msg.(*LoadBalanceResponse)
// load_balance_response_type
switch x := m.LoadBalanceResponseType.(type) {
case *LoadBalanceResponse_InitialResponse:
s := proto.Size(x.InitialResponse)
n += proto.SizeVarint(1<<3 | proto.WireBytes)
n += proto.SizeVarint(uint64(s))
n += s
case *LoadBalanceResponse_ServerList:
s := proto.Size(x.ServerList)
n += proto.SizeVarint(2<<3 | proto.WireBytes)
n += proto.SizeVarint(uint64(s))
n += s
case nil:
default:
panic(fmt.Sprintf("proto: unexpected type %T in oneof", x))
}
return n
}
type InitialLoadBalanceResponse struct {
// This is an application layer redirect that indicates the client should use
// the specified server for load balancing. When this field is non-empty in
// the response, the client should open a separate connection to the
// load_balancer_delegate and call the BalanceLoad method. Its length should
// be less than 64 bytes.
LoadBalancerDelegate string `protobuf:"bytes,1,opt,name=load_balancer_delegate,json=loadBalancerDelegate" json:"load_balancer_delegate,omitempty"`
// This interval defines how often the client should send the client stats
// to the load balancer. Stats should only be reported when the duration is
// positive.
ClientStatsReportInterval *Duration `protobuf:"bytes,2,opt,name=client_stats_report_interval,json=clientStatsReportInterval" json:"client_stats_report_interval,omitempty"`
}
func (m *InitialLoadBalanceResponse) Reset() { *m = InitialLoadBalanceResponse{} }
func (m *InitialLoadBalanceResponse) String() string { return proto.CompactTextString(m) }
func (*InitialLoadBalanceResponse) ProtoMessage() {}
func (*InitialLoadBalanceResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{6} }
func (m *InitialLoadBalanceResponse) GetLoadBalancerDelegate() string {
if m != nil {
return m.LoadBalancerDelegate
}
return ""
}
func (m *InitialLoadBalanceResponse) GetClientStatsReportInterval() *Duration {
if m != nil {
return m.ClientStatsReportInterval
}
return nil
}
type ServerList struct {
// Contains a list of servers selected by the load balancer. The list will
// be updated when server resolutions change or as needed to balance load
// across more servers. The client should consume the server list in order
// unless instructed otherwise via the client_config.
Servers []*Server `protobuf:"bytes,1,rep,name=servers" json:"servers,omitempty"`
// Indicates the amount of time that the client should consider this server
// list as valid. It may be considered stale after waiting this interval of
// time after receiving the list. If the interval is not positive, the
// client can assume the list is valid until the next list is received.
ExpirationInterval *Duration `protobuf:"bytes,3,opt,name=expiration_interval,json=expirationInterval" json:"expiration_interval,omitempty"`
}
func (m *ServerList) Reset() { *m = ServerList{} }
func (m *ServerList) String() string { return proto.CompactTextString(m) }
func (*ServerList) ProtoMessage() {}
func (*ServerList) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{7} }
func (m *ServerList) GetServers() []*Server {
if m != nil {
return m.Servers
}
return nil
}
func (m *ServerList) GetExpirationInterval() *Duration {
if m != nil {
return m.ExpirationInterval
}
return nil
}
// Contains server information. When none of the [drop_for_*] fields are true,
// use the other fields. When drop_for_rate_limiting is true, ignore all other
// fields. Use drop_for_load_balancing only when it is true and
// drop_for_rate_limiting is false.
type Server struct {
// A resolved address for the server, serialized in network-byte-order. It may
// either be an IPv4 or IPv6 address.
IpAddress []byte `protobuf:"bytes,1,opt,name=ip_address,json=ipAddress,proto3" json:"ip_address,omitempty"`
// A resolved port number for the server.
Port int32 `protobuf:"varint,2,opt,name=port" json:"port,omitempty"`
// An opaque but printable token given to the frontend for each pick. All
// frontend requests for that pick must include the token in its initial
// metadata. The token is used by the backend to verify the request and to
// allow the backend to report load to the gRPC LB system.
//
// Its length is variable but less than 50 bytes.
LoadBalanceToken string `protobuf:"bytes,3,opt,name=load_balance_token,json=loadBalanceToken" json:"load_balance_token,omitempty"`
// Indicates whether this particular request should be dropped by the client
// for rate limiting.
DropForRateLimiting bool `protobuf:"varint,4,opt,name=drop_for_rate_limiting,json=dropForRateLimiting" json:"drop_for_rate_limiting,omitempty"`
// Indicates whether this particular request should be dropped by the client
// for load balancing.
DropForLoadBalancing bool `protobuf:"varint,5,opt,name=drop_for_load_balancing,json=dropForLoadBalancing" json:"drop_for_load_balancing,omitempty"`
}
func (m *Server) Reset() { *m = Server{} }
func (m *Server) String() string { return proto.CompactTextString(m) }
func (*Server) ProtoMessage() {}
func (*Server) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{8} }
func (m *Server) GetIpAddress() []byte {
if m != nil {
return m.IpAddress
}
return nil
}
func (m *Server) GetPort() int32 {
if m != nil {
return m.Port
}
return 0
}
func (m *Server) GetLoadBalanceToken() string {
if m != nil {
return m.LoadBalanceToken
}
return ""
}
func (m *Server) GetDropForRateLimiting() bool {
if m != nil {
return m.DropForRateLimiting
}
return false
}
func (m *Server) GetDropForLoadBalancing() bool {
if m != nil {
return m.DropForLoadBalancing
}
return false
}
func init() {
proto.RegisterType((*Duration)(nil), "grpc.lb.v1.Duration")
proto.RegisterType((*Timestamp)(nil), "grpc.lb.v1.Timestamp")
proto.RegisterType((*LoadBalanceRequest)(nil), "grpc.lb.v1.LoadBalanceRequest")
proto.RegisterType((*InitialLoadBalanceRequest)(nil), "grpc.lb.v1.InitialLoadBalanceRequest")
proto.RegisterType((*ClientStats)(nil), "grpc.lb.v1.ClientStats")
proto.RegisterType((*LoadBalanceResponse)(nil), "grpc.lb.v1.LoadBalanceResponse")
proto.RegisterType((*InitialLoadBalanceResponse)(nil), "grpc.lb.v1.InitialLoadBalanceResponse")
proto.RegisterType((*ServerList)(nil), "grpc.lb.v1.ServerList")
proto.RegisterType((*Server)(nil), "grpc.lb.v1.Server")
}
func init() { proto.RegisterFile("grpclb.proto", fileDescriptor0) }
var fileDescriptor0 = []byte{
// 733 bytes of a gzipped FileDescriptorProto
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0x0a, 0x00, 0x00, 0xff, 0xff, 0x64, 0xbf, 0xda, 0x5e, 0xce, 0x06, 0x00, 0x00,
}

164
vendor/google.golang.org/grpc/grpclb/grpc_lb_v1/grpclb.proto generated vendored
View File

@ -1,164 +0,0 @@
// Copyright 2016 gRPC authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
syntax = "proto3";
package grpc.lb.v1;
message Duration {
// Signed seconds of the span of time. Must be from -315,576,000,000
// to +315,576,000,000 inclusive.
int64 seconds = 1;
// Signed fractions of a second at nanosecond resolution of the span
// of time. Durations less than one second are represented with a 0
// `seconds` field and a positive or negative `nanos` field. For durations
// of one second or more, a non-zero value for the `nanos` field must be
// of the same sign as the `seconds` field. Must be from -999,999,999
// to +999,999,999 inclusive.
int32 nanos = 2;
}
message Timestamp {
// Represents seconds of UTC time since Unix epoch
// 1970-01-01T00:00:00Z. Must be from 0001-01-01T00:00:00Z to
// 9999-12-31T23:59:59Z inclusive.
int64 seconds = 1;
// Non-negative fractions of a second at nanosecond resolution. Negative
// second values with fractions must still have non-negative nanos values
// that count forward in time. Must be from 0 to 999,999,999
// inclusive.
int32 nanos = 2;
}
service LoadBalancer {
// Bidirectional rpc to get a list of servers.
rpc BalanceLoad(stream LoadBalanceRequest)
returns (stream LoadBalanceResponse);
}
message LoadBalanceRequest {
oneof load_balance_request_type {
// This message should be sent on the first request to the load balancer.
InitialLoadBalanceRequest initial_request = 1;
// The client stats should be periodically reported to the load balancer
// based on the duration defined in the InitialLoadBalanceResponse.
ClientStats client_stats = 2;
}
}
message InitialLoadBalanceRequest {
// Name of load balanced service (IE, balancer.service.com)
// length should be less than 256 bytes.
string name = 1;
}
// Contains client level statistics that are useful to load balancing. Each
// count except the timestamp should be reset to zero after reporting the stats.
message ClientStats {
// The timestamp of generating the report.
Timestamp timestamp = 1;
// The total number of RPCs that started.
int64 num_calls_started = 2;
// The total number of RPCs that finished.
int64 num_calls_finished = 3;
// The total number of RPCs that were dropped by the client because of rate
// limiting.
int64 num_calls_finished_with_drop_for_rate_limiting = 4;
// The total number of RPCs that were dropped by the client because of load
// balancing.
int64 num_calls_finished_with_drop_for_load_balancing = 5;
// The total number of RPCs that failed to reach a server except dropped RPCs.
int64 num_calls_finished_with_client_failed_to_send = 6;
// The total number of RPCs that finished and are known to have been received
// by a server.
int64 num_calls_finished_known_received = 7;
}
message LoadBalanceResponse {
oneof load_balance_response_type {
// This message should be sent on the first response to the client.
InitialLoadBalanceResponse initial_response = 1;
// Contains the list of servers selected by the load balancer. The client
// should send requests to these servers in the specified order.
ServerList server_list = 2;
}
}
message InitialLoadBalanceResponse {
// This is an application layer redirect that indicates the client should use
// the specified server for load balancing. When this field is non-empty in
// the response, the client should open a separate connection to the
// load_balancer_delegate and call the BalanceLoad method. Its length should
// be less than 64 bytes.
string load_balancer_delegate = 1;
// This interval defines how often the client should send the client stats
// to the load balancer. Stats should only be reported when the duration is
// positive.
Duration client_stats_report_interval = 2;
}
message ServerList {
// Contains a list of servers selected by the load balancer. The list will
// be updated when server resolutions change or as needed to balance load
// across more servers. The client should consume the server list in order
// unless instructed otherwise via the client_config.
repeated Server servers = 1;
// Indicates the amount of time that the client should consider this server
// list as valid. It may be considered stale after waiting this interval of
// time after receiving the list. If the interval is not positive, the
// client can assume the list is valid until the next list is received.
Duration expiration_interval = 3;
}
// Contains server information. When none of the [drop_for_*] fields are true,
// use the other fields. When drop_for_rate_limiting is true, ignore all other
// fields. Use drop_for_load_balancing only when it is true and
// drop_for_rate_limiting is false.
message Server {
// A resolved address for the server, serialized in network-byte-order. It may
// either be an IPv4 or IPv6 address.
bytes ip_address = 1;
// A resolved port number for the server.
int32 port = 2;
// An opaque but printable token given to the frontend for each pick. All
// frontend requests for that pick must include the token in its initial
// metadata. The token is used by the backend to verify the request and to
// allow the backend to report load to the gRPC LB system.
//
// Its length is variable but less than 50 bytes.
string load_balance_token = 3;
// Indicates whether this particular request should be dropped by the client
// for rate limiting.
bool drop_for_rate_limiting = 4;
// Indicates whether this particular request should be dropped by the client
// for load balancing.
bool drop_for_load_balancing = 5;
}

3
vendor/google.golang.org/grpc/grpclog/grpclog.go generated vendored
View File

@ -105,18 +105,21 @@ func Fatalln(args ...interface{}) {
}
// Print prints to the logger. Arguments are handled in the manner of fmt.Print.
//
// Deprecated: use Info.
func Print(args ...interface{}) {
logger.Info(args...)
}
// Printf prints to the logger. Arguments are handled in the manner of fmt.Printf.
//
// Deprecated: use Infof.
func Printf(format string, args ...interface{}) {
logger.Infof(format, args...)
}
// Println prints to the logger. Arguments are handled in the manner of fmt.Println.
//
// Deprecated: use Infoln.
func Println(args ...interface{}) {
logger.Infoln(args...)

2
vendor/google.golang.org/grpc/grpclog/logger.go generated vendored
View File

@ -19,6 +19,7 @@
package grpclog
// Logger mimics golang's standard Logger as an interface.
//
// Deprecated: use LoggerV2.
type Logger interface {
Fatal(args ...interface{})
@ -31,6 +32,7 @@ type Logger interface {
// SetLogger sets the logger that is used in grpc. Call only from
// init() functions.
//
// Deprecated: use SetLoggerV2.
func SetLogger(l Logger) {
logger = &loggerWrapper{Logger: l}

145
vendor/google.golang.org/grpc/health/grpc_health_v1/health.pb.go generated vendored
View File

@ -1,18 +1,7 @@
// Code generated by protoc-gen-go.
// source: health.proto
// DO NOT EDIT!
// Code generated by protoc-gen-go. DO NOT EDIT.
// source: grpc/health/v1/health.proto
/*
Package grpc_health_v1 is a generated protocol buffer package.
It is generated from these files:
health.proto
It has these top-level messages:
HealthCheckRequest
HealthCheckResponse
*/
package grpc_health_v1
package grpc_health_v1 // import "google.golang.org/grpc/health/grpc_health_v1"
import proto "github.com/golang/protobuf/proto"
import fmt "fmt"
@ -57,26 +46,84 @@ func (x HealthCheckResponse_ServingStatus) String() string {
return proto.EnumName(HealthCheckResponse_ServingStatus_name, int32(x))
}
func (HealthCheckResponse_ServingStatus) EnumDescriptor() ([]byte, []int) {
return fileDescriptor0, []int{1, 0}
return fileDescriptor_health_85731b6c49265086, []int{1, 0}
}
type HealthCheckRequest struct {
Service string `protobuf:"bytes,1,opt,name=service" json:"service,omitempty"`
Service string `protobuf:"bytes,1,opt,name=service,proto3" json:"service,omitempty"`
XXX_NoUnkeyedLiteral struct{} `json:"-"`
XXX_unrecognized []byte `json:"-"`
XXX_sizecache int32 `json:"-"`
}
func (m *HealthCheckRequest) Reset() { *m = HealthCheckRequest{} }
func (m *HealthCheckRequest) String() string { return proto.CompactTextString(m) }
func (*HealthCheckRequest) ProtoMessage() {}
func (*HealthCheckRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{0} }
func (m *HealthCheckRequest) Reset() { *m = HealthCheckRequest{} }
func (m *HealthCheckRequest) String() string { return proto.CompactTextString(m) }
func (*HealthCheckRequest) ProtoMessage() {}
func (*HealthCheckRequest) Descriptor() ([]byte, []int) {
return fileDescriptor_health_85731b6c49265086, []int{0}
}
func (m *HealthCheckRequest) XXX_Unmarshal(b []byte) error {
return xxx_messageInfo_HealthCheckRequest.Unmarshal(m, b)
}
func (m *HealthCheckRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
return xxx_messageInfo_HealthCheckRequest.Marshal(b, m, deterministic)
}
func (dst *HealthCheckRequest) XXX_Merge(src proto.Message) {
xxx_messageInfo_HealthCheckRequest.Merge(dst, src)
}
func (m *HealthCheckRequest) XXX_Size() int {
return xxx_messageInfo_HealthCheckRequest.Size(m)
}
func (m *HealthCheckRequest) XXX_DiscardUnknown() {
xxx_messageInfo_HealthCheckRequest.DiscardUnknown(m)
}
var xxx_messageInfo_HealthCheckRequest proto.InternalMessageInfo
func (m *HealthCheckRequest) GetService() string {
if m != nil {
return m.Service
}
return ""
}
type HealthCheckResponse struct {
Status HealthCheckResponse_ServingStatus `protobuf:"varint,1,opt,name=status,enum=grpc.health.v1.HealthCheckResponse_ServingStatus" json:"status,omitempty"`
Status HealthCheckResponse_ServingStatus `protobuf:"varint,1,opt,name=status,proto3,enum=grpc.health.v1.HealthCheckResponse_ServingStatus" json:"status,omitempty"`
XXX_NoUnkeyedLiteral struct{} `json:"-"`
XXX_unrecognized []byte `json:"-"`
XXX_sizecache int32 `json:"-"`
}
func (m *HealthCheckResponse) Reset() { *m = HealthCheckResponse{} }
func (m *HealthCheckResponse) String() string { return proto.CompactTextString(m) }
func (*HealthCheckResponse) ProtoMessage() {}
func (*HealthCheckResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{1} }
func (m *HealthCheckResponse) Reset() { *m = HealthCheckResponse{} }
func (m *HealthCheckResponse) String() string { return proto.CompactTextString(m) }
func (*HealthCheckResponse) ProtoMessage() {}
func (*HealthCheckResponse) Descriptor() ([]byte, []int) {
return fileDescriptor_health_85731b6c49265086, []int{1}
}
func (m *HealthCheckResponse) XXX_Unmarshal(b []byte) error {
return xxx_messageInfo_HealthCheckResponse.Unmarshal(m, b)
}
func (m *HealthCheckResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
return xxx_messageInfo_HealthCheckResponse.Marshal(b, m, deterministic)
}
func (dst *HealthCheckResponse) XXX_Merge(src proto.Message) {
xxx_messageInfo_HealthCheckResponse.Merge(dst, src)
}
func (m *HealthCheckResponse) XXX_Size() int {
return xxx_messageInfo_HealthCheckResponse.Size(m)
}
func (m *HealthCheckResponse) XXX_DiscardUnknown() {
xxx_messageInfo_HealthCheckResponse.DiscardUnknown(m)
}
var xxx_messageInfo_HealthCheckResponse proto.InternalMessageInfo
func (m *HealthCheckResponse) GetStatus() HealthCheckResponse_ServingStatus {
if m != nil {
return m.Status
}
return HealthCheckResponse_UNKNOWN
}
func init() {
proto.RegisterType((*HealthCheckRequest)(nil), "grpc.health.v1.HealthCheckRequest")
@ -92,8 +139,9 @@ var _ grpc.ClientConn
// is compatible with the grpc package it is being compiled against.
const _ = grpc.SupportPackageIsVersion4
// Client API for Health service
// HealthClient is the client API for Health service.
//
// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://godoc.org/google.golang.org/grpc#ClientConn.NewStream.
type HealthClient interface {
Check(ctx context.Context, in *HealthCheckRequest, opts ...grpc.CallOption) (*HealthCheckResponse, error)
}
@ -108,15 +156,14 @@ func NewHealthClient(cc *grpc.ClientConn) HealthClient {
func (c *healthClient) Check(ctx context.Context, in *HealthCheckRequest, opts ...grpc.CallOption) (*HealthCheckResponse, error) {
out := new(HealthCheckResponse)
err := grpc.Invoke(ctx, "/grpc.health.v1.Health/Check", in, out, c.cc, opts...)
err := c.cc.Invoke(ctx, "/grpc.health.v1.Health/Check", in, out, opts...)
if err != nil {
return nil, err
}
return out, nil
}
// Server API for Health service
// HealthServer is the server API for Health service.
type HealthServer interface {
Check(context.Context, *HealthCheckRequest) (*HealthCheckResponse, error)
}
@ -153,24 +200,28 @@ var _Health_serviceDesc = grpc.ServiceDesc{
},
},
Streams: []grpc.StreamDesc{},
Metadata: "health.proto",
Metadata: "grpc/health/v1/health.proto",
}
func init() { proto.RegisterFile("health.proto", fileDescriptor0) }
func init() { proto.RegisterFile("grpc/health/v1/health.proto", fileDescriptor_health_85731b6c49265086) }
var fileDescriptor0 = []byte{
// 204 bytes of a gzipped FileDescriptorProto
0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x02, 0xff, 0xe2, 0xe2, 0xc9, 0x48, 0x4d, 0xcc,
0x29, 0xc9, 0xd0, 0x2b, 0x28, 0xca, 0x2f, 0xc9, 0x17, 0xe2, 0x4b, 0x2f, 0x2a, 0x48, 0xd6, 0x83,
0x0a, 0x95, 0x19, 0x2a, 0xe9, 0x71, 0x09, 0x79, 0x80, 0x39, 0xce, 0x19, 0xa9, 0xc9, 0xd9, 0x41,
0xa9, 0x85, 0xa5, 0xa9, 0xc5, 0x25, 0x42, 0x12, 0x5c, 0xec, 0xc5, 0xa9, 0x45, 0x65, 0x99, 0xc9,
0xa9, 0x12, 0x8c, 0x0a, 0x8c, 0x1a, 0x9c, 0x41, 0x30, 0xae, 0xd2, 0x1c, 0x46, 0x2e, 0x61, 0x14,
0x0d, 0xc5, 0x05, 0xf9, 0x79, 0xc5, 0xa9, 0x42, 0x9e, 0x5c, 0x6c, 0xc5, 0x25, 0x89, 0x25, 0xa5,
0xc5, 0x60, 0x0d, 0x7c, 0x46, 0x86, 0x7a, 0xa8, 0x16, 0xe9, 0x61, 0xd1, 0xa4, 0x17, 0x0c, 0x32,
0x34, 0x2f, 0x3d, 0x18, 0xac, 0x31, 0x08, 0x6a, 0x80, 0x92, 0x15, 0x17, 0x2f, 0x8a, 0x84, 0x10,
0x37, 0x17, 0x7b, 0xa8, 0x9f, 0xb7, 0x9f, 0x7f, 0xb8, 0x9f, 0x00, 0x03, 0x88, 0x13, 0xec, 0x1a,
0x14, 0xe6, 0xe9, 0xe7, 0x2e, 0xc0, 0x28, 0xc4, 0xcf, 0xc5, 0xed, 0xe7, 0x1f, 0x12, 0x0f, 0x13,
0x60, 0x32, 0x8a, 0xe2, 0x62, 0x83, 0x58, 0x24, 0x14, 0xc0, 0xc5, 0x0a, 0xb6, 0x4c, 0x48, 0x09,
0xaf, 0x4b, 0xc0, 0xfe, 0x95, 0x52, 0x26, 0xc2, 0xb5, 0x49, 0x6c, 0xe0, 0x10, 0x34, 0x06, 0x04,
0x00, 0x00, 0xff, 0xff, 0xac, 0x56, 0x2a, 0xcb, 0x51, 0x01, 0x00, 0x00,
var fileDescriptor_health_85731b6c49265086 = []byte{
// 271 bytes of a gzipped FileDescriptorProto
0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0x92, 0x4e, 0x2f, 0x2a, 0x48,
0xd6, 0xcf, 0x48, 0x4d, 0xcc, 0x29, 0xc9, 0xd0, 0x2f, 0x33, 0x84, 0xb2, 0xf4, 0x0a, 0x8a, 0xf2,
0x4b, 0xf2, 0x85, 0xf8, 0x40, 0x92, 0x7a, 0x50, 0xa1, 0x32, 0x43, 0x25, 0x3d, 0x2e, 0x21, 0x0f,
0x30, 0xc7, 0x39, 0x23, 0x35, 0x39, 0x3b, 0x28, 0xb5, 0xb0, 0x34, 0xb5, 0xb8, 0x44, 0x48, 0x82,
0x8b, 0xbd, 0x38, 0xb5, 0xa8, 0x2c, 0x33, 0x39, 0x55, 0x82, 0x51, 0x81, 0x51, 0x83, 0x33, 0x08,
0xc6, 0x55, 0x9a, 0xc3, 0xc8, 0x25, 0x8c, 0xa2, 0xa1, 0xb8, 0x20, 0x3f, 0xaf, 0x38, 0x55, 0xc8,
0x93, 0x8b, 0xad, 0xb8, 0x24, 0xb1, 0xa4, 0xb4, 0x18, 0xac, 0x81, 0xcf, 0xc8, 0x50, 0x0f, 0xd5,
0x22, 0x3d, 0x2c, 0x9a, 0xf4, 0x82, 0x41, 0x86, 0xe6, 0xa5, 0x07, 0x83, 0x35, 0x06, 0x41, 0x0d,
0x50, 0xb2, 0xe2, 0xe2, 0x45, 0x91, 0x10, 0xe2, 0xe6, 0x62, 0x0f, 0xf5, 0xf3, 0xf6, 0xf3, 0x0f,
0xf7, 0x13, 0x60, 0x00, 0x71, 0x82, 0x5d, 0x83, 0xc2, 0x3c, 0xfd, 0xdc, 0x05, 0x18, 0x85, 0xf8,
0xb9, 0xb8, 0xfd, 0xfc, 0x43, 0xe2, 0x61, 0x02, 0x4c, 0x46, 0x51, 0x5c, 0x6c, 0x10, 0x8b, 0x84,
0x02, 0xb8, 0x58, 0xc1, 0x96, 0x09, 0x29, 0xe1, 0x75, 0x09, 0xd8, 0xbf, 0x52, 0xca, 0x44, 0xb8,
0xd6, 0x29, 0x91, 0x4b, 0x30, 0x33, 0x1f, 0x4d, 0xa1, 0x13, 0x37, 0x44, 0x65, 0x00, 0x28, 0x70,
0x03, 0x18, 0xa3, 0x74, 0xd2, 0xf3, 0xf3, 0xd3, 0x73, 0x52, 0xf5, 0xd2, 0xf3, 0x73, 0x12, 0xf3,
0xd2, 0xf5, 0xf2, 0x8b, 0xd2, 0xf5, 0x91, 0x63, 0x03, 0xc4, 0x8e, 0x87, 0xb0, 0xe3, 0xcb, 0x0c,
0x57, 0x31, 0xf1, 0xb9, 0x83, 0x4c, 0x83, 0x18, 0xa1, 0x17, 0x66, 0x98, 0xc4, 0x06, 0x8e, 0x24,
0x63, 0x40, 0x00, 0x00, 0x00, 0xff, 0xff, 0xec, 0x66, 0x81, 0xcb, 0xc3, 0x01, 0x00, 0x00,
}

34
vendor/google.golang.org/grpc/health/grpc_health_v1/health.proto generated vendored
View File

@ -1,34 +0,0 @@
// Copyright 2017 gRPC authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
syntax = "proto3";
package grpc.health.v1;
message HealthCheckRequest {
string service = 1;
}
message HealthCheckResponse {
enum ServingStatus {
UNKNOWN = 0;
SERVING = 1;
NOT_SERVING = 2;
}
ServingStatus status = 1;
}
service Health{
rpc Check(HealthCheckRequest) returns (HealthCheckResponse);
}

6
vendor/google.golang.org/grpc/health/health.go generated vendored
View File

@ -16,6 +16,8 @@
*
*/
//go:generate ./regenerate.sh
// Package health provides some utility functions to health-check a server. The implementation
// is based on protobuf. Users need to write their own implementations if other IDLs are used.
package health
@ -24,9 +26,9 @@ import (
"sync"
"golang.org/x/net/context"
"google.golang.org/grpc"
"google.golang.org/grpc/codes"
healthpb "google.golang.org/grpc/health/grpc_health_v1"
"google.golang.org/grpc/status"
)
// Server implements `service Health`.
@ -58,7 +60,7 @@ func (s *Server) Check(ctx context.Context, in *healthpb.HealthCheckRequest) (*h
Status: status,
}, nil
}
return nil, grpc.Errorf(codes.NotFound, "unknown service")
return nil, status.Error(codes.NotFound, "unknown service")
}
// SetServingStatus is called when need to reset the serving status of a service

33
vendor/google.golang.org/grpc/health/regenerate.sh generated vendored Executable file
View File

@ -0,0 +1,33 @@
#!/bin/bash
# Copyright 2018 gRPC authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
set -eux -o pipefail
TMP=$(mktemp -d)
function finish {
rm -rf "$TMP"
}
trap finish EXIT
pushd "$TMP"
mkdir -p grpc/health/v1
curl https://raw.githubusercontent.com/grpc/grpc-proto/master/grpc/health/v1/health.proto > grpc/health/v1/health.proto
protoc --go_out=plugins=grpc,paths=source_relative:. -I. grpc/health/v1/*.proto
popd
rm -f grpc_health_v1/*.pb.go
cp "$TMP"/grpc/health/v1/*.pb.go grpc_health_v1/

6
vendor/google.golang.org/grpc/install_gae.sh generated vendored Executable file
View File

@ -0,0 +1,6 @@
#!/bin/bash
TMP=$(mktemp -d /tmp/sdk.XXX) \
&& curl -o $TMP.zip "https://storage.googleapis.com/appengine-sdks/featured/go_appengine_sdk_linux_amd64-1.9.64.zip" \
&& unzip -q $TMP.zip -d $TMP \
&& export PATH="$PATH:$TMP/go_appengine"

4
vendor/google.golang.org/grpc/interceptor.go generated vendored
View File

@ -48,7 +48,9 @@ type UnaryServerInfo struct {
}
// UnaryHandler defines the handler invoked by UnaryServerInterceptor to complete the normal
// execution of a unary RPC.
// execution of a unary RPC. If a UnaryHandler returns an error, it should be produced by the
// status package, or else gRPC will use codes.Unknown as the status code and err.Error() as
// the status message of the RPC.
type UnaryHandler func(ctx context.Context, req interface{}) (interface{}, error)
// UnaryServerInterceptor provides a hook to intercept the execution of a unary RPC on the server. info

78
vendor/google.golang.org/grpc/internal/backoff/backoff.go generated vendored Normal file
View File

@ -0,0 +1,78 @@
/*
*
* Copyright 2017 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
// Package backoff implement the backoff strategy for gRPC.
//
// This is kept in internal until the gRPC project decides whether or not to
// allow alternative backoff strategies.
package backoff
import (
"time"
"google.golang.org/grpc/internal/grpcrand"
)
// Strategy defines the methodology for backing off after a grpc connection
// failure.
//
type Strategy interface {
// Backoff returns the amount of time to wait before the next retry given
// the number of consecutive failures.
Backoff(retries int) time.Duration
}
const (
// baseDelay is the amount of time to wait before retrying after the first
// failure.
baseDelay = 1.0 * time.Second
// factor is applied to the backoff after each retry.
factor = 1.6
// jitter provides a range to randomize backoff delays.
jitter = 0.2
)
// Exponential implements exponential backoff algorithm as defined in
// https://github.com/grpc/grpc/blob/master/doc/connection-backoff.md.
type Exponential struct {
// MaxDelay is the upper bound of backoff delay.
MaxDelay time.Duration
}
// Backoff returns the amount of time to wait before the next retry given the
// number of retries.
func (bc Exponential) Backoff(retries int) time.Duration {
if retries == 0 {
return baseDelay
}
backoff, max := float64(baseDelay), float64(bc.MaxDelay)
for backoff < max && retries > 0 {
backoff *= factor
retries--
}
if backoff > max {
backoff = max
}
// Randomize backoff delays so that if a cluster of requests start at
// the same time, they won't operate in lockstep.
backoff *= 1 + jitter*(grpcrand.Float64()*2-1)
if backoff < 0 {
return 0
}
return time.Duration(backoff)
}

573
vendor/google.golang.org/grpc/internal/channelz/funcs.go generated vendored Normal file
View File

@ -0,0 +1,573 @@
/*
*
* Copyright 2018 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
// Package channelz defines APIs for enabling channelz service, entry
// registration/deletion, and accessing channelz data. It also defines channelz
// metric struct formats.
//
// All APIs in this package are experimental.
package channelz
import (
"sort"
"sync"
"sync/atomic"
"google.golang.org/grpc/grpclog"
)
var (
db dbWrapper
idGen idGenerator
// EntryPerPage defines the number of channelz entries to be shown on a web page.
EntryPerPage = 50
curState int32
)
// TurnOn turns on channelz data collection.
func TurnOn() {
if !IsOn() {
NewChannelzStorage()
atomic.StoreInt32(&curState, 1)
}
}
// IsOn returns whether channelz data collection is on.
func IsOn() bool {
return atomic.CompareAndSwapInt32(&curState, 1, 1)
}
// dbWarpper wraps around a reference to internal channelz data storage, and
// provide synchronized functionality to set and get the reference.
type dbWrapper struct {
mu sync.RWMutex
DB *channelMap
}
func (d *dbWrapper) set(db *channelMap) {
d.mu.Lock()
d.DB = db
d.mu.Unlock()
}
func (d *dbWrapper) get() *channelMap {
d.mu.RLock()
defer d.mu.RUnlock()
return d.DB
}
// NewChannelzStorage initializes channelz data storage and id generator.
//
// Note: This function is exported for testing purpose only. User should not call
// it in most cases.
func NewChannelzStorage() {
db.set(&channelMap{
topLevelChannels: make(map[int64]struct{}),
channels: make(map[int64]*channel),
listenSockets: make(map[int64]*listenSocket),
normalSockets: make(map[int64]*normalSocket),
servers: make(map[int64]*server),
subChannels: make(map[int64]*subChannel),
})
idGen.reset()
}
// GetTopChannels returns a slice of top channel's ChannelMetric, along with a
// boolean indicating whether there's more top channels to be queried for.
//
// The arg id specifies that only top channel with id at or above it will be included
// in the result. The returned slice is up to a length of EntryPerPage, and is
// sorted in ascending id order.
func GetTopChannels(id int64) ([]*ChannelMetric, bool) {
return db.get().GetTopChannels(id)
}
// GetServers returns a slice of server's ServerMetric, along with a
// boolean indicating whether there's more servers to be queried for.
//
// The arg id specifies that only server with id at or above it will be included
// in the result. The returned slice is up to a length of EntryPerPage, and is
// sorted in ascending id order.
func GetServers(id int64) ([]*ServerMetric, bool) {
return db.get().GetServers(id)
}
// GetServerSockets returns a slice of server's (identified by id) normal socket's
// SocketMetric, along with a boolean indicating whether there's more sockets to
// be queried for.
//
// The arg startID specifies that only sockets with id at or above it will be
// included in the result. The returned slice is up to a length of EntryPerPage,
// and is sorted in ascending id order.
func GetServerSockets(id int64, startID int64) ([]*SocketMetric, bool) {
return db.get().GetServerSockets(id, startID)
}
// GetChannel returns the ChannelMetric for the channel (identified by id).
func GetChannel(id int64) *ChannelMetric {
return db.get().GetChannel(id)
}
// GetSubChannel returns the SubChannelMetric for the subchannel (identified by id).
func GetSubChannel(id int64) *SubChannelMetric {
return db.get().GetSubChannel(id)
}
// GetSocket returns the SocketInternalMetric for the socket (identified by id).
func GetSocket(id int64) *SocketMetric {
return db.get().GetSocket(id)
}
// RegisterChannel registers the given channel c in channelz database with ref
// as its reference name, and add it to the child list of its parent (identified
// by pid). pid = 0 means no parent. It returns the unique channelz tracking id
// assigned to this channel.
func RegisterChannel(c Channel, pid int64, ref string) int64 {
id := idGen.genID()
cn := &channel{
refName: ref,
c: c,
subChans: make(map[int64]string),
nestedChans: make(map[int64]string),
id: id,
pid: pid,
}
if pid == 0 {
db.get().addChannel(id, cn, true, pid, ref)
} else {
db.get().addChannel(id, cn, false, pid, ref)
}
return id
}
// RegisterSubChannel registers the given channel c in channelz database with ref
// as its reference name, and add it to the child list of its parent (identified
// by pid). It returns the unique channelz tracking id assigned to this subchannel.
func RegisterSubChannel(c Channel, pid int64, ref string) int64 {
if pid == 0 {
grpclog.Error("a SubChannel's parent id cannot be 0")
return 0
}
id := idGen.genID()
sc := &subChannel{
refName: ref,
c: c,
sockets: make(map[int64]string),
id: id,
pid: pid,
}
db.get().addSubChannel(id, sc, pid, ref)
return id
}
// RegisterServer registers the given server s in channelz database. It returns
// the unique channelz tracking id assigned to this server.
func RegisterServer(s Server, ref string) int64 {
id := idGen.genID()
svr := &server{
refName: ref,
s: s,
sockets: make(map[int64]string),
listenSockets: make(map[int64]string),
id: id,
}
db.get().addServer(id, svr)
return id
}
// RegisterListenSocket registers the given listen socket s in channelz database
// with ref as its reference name, and add it to the child list of its parent
// (identified by pid). It returns the unique channelz tracking id assigned to
// this listen socket.
func RegisterListenSocket(s Socket, pid int64, ref string) int64 {
if pid == 0 {
grpclog.Error("a ListenSocket's parent id cannot be 0")
return 0
}
id := idGen.genID()
ls := &listenSocket{refName: ref, s: s, id: id, pid: pid}
db.get().addListenSocket(id, ls, pid, ref)
return id
}
// RegisterNormalSocket registers the given normal socket s in channelz database
// with ref as its reference name, and add it to the child list of its parent
// (identified by pid). It returns the unique channelz tracking id assigned to
// this normal socket.
func RegisterNormalSocket(s Socket, pid int64, ref string) int64 {
if pid == 0 {
grpclog.Error("a NormalSocket's parent id cannot be 0")
return 0
}
id := idGen.genID()
ns := &normalSocket{refName: ref, s: s, id: id, pid: pid}
db.get().addNormalSocket(id, ns, pid, ref)
return id
}
// RemoveEntry removes an entry with unique channelz trakcing id to be id from
// channelz database.
func RemoveEntry(id int64) {
db.get().removeEntry(id)
}
// channelMap is the storage data structure for channelz.
// Methods of channelMap can be divided in two two categories with respect to locking.
// 1. Methods acquire the global lock.
// 2. Methods that can only be called when global lock is held.
// A second type of method need always to be called inside a first type of method.
type channelMap struct {
mu sync.RWMutex
topLevelChannels map[int64]struct{}
servers map[int64]*server
channels map[int64]*channel
subChannels map[int64]*subChannel
listenSockets map[int64]*listenSocket
normalSockets map[int64]*normalSocket
}
func (c *channelMap) addServer(id int64, s *server) {
c.mu.Lock()
s.cm = c
c.servers[id] = s
c.mu.Unlock()
}
func (c *channelMap) addChannel(id int64, cn *channel, isTopChannel bool, pid int64, ref string) {
c.mu.Lock()
cn.cm = c
c.channels[id] = cn
if isTopChannel {
c.topLevelChannels[id] = struct{}{}
} else {
c.findEntry(pid).addChild(id, cn)
}
c.mu.Unlock()
}
func (c *channelMap) addSubChannel(id int64, sc *subChannel, pid int64, ref string) {
c.mu.Lock()
sc.cm = c
c.subChannels[id] = sc
c.findEntry(pid).addChild(id, sc)
c.mu.Unlock()
}
func (c *channelMap) addListenSocket(id int64, ls *listenSocket, pid int64, ref string) {
c.mu.Lock()
ls.cm = c
c.listenSockets[id] = ls
c.findEntry(pid).addChild(id, ls)
c.mu.Unlock()
}
func (c *channelMap) addNormalSocket(id int64, ns *normalSocket, pid int64, ref string) {
c.mu.Lock()
ns.cm = c
c.normalSockets[id] = ns
c.findEntry(pid).addChild(id, ns)
c.mu.Unlock()
}
// removeEntry triggers the removal of an entry, which may not indeed delete the
// entry, if it has to wait on the deletion of its children, or may lead to a chain
// of entry deletion. For example, deleting the last socket of a gracefully shutting
// down server will lead to the server being also deleted.
func (c *channelMap) removeEntry(id int64) {
c.mu.Lock()
c.findEntry(id).triggerDelete()
c.mu.Unlock()
}
// c.mu must be held by the caller.
func (c *channelMap) findEntry(id int64) entry {
var v entry
var ok bool
if v, ok = c.channels[id]; ok {
return v
}
if v, ok = c.subChannels[id]; ok {
return v
}
if v, ok = c.servers[id]; ok {
return v
}
if v, ok = c.listenSockets[id]; ok {
return v
}
if v, ok = c.normalSockets[id]; ok {
return v
}
return &dummyEntry{idNotFound: id}
}
// c.mu must be held by the caller
// deleteEntry simply deletes an entry from the channelMap. Before calling this
// method, caller must check this entry is ready to be deleted, i.e removeEntry()
// has been called on it, and no children still exist.
// Conditionals are ordered by the expected frequency of deletion of each entity
// type, in order to optimize performance.
func (c *channelMap) deleteEntry(id int64) {
var ok bool
if _, ok = c.normalSockets[id]; ok {
delete(c.normalSockets, id)
return
}
if _, ok = c.subChannels[id]; ok {
delete(c.subChannels, id)
return
}
if _, ok = c.channels[id]; ok {
delete(c.channels, id)
delete(c.topLevelChannels, id)
return
}
if _, ok = c.listenSockets[id]; ok {
delete(c.listenSockets, id)
return
}
if _, ok = c.servers[id]; ok {
delete(c.servers, id)
return
}
}
type int64Slice []int64
func (s int64Slice) Len() int { return len(s) }
func (s int64Slice) Swap(i, j int) { s[i], s[j] = s[j], s[i] }
func (s int64Slice) Less(i, j int) bool { return s[i] < s[j] }
func copyMap(m map[int64]string) map[int64]string {
n := make(map[int64]string)
for k, v := range m {
n[k] = v
}
return n
}
func min(a, b int) int {
if a < b {
return a
}
return b
}
func (c *channelMap) GetTopChannels(id int64) ([]*ChannelMetric, bool) {
c.mu.RLock()
l := len(c.topLevelChannels)
ids := make([]int64, 0, l)
cns := make([]*channel, 0, min(l, EntryPerPage))
for k := range c.topLevelChannels {
ids = append(ids, k)
}
sort.Sort(int64Slice(ids))
idx := sort.Search(len(ids), func(i int) bool { return ids[i] >= id })
count := 0
var end bool
var t []*ChannelMetric
for i, v := range ids[idx:] {
if count == EntryPerPage {
break
}
if cn, ok := c.channels[v]; ok {
cns = append(cns, cn)
t = append(t, &ChannelMetric{
NestedChans: copyMap(cn.nestedChans),
SubChans: copyMap(cn.subChans),
})
count++
}
if i == len(ids[idx:])-1 {
end = true
break
}
}
c.mu.RUnlock()
if count == 0 {
end = true
}
for i, cn := range cns {
t[i].ChannelData = cn.c.ChannelzMetric()
t[i].ID = cn.id
t[i].RefName = cn.refName
}
return t, end
}
func (c *channelMap) GetServers(id int64) ([]*ServerMetric, bool) {
c.mu.RLock()
l := len(c.servers)
ids := make([]int64, 0, l)
ss := make([]*server, 0, min(l, EntryPerPage))
for k := range c.servers {
ids = append(ids, k)
}
sort.Sort(int64Slice(ids))
idx := sort.Search(len(ids), func(i int) bool { return ids[i] >= id })
count := 0
var end bool
var s []*ServerMetric
for i, v := range ids[idx:] {
if count == EntryPerPage {
break
}
if svr, ok := c.servers[v]; ok {
ss = append(ss, svr)
s = append(s, &ServerMetric{
ListenSockets: copyMap(svr.listenSockets),
})
count++
}
if i == len(ids[idx:])-1 {
end = true
break
}
}
c.mu.RUnlock()
if count == 0 {
end = true
}
for i, svr := range ss {
s[i].ServerData = svr.s.ChannelzMetric()
s[i].ID = svr.id
s[i].RefName = svr.refName
}
return s, end
}
func (c *channelMap) GetServerSockets(id int64, startID int64) ([]*SocketMetric, bool) {
var svr *server
var ok bool
c.mu.RLock()
if svr, ok = c.servers[id]; !ok {
// server with id doesn't exist.
c.mu.RUnlock()
return nil, true
}
svrskts := svr.sockets
l := len(svrskts)
ids := make([]int64, 0, l)
sks := make([]*normalSocket, 0, min(l, EntryPerPage))
for k := range svrskts {
ids = append(ids, k)
}
sort.Sort((int64Slice(ids)))
idx := sort.Search(len(ids), func(i int) bool { return ids[i] >= id })
count := 0
var end bool
for i, v := range ids[idx:] {
if count == EntryPerPage {
break
}
if ns, ok := c.normalSockets[v]; ok {
sks = append(sks, ns)
count++
}
if i == len(ids[idx:])-1 {
end = true
break
}
}
c.mu.RUnlock()
if count == 0 {
end = true
}
var s []*SocketMetric
for _, ns := range sks {
sm := &SocketMetric{}
sm.SocketData = ns.s.ChannelzMetric()
sm.ID = ns.id
sm.RefName = ns.refName
s = append(s, sm)
}
return s, end
}
func (c *channelMap) GetChannel(id int64) *ChannelMetric {
cm := &ChannelMetric{}
var cn *channel
var ok bool
c.mu.RLock()
if cn, ok = c.channels[id]; !ok {
// channel with id doesn't exist.
c.mu.RUnlock()
return nil
}
cm.NestedChans = copyMap(cn.nestedChans)
cm.SubChans = copyMap(cn.subChans)
c.mu.RUnlock()
cm.ChannelData = cn.c.ChannelzMetric()
cm.ID = cn.id
cm.RefName = cn.refName
return cm
}
func (c *channelMap) GetSubChannel(id int64) *SubChannelMetric {
cm := &SubChannelMetric{}
var sc *subChannel
var ok bool
c.mu.RLock()
if sc, ok = c.subChannels[id]; !ok {
// subchannel with id doesn't exist.
c.mu.RUnlock()
return nil
}
cm.Sockets = copyMap(sc.sockets)
c.mu.RUnlock()
cm.ChannelData = sc.c.ChannelzMetric()
cm.ID = sc.id
cm.RefName = sc.refName
return cm
}
func (c *channelMap) GetSocket(id int64) *SocketMetric {
sm := &SocketMetric{}
c.mu.RLock()
if ls, ok := c.listenSockets[id]; ok {
c.mu.RUnlock()
sm.SocketData = ls.s.ChannelzMetric()
sm.ID = ls.id
sm.RefName = ls.refName
return sm
}
if ns, ok := c.normalSockets[id]; ok {
c.mu.RUnlock()
sm.SocketData = ns.s.ChannelzMetric()
sm.ID = ns.id
sm.RefName = ns.refName
return sm
}
c.mu.RUnlock()
return nil
}
type idGenerator struct {
id int64
}
func (i *idGenerator) reset() {
atomic.StoreInt64(&i.id, 0)
}
func (i *idGenerator) genID() int64 {
return atomic.AddInt64(&i.id, 1)
}

419
vendor/google.golang.org/grpc/internal/channelz/types.go generated vendored Normal file
View File

@ -0,0 +1,419 @@
/*
*
* Copyright 2018 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package channelz
import (
"net"
"time"
"google.golang.org/grpc/connectivity"
"google.golang.org/grpc/credentials"
"google.golang.org/grpc/grpclog"
)
// entry represents a node in the channelz database.
type entry interface {
// addChild adds a child e, whose channelz id is id to child list
addChild(id int64, e entry)
// deleteChild deletes a child with channelz id to be id from child list
deleteChild(id int64)
// triggerDelete tries to delete self from channelz database. However, if child
// list is not empty, then deletion from the database is on hold until the last
// child is deleted from database.
triggerDelete()
// deleteSelfIfReady check whether triggerDelete() has been called before, and whether child
// list is now empty. If both conditions are met, then delete self from database.
deleteSelfIfReady()
}
// dummyEntry is a fake entry to handle entry not found case.
type dummyEntry struct {
idNotFound int64
}
func (d *dummyEntry) addChild(id int64, e entry) {
// Note: It is possible for a normal program to reach here under race condition.
// For example, there could be a race between ClientConn.Close() info being propagated
// to addrConn and http2Client. ClientConn.Close() cancel the context and result
// in http2Client to error. The error info is then caught by transport monitor
// and before addrConn.tearDown() is called in side ClientConn.Close(). Therefore,
// the addrConn will create a new transport. And when registering the new transport in
// channelz, its parent addrConn could have already been torn down and deleted
// from channelz tracking, and thus reach the code here.
grpclog.Infof("attempt to add child of type %T with id %d to a parent (id=%d) that doesn't currently exist", e, id, d.idNotFound)
}
func (d *dummyEntry) deleteChild(id int64) {
// It is possible for a normal program to reach here under race condition.
// Refer to the example described in addChild().
grpclog.Infof("attempt to delete child with id %d from a parent (id=%d) that doesn't currently exist", id, d.idNotFound)
}
func (d *dummyEntry) triggerDelete() {
grpclog.Warningf("attempt to delete an entry (id=%d) that doesn't currently exist", d.idNotFound)
}
func (*dummyEntry) deleteSelfIfReady() {
// code should not reach here. deleteSelfIfReady is always called on an existing entry.
}
// ChannelMetric defines the info channelz provides for a specific Channel, which
// includes ChannelInternalMetric and channelz-specific data, such as channelz id,
// child list, etc.
type ChannelMetric struct {
// ID is the channelz id of this channel.
ID int64
// RefName is the human readable reference string of this channel.
RefName string
// ChannelData contains channel internal metric reported by the channel through
// ChannelzMetric().
ChannelData *ChannelInternalMetric
// NestedChans tracks the nested channel type children of this channel in the format of
// a map from nested channel channelz id to corresponding reference string.
NestedChans map[int64]string
// SubChans tracks the subchannel type children of this channel in the format of a
// map from subchannel channelz id to corresponding reference string.
SubChans map[int64]string
// Sockets tracks the socket type children of this channel in the format of a map
// from socket channelz id to corresponding reference string.
// Note current grpc implementation doesn't allow channel having sockets directly,
// therefore, this is field is unused.
Sockets map[int64]string
}
// SubChannelMetric defines the info channelz provides for a specific SubChannel,
// which includes ChannelInternalMetric and channelz-specific data, such as
// channelz id, child list, etc.
type SubChannelMetric struct {
// ID is the channelz id of this subchannel.
ID int64
// RefName is the human readable reference string of this subchannel.
RefName string
// ChannelData contains subchannel internal metric reported by the subchannel
// through ChannelzMetric().
ChannelData *ChannelInternalMetric
// NestedChans tracks the nested channel type children of this subchannel in the format of
// a map from nested channel channelz id to corresponding reference string.
// Note current grpc implementation doesn't allow subchannel to have nested channels
// as children, therefore, this field is unused.
NestedChans map[int64]string
// SubChans tracks the subchannel type children of this subchannel in the format of a
// map from subchannel channelz id to corresponding reference string.
// Note current grpc implementation doesn't allow subchannel to have subchannels
// as children, therefore, this field is unused.
SubChans map[int64]string
// Sockets tracks the socket type children of this subchannel in the format of a map
// from socket channelz id to corresponding reference string.
Sockets map[int64]string
}
// ChannelInternalMetric defines the struct that the implementor of Channel interface
// should return from ChannelzMetric().
type ChannelInternalMetric struct {
// current connectivity state of the channel.
State connectivity.State
// The target this channel originally tried to connect to. May be absent
Target string
// The number of calls started on the channel.
CallsStarted int64
// The number of calls that have completed with an OK status.
CallsSucceeded int64
// The number of calls that have a completed with a non-OK status.
CallsFailed int64
// The last time a call was started on the channel.
LastCallStartedTimestamp time.Time
//TODO: trace
}
// Channel is the interface that should be satisfied in order to be tracked by
// channelz as Channel or SubChannel.
type Channel interface {
ChannelzMetric() *ChannelInternalMetric
}
type channel struct {
refName string
c Channel
closeCalled bool
nestedChans map[int64]string
subChans map[int64]string
id int64
pid int64
cm *channelMap
}
func (c *channel) addChild(id int64, e entry) {
switch v := e.(type) {
case *subChannel:
c.subChans[id] = v.refName
case *channel:
c.nestedChans[id] = v.refName
default:
grpclog.Errorf("cannot add a child (id = %d) of type %T to a channel", id, e)
}
}
func (c *channel) deleteChild(id int64) {
delete(c.subChans, id)
delete(c.nestedChans, id)
c.deleteSelfIfReady()
}
func (c *channel) triggerDelete() {
c.closeCalled = true
c.deleteSelfIfReady()
}
func (c *channel) deleteSelfIfReady() {
if !c.closeCalled || len(c.subChans)+len(c.nestedChans) != 0 {
return
}
c.cm.deleteEntry(c.id)
// not top channel
if c.pid != 0 {
c.cm.findEntry(c.pid).deleteChild(c.id)
}
}
type subChannel struct {
refName string
c Channel
closeCalled bool
sockets map[int64]string
id int64
pid int64
cm *channelMap
}
func (sc *subChannel) addChild(id int64, e entry) {
if v, ok := e.(*normalSocket); ok {
sc.sockets[id] = v.refName
} else {
grpclog.Errorf("cannot add a child (id = %d) of type %T to a subChannel", id, e)
}
}
func (sc *subChannel) deleteChild(id int64) {
delete(sc.sockets, id)
sc.deleteSelfIfReady()
}
func (sc *subChannel) triggerDelete() {
sc.closeCalled = true
sc.deleteSelfIfReady()
}
func (sc *subChannel) deleteSelfIfReady() {
if !sc.closeCalled || len(sc.sockets) != 0 {
return
}
sc.cm.deleteEntry(sc.id)
sc.cm.findEntry(sc.pid).deleteChild(sc.id)
}
// SocketMetric defines the info channelz provides for a specific Socket, which
// includes SocketInternalMetric and channelz-specific data, such as channelz id, etc.
type SocketMetric struct {
// ID is the channelz id of this socket.
ID int64
// RefName is the human readable reference string of this socket.
RefName string
// SocketData contains socket internal metric reported by the socket through
// ChannelzMetric().
SocketData *SocketInternalMetric
}
// SocketInternalMetric defines the struct that the implementor of Socket interface
// should return from ChannelzMetric().
type SocketInternalMetric struct {
// The number of streams that have been started.
StreamsStarted int64
// The number of streams that have ended successfully:
// On client side, receiving frame with eos bit set.
// On server side, sending frame with eos bit set.
StreamsSucceeded int64
// The number of streams that have ended unsuccessfully:
// On client side, termination without receiving frame with eos bit set.
// On server side, termination without sending frame with eos bit set.
StreamsFailed int64
// The number of messages successfully sent on this socket.
MessagesSent int64
MessagesReceived int64
// The number of keep alives sent. This is typically implemented with HTTP/2
// ping messages.
KeepAlivesSent int64
// The last time a stream was created by this endpoint. Usually unset for
// servers.
LastLocalStreamCreatedTimestamp time.Time
// The last time a stream was created by the remote endpoint. Usually unset
// for clients.
LastRemoteStreamCreatedTimestamp time.Time
// The last time a message was sent by this endpoint.
LastMessageSentTimestamp time.Time
// The last time a message was received by this endpoint.
LastMessageReceivedTimestamp time.Time
// The amount of window, granted to the local endpoint by the remote endpoint.
// This may be slightly out of date due to network latency. This does NOT
// include stream level or TCP level flow control info.
LocalFlowControlWindow int64
// The amount of window, granted to the remote endpoint by the local endpoint.
// This may be slightly out of date due to network latency. This does NOT
// include stream level or TCP level flow control info.
RemoteFlowControlWindow int64
// The locally bound address.
LocalAddr net.Addr
// The remote bound address. May be absent.
RemoteAddr net.Addr
// Optional, represents the name of the remote endpoint, if different than
// the original target name.
RemoteName string
SocketOptions *SocketOptionData
Security credentials.ChannelzSecurityValue
}
// Socket is the interface that should be satisfied in order to be tracked by
// channelz as Socket.
type Socket interface {
ChannelzMetric() *SocketInternalMetric
}
type listenSocket struct {
refName string
s Socket
id int64
pid int64
cm *channelMap
}
func (ls *listenSocket) addChild(id int64, e entry) {
grpclog.Errorf("cannot add a child (id = %d) of type %T to a listen socket", id, e)
}
func (ls *listenSocket) deleteChild(id int64) {
grpclog.Errorf("cannot delete a child (id = %d) from a listen socket", id)
}
func (ls *listenSocket) triggerDelete() {
ls.cm.deleteEntry(ls.id)
ls.cm.findEntry(ls.pid).deleteChild(ls.id)
}
func (ls *listenSocket) deleteSelfIfReady() {
grpclog.Errorf("cannot call deleteSelfIfReady on a listen socket")
}
type normalSocket struct {
refName string
s Socket
id int64
pid int64
cm *channelMap
}
func (ns *normalSocket) addChild(id int64, e entry) {
grpclog.Errorf("cannot add a child (id = %d) of type %T to a normal socket", id, e)
}
func (ns *normalSocket) deleteChild(id int64) {
grpclog.Errorf("cannot delete a child (id = %d) from a normal socket", id)
}
func (ns *normalSocket) triggerDelete() {
ns.cm.deleteEntry(ns.id)
ns.cm.findEntry(ns.pid).deleteChild(ns.id)
}
func (ns *normalSocket) deleteSelfIfReady() {
grpclog.Errorf("cannot call deleteSelfIfReady on a normal socket")
}
// ServerMetric defines the info channelz provides for a specific Server, which
// includes ServerInternalMetric and channelz-specific data, such as channelz id,
// child list, etc.
type ServerMetric struct {
// ID is the channelz id of this server.
ID int64
// RefName is the human readable reference string of this server.
RefName string
// ServerData contains server internal metric reported by the server through
// ChannelzMetric().
ServerData *ServerInternalMetric
// ListenSockets tracks the listener socket type children of this server in the
// format of a map from socket channelz id to corresponding reference string.
ListenSockets map[int64]string
}
// ServerInternalMetric defines the struct that the implementor of Server interface
// should return from ChannelzMetric().
type ServerInternalMetric struct {
// The number of incoming calls started on the server.
CallsStarted int64
// The number of incoming calls that have completed with an OK status.
CallsSucceeded int64
// The number of incoming calls that have a completed with a non-OK status.
CallsFailed int64
// The last time a call was started on the server.
LastCallStartedTimestamp time.Time
//TODO: trace
}
// Server is the interface to be satisfied in order to be tracked by channelz as
// Server.
type Server interface {
ChannelzMetric() *ServerInternalMetric
}
type server struct {
refName string
s Server
closeCalled bool
sockets map[int64]string
listenSockets map[int64]string
id int64
cm *channelMap
}
func (s *server) addChild(id int64, e entry) {
switch v := e.(type) {
case *normalSocket:
s.sockets[id] = v.refName
case *listenSocket:
s.listenSockets[id] = v.refName
default:
grpclog.Errorf("cannot add a child (id = %d) of type %T to a server", id, e)
}
}
func (s *server) deleteChild(id int64) {
delete(s.sockets, id)
delete(s.listenSockets, id)
s.deleteSelfIfReady()
}
func (s *server) triggerDelete() {
s.closeCalled = true
s.deleteSelfIfReady()
}
func (s *server) deleteSelfIfReady() {
if !s.closeCalled || len(s.sockets)+len(s.listenSockets) != 0 {
return
}
s.cm.deleteEntry(s.id)
}

54
vendor/google.golang.org/grpc/internal/channelz/types_linux.go generated vendored Normal file
View File

@ -0,0 +1,54 @@
// +build !appengine
/*
*
* Copyright 2018 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package channelz
import (
"syscall"
"golang.org/x/sys/unix"
)
// SocketOptionData defines the struct to hold socket option data, and related
// getter function to obtain info from fd.
type SocketOptionData struct {
Linger *unix.Linger
RecvTimeout *unix.Timeval
SendTimeout *unix.Timeval
TCPInfo *unix.TCPInfo
}
// Getsockopt defines the function to get socket options requested by channelz.
// It is to be passed to syscall.RawConn.Control().
func (s *SocketOptionData) Getsockopt(fd uintptr) {
if v, err := unix.GetsockoptLinger(int(fd), syscall.SOL_SOCKET, syscall.SO_LINGER); err == nil {
s.Linger = v
}
if v, err := unix.GetsockoptTimeval(int(fd), syscall.SOL_SOCKET, syscall.SO_RCVTIMEO); err == nil {
s.RecvTimeout = v
}
if v, err := unix.GetsockoptTimeval(int(fd), syscall.SOL_SOCKET, syscall.SO_SNDTIMEO); err == nil {
s.SendTimeout = v
}
if v, err := unix.GetsockoptTCPInfo(int(fd), syscall.SOL_TCP, syscall.TCP_INFO); err == nil {
s.TCPInfo = v
}
return
}

38
vendor/google.golang.org/grpc/internal/channelz/types_nonlinux.go generated vendored Normal file
View File

@ -0,0 +1,38 @@
// +build !linux appengine
/*
*
* Copyright 2018 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package channelz
import "google.golang.org/grpc/grpclog"
func init() {
grpclog.Infof("Channelz: socket options are not supported on non-linux os and appengine.")
}
// SocketOptionData defines the struct to hold socket option data, and related
// getter function to obtain info from fd.
// Windows OS doesn't support Socket Option
type SocketOptionData struct {
}
// Getsockopt defines the function to get socket options requested by channelz.
// It is to be passed to syscall.RawConn.Control().
// Windows OS doesn't support Socket Option
func (s *SocketOptionData) Getsockopt(fd uintptr) {}

39
vendor/google.golang.org/grpc/internal/channelz/util_linux_go19.go generated vendored Normal file
View File

@ -0,0 +1,39 @@
// +build linux,go1.9,!appengine
/*
*
* Copyright 2018 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package channelz
import (
"syscall"
)
// GetSocketOption gets the socket option info of the conn.
func GetSocketOption(socket interface{}) *SocketOptionData {
c, ok := socket.(syscall.Conn)
if !ok {
return nil
}
data := &SocketOptionData{}
if rawConn, err := c.SyscallConn(); err == nil {
rawConn.Control(data.Getsockopt)
return data
}
return nil
}

26
vendor/google.golang.org/grpc/internal/channelz/util_nonlinux_pre_go19.go generated vendored Normal file
View File

@ -0,0 +1,26 @@
// +build !linux !go1.9 appengine
/*
*
* Copyright 2018 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package channelz
// GetSocketOption gets the socket option info of the conn.
func GetSocketOption(c interface{}) *SocketOptionData {
return nil
}

35
vendor/google.golang.org/grpc/internal/envconfig/envconfig.go generated vendored Normal file
View File

@ -0,0 +1,35 @@
/*
*
* Copyright 2018 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
// Package envconfig contains grpc settings configured by environment variables.
package envconfig
import (
"os"
"strings"
)
const (
prefix = "GRPC_GO_"
retryStr = prefix + "RETRY"
)
var (
// Retry is set if retry is explicitly enabled via "GRPC_GO_RETRY=on".
Retry = strings.EqualFold(os.Getenv(retryStr), "on")
)

56
vendor/google.golang.org/grpc/internal/grpcrand/grpcrand.go generated vendored Normal file
View File

@ -0,0 +1,56 @@
/*
*
* Copyright 2018 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
// Package grpcrand implements math/rand functions in a concurrent-safe way
// with a global random source, independent of math/rand's global source.
package grpcrand
import (
"math/rand"
"sync"
"time"
)
var (
r = rand.New(rand.NewSource(time.Now().UnixNano()))
mu sync.Mutex
)
// Int63n implements rand.Int63n on the grpcrand global source.
func Int63n(n int64) int64 {
mu.Lock()
res := r.Int63n(n)
mu.Unlock()
return res
}
// Intn implements rand.Intn on the grpcrand global source.
func Intn(n int) int {
mu.Lock()
res := r.Intn(n)
mu.Unlock()
return res
}
// Float64 implements rand.Float64 on the grpcrand global source.
func Float64() float64 {
mu.Lock()
res := r.Float64()
mu.Unlock()
return res
}

30
vendor/google.golang.org/grpc/internal/internal.go generated vendored
View File

@ -15,20 +15,22 @@
*
*/
// Package internal contains gRPC-internal code for testing, to avoid polluting
// the godoc of the top-level grpc package.
// Package internal contains gRPC-internal code, to avoid polluting
// the godoc of the top-level grpc package. It must not import any grpc
// symbols to avoid circular dependencies.
package internal
// TestingCloseConns closes all existing transports but keeps
// grpcServer.lis accepting new connections.
//
// The provided grpcServer must be of type *grpc.Server. It is untyped
// for circular dependency reasons.
var TestingCloseConns func(grpcServer interface{})
var (
// TestingUseHandlerImpl enables the http.Handler-based server implementation.
// It must be called before Serve and requires TLS credentials.
//
// The provided grpcServer must be of type *grpc.Server. It is untyped
// for circular dependency reasons.
var TestingUseHandlerImpl func(grpcServer interface{})
// TestingUseHandlerImpl enables the http.Handler-based server implementation.
// It must be called before Serve and requires TLS credentials.
//
// The provided grpcServer must be of type *grpc.Server. It is untyped
// for circular dependency reasons.
TestingUseHandlerImpl func(grpcServer interface{})
// WithContextDialer is exported by clientconn.go
WithContextDialer interface{} // func(context.Context, string) (net.Conn, error) grpc.DialOption
// WithResolverBuilder is exported by clientconn.go
WithResolverBuilder interface{} // func (resolver.Builder) grpc.DialOption
)

15
vendor/google.golang.org/grpc/transport/bdp_estimator.go → vendor/google.golang.org/grpc/internal/transport/bdp_estimator.go generated vendored
View File

@ -41,12 +41,9 @@ const (
gamma = 2
)
var (
// Adding arbitrary data to ping so that its ack can be
// identified.
// Easter-egg: what does the ping message say?
bdpPing = &ping{data: [8]byte{2, 4, 16, 16, 9, 14, 7, 7}}
)
// Adding arbitrary data to ping so that its ack can be identified.
// Easter-egg: what does the ping message say?
var bdpPing = &ping{data: [8]byte{2, 4, 16, 16, 9, 14, 7, 7}}
type bdpEstimator struct {
// sentAt is the time when the ping was sent.
@ -59,7 +56,7 @@ type bdpEstimator struct {
sample uint32
// bwMax is the maximum bandwidth noted so far (bytes/sec).
bwMax float64
// bool to keep track of the begining of a new measurement cycle.
// bool to keep track of the beginning of a new measurement cycle.
isSent bool
// Callback to update the window sizes.
updateFlowControl func(n uint32)
@ -70,7 +67,7 @@ type bdpEstimator struct {
}
// timesnap registers the time bdp ping was sent out so that
// network rtt can be calculated when its ack is recieved.
// network rtt can be calculated when its ack is received.
// It is called (by controller) when the bdpPing is
// being written on the wire.
func (b *bdpEstimator) timesnap(d [8]byte) {
@ -119,7 +116,7 @@ func (b *bdpEstimator) calculate(d [8]byte) {
b.rtt += (rttSample - b.rtt) * float64(alpha)
}
b.isSent = false
// The number of bytes accumalated so far in the sample is smaller
// The number of bytes accumulated so far in the sample is smaller
// than or equal to 1.5 times the real BDP on a saturated connection.
bwCurrent := float64(b.sample) / (b.rtt * float64(1.5))
if bwCurrent > b.bwMax {

856
vendor/google.golang.org/grpc/internal/transport/controlbuf.go generated vendored Normal file
View File

@ -0,0 +1,856 @@
/*
*
* Copyright 2014 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package transport
import (
"bytes"
"fmt"
"runtime"
"sync"
"golang.org/x/net/http2"
"golang.org/x/net/http2/hpack"
)
var updateHeaderTblSize = func(e *hpack.Encoder, v uint32) {
e.SetMaxDynamicTableSizeLimit(v)
}
type itemNode struct {
it interface{}
next *itemNode
}
type itemList struct {
head *itemNode
tail *itemNode
}
func (il *itemList) enqueue(i interface{}) {
n := &itemNode{it: i}
if il.tail == nil {
il.head, il.tail = n, n
return
}
il.tail.next = n
il.tail = n
}
// peek returns the first item in the list without removing it from the
// list.
func (il *itemList) peek() interface{} {
return il.head.it
}
func (il *itemList) dequeue() interface{} {
if il.head == nil {
return nil
}
i := il.head.it
il.head = il.head.next
if il.head == nil {
il.tail = nil
}
return i
}
func (il *itemList) dequeueAll() *itemNode {
h := il.head
il.head, il.tail = nil, nil
return h
}
func (il *itemList) isEmpty() bool {
return il.head == nil
}
// The following defines various control items which could flow through
// the control buffer of transport. They represent different aspects of
// control tasks, e.g., flow control, settings, streaming resetting, etc.
// registerStream is used to register an incoming stream with loopy writer.
type registerStream struct {
streamID uint32
wq *writeQuota
}
// headerFrame is also used to register stream on the client-side.
type headerFrame struct {
streamID uint32
hf []hpack.HeaderField
endStream bool // Valid on server side.
initStream func(uint32) (bool, error) // Used only on the client side.
onWrite func()
wq *writeQuota // write quota for the stream created.
cleanup *cleanupStream // Valid on the server side.
onOrphaned func(error) // Valid on client-side
}
type cleanupStream struct {
streamID uint32
idPtr *uint32
rst bool
rstCode http2.ErrCode
onWrite func()
}
type dataFrame struct {
streamID uint32
endStream bool
h []byte
d []byte
// onEachWrite is called every time
// a part of d is written out.
onEachWrite func()
}
type incomingWindowUpdate struct {
streamID uint32
increment uint32
}
type outgoingWindowUpdate struct {
streamID uint32
increment uint32
}
type incomingSettings struct {
ss []http2.Setting
}
type outgoingSettings struct {
ss []http2.Setting
}
type settingsAck struct {
}
type incomingGoAway struct {
}
type goAway struct {
code http2.ErrCode
debugData []byte
headsUp bool
closeConn bool
}
type ping struct {
ack bool
data [8]byte
}
type outFlowControlSizeRequest struct {
resp chan uint32
}
type outStreamState int
const (
active outStreamState = iota
empty
waitingOnStreamQuota
)
type outStream struct {
id uint32
state outStreamState
itl *itemList
bytesOutStanding int
wq *writeQuota
next *outStream
prev *outStream
}
func (s *outStream) deleteSelf() {
if s.prev != nil {
s.prev.next = s.next
}
if s.next != nil {
s.next.prev = s.prev
}
s.next, s.prev = nil, nil
}
type outStreamList struct {
// Following are sentinel objects that mark the
// beginning and end of the list. They do not
// contain any item lists. All valid objects are
// inserted in between them.
// This is needed so that an outStream object can
// deleteSelf() in O(1) time without knowing which
// list it belongs to.
head *outStream
tail *outStream
}
func newOutStreamList() *outStreamList {
head, tail := new(outStream), new(outStream)
head.next = tail
tail.prev = head
return &outStreamList{
head: head,
tail: tail,
}
}
func (l *outStreamList) enqueue(s *outStream) {
e := l.tail.prev
e.next = s
s.prev = e
s.next = l.tail
l.tail.prev = s
}
// remove from the beginning of the list.
func (l *outStreamList) dequeue() *outStream {
b := l.head.next
if b == l.tail {
return nil
}
b.deleteSelf()
return b
}
// controlBuffer is a way to pass information to loopy.
// Information is passed as specific struct types called control frames.
// A control frame not only represents data, messages or headers to be sent out
// but can also be used to instruct loopy to update its internal state.
// It shouldn't be confused with an HTTP2 frame, although some of the control frames
// like dataFrame and headerFrame do go out on wire as HTTP2 frames.
type controlBuffer struct {
ch chan struct{}
done <-chan struct{}
mu sync.Mutex
consumerWaiting bool
list *itemList
err error
}
func newControlBuffer(done <-chan struct{}) *controlBuffer {
return &controlBuffer{
ch: make(chan struct{}, 1),
list: &itemList{},
done: done,
}
}
func (c *controlBuffer) put(it interface{}) error {
_, err := c.executeAndPut(nil, it)
return err
}
func (c *controlBuffer) executeAndPut(f func(it interface{}) bool, it interface{}) (bool, error) {
var wakeUp bool
c.mu.Lock()
if c.err != nil {
c.mu.Unlock()
return false, c.err
}
if f != nil {
if !f(it) { // f wasn't successful
c.mu.Unlock()
return false, nil
}
}
if c.consumerWaiting {
wakeUp = true
c.consumerWaiting = false
}
c.list.enqueue(it)
c.mu.Unlock()
if wakeUp {
select {
case c.ch <- struct{}{}:
default:
}
}
return true, nil
}
// Note argument f should never be nil.
func (c *controlBuffer) execute(f func(it interface{}) bool, it interface{}) (bool, error) {
c.mu.Lock()
if c.err != nil {
c.mu.Unlock()
return false, c.err
}
if !f(it) { // f wasn't successful
c.mu.Unlock()
return false, nil
}
c.mu.Unlock()
return true, nil
}
func (c *controlBuffer) get(block bool) (interface{}, error) {
for {
c.mu.Lock()
if c.err != nil {
c.mu.Unlock()
return nil, c.err
}
if !c.list.isEmpty() {
h := c.list.dequeue()
c.mu.Unlock()
return h, nil
}
if !block {
c.mu.Unlock()
return nil, nil
}
c.consumerWaiting = true
c.mu.Unlock()
select {
case <-c.ch:
case <-c.done:
c.finish()
return nil, ErrConnClosing
}
}
}
func (c *controlBuffer) finish() {
c.mu.Lock()
if c.err != nil {
c.mu.Unlock()
return
}
c.err = ErrConnClosing
// There may be headers for streams in the control buffer.
// These streams need to be cleaned out since the transport
// is still not aware of these yet.
for head := c.list.dequeueAll(); head != nil; head = head.next {
hdr, ok := head.it.(*headerFrame)
if !ok {
continue
}
if hdr.onOrphaned != nil { // It will be nil on the server-side.
hdr.onOrphaned(ErrConnClosing)
}
}
c.mu.Unlock()
}
type side int
const (
clientSide side = iota
serverSide
)
// Loopy receives frames from the control buffer.
// Each frame is handled individually; most of the work done by loopy goes
// into handling data frames. Loopy maintains a queue of active streams, and each
// stream maintains a queue of data frames; as loopy receives data frames
// it gets added to the queue of the relevant stream.
// Loopy goes over this list of active streams by processing one node every iteration,
// thereby closely resemebling to a round-robin scheduling over all streams. While
// processing a stream, loopy writes out data bytes from this stream capped by the min
// of http2MaxFrameLen, connection-level flow control and stream-level flow control.
type loopyWriter struct {
side side
cbuf *controlBuffer
sendQuota uint32
oiws uint32 // outbound initial window size.
// estdStreams is map of all established streams that are not cleaned-up yet.
// On client-side, this is all streams whose headers were sent out.
// On server-side, this is all streams whose headers were received.
estdStreams map[uint32]*outStream // Established streams.
// activeStreams is a linked-list of all streams that have data to send and some
// stream-level flow control quota.
// Each of these streams internally have a list of data items(and perhaps trailers
// on the server-side) to be sent out.
activeStreams *outStreamList
framer *framer
hBuf *bytes.Buffer // The buffer for HPACK encoding.
hEnc *hpack.Encoder // HPACK encoder.
bdpEst *bdpEstimator
draining bool
// Side-specific handlers
ssGoAwayHandler func(*goAway) (bool, error)
}
func newLoopyWriter(s side, fr *framer, cbuf *controlBuffer, bdpEst *bdpEstimator) *loopyWriter {
var buf bytes.Buffer
l := &loopyWriter{
side: s,
cbuf: cbuf,
sendQuota: defaultWindowSize,
oiws: defaultWindowSize,
estdStreams: make(map[uint32]*outStream),
activeStreams: newOutStreamList(),
framer: fr,
hBuf: &buf,
hEnc: hpack.NewEncoder(&buf),
bdpEst: bdpEst,
}
return l
}
const minBatchSize = 1000
// run should be run in a separate goroutine.
// It reads control frames from controlBuf and processes them by:
// 1. Updating loopy's internal state, or/and
// 2. Writing out HTTP2 frames on the wire.
//
// Loopy keeps all active streams with data to send in a linked-list.
// All streams in the activeStreams linked-list must have both:
// 1. Data to send, and
// 2. Stream level flow control quota available.
//
// In each iteration of run loop, other than processing the incoming control
// frame, loopy calls processData, which processes one node from the activeStreams linked-list.
// This results in writing of HTTP2 frames into an underlying write buffer.
// When there's no more control frames to read from controlBuf, loopy flushes the write buffer.
// As an optimization, to increase the batch size for each flush, loopy yields the processor, once
// if the batch size is too low to give stream goroutines a chance to fill it up.
func (l *loopyWriter) run() (err error) {
defer func() {
if err == ErrConnClosing {
// Don't log ErrConnClosing as error since it happens
// 1. When the connection is closed by some other known issue.
// 2. User closed the connection.
// 3. A graceful close of connection.
infof("transport: loopyWriter.run returning. %v", err)
err = nil
}
}()
for {
it, err := l.cbuf.get(true)
if err != nil {
return err
}
if err = l.handle(it); err != nil {
return err
}
if _, err = l.processData(); err != nil {
return err
}
gosched := true
hasdata:
for {
it, err := l.cbuf.get(false)
if err != nil {
return err
}
if it != nil {
if err = l.handle(it); err != nil {
return err
}
if _, err = l.processData(); err != nil {
return err
}
continue hasdata
}
isEmpty, err := l.processData()
if err != nil {
return err
}
if !isEmpty {
continue hasdata
}
if gosched {
gosched = false
if l.framer.writer.offset < minBatchSize {
runtime.Gosched()
continue hasdata
}
}
l.framer.writer.Flush()
break hasdata
}
}
}
func (l *loopyWriter) outgoingWindowUpdateHandler(w *outgoingWindowUpdate) error {
return l.framer.fr.WriteWindowUpdate(w.streamID, w.increment)
}
func (l *loopyWriter) incomingWindowUpdateHandler(w *incomingWindowUpdate) error {
// Otherwise update the quota.
if w.streamID == 0 {
l.sendQuota += w.increment
return nil
}
// Find the stream and update it.
if str, ok := l.estdStreams[w.streamID]; ok {
str.bytesOutStanding -= int(w.increment)
if strQuota := int(l.oiws) - str.bytesOutStanding; strQuota > 0 && str.state == waitingOnStreamQuota {
str.state = active
l.activeStreams.enqueue(str)
return nil
}
}
return nil
}
func (l *loopyWriter) outgoingSettingsHandler(s *outgoingSettings) error {
return l.framer.fr.WriteSettings(s.ss...)
}
func (l *loopyWriter) incomingSettingsHandler(s *incomingSettings) error {
if err := l.applySettings(s.ss); err != nil {
return err
}
return l.framer.fr.WriteSettingsAck()
}
func (l *loopyWriter) registerStreamHandler(h *registerStream) error {
str := &outStream{
id: h.streamID,
state: empty,
itl: &itemList{},
wq: h.wq,
}
l.estdStreams[h.streamID] = str
return nil
}
func (l *loopyWriter) headerHandler(h *headerFrame) error {
if l.side == serverSide {
str, ok := l.estdStreams[h.streamID]
if !ok {
warningf("transport: loopy doesn't recognize the stream: %d", h.streamID)
return nil
}
// Case 1.A: Server is responding back with headers.
if !h.endStream {
return l.writeHeader(h.streamID, h.endStream, h.hf, h.onWrite)
}
// else: Case 1.B: Server wants to close stream.
if str.state != empty { // either active or waiting on stream quota.
// add it str's list of items.
str.itl.enqueue(h)
return nil
}
if err := l.writeHeader(h.streamID, h.endStream, h.hf, h.onWrite); err != nil {
return err
}
return l.cleanupStreamHandler(h.cleanup)
}
// Case 2: Client wants to originate stream.
str := &outStream{
id: h.streamID,
state: empty,
itl: &itemList{},
wq: h.wq,
}
str.itl.enqueue(h)
return l.originateStream(str)
}
func (l *loopyWriter) originateStream(str *outStream) error {
hdr := str.itl.dequeue().(*headerFrame)
sendPing, err := hdr.initStream(str.id)
if err != nil {
if err == ErrConnClosing {
return err
}
// Other errors(errStreamDrain) need not close transport.
return nil
}
if err = l.writeHeader(str.id, hdr.endStream, hdr.hf, hdr.onWrite); err != nil {
return err
}
l.estdStreams[str.id] = str
if sendPing {
return l.pingHandler(&ping{data: [8]byte{}})
}
return nil
}
func (l *loopyWriter) writeHeader(streamID uint32, endStream bool, hf []hpack.HeaderField, onWrite func()) error {
if onWrite != nil {
onWrite()
}
l.hBuf.Reset()
for _, f := range hf {
if err := l.hEnc.WriteField(f); err != nil {
warningf("transport: loopyWriter.writeHeader encountered error while encoding headers:", err)
}
}
var (
err error
endHeaders, first bool
)
first = true
for !endHeaders {
size := l.hBuf.Len()
if size > http2MaxFrameLen {
size = http2MaxFrameLen
} else {
endHeaders = true
}
if first {
first = false
err = l.framer.fr.WriteHeaders(http2.HeadersFrameParam{
StreamID: streamID,
BlockFragment: l.hBuf.Next(size),
EndStream: endStream,
EndHeaders: endHeaders,
})
} else {
err = l.framer.fr.WriteContinuation(
streamID,
endHeaders,
l.hBuf.Next(size),
)
}
if err != nil {
return err
}
}
return nil
}
func (l *loopyWriter) preprocessData(df *dataFrame) error {
str, ok := l.estdStreams[df.streamID]
if !ok {
return nil
}
// If we got data for a stream it means that
// stream was originated and the headers were sent out.
str.itl.enqueue(df)
if str.state == empty {
str.state = active
l.activeStreams.enqueue(str)
}
return nil
}
func (l *loopyWriter) pingHandler(p *ping) error {
if !p.ack {
l.bdpEst.timesnap(p.data)
}
return l.framer.fr.WritePing(p.ack, p.data)
}
func (l *loopyWriter) outFlowControlSizeRequestHandler(o *outFlowControlSizeRequest) error {
o.resp <- l.sendQuota
return nil
}
func (l *loopyWriter) cleanupStreamHandler(c *cleanupStream) error {
c.onWrite()
if str, ok := l.estdStreams[c.streamID]; ok {
// On the server side it could be a trailers-only response or
// a RST_STREAM before stream initialization thus the stream might
// not be established yet.
delete(l.estdStreams, c.streamID)
str.deleteSelf()
}
if c.rst { // If RST_STREAM needs to be sent.
if err := l.framer.fr.WriteRSTStream(c.streamID, c.rstCode); err != nil {
return err
}
}
if l.side == clientSide && l.draining && len(l.estdStreams) == 0 {
return ErrConnClosing
}
return nil
}
func (l *loopyWriter) incomingGoAwayHandler(*incomingGoAway) error {
if l.side == clientSide {
l.draining = true
if len(l.estdStreams) == 0 {
return ErrConnClosing
}
}
return nil
}
func (l *loopyWriter) goAwayHandler(g *goAway) error {
// Handling of outgoing GoAway is very specific to side.
if l.ssGoAwayHandler != nil {
draining, err := l.ssGoAwayHandler(g)
if err != nil {
return err
}
l.draining = draining
}
return nil
}
func (l *loopyWriter) handle(i interface{}) error {
switch i := i.(type) {
case *incomingWindowUpdate:
return l.incomingWindowUpdateHandler(i)
case *outgoingWindowUpdate:
return l.outgoingWindowUpdateHandler(i)
case *incomingSettings:
return l.incomingSettingsHandler(i)
case *outgoingSettings:
return l.outgoingSettingsHandler(i)
case *headerFrame:
return l.headerHandler(i)
case *registerStream:
return l.registerStreamHandler(i)
case *cleanupStream:
return l.cleanupStreamHandler(i)
case *incomingGoAway:
return l.incomingGoAwayHandler(i)
case *dataFrame:
return l.preprocessData(i)
case *ping:
return l.pingHandler(i)
case *goAway:
return l.goAwayHandler(i)
case *outFlowControlSizeRequest:
return l.outFlowControlSizeRequestHandler(i)
default:
return fmt.Errorf("transport: unknown control message type %T", i)
}
}
func (l *loopyWriter) applySettings(ss []http2.Setting) error {
for _, s := range ss {
switch s.ID {
case http2.SettingInitialWindowSize:
o := l.oiws
l.oiws = s.Val
if o < l.oiws {
// If the new limit is greater make all depleted streams active.
for _, stream := range l.estdStreams {
if stream.state == waitingOnStreamQuota {
stream.state = active
l.activeStreams.enqueue(stream)
}
}
}
case http2.SettingHeaderTableSize:
updateHeaderTblSize(l.hEnc, s.Val)
}
}
return nil
}
// processData removes the first stream from active streams, writes out at most 16KB
// of its data and then puts it at the end of activeStreams if there's still more data
// to be sent and stream has some stream-level flow control.
func (l *loopyWriter) processData() (bool, error) {
if l.sendQuota == 0 {
return true, nil
}
str := l.activeStreams.dequeue() // Remove the first stream.
if str == nil {
return true, nil
}
dataItem := str.itl.peek().(*dataFrame) // Peek at the first data item this stream.
// A data item is represented by a dataFrame, since it later translates into
// multiple HTTP2 data frames.
// Every dataFrame has two buffers; h that keeps grpc-message header and d that is acutal data.
// As an optimization to keep wire traffic low, data from d is copied to h to make as big as the
// maximum possilbe HTTP2 frame size.
if len(dataItem.h) == 0 && len(dataItem.d) == 0 { // Empty data frame
// Client sends out empty data frame with endStream = true
if err := l.framer.fr.WriteData(dataItem.streamID, dataItem.endStream, nil); err != nil {
return false, err
}
str.itl.dequeue() // remove the empty data item from stream
if str.itl.isEmpty() {
str.state = empty
} else if trailer, ok := str.itl.peek().(*headerFrame); ok { // the next item is trailers.
if err := l.writeHeader(trailer.streamID, trailer.endStream, trailer.hf, trailer.onWrite); err != nil {
return false, err
}
if err := l.cleanupStreamHandler(trailer.cleanup); err != nil {
return false, nil
}
} else {
l.activeStreams.enqueue(str)
}
return false, nil
}
var (
idx int
buf []byte
)
if len(dataItem.h) != 0 { // data header has not been written out yet.
buf = dataItem.h
} else {
idx = 1
buf = dataItem.d
}
size := http2MaxFrameLen
if len(buf) < size {
size = len(buf)
}
if strQuota := int(l.oiws) - str.bytesOutStanding; strQuota <= 0 { // stream-level flow control.
str.state = waitingOnStreamQuota
return false, nil
} else if strQuota < size {
size = strQuota
}
if l.sendQuota < uint32(size) { // connection-level flow control.
size = int(l.sendQuota)
}
// Now that outgoing flow controls are checked we can replenish str's write quota
str.wq.replenish(size)
var endStream bool
// If this is the last data message on this stream and all of it can be written in this iteration.
if dataItem.endStream && size == len(buf) {
// buf contains either data or it contains header but data is empty.
if idx == 1 || len(dataItem.d) == 0 {
endStream = true
}
}
if dataItem.onEachWrite != nil {
dataItem.onEachWrite()
}
if err := l.framer.fr.WriteData(dataItem.streamID, endStream, buf[:size]); err != nil {
return false, err
}
buf = buf[size:]
str.bytesOutStanding += size
l.sendQuota -= uint32(size)
if idx == 0 {
dataItem.h = buf
} else {
dataItem.d = buf
}
if len(dataItem.h) == 0 && len(dataItem.d) == 0 { // All the data from that message was written out.
str.itl.dequeue()
}
if str.itl.isEmpty() {
str.state = empty
} else if trailer, ok := str.itl.peek().(*headerFrame); ok { // The next item is trailers.
if err := l.writeHeader(trailer.streamID, trailer.endStream, trailer.hf, trailer.onWrite); err != nil {
return false, err
}
if err := l.cleanupStreamHandler(trailer.cleanup); err != nil {
return false, err
}
} else if int(l.oiws)-str.bytesOutStanding <= 0 { // Ran out of stream quota.
str.state = waitingOnStreamQuota
} else { // Otherwise add it back to the list of active streams.
l.activeStreams.enqueue(str)
}
return false, nil
}

49
vendor/google.golang.org/grpc/internal/transport/defaults.go generated vendored Normal file
View File

@ -0,0 +1,49 @@
/*
*
* Copyright 2018 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package transport
import (
"math"
"time"
)
const (
// The default value of flow control window size in HTTP2 spec.
defaultWindowSize = 65535
// The initial window size for flow control.
initialWindowSize = defaultWindowSize // for an RPC
infinity = time.Duration(math.MaxInt64)
defaultClientKeepaliveTime = infinity
defaultClientKeepaliveTimeout = 20 * time.Second
defaultMaxStreamsClient = 100
defaultMaxConnectionIdle = infinity
defaultMaxConnectionAge = infinity
defaultMaxConnectionAgeGrace = infinity
defaultServerKeepaliveTime = 2 * time.Hour
defaultServerKeepaliveTimeout = 20 * time.Second
defaultKeepalivePolicyMinTime = 5 * time.Minute
// max window limit set by HTTP2 Specs.
maxWindowSize = math.MaxInt32
// defaultWriteQuota is the default value for number of data
// bytes that each stream can schedule before some of it being
// flushed out.
defaultWriteQuota = 64 * 1024
defaultClientMaxHeaderListSize = uint32(16 << 20)
defaultServerMaxHeaderListSize = uint32(16 << 20)
)

220
vendor/google.golang.org/grpc/transport/control.go → vendor/google.golang.org/grpc/internal/transport/flowcontrol.go generated vendored
View File

@ -22,128 +22,102 @@ import (
"fmt"
"math"
"sync"
"time"
"golang.org/x/net/http2"
"sync/atomic"
)
const (
// The default value of flow control window size in HTTP2 spec.
defaultWindowSize = 65535
// The initial window size for flow control.
initialWindowSize = defaultWindowSize // for an RPC
infinity = time.Duration(math.MaxInt64)
defaultClientKeepaliveTime = infinity
defaultClientKeepaliveTimeout = time.Duration(20 * time.Second)
defaultMaxStreamsClient = 100
defaultMaxConnectionIdle = infinity
defaultMaxConnectionAge = infinity
defaultMaxConnectionAgeGrace = infinity
defaultServerKeepaliveTime = time.Duration(2 * time.Hour)
defaultServerKeepaliveTimeout = time.Duration(20 * time.Second)
defaultKeepalivePolicyMinTime = time.Duration(5 * time.Minute)
// max window limit set by HTTP2 Specs.
maxWindowSize = math.MaxInt32
)
// The following defines various control items which could flow through
// the control buffer of transport. They represent different aspects of
// control tasks, e.g., flow control, settings, streaming resetting, etc.
type windowUpdate struct {
streamID uint32
increment uint32
flush bool
// writeQuota is a soft limit on the amount of data a stream can
// schedule before some of it is written out.
type writeQuota struct {
quota int32
// get waits on read from when quota goes less than or equal to zero.
// replenish writes on it when quota goes positive again.
ch chan struct{}
// done is triggered in error case.
done <-chan struct{}
// replenish is called by loopyWriter to give quota back to.
// It is implemented as a field so that it can be updated
// by tests.
replenish func(n int)
}
func (*windowUpdate) item() {}
type settings struct {
ack bool
ss []http2.Setting
}
func (*settings) item() {}
type resetStream struct {
streamID uint32
code http2.ErrCode
}
func (*resetStream) item() {}
type goAway struct {
code http2.ErrCode
debugData []byte
headsUp bool
closeConn bool
}
func (*goAway) item() {}
type flushIO struct {
}
func (*flushIO) item() {}
type ping struct {
ack bool
data [8]byte
}
func (*ping) item() {}
// quotaPool is a pool which accumulates the quota and sends it to acquire()
// when it is available.
type quotaPool struct {
c chan int
mu sync.Mutex
quota int
}
// newQuotaPool creates a quotaPool which has quota q available to consume.
func newQuotaPool(q int) *quotaPool {
qb := &quotaPool{
c: make(chan int, 1),
func newWriteQuota(sz int32, done <-chan struct{}) *writeQuota {
w := &writeQuota{
quota: sz,
ch: make(chan struct{}, 1),
done: done,
}
if q > 0 {
qb.c <- q
} else {
qb.quota = q
}
return qb
w.replenish = w.realReplenish
return w
}
// add cancels the pending quota sent on acquired, incremented by v and sends
// it back on acquire.
func (qb *quotaPool) add(v int) {
qb.mu.Lock()
defer qb.mu.Unlock()
select {
case n := <-qb.c:
qb.quota += n
default:
}
qb.quota += v
if qb.quota <= 0 {
return
}
// After the pool has been created, this is the only place that sends on
// the channel. Since mu is held at this point and any quota that was sent
// on the channel has been retrieved, we know that this code will always
// place any positive quota value on the channel.
select {
case qb.c <- qb.quota:
qb.quota = 0
default:
func (w *writeQuota) get(sz int32) error {
for {
if atomic.LoadInt32(&w.quota) > 0 {
atomic.AddInt32(&w.quota, -sz)
return nil
}
select {
case <-w.ch:
continue
case <-w.done:
return errStreamDone
}
}
}
// acquire returns the channel on which available quota amounts are sent.
func (qb *quotaPool) acquire() <-chan int {
return qb.c
func (w *writeQuota) realReplenish(n int) {
sz := int32(n)
a := atomic.AddInt32(&w.quota, sz)
b := a - sz
if b <= 0 && a > 0 {
select {
case w.ch <- struct{}{}:
default:
}
}
}
type trInFlow struct {
limit uint32
unacked uint32
effectiveWindowSize uint32
}
func (f *trInFlow) newLimit(n uint32) uint32 {
d := n - f.limit
f.limit = n
f.updateEffectiveWindowSize()
return d
}
func (f *trInFlow) onData(n uint32) uint32 {
f.unacked += n
if f.unacked >= f.limit/4 {
w := f.unacked
f.unacked = 0
f.updateEffectiveWindowSize()
return w
}
f.updateEffectiveWindowSize()
return 0
}
func (f *trInFlow) reset() uint32 {
w := f.unacked
f.unacked = 0
f.updateEffectiveWindowSize()
return w
}
func (f *trInFlow) updateEffectiveWindowSize() {
atomic.StoreUint32(&f.effectiveWindowSize, f.limit-f.unacked)
}
func (f *trInFlow) getSize() uint32 {
return atomic.LoadUint32(&f.effectiveWindowSize)
}
// TODO(mmukhi): Simplify this code.
// inFlow deals with inbound flow control
type inFlow struct {
mu sync.Mutex
@ -164,9 +138,9 @@ type inFlow struct {
// It assumes that n is always greater than the old limit.
func (f *inFlow) newLimit(n uint32) uint32 {
f.mu.Lock()
defer f.mu.Unlock()
d := n - f.limit
f.limit = n
f.mu.Unlock()
return d
}
@ -175,7 +149,6 @@ func (f *inFlow) maybeAdjust(n uint32) uint32 {
n = uint32(math.MaxInt32)
}
f.mu.Lock()
defer f.mu.Unlock()
// estSenderQuota is the receiver's view of the maximum number of bytes the sender
// can send without a window update.
estSenderQuota := int32(f.limit - (f.pendingData + f.pendingUpdate))
@ -187,7 +160,7 @@ func (f *inFlow) maybeAdjust(n uint32) uint32 {
// for this message. Therefore we must send an update over the limit since there's an active read
// request from the application.
if estUntransmittedData > estSenderQuota {
// Sender's window shouldn't go more than 2^31 - 1 as speecified in the HTTP spec.
// Sender's window shouldn't go more than 2^31 - 1 as specified in the HTTP spec.
if f.limit+n > maxWindowSize {
f.delta = maxWindowSize - f.limit
} else {
@ -196,19 +169,24 @@ func (f *inFlow) maybeAdjust(n uint32) uint32 {
// is padded; We will fallback on the current available window(at least a 1/4th of the limit).
f.delta = n
}
f.mu.Unlock()
return f.delta
}
f.mu.Unlock()
return 0
}
// onData is invoked when some data frame is received. It updates pendingData.
func (f *inFlow) onData(n uint32) error {
f.mu.Lock()
defer f.mu.Unlock()
f.pendingData += n
if f.pendingData+f.pendingUpdate > f.limit+f.delta {
return fmt.Errorf("received %d-bytes data exceeding the limit %d bytes", f.pendingData+f.pendingUpdate, f.limit)
limit := f.limit
rcvd := f.pendingData + f.pendingUpdate
f.mu.Unlock()
return fmt.Errorf("received %d-bytes data exceeding the limit %d bytes", rcvd, limit)
}
f.mu.Unlock()
return nil
}
@ -216,8 +194,8 @@ func (f *inFlow) onData(n uint32) error {
// to be sent to the peer.
func (f *inFlow) onRead(n uint32) uint32 {
f.mu.Lock()
defer f.mu.Unlock()
if f.pendingData == 0 {
f.mu.Unlock()
return 0
}
f.pendingData -= n
@ -232,15 +210,9 @@ func (f *inFlow) onRead(n uint32) uint32 {
if f.pendingUpdate >= f.limit/4 {
wu := f.pendingUpdate
f.pendingUpdate = 0
f.mu.Unlock()
return wu
}
f.mu.Unlock()
return 0
}
func (f *inFlow) resetPendingUpdate() uint32 {
f.mu.Lock()
defer f.mu.Unlock()
n := f.pendingUpdate
f.pendingUpdate = 0
return n
}

17
vendor/google.golang.org/grpc/transport/go16.go → vendor/google.golang.org/grpc/internal/transport/go16.go generated vendored
View File

@ -22,8 +22,10 @@ package transport
import (
"net"
"net/http"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
"golang.org/x/net/context"
)
@ -33,13 +35,18 @@ func dialContext(ctx context.Context, network, address string) (net.Conn, error)
return (&net.Dialer{Cancel: ctx.Done()}).Dial(network, address)
}
// ContextErr converts the error from context package into a StreamError.
func ContextErr(err error) StreamError {
// ContextErr converts the error from context package into a status error.
func ContextErr(err error) error {
switch err {
case context.DeadlineExceeded:
return streamErrorf(codes.DeadlineExceeded, "%v", err)
return status.Error(codes.DeadlineExceeded, err.Error())
case context.Canceled:
return streamErrorf(codes.Canceled, "%v", err)
return status.Error(codes.Canceled, err.Error())
}
return streamErrorf(codes.Internal, "Unexpected error from context packet: %v", err)
return status.Errorf(codes.Internal, "Unexpected error from context packet: %v", err)
}
// contextFromRequest returns a background context.
func contextFromRequest(r *http.Request) context.Context {
return context.Background()
}

17
vendor/google.golang.org/grpc/transport/go17.go → vendor/google.golang.org/grpc/internal/transport/go17.go generated vendored
View File

@ -23,8 +23,10 @@ package transport
import (
"context"
"net"
"net/http"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
netctx "golang.org/x/net/context"
)
@ -34,13 +36,18 @@ func dialContext(ctx context.Context, network, address string) (net.Conn, error)
return (&net.Dialer{}).DialContext(ctx, network, address)
}
// ContextErr converts the error from context package into a StreamError.
func ContextErr(err error) StreamError {
// ContextErr converts the error from context package into a status error.
func ContextErr(err error) error {
switch err {
case context.DeadlineExceeded, netctx.DeadlineExceeded:
return streamErrorf(codes.DeadlineExceeded, "%v", err)
return status.Error(codes.DeadlineExceeded, err.Error())
case context.Canceled, netctx.Canceled:
return streamErrorf(codes.Canceled, "%v", err)
return status.Error(codes.Canceled, err.Error())
}
return streamErrorf(codes.Internal, "Unexpected error from context packet: %v", err)
return status.Errorf(codes.Internal, "Unexpected error from context packet: %v", err)
}
// contextFromRequest returns a context from the HTTP Request.
func contextFromRequest(r *http.Request) context.Context {
return r.Context()
}

129
vendor/google.golang.org/grpc/transport/handler_server.go → vendor/google.golang.org/grpc/internal/transport/handler_server.go generated vendored
View File

@ -33,26 +33,31 @@ import (
"sync"
"time"
"github.com/golang/protobuf/proto"
"golang.org/x/net/context"
"golang.org/x/net/http2"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/credentials"
"google.golang.org/grpc/metadata"
"google.golang.org/grpc/peer"
"google.golang.org/grpc/stats"
"google.golang.org/grpc/status"
)
// NewServerHandlerTransport returns a ServerTransport handling gRPC
// from inside an http.Handler. It requires that the http Server
// supports HTTP/2.
func NewServerHandlerTransport(w http.ResponseWriter, r *http.Request) (ServerTransport, error) {
func NewServerHandlerTransport(w http.ResponseWriter, r *http.Request, stats stats.Handler) (ServerTransport, error) {
if r.ProtoMajor != 2 {
return nil, errors.New("gRPC requires HTTP/2")
}
if r.Method != "POST" {
return nil, errors.New("invalid gRPC request method")
}
if !validContentType(r.Header.Get("Content-Type")) {
contentType := r.Header.Get("Content-Type")
// TODO: do we assume contentType is lowercase? we did before
contentSubtype, validContentType := contentSubtype(contentType)
if !validContentType {
return nil, errors.New("invalid gRPC request content-type")
}
if _, ok := w.(http.Flusher); !ok {
@ -63,34 +68,37 @@ func NewServerHandlerTransport(w http.ResponseWriter, r *http.Request) (ServerTr
}
st := &serverHandlerTransport{
rw: w,
req: r,
closedCh: make(chan struct{}),
writes: make(chan func()),
rw: w,
req: r,
closedCh: make(chan struct{}),
writes: make(chan func()),
contentType: contentType,
contentSubtype: contentSubtype,
stats: stats,
}
if v := r.Header.Get("grpc-timeout"); v != "" {
to, err := decodeTimeout(v)
if err != nil {
return nil, streamErrorf(codes.Internal, "malformed time-out: %v", err)
return nil, status.Errorf(codes.Internal, "malformed time-out: %v", err)
}
st.timeoutSet = true
st.timeout = to
}
var metakv []string
metakv := []string{"content-type", contentType}
if r.Host != "" {
metakv = append(metakv, ":authority", r.Host)
}
for k, vv := range r.Header {
k = strings.ToLower(k)
if isReservedHeader(k) && !isWhitelistedPseudoHeader(k) {
if isReservedHeader(k) && !isWhitelistedHeader(k) {
continue
}
for _, v := range vv {
v, err := decodeMetadataHeader(k, v)
if err != nil {
return nil, streamErrorf(codes.InvalidArgument, "malformed binary metadata: %v", err)
return nil, status.Errorf(codes.Internal, "malformed binary metadata: %v", err)
}
metakv = append(metakv, k, v)
}
@ -121,6 +129,18 @@ type serverHandlerTransport struct {
// ServeHTTP (HandleStreams) goroutine. The channel is closed
// when WriteStatus is called.
writes chan func()
// block concurrent WriteStatus calls
// e.g. grpc/(*serverStream).SendMsg/RecvMsg
writeStatusMu sync.Mutex
// we just mirror the request content-type
contentType string
// we store both contentType and contentSubtype so we don't keep recreating them
// TODO make sure this is consistent across handler_server and http2_server
contentSubtype string
stats stats.Handler
}
func (ht *serverHandlerTransport) Close() error {
@ -167,11 +187,13 @@ func (ht *serverHandlerTransport) do(fn func()) error {
case <-ht.closedCh:
return ErrConnClosing
}
}
}
func (ht *serverHandlerTransport) WriteStatus(s *Stream, st *status.Status) error {
ht.writeStatusMu.Lock()
defer ht.writeStatusMu.Unlock()
err := ht.do(func() {
ht.writeCommonHeaders(s)
@ -186,7 +208,15 @@ func (ht *serverHandlerTransport) WriteStatus(s *Stream, st *status.Status) erro
h.Set("Grpc-Message", encodeGrpcMessage(m))
}
// TODO: Support Grpc-Status-Details-Bin
if p := st.Proto(); p != nil && len(p.Details) > 0 {
stBytes, err := proto.Marshal(p)
if err != nil {
// TODO: return error instead, when callers are able to handle it.
panic(err)
}
h.Set("Grpc-Status-Details-Bin", encodeBinHeader(stBytes))
}
if md := s.Trailer(); len(md) > 0 {
for k, vv := range md {
@ -202,7 +232,14 @@ func (ht *serverHandlerTransport) WriteStatus(s *Stream, st *status.Status) erro
}
}
})
close(ht.writes)
if err == nil { // transport has not been closed
if ht.stats != nil {
ht.stats.HandleRPC(s.Context(), &stats.OutTrailer{})
}
ht.Close()
close(ht.writes)
}
return err
}
@ -216,7 +253,7 @@ func (ht *serverHandlerTransport) writeCommonHeaders(s *Stream) {
h := ht.rw.Header()
h["Date"] = nil // suppress Date to make tests happy; TODO: restore
h.Set("Content-Type", "application/grpc")
h.Set("Content-Type", ht.contentType)
// Predeclare trailers we'll set later in WriteStatus (after the body).
// This is a SHOULD in the HTTP RFC, and the way you add (known)
@ -225,25 +262,24 @@ func (ht *serverHandlerTransport) writeCommonHeaders(s *Stream) {
// and https://golang.org/pkg/net/http/#example_ResponseWriter_trailers
h.Add("Trailer", "Grpc-Status")
h.Add("Trailer", "Grpc-Message")
// TODO: Support Grpc-Status-Details-Bin
h.Add("Trailer", "Grpc-Status-Details-Bin")
if s.sendCompress != "" {
h.Set("Grpc-Encoding", s.sendCompress)
}
}
func (ht *serverHandlerTransport) Write(s *Stream, data []byte, opts *Options) error {
func (ht *serverHandlerTransport) Write(s *Stream, hdr []byte, data []byte, opts *Options) error {
return ht.do(func() {
ht.writeCommonHeaders(s)
ht.rw.Write(hdr)
ht.rw.Write(data)
if !opts.Delay {
ht.rw.(http.Flusher).Flush()
}
ht.rw.(http.Flusher).Flush()
})
}
func (ht *serverHandlerTransport) WriteHeader(s *Stream, md metadata.MD) error {
return ht.do(func() {
err := ht.do(func() {
ht.writeCommonHeaders(s)
h := ht.rw.Header()
for k, vv := range md {
@ -259,17 +295,24 @@ func (ht *serverHandlerTransport) WriteHeader(s *Stream, md metadata.MD) error {
ht.rw.WriteHeader(200)
ht.rw.(http.Flusher).Flush()
})
if err == nil {
if ht.stats != nil {
ht.stats.HandleRPC(s.Context(), &stats.OutHeader{})
}
}
return err
}
func (ht *serverHandlerTransport) HandleStreams(startStream func(*Stream), traceCtx func(context.Context, string) context.Context) {
// With this transport type there will be exactly 1 stream: this HTTP request.
var ctx context.Context
ctx := contextFromRequest(ht.req)
var cancel context.CancelFunc
if ht.timeoutSet {
ctx, cancel = context.WithTimeout(context.Background(), ht.timeout)
ctx, cancel = context.WithTimeout(ctx, ht.timeout)
} else {
ctx, cancel = context.WithCancel(context.Background())
ctx, cancel = context.WithCancel(ctx)
}
// requestOver is closed when either the request's context is done
@ -293,13 +336,14 @@ func (ht *serverHandlerTransport) HandleStreams(startStream func(*Stream), trace
req := ht.req
s := &Stream{
id: 0, // irrelevant
requestRead: func(int) {},
cancel: cancel,
buf: newRecvBuffer(),
st: ht,
method: req.URL.Path,
recvCompress: req.Header.Get("grpc-encoding"),
id: 0, // irrelevant
requestRead: func(int) {},
cancel: cancel,
buf: newRecvBuffer(),
st: ht,
method: req.URL.Path,
recvCompress: req.Header.Get("grpc-encoding"),
contentSubtype: ht.contentSubtype,
}
pr := &peer.Peer{
Addr: ht.RemoteAddr(),
@ -308,10 +352,18 @@ func (ht *serverHandlerTransport) HandleStreams(startStream func(*Stream), trace
pr.AuthInfo = credentials.TLSInfo{State: *req.TLS}
}
ctx = metadata.NewIncomingContext(ctx, ht.headerMD)
ctx = peer.NewContext(ctx, pr)
s.ctx = newContextWithStream(ctx, s)
s.ctx = peer.NewContext(ctx, pr)
if ht.stats != nil {
s.ctx = ht.stats.TagRPC(s.ctx, &stats.RPCTagInfo{FullMethodName: s.method})
inHeader := &stats.InHeader{
FullMethod: s.method,
RemoteAddr: ht.RemoteAddr(),
Compression: s.recvCompress,
}
ht.stats.HandleRPC(s.ctx, inHeader)
}
s.trReader = &transportReader{
reader: &recvBufferReader{ctx: s.ctx, recv: s.buf},
reader: &recvBufferReader{ctx: s.ctx, ctxDone: s.ctx.Done(), recv: s.buf},
windowHandler: func(int) {},
}
@ -366,6 +418,10 @@ func (ht *serverHandlerTransport) runStream() {
}
}
func (ht *serverHandlerTransport) IncrMsgSent() {}
func (ht *serverHandlerTransport) IncrMsgRecv() {}
func (ht *serverHandlerTransport) Drain() {
panic("Drain() is not implemented")
}
@ -376,17 +432,14 @@ func (ht *serverHandlerTransport) Drain() {
// * io.EOF
// * io.ErrUnexpectedEOF
// * of type transport.ConnectionError
// * of type transport.StreamError
// * an error from the status package
func mapRecvMsgError(err error) error {
if err == io.EOF || err == io.ErrUnexpectedEOF {
return err
}
if se, ok := err.(http2.StreamError); ok {
if code, ok := http2ErrConvTab[se.Code]; ok {
return StreamError{
Code: code,
Desc: se.Error(),
}
return status.Error(code, se.Error())
}
}
return connectionErrorf(true, err, err.Error())

1360
vendor/google.golang.org/grpc/internal/transport/http2_client.go generated vendored Normal file
View File

File diff suppressed because it is too large Load Diff

1064
vendor/google.golang.org/grpc/transport/http2_server.go → vendor/google.golang.org/grpc/internal/transport/http2_server.go generated vendored
View File

File diff suppressed because it is too large Load Diff

404
vendor/google.golang.org/grpc/transport/http_util.go → vendor/google.golang.org/grpc/internal/transport/http_util.go generated vendored
View File

@ -28,8 +28,8 @@ import (
"net/http"
"strconv"
"strings"
"sync/atomic"
"time"
"unicode/utf8"
"github.com/golang/protobuf/proto"
"golang.org/x/net/http2"
@ -44,8 +44,12 @@ const (
http2MaxFrameLen = 16384 // 16KB frame
// http://http2.github.io/http2-spec/#SettingValues
http2InitHeaderTableSize = 4096
// http2IOBufSize specifies the buffer size for sending frames.
http2IOBufSize = 32 * 1024
// baseContentType is the base content-type for gRPC. This is a valid
// content-type on it's own, but can also include a content-subtype such as
// "proto" as a suffix after "+" or ";". See
// https://github.com/grpc/grpc/blob/master/doc/PROTOCOL-HTTP2.md#requests
// for more details.
baseContentType = "application/grpc"
)
var (
@ -64,7 +68,7 @@ var (
http2.ErrCodeConnect: codes.Internal,
http2.ErrCodeEnhanceYourCalm: codes.ResourceExhausted,
http2.ErrCodeInadequateSecurity: codes.PermissionDenied,
http2.ErrCodeHTTP11Required: codes.FailedPrecondition,
http2.ErrCodeHTTP11Required: codes.Internal,
}
statusCodeConvTab = map[codes.Code]http2.ErrCode{
codes.Internal: http2.ErrCodeInternal,
@ -111,7 +115,12 @@ type decodeState struct {
timeout time.Duration
method string
// key-value metadata map from the peer.
mdata map[string][]string
mdata map[string][]string
statsTags []byte
statsTrace []byte
contentSubtype string
// whether decoding on server side or not
serverSide bool
}
// isReservedHeader checks whether hdr belongs to HTTP2 headers
@ -123,12 +132,16 @@ func isReservedHeader(hdr string) bool {
}
switch hdr {
case "content-type",
"user-agent",
"grpc-message-type",
"grpc-encoding",
"grpc-message",
"grpc-status",
"grpc-timeout",
"grpc-status-details-bin",
// Intentionally exclude grpc-previous-rpc-attempts and
// grpc-retry-pushback-ms, which are "reserved", but their API
// intentionally works via metadata.
"te":
return true
default:
@ -136,28 +149,55 @@ func isReservedHeader(hdr string) bool {
}
}
// isWhitelistedPseudoHeader checks whether hdr belongs to HTTP2 pseudoheaders
// that should be propagated into metadata visible to users.
func isWhitelistedPseudoHeader(hdr string) bool {
// isWhitelistedHeader checks whether hdr should be propagated into metadata
// visible to users, even though it is classified as "reserved", above.
func isWhitelistedHeader(hdr string) bool {
switch hdr {
case ":authority":
case ":authority", "user-agent":
return true
default:
return false
}
}
func validContentType(t string) bool {
e := "application/grpc"
if !strings.HasPrefix(t, e) {
return false
// contentSubtype returns the content-subtype for the given content-type. The
// given content-type must be a valid content-type that starts with
// "application/grpc". A content-subtype will follow "application/grpc" after a
// "+" or ";". See
// https://github.com/grpc/grpc/blob/master/doc/PROTOCOL-HTTP2.md#requests for
// more details.
//
// If contentType is not a valid content-type for gRPC, the boolean
// will be false, otherwise true. If content-type == "application/grpc",
// "application/grpc+", or "application/grpc;", the boolean will be true,
// but no content-subtype will be returned.
//
// contentType is assumed to be lowercase already.
func contentSubtype(contentType string) (string, bool) {
if contentType == baseContentType {
return "", true
}
// Support variations on the content-type
// (e.g. "application/grpc+blah", "application/grpc;blah").
if len(t) > len(e) && t[len(e)] != '+' && t[len(e)] != ';' {
return false
if !strings.HasPrefix(contentType, baseContentType) {
return "", false
}
return true
// guaranteed since != baseContentType and has baseContentType prefix
switch contentType[len(baseContentType)] {
case '+', ';':
// this will return true for "application/grpc+" or "application/grpc;"
// which the previous validContentType function tested to be valid, so we
// just say that no content-subtype is specified in this case
return contentType[len(baseContentType)+1:], true
default:
return "", false
}
}
// contentSubtype is assumed to be lowercase
func contentType(contentSubtype string) string {
if contentSubtype == "" {
return baseContentType
}
return baseContentType + "+" + contentSubtype
}
func (d *decodeState) status() *status.Status {
@ -197,13 +237,22 @@ func decodeMetadataHeader(k, v string) (string, error) {
return v, nil
}
func (d *decodeState) decodeResponseHeader(frame *http2.MetaHeadersFrame) error {
func (d *decodeState) decodeHeader(frame *http2.MetaHeadersFrame) error {
// frame.Truncated is set to true when framer detects that the current header
// list size hits MaxHeaderListSize limit.
if frame.Truncated {
return status.Error(codes.Internal, "peer header list size exceeded limit")
}
for _, hf := range frame.Fields {
if err := d.processHeaderField(hf); err != nil {
return err
}
}
if d.serverSide {
return nil
}
// If grpc status exists, no need to check further.
if d.rawStatusCode != nil || d.statusGen != nil {
return nil
@ -212,7 +261,7 @@ func (d *decodeState) decodeResponseHeader(frame *http2.MetaHeadersFrame) error
// If grpc status doesn't exist and http status doesn't exist,
// then it's a malformed header.
if d.httpStatus == nil {
return streamErrorf(codes.Internal, "malformed header: doesn't contain status(gRPC or HTTP)")
return status.Error(codes.Internal, "malformed header: doesn't contain status(gRPC or HTTP)")
}
if *(d.httpStatus) != http.StatusOK {
@ -220,33 +269,46 @@ func (d *decodeState) decodeResponseHeader(frame *http2.MetaHeadersFrame) error
if !ok {
code = codes.Unknown
}
return streamErrorf(code, http.StatusText(*(d.httpStatus)))
return status.Error(code, http.StatusText(*(d.httpStatus)))
}
// gRPC status doesn't exist and http status is OK.
// Set rawStatusCode to be unknown and return nil error.
// So that, if the stream has ended this Unknown status
// will be propogated to the user.
// will be propagated to the user.
// Otherwise, it will be ignored. In which case, status from
// a later trailer, that has StreamEnded flag set, is propogated.
// a later trailer, that has StreamEnded flag set, is propagated.
code := int(codes.Unknown)
d.rawStatusCode = &code
return nil
}
func (d *decodeState) addMetadata(k, v string) {
if d.mdata == nil {
d.mdata = make(map[string][]string)
}
d.mdata[k] = append(d.mdata[k], v)
}
func (d *decodeState) processHeaderField(f hpack.HeaderField) error {
switch f.Name {
case "content-type":
if !validContentType(f.Value) {
return streamErrorf(codes.FailedPrecondition, "transport: received the unexpected content-type %q", f.Value)
contentSubtype, validContentType := contentSubtype(f.Value)
if !validContentType {
return status.Errorf(codes.Internal, "transport: received the unexpected content-type %q", f.Value)
}
d.contentSubtype = contentSubtype
// TODO: do we want to propagate the whole content-type in the metadata,
// or come up with a way to just propagate the content-subtype if it was set?
// ie {"content-type": "application/grpc+proto"} or {"content-subtype": "proto"}
// in the metadata?
d.addMetadata(f.Name, f.Value)
case "grpc-encoding":
d.encoding = f.Value
case "grpc-status":
code, err := strconv.Atoi(f.Value)
if err != nil {
return streamErrorf(codes.Internal, "transport: malformed grpc-status: %v", err)
return status.Errorf(codes.Internal, "transport: malformed grpc-status: %v", err)
}
d.rawStatusCode = &code
case "grpc-message":
@ -254,39 +316,51 @@ func (d *decodeState) processHeaderField(f hpack.HeaderField) error {
case "grpc-status-details-bin":
v, err := decodeBinHeader(f.Value)
if err != nil {
return streamErrorf(codes.Internal, "transport: malformed grpc-status-details-bin: %v", err)
return status.Errorf(codes.Internal, "transport: malformed grpc-status-details-bin: %v", err)
}
s := &spb.Status{}
if err := proto.Unmarshal(v, s); err != nil {
return streamErrorf(codes.Internal, "transport: malformed grpc-status-details-bin: %v", err)
return status.Errorf(codes.Internal, "transport: malformed grpc-status-details-bin: %v", err)
}
d.statusGen = status.FromProto(s)
case "grpc-timeout":
d.timeoutSet = true
var err error
if d.timeout, err = decodeTimeout(f.Value); err != nil {
return streamErrorf(codes.Internal, "transport: malformed time-out: %v", err)
return status.Errorf(codes.Internal, "transport: malformed time-out: %v", err)
}
case ":path":
d.method = f.Value
case ":status":
code, err := strconv.Atoi(f.Value)
if err != nil {
return streamErrorf(codes.Internal, "transport: malformed http-status: %v", err)
return status.Errorf(codes.Internal, "transport: malformed http-status: %v", err)
}
d.httpStatus = &code
default:
if !isReservedHeader(f.Name) || isWhitelistedPseudoHeader(f.Name) {
if d.mdata == nil {
d.mdata = make(map[string][]string)
}
v, err := decodeMetadataHeader(f.Name, f.Value)
if err != nil {
errorf("Failed to decode metadata header (%q, %q): %v", f.Name, f.Value, err)
return nil
}
d.mdata[f.Name] = append(d.mdata[f.Name], v)
case "grpc-tags-bin":
v, err := decodeBinHeader(f.Value)
if err != nil {
return status.Errorf(codes.Internal, "transport: malformed grpc-tags-bin: %v", err)
}
d.statsTags = v
d.addMetadata(f.Name, string(v))
case "grpc-trace-bin":
v, err := decodeBinHeader(f.Value)
if err != nil {
return status.Errorf(codes.Internal, "transport: malformed grpc-trace-bin: %v", err)
}
d.statsTrace = v
d.addMetadata(f.Name, string(v))
default:
if isReservedHeader(f.Name) && !isWhitelistedHeader(f.Name) {
break
}
v, err := decodeMetadataHeader(f.Name, f.Value)
if err != nil {
errorf("Failed to decode metadata header (%q, %q): %v", f.Name, f.Value, err)
return nil
}
d.addMetadata(f.Name, v)
}
return nil
}
@ -375,16 +449,17 @@ func decodeTimeout(s string) (time.Duration, error) {
const (
spaceByte = ' '
tildaByte = '~'
tildeByte = '~'
percentByte = '%'
)
// encodeGrpcMessage is used to encode status code in header field
// "grpc-message".
// It checks to see if each individual byte in msg is an
// allowable byte, and then either percent encoding or passing it through.
// When percent encoding, the byte is converted into hexadecimal notation
// with a '%' prepended.
// "grpc-message". It does percent encoding and also replaces invalid utf-8
// characters with Unicode replacement character.
//
// It checks to see if each individual byte in msg is an allowable byte, and
// then either percent encoding or passing it through. When percent encoding,
// the byte is converted into hexadecimal notation with a '%' prepended.
func encodeGrpcMessage(msg string) string {
if msg == "" {
return ""
@ -392,7 +467,7 @@ func encodeGrpcMessage(msg string) string {
lenMsg := len(msg)
for i := 0; i < lenMsg; i++ {
c := msg[i]
if !(c >= spaceByte && c < tildaByte && c != percentByte) {
if !(c >= spaceByte && c <= tildeByte && c != percentByte) {
return encodeGrpcMessageUnchecked(msg)
}
}
@ -401,14 +476,26 @@ func encodeGrpcMessage(msg string) string {
func encodeGrpcMessageUnchecked(msg string) string {
var buf bytes.Buffer
lenMsg := len(msg)
for i := 0; i < lenMsg; i++ {
c := msg[i]
if c >= spaceByte && c < tildaByte && c != percentByte {
buf.WriteByte(c)
} else {
buf.WriteString(fmt.Sprintf("%%%02X", c))
for len(msg) > 0 {
r, size := utf8.DecodeRuneInString(msg)
for _, b := range []byte(string(r)) {
if size > 1 {
// If size > 1, r is not ascii. Always do percent encoding.
buf.WriteString(fmt.Sprintf("%%%02X", b))
continue
}
// The for loop is necessary even if size == 1. r could be
// utf8.RuneError.
//
// fmt.Sprintf("%%%02X", utf8.RuneError) gives "%FFFD".
if b >= spaceByte && b <= tildeByte && b != percentByte {
buf.WriteByte(b)
} else {
buf.WriteString(fmt.Sprintf("%%%02X", b))
}
}
msg = msg[size:]
}
return buf.String()
}
@ -447,151 +534,80 @@ func decodeGrpcMessageUnchecked(msg string) string {
return buf.String()
}
type framer struct {
numWriters int32
reader io.Reader
writer *bufio.Writer
fr *http2.Framer
type bufWriter struct {
buf []byte
offset int
batchSize int
conn net.Conn
err error
onFlush func()
}
func newFramer(conn net.Conn) *framer {
f := &framer{
reader: bufio.NewReaderSize(conn, http2IOBufSize),
writer: bufio.NewWriterSize(conn, http2IOBufSize),
func newBufWriter(conn net.Conn, batchSize int) *bufWriter {
return &bufWriter{
buf: make([]byte, batchSize*2),
batchSize: batchSize,
conn: conn,
}
}
func (w *bufWriter) Write(b []byte) (n int, err error) {
if w.err != nil {
return 0, w.err
}
if w.batchSize == 0 { // Buffer has been disabled.
return w.conn.Write(b)
}
for len(b) > 0 {
nn := copy(w.buf[w.offset:], b)
b = b[nn:]
w.offset += nn
n += nn
if w.offset >= w.batchSize {
err = w.Flush()
}
}
return n, err
}
func (w *bufWriter) Flush() error {
if w.err != nil {
return w.err
}
if w.offset == 0 {
return nil
}
if w.onFlush != nil {
w.onFlush()
}
_, w.err = w.conn.Write(w.buf[:w.offset])
w.offset = 0
return w.err
}
type framer struct {
writer *bufWriter
fr *http2.Framer
}
func newFramer(conn net.Conn, writeBufferSize, readBufferSize int, maxHeaderListSize uint32) *framer {
if writeBufferSize < 0 {
writeBufferSize = 0
}
var r io.Reader = conn
if readBufferSize > 0 {
r = bufio.NewReaderSize(r, readBufferSize)
}
w := newBufWriter(conn, writeBufferSize)
f := &framer{
writer: w,
fr: http2.NewFramer(w, r),
}
f.fr = http2.NewFramer(f.writer, f.reader)
// Opt-in to Frame reuse API on framer to reduce garbage.
// Frames aren't safe to read from after a subsequent call to ReadFrame.
f.fr.SetReuseFrames()
f.fr.MaxHeaderListSize = maxHeaderListSize
f.fr.ReadMetaHeaders = hpack.NewDecoder(http2InitHeaderTableSize, nil)
return f
}
func (f *framer) adjustNumWriters(i int32) int32 {
return atomic.AddInt32(&f.numWriters, i)
}
// The following writeXXX functions can only be called when the caller gets
// unblocked from writableChan channel (i.e., owns the privilege to write).
func (f *framer) writeContinuation(forceFlush bool, streamID uint32, endHeaders bool, headerBlockFragment []byte) error {
if err := f.fr.WriteContinuation(streamID, endHeaders, headerBlockFragment); err != nil {
return err
}
if forceFlush {
return f.writer.Flush()
}
return nil
}
func (f *framer) writeData(forceFlush bool, streamID uint32, endStream bool, data []byte) error {
if err := f.fr.WriteData(streamID, endStream, data); err != nil {
return err
}
if forceFlush {
return f.writer.Flush()
}
return nil
}
func (f *framer) writeGoAway(forceFlush bool, maxStreamID uint32, code http2.ErrCode, debugData []byte) error {
if err := f.fr.WriteGoAway(maxStreamID, code, debugData); err != nil {
return err
}
if forceFlush {
return f.writer.Flush()
}
return nil
}
func (f *framer) writeHeaders(forceFlush bool, p http2.HeadersFrameParam) error {
if err := f.fr.WriteHeaders(p); err != nil {
return err
}
if forceFlush {
return f.writer.Flush()
}
return nil
}
func (f *framer) writePing(forceFlush, ack bool, data [8]byte) error {
if err := f.fr.WritePing(ack, data); err != nil {
return err
}
if forceFlush {
return f.writer.Flush()
}
return nil
}
func (f *framer) writePriority(forceFlush bool, streamID uint32, p http2.PriorityParam) error {
if err := f.fr.WritePriority(streamID, p); err != nil {
return err
}
if forceFlush {
return f.writer.Flush()
}
return nil
}
func (f *framer) writePushPromise(forceFlush bool, p http2.PushPromiseParam) error {
if err := f.fr.WritePushPromise(p); err != nil {
return err
}
if forceFlush {
return f.writer.Flush()
}
return nil
}
func (f *framer) writeRSTStream(forceFlush bool, streamID uint32, code http2.ErrCode) error {
if err := f.fr.WriteRSTStream(streamID, code); err != nil {
return err
}
if forceFlush {
return f.writer.Flush()
}
return nil
}
func (f *framer) writeSettings(forceFlush bool, settings ...http2.Setting) error {
if err := f.fr.WriteSettings(settings...); err != nil {
return err
}
if forceFlush {
return f.writer.Flush()
}
return nil
}
func (f *framer) writeSettingsAck(forceFlush bool) error {
if err := f.fr.WriteSettingsAck(); err != nil {
return err
}
if forceFlush {
return f.writer.Flush()
}
return nil
}
func (f *framer) writeWindowUpdate(forceFlush bool, streamID, incr uint32) error {
if err := f.fr.WriteWindowUpdate(streamID, incr); err != nil {
return err
}
if forceFlush {
return f.writer.Flush()
}
return nil
}
func (f *framer) flushWrite() error {
return f.writer.Flush()
}
func (f *framer) readFrame() (http2.Frame, error) {
return f.fr.ReadFrame()
}
func (f *framer) errorDetail() error {
return f.fr.ErrorDetail()
}

0
vendor/google.golang.org/grpc/transport/log.go → vendor/google.golang.org/grpc/internal/transport/log.go generated vendored
View File

469
vendor/google.golang.org/grpc/transport/transport.go → vendor/google.golang.org/grpc/internal/transport/transport.go generated vendored
View File

@ -17,17 +17,19 @@
*/
// Package transport defines and implements message oriented communication
// channel to complete various transactions (e.g., an RPC).
package transport // import "google.golang.org/grpc/transport"
// channel to complete various transactions (e.g., an RPC). It is meant for
// grpc-internal usage and is not intended to be imported directly by users.
package transport
import (
"errors"
"fmt"
"io"
"net"
"sync"
"sync/atomic"
"golang.org/x/net/context"
"golang.org/x/net/http2"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/credentials"
"google.golang.org/grpc/keepalive"
@ -56,6 +58,7 @@ type recvBuffer struct {
c chan recvMsg
mu sync.Mutex
backlog []recvMsg
err error
}
func newRecvBuffer() *recvBuffer {
@ -67,20 +70,27 @@ func newRecvBuffer() *recvBuffer {
func (b *recvBuffer) put(r recvMsg) {
b.mu.Lock()
defer b.mu.Unlock()
if b.err != nil {
b.mu.Unlock()
// An error had occurred earlier, don't accept more
// data or errors.
return
}
b.err = r.err
if len(b.backlog) == 0 {
select {
case b.c <- r:
b.mu.Unlock()
return
default:
}
}
b.backlog = append(b.backlog, r)
b.mu.Unlock()
}
func (b *recvBuffer) load() {
b.mu.Lock()
defer b.mu.Unlock()
if len(b.backlog) > 0 {
select {
case b.c <- b.backlog[0]:
@ -89,6 +99,7 @@ func (b *recvBuffer) load() {
default:
}
}
b.mu.Unlock()
}
// get returns the channel that receives a recvMsg in the buffer.
@ -99,14 +110,15 @@ func (b *recvBuffer) get() <-chan recvMsg {
return b.c
}
//
// recvBufferReader implements io.Reader interface to read the data from
// recvBuffer.
type recvBufferReader struct {
ctx context.Context
goAway chan struct{}
recv *recvBuffer
last []byte // Stores the remaining data in the previous calls.
err error
ctx context.Context
ctxDone <-chan struct{} // cache of ctx.Done() (for performance).
recv *recvBuffer
last []byte // Stores the remaining data in the previous calls.
err error
}
// Read reads the next len(p) bytes from last. If last is drained, it tries to
@ -128,10 +140,8 @@ func (r *recvBufferReader) read(p []byte) (n int, err error) {
return copied, nil
}
select {
case <-r.ctx.Done():
case <-r.ctxDone:
return 0, ContextErr(r.ctx.Err())
case <-r.goAway:
return 0, ErrStreamDrain
case m := <-r.recv.get():
r.recv.load()
if m.err != nil {
@ -143,60 +153,7 @@ func (r *recvBufferReader) read(p []byte) (n int, err error) {
}
}
// All items in an out of a controlBuffer should be the same type.
type item interface {
item()
}
// controlBuffer is an unbounded channel of item.
type controlBuffer struct {
c chan item
mu sync.Mutex
backlog []item
}
func newControlBuffer() *controlBuffer {
b := &controlBuffer{
c: make(chan item, 1),
}
return b
}
func (b *controlBuffer) put(r item) {
b.mu.Lock()
defer b.mu.Unlock()
if len(b.backlog) == 0 {
select {
case b.c <- r:
return
default:
}
}
b.backlog = append(b.backlog, r)
}
func (b *controlBuffer) load() {
b.mu.Lock()
defer b.mu.Unlock()
if len(b.backlog) > 0 {
select {
case b.c <- b.backlog[0]:
b.backlog[0] = nil
b.backlog = b.backlog[1:]
default:
}
}
}
// get returns the channel that receives an item in the buffer.
//
// Upon receipt of an item, the caller should call load to send another
// item onto the channel if there is any.
func (b *controlBuffer) get() <-chan item {
return b.c
}
type streamState uint8
type streamState uint32
const (
streamActive streamState = iota
@ -207,65 +164,95 @@ const (
// Stream represents an RPC in the transport layer.
type Stream struct {
id uint32
// nil for client side Stream.
st ServerTransport
// ctx is the associated context of the stream.
ctx context.Context
// cancel is always nil for client side Stream.
cancel context.CancelFunc
// done is closed when the final status arrives.
done chan struct{}
// goAway is closed when the server sent GoAways signal before this stream was initiated.
goAway chan struct{}
// method records the associated RPC method of the stream.
method string
id uint32
st ServerTransport // nil for client side Stream
ctx context.Context // the associated context of the stream
cancel context.CancelFunc // always nil for client side Stream
done chan struct{} // closed at the end of stream to unblock writers. On the client side.
ctxDone <-chan struct{} // same as done chan but for server side. Cache of ctx.Done() (for performance)
method string // the associated RPC method of the stream
recvCompress string
sendCompress string
buf *recvBuffer
trReader io.Reader
fc *inFlow
recvQuota uint32
// TODO: Remote this unused variable.
// The accumulated inbound quota pending for window update.
updateQuota uint32
wq *writeQuota
// Callback to state application's intentions to read data. This
// is used to adjust flow control, if need be.
// is used to adjust flow control, if needed.
requestRead func(int)
sendQuotaPool *quotaPool
// Close headerChan to indicate the end of reception of header metadata.
headerChan chan struct{}
// header caches the received header metadata.
header metadata.MD
// The key-value map of trailer metadata.
trailer metadata.MD
headerChan chan struct{} // closed to indicate the end of header metadata.
headerDone uint32 // set when headerChan is closed. Used to avoid closing headerChan multiple times.
mu sync.RWMutex // guard the following
// headerOK becomes true from the first header is about to send.
headerOk bool
state streamState
// true iff headerChan is closed. Used to avoid closing headerChan
// multiple times.
headerDone bool
// the status error received from the server.
// hdrMu protects header and trailer metadata on the server-side.
hdrMu sync.Mutex
header metadata.MD // the received header metadata.
trailer metadata.MD // the key-value map of trailer metadata.
noHeaders bool // set if the client never received headers (set only after the stream is done).
// On the server-side, headerSent is atomically set to 1 when the headers are sent out.
headerSent uint32
state streamState
// On client-side it is the status error received from the server.
// On server-side it is unused.
status *status.Status
// rstStream indicates whether a RST_STREAM frame needs to be sent
// to the server to signify that this stream is closing.
rstStream bool
// rstError is the error that needs to be sent along with the RST_STREAM frame.
rstError http2.ErrCode
// bytesSent and bytesReceived indicates whether any bytes have been sent or
// received on this stream.
bytesSent bool
bytesReceived bool
bytesReceived uint32 // indicates whether any bytes have been received on this stream
unprocessed uint32 // set if the server sends a refused stream or GOAWAY including this stream
// contentSubtype is the content-subtype for requests.
// this must be lowercase or the behavior is undefined.
contentSubtype string
}
// isHeaderSent is only valid on the server-side.
func (s *Stream) isHeaderSent() bool {
return atomic.LoadUint32(&s.headerSent) == 1
}
// updateHeaderSent updates headerSent and returns true
// if it was alreay set. It is valid only on server-side.
func (s *Stream) updateHeaderSent() bool {
return atomic.SwapUint32(&s.headerSent, 1) == 1
}
func (s *Stream) swapState(st streamState) streamState {
return streamState(atomic.SwapUint32((*uint32)(&s.state), uint32(st)))
}
func (s *Stream) compareAndSwapState(oldState, newState streamState) bool {
return atomic.CompareAndSwapUint32((*uint32)(&s.state), uint32(oldState), uint32(newState))
}
func (s *Stream) getState() streamState {
return streamState(atomic.LoadUint32((*uint32)(&s.state)))
}
func (s *Stream) waitOnHeader() error {
if s.headerChan == nil {
// On the server headerChan is always nil since a stream originates
// only after having received headers.
return nil
}
select {
case <-s.ctx.Done():
return ContextErr(s.ctx.Err())
case <-s.headerChan:
return nil
}
}
// RecvCompress returns the compression algorithm applied to the inbound
// message. It is empty string if there is no compression applied.
func (s *Stream) RecvCompress() string {
if err := s.waitOnHeader(); err != nil {
return ""
}
return s.recvCompress
}
@ -274,53 +261,59 @@ func (s *Stream) SetSendCompress(str string) {
s.sendCompress = str
}
// Done returns a chanel which is closed when it receives the final status
// Done returns a channel which is closed when it receives the final status
// from the server.
func (s *Stream) Done() <-chan struct{} {
return s.done
}
// GoAway returns a channel which is closed when the server sent GoAways signal
// before this stream was initiated.
func (s *Stream) GoAway() <-chan struct{} {
return s.goAway
}
// Header acquires the key-value pairs of header metadata once it
// is available. It blocks until i) the metadata is ready or ii) there is no
// header metadata or iii) the stream is canceled/expired.
func (s *Stream) Header() (metadata.MD, error) {
var err error
select {
case <-s.ctx.Done():
err = ContextErr(s.ctx.Err())
case <-s.goAway:
err = ErrStreamDrain
case <-s.headerChan:
return s.header.Copy(), nil
}
err := s.waitOnHeader()
// Even if the stream is closed, header is returned if available.
select {
case <-s.headerChan:
if s.header == nil {
return nil, nil
}
return s.header.Copy(), nil
default:
}
return nil, err
}
// TrailersOnly blocks until a header or trailers-only frame is received and
// then returns true if the stream was trailers-only. If the stream ends
// before headers are received, returns true, nil. If a context error happens
// first, returns it as a status error. Client-side only.
func (s *Stream) TrailersOnly() (bool, error) {
err := s.waitOnHeader()
if err != nil {
return false, err
}
// if !headerDone, some other connection error occurred.
return s.noHeaders && atomic.LoadUint32(&s.headerDone) == 1, nil
}
// Trailer returns the cached trailer metedata. Note that if it is not called
// after the entire stream is done, it could return an empty MD. Client
// side only.
// It can be safely read only after stream has ended that is either read
// or write have returned io.EOF.
func (s *Stream) Trailer() metadata.MD {
s.mu.RLock()
defer s.mu.RUnlock()
return s.trailer.Copy()
c := s.trailer.Copy()
return c
}
// ServerTransport returns the underlying ServerTransport for the stream.
// The client side stream always returns nil.
func (s *Stream) ServerTransport() ServerTransport {
return s.st
// ContentSubtype returns the content-subtype for a request. For example, a
// content-subtype of "proto" will result in a content-type of
// "application/grpc+proto". This will always be lowercase. See
// https://github.com/grpc/grpc/blob/master/doc/PROTOCOL-HTTP2.md#requests for
// more details.
func (s *Stream) ContentSubtype() string {
return s.contentSubtype
}
// Context returns the context of the stream.
@ -334,34 +327,48 @@ func (s *Stream) Method() string {
}
// Status returns the status received from the server.
// Status can be read safely only after the stream has ended,
// that is, after Done() is closed.
func (s *Stream) Status() *status.Status {
return s.status
}
// SetHeader sets the header metadata. This can be called multiple times.
// Server side only.
// This should not be called in parallel to other data writes.
func (s *Stream) SetHeader(md metadata.MD) error {
s.mu.Lock()
defer s.mu.Unlock()
if s.headerOk || s.state == streamDone {
return ErrIllegalHeaderWrite
}
if md.Len() == 0 {
return nil
}
if s.isHeaderSent() || s.getState() == streamDone {
return ErrIllegalHeaderWrite
}
s.hdrMu.Lock()
s.header = metadata.Join(s.header, md)
s.hdrMu.Unlock()
return nil
}
// SendHeader sends the given header metadata. The given metadata is
// combined with any metadata set by previous calls to SetHeader and
// then written to the transport stream.
func (s *Stream) SendHeader(md metadata.MD) error {
return s.st.WriteHeader(s, md)
}
// SetTrailer sets the trailer metadata which will be sent with the RPC status
// by the server. This can be called multiple times. Server side only.
// This should not be called parallel to other data writes.
func (s *Stream) SetTrailer(md metadata.MD) error {
if md.Len() == 0 {
return nil
}
s.mu.Lock()
defer s.mu.Unlock()
if s.getState() == streamDone {
return ErrIllegalHeaderWrite
}
s.hdrMu.Lock()
s.trailer = metadata.Join(s.trailer, md)
s.hdrMu.Unlock()
return nil
}
@ -401,26 +408,15 @@ func (t *transportReader) Read(p []byte) (n int, err error) {
return
}
// finish sets the stream's state and status, and closes the done channel.
// s.mu must be held by the caller. st must always be non-nil.
func (s *Stream) finish(st *status.Status) {
s.status = st
s.state = streamDone
close(s.done)
}
// BytesSent indicates whether any bytes have been sent on this stream.
func (s *Stream) BytesSent() bool {
s.mu.Lock()
defer s.mu.Unlock()
return s.bytesSent
}
// BytesReceived indicates whether any bytes have been received on this stream.
func (s *Stream) BytesReceived() bool {
s.mu.Lock()
defer s.mu.Unlock()
return s.bytesReceived
return atomic.LoadUint32(&s.bytesReceived) == 1
}
// Unprocessed indicates whether the server did not process this stream --
// i.e. it sent a refused stream or GOAWAY including this stream ID.
func (s *Stream) Unprocessed() bool {
return atomic.LoadUint32(&s.unprocessed) == 1
}
// GoString is implemented by Stream so context.String() won't
@ -429,27 +425,11 @@ func (s *Stream) GoString() string {
return fmt.Sprintf("<stream: %p, %v>", s, s.method)
}
// The key to save transport.Stream in the context.
type streamKey struct{}
// newContextWithStream creates a new context from ctx and attaches stream
// to it.
func newContextWithStream(ctx context.Context, stream *Stream) context.Context {
return context.WithValue(ctx, streamKey{}, stream)
}
// StreamFromContext returns the stream saved in ctx.
func StreamFromContext(ctx context.Context) (s *Stream, ok bool) {
s, ok = ctx.Value(streamKey{}).(*Stream)
return
}
// state of transport
type transportState int
const (
reachable transportState = iota
unreachable
closing
draining
)
@ -464,6 +444,10 @@ type ServerConfig struct {
KeepalivePolicy keepalive.EnforcementPolicy
InitialWindowSize int32
InitialConnWindowSize int32
WriteBufferSize int
ReadBufferSize int
ChannelzParentID int64
MaxHeaderListSize *uint32
}
// NewServerTransport creates a ServerTransport with conn or non-nil error
@ -476,9 +460,6 @@ func NewServerTransport(protocol string, conn net.Conn, config *ServerConfig) (S
type ConnectOptions struct {
// UserAgent is the application user agent.
UserAgent string
// Authority is the :authority pseudo-header to use. This field has no effect if
// TransportCredentials is set.
Authority string
// Dialer specifies how to dial a network address.
Dialer func(context.Context, string) (net.Conn, error)
// FailOnNonTempDialError specifies if gRPC fails on non-temporary dial errors.
@ -491,22 +472,31 @@ type ConnectOptions struct {
KeepaliveParams keepalive.ClientParameters
// StatsHandler stores the handler for stats.
StatsHandler stats.Handler
// InitialWindowSize sets the intial window size for a stream.
// InitialWindowSize sets the initial window size for a stream.
InitialWindowSize int32
// InitialConnWindowSize sets the intial window size for a connection.
// InitialConnWindowSize sets the initial window size for a connection.
InitialConnWindowSize int32
// WriteBufferSize sets the size of write buffer which in turn determines how much data can be batched before it's written on the wire.
WriteBufferSize int
// ReadBufferSize sets the size of read buffer, which in turn determines how much data can be read at most for one read syscall.
ReadBufferSize int
// ChannelzParentID sets the addrConn id which initiate the creation of this client transport.
ChannelzParentID int64
// MaxHeaderListSize sets the max (uncompressed) size of header list that is prepared to be received.
MaxHeaderListSize *uint32
}
// TargetInfo contains the information of the target such as network address and metadata.
type TargetInfo struct {
Addr string
Metadata interface{}
Addr string
Metadata interface{}
Authority string
}
// NewClientTransport establishes the transport with the required ConnectOptions
// and returns it to the caller.
func NewClientTransport(ctx context.Context, target TargetInfo, opts ConnectOptions) (ClientTransport, error) {
return newHTTP2Client(ctx, target, opts)
func NewClientTransport(connectCtx, ctx context.Context, target TargetInfo, opts ConnectOptions, onSuccess func()) (ClientTransport, error) {
return newHTTP2Client(connectCtx, ctx, target, opts, onSuccess)
}
// Options provides additional hints and information for message
@ -515,11 +505,6 @@ type Options struct {
// Last indicates whether this write is the last piece for
// this stream.
Last bool
// Delay is a hint to the transport implementation for whether
// the data could be buffered for a batching write. The
// Transport implementation may ignore the hint.
Delay bool
}
// CallHdr carries the information of a particular RPC.
@ -530,10 +515,6 @@ type CallHdr struct {
// Method specifies the operation to perform.
Method string
// RecvCompress specifies the compression algorithm applied on
// inbound messages.
RecvCompress string
// SendCompress specifies the compression algorithm applied on
// outbound message.
SendCompress string
@ -541,13 +522,15 @@ type CallHdr struct {
// Creds specifies credentials.PerRPCCredentials for a call.
Creds credentials.PerRPCCredentials
// Flush indicates whether a new stream command should be sent
// to the peer without waiting for the first data. This is
// only a hint.
// If it's true, the transport may modify the flush decision
// for performance purposes.
// If it's false, new stream will never be flushed.
Flush bool
// ContentSubtype specifies the content-subtype for a request. For example, a
// content-subtype of "proto" will result in a content-type of
// "application/grpc+proto". The value of ContentSubtype must be all
// lowercase, otherwise the behavior is undefined. See
// https://github.com/grpc/grpc/blob/master/doc/PROTOCOL-HTTP2.md#requests
// for more details.
ContentSubtype string
PreviousAttempts int // value of grpc-previous-rpc-attempts header to set
}
// ClientTransport is the common interface for all gRPC client-side transport
@ -564,7 +547,7 @@ type ClientTransport interface {
// Write sends the data for the given stream. A nil stream indicates
// the write is to be performed on the transport as a whole.
Write(s *Stream, data []byte, opts *Options) error
Write(s *Stream, hdr []byte, data []byte, opts *Options) error
// NewStream creates a Stream for an RPC.
NewStream(ctx context.Context, callHdr *CallHdr) (*Stream, error)
@ -589,6 +572,12 @@ type ClientTransport interface {
// GetGoAwayReason returns the reason why GoAway frame was received.
GetGoAwayReason() GoAwayReason
// IncrMsgSent increments the number of message sent through this transport.
IncrMsgSent()
// IncrMsgRecv increments the number of message received through this transport.
IncrMsgRecv()
}
// ServerTransport is the common interface for all gRPC server-side transport
@ -606,7 +595,7 @@ type ServerTransport interface {
// Write sends the data for the given stream.
// Write may not be called on all streams.
Write(s *Stream, data []byte, opts *Options) error
Write(s *Stream, hdr []byte, data []byte, opts *Options) error
// WriteStatus sends the status of a stream to the client. WriteStatus is
// the final call made on a stream and always occurs.
@ -622,14 +611,12 @@ type ServerTransport interface {
// Drain notifies the client this ServerTransport stops accepting new RPCs.
Drain()
}
// streamErrorf creates an StreamError with the specified error code and description.
func streamErrorf(c codes.Code, format string, a ...interface{}) StreamError {
return StreamError{
Code: c,
Desc: fmt.Sprintf(format, a...),
}
// IncrMsgSent increments the number of message sent through this transport.
IncrMsgSent()
// IncrMsgRecv increments the number of message received through this transport.
IncrMsgRecv()
}
// connectionErrorf creates an ConnectionError with the specified error description.
@ -671,60 +658,28 @@ func (e ConnectionError) Origin() error {
var (
// ErrConnClosing indicates that the transport is closing.
ErrConnClosing = connectionErrorf(true, nil, "transport is closing")
// ErrStreamDrain indicates that the stream is rejected by the server because
// the server stops accepting new RPCs.
ErrStreamDrain = streamErrorf(codes.Unavailable, "the server stops accepting new RPCs")
// errStreamDrain indicates that the stream is rejected because the
// connection is draining. This could be caused by goaway or balancer
// removing the address.
errStreamDrain = status.Error(codes.Unavailable, "the connection is draining")
// errStreamDone is returned from write at the client side to indiacte application
// layer of an error.
errStreamDone = errors.New("the stream is done")
// StatusGoAway indicates that the server sent a GOAWAY that included this
// stream's ID in unprocessed RPCs.
statusGoAway = status.New(codes.Unavailable, "the stream is rejected because server is draining the connection")
)
// TODO: See if we can replace StreamError with status package errors.
// StreamError is an error that only affects one stream within a connection.
type StreamError struct {
Code codes.Code
Desc string
}
func (e StreamError) Error() string {
return fmt.Sprintf("stream error: code = %s desc = %q", e.Code, e.Desc)
}
// wait blocks until it can receive from ctx.Done, closing, or proceed.
// If it receives from ctx.Done, it returns 0, the StreamError for ctx.Err.
// If it receives from done, it returns 0, io.EOF if ctx is not done; otherwise
// it return the StreamError for ctx.Err.
// If it receives from goAway, it returns 0, ErrStreamDrain.
// If it receives from closing, it returns 0, ErrConnClosing.
// If it receives from proceed, it returns the received integer, nil.
func wait(ctx context.Context, done, goAway, closing <-chan struct{}, proceed <-chan int) (int, error) {
select {
case <-ctx.Done():
return 0, ContextErr(ctx.Err())
case <-done:
// User cancellation has precedence.
select {
case <-ctx.Done():
return 0, ContextErr(ctx.Err())
default:
}
return 0, io.EOF
case <-goAway:
return 0, ErrStreamDrain
case <-closing:
return 0, ErrConnClosing
case i := <-proceed:
return i, nil
}
}
// GoAwayReason contains the reason for the GoAway frame received.
type GoAwayReason uint8
const (
// Invalid indicates that no GoAway frame is received.
Invalid GoAwayReason = 0
// NoReason is the default value when GoAway frame is received.
NoReason GoAwayReason = 1
// TooManyPings indicates that a GoAway frame with ErrCodeEnhanceYourCalm
// was recieved and that the debug data said "too_many_pings".
TooManyPings GoAwayReason = 2
// GoAwayInvalid indicates that no GoAway frame is received.
GoAwayInvalid GoAwayReason = 0
// GoAwayNoReason is the default value when GoAway frame is received.
GoAwayNoReason GoAwayReason = 1
// GoAwayTooManyPings indicates that a GoAway frame with
// ErrCodeEnhanceYourCalm was received and that the debug data said
// "too_many_pings".
GoAwayTooManyPings GoAwayReason = 2
)

101
vendor/google.golang.org/grpc/metadata/metadata.go generated vendored
View File

@ -17,7 +17,8 @@
*/
// Package metadata define the structure of the metadata supported by gRPC library.
// Please refer to https://grpc.io/docs/guides/wire.html for more information about custom-metadata.
// Please refer to https://github.com/grpc/grpc/blob/master/doc/PROTOCOL-HTTP2.md
// for more information about custom-metadata.
package metadata // import "google.golang.org/grpc/metadata"
import (
@ -27,7 +28,9 @@ import (
"golang.org/x/net/context"
)
// DecodeKeyValue returns k, v, nil. It is deprecated and should not be used.
// DecodeKeyValue returns k, v, nil.
//
// Deprecated: use k and v directly instead.
func DecodeKeyValue(k, v string) (string, string, error) {
return k, v, nil
}
@ -44,6 +47,9 @@ type MD map[string][]string
// - lowercase letters: a-z
// - special characters: -_.
// Uppercase letters are automatically converted to lowercase.
//
// Keys beginning with "grpc-" are reserved for grpc-internal use only and may
// result in errors if set in metadata.
func New(m map[string]string) MD {
md := MD{}
for k, val := range m {
@ -62,6 +68,9 @@ func New(m map[string]string) MD {
// - lowercase letters: a-z
// - special characters: -_.
// Uppercase letters are automatically converted to lowercase.
//
// Keys beginning with "grpc-" are reserved for grpc-internal use only and may
// result in errors if set in metadata.
func Pairs(kv ...string) MD {
if len(kv)%2 == 1 {
panic(fmt.Sprintf("metadata: Pairs got the odd number of input pairs for metadata: %d", len(kv)))
@ -88,6 +97,30 @@ func (md MD) Copy() MD {
return Join(md)
}
// Get obtains the values for a given key.
func (md MD) Get(k string) []string {
k = strings.ToLower(k)
return md[k]
}
// Set sets the value of a given key with a slice of values.
func (md MD) Set(k string, vals ...string) {
if len(vals) == 0 {
return
}
k = strings.ToLower(k)
md[k] = vals
}
// Append adds the values to key k, not overwriting what was already stored at that key.
func (md MD) Append(k string, vals ...string) {
if len(vals) == 0 {
return
}
k = strings.ToLower(k)
md[k] = append(md[k], vals...)
}
// Join joins any number of mds into a single MD.
// The order of values for each key is determined by the order in which
// the mds containing those values are presented to Join.
@ -104,24 +137,31 @@ func Join(mds ...MD) MD {
type mdIncomingKey struct{}
type mdOutgoingKey struct{}
// NewContext is a wrapper for NewOutgoingContext(ctx, md). Deprecated.
func NewContext(ctx context.Context, md MD) context.Context {
return NewOutgoingContext(ctx, md)
}
// NewIncomingContext creates a new context with incoming md attached.
func NewIncomingContext(ctx context.Context, md MD) context.Context {
return context.WithValue(ctx, mdIncomingKey{}, md)
}
// NewOutgoingContext creates a new context with outgoing md attached.
// NewOutgoingContext creates a new context with outgoing md attached. If used
// in conjunction with AppendToOutgoingContext, NewOutgoingContext will
// overwrite any previously-appended metadata.
func NewOutgoingContext(ctx context.Context, md MD) context.Context {
return context.WithValue(ctx, mdOutgoingKey{}, md)
return context.WithValue(ctx, mdOutgoingKey{}, rawMD{md: md})
}
// FromContext is a wrapper for FromIncomingContext(ctx). Deprecated.
func FromContext(ctx context.Context) (md MD, ok bool) {
return FromIncomingContext(ctx)
// AppendToOutgoingContext returns a new context with the provided kv merged
// with any existing metadata in the context. Please refer to the
// documentation of Pairs for a description of kv.
func AppendToOutgoingContext(ctx context.Context, kv ...string) context.Context {
if len(kv)%2 == 1 {
panic(fmt.Sprintf("metadata: AppendToOutgoingContext got an odd number of input pairs for metadata: %d", len(kv)))
}
md, _ := ctx.Value(mdOutgoingKey{}).(rawMD)
added := make([][]string, len(md.added)+1)
copy(added, md.added)
added[len(added)-1] = make([]string, len(kv))
copy(added[len(added)-1], kv)
return context.WithValue(ctx, mdOutgoingKey{}, rawMD{md: md.md, added: added})
}
// FromIncomingContext returns the incoming metadata in ctx if it exists. The
@ -132,10 +172,39 @@ func FromIncomingContext(ctx context.Context) (md MD, ok bool) {
return
}
// FromOutgoingContextRaw returns the un-merged, intermediary contents
// of rawMD. Remember to perform strings.ToLower on the keys. The returned
// MD should not be modified. Writing to it may cause races. Modification
// should be made to copies of the returned MD.
//
// This is intended for gRPC-internal use ONLY.
func FromOutgoingContextRaw(ctx context.Context) (MD, [][]string, bool) {
raw, ok := ctx.Value(mdOutgoingKey{}).(rawMD)
if !ok {
return nil, nil, false
}
return raw.md, raw.added, true
}
// FromOutgoingContext returns the outgoing metadata in ctx if it exists. The
// returned MD should not be modified. Writing to it may cause races.
// Modification should be made to the copies of the returned MD.
func FromOutgoingContext(ctx context.Context) (md MD, ok bool) {
md, ok = ctx.Value(mdOutgoingKey{}).(MD)
return
// Modification should be made to copies of the returned MD.
func FromOutgoingContext(ctx context.Context) (MD, bool) {
raw, ok := ctx.Value(mdOutgoingKey{}).(rawMD)
if !ok {
return nil, false
}
mds := make([]MD, 0, len(raw.added)+1)
mds = append(mds, raw.md)
for _, vv := range raw.added {
mds = append(mds, Pairs(vv...))
}
return Join(mds...), ok
}
type rawMD struct {
md MD
added [][]string
}

50
vendor/google.golang.org/grpc/naming/dns_resolver.go generated vendored
View File

@ -141,8 +141,8 @@ type dnsWatcher struct {
r *dnsResolver
host string
port string
// The latest resolved address list
curAddrs []*Update
// The latest resolved address set
curAddrs map[string]*Update
ctx context.Context
cancel context.CancelFunc
t *time.Timer
@ -153,10 +153,10 @@ type ipWatcher struct {
updateChan chan *Update
}
// Next returns the adrress resolution Update for the target. For IP address,
// the resolution is itself, thus polling name server is unncessary. Therefore,
// Next returns the address resolution Update for the target. For IP address,
// the resolution is itself, thus polling name server is unnecessary. Therefore,
// Next() will return an Update the first time it is called, and will be blocked
// for all following calls as no Update exisits until watcher is closed.
// for all following calls as no Update exists until watcher is closed.
func (i *ipWatcher) Next() ([]*Update, error) {
u, ok := <-i.updateChan
if !ok {
@ -192,28 +192,24 @@ type AddrMetadataGRPCLB struct {
// compileUpdate compares the old resolved addresses and newly resolved addresses,
// and generates an update list
func (w *dnsWatcher) compileUpdate(newAddrs []*Update) []*Update {
update := make(map[Update]bool)
for _, u := range newAddrs {
update[*u] = true
}
for _, u := range w.curAddrs {
if _, ok := update[*u]; ok {
delete(update, *u)
continue
func (w *dnsWatcher) compileUpdate(newAddrs map[string]*Update) []*Update {
var res []*Update
for a, u := range w.curAddrs {
if _, ok := newAddrs[a]; !ok {
u.Op = Delete
res = append(res, u)
}
update[Update{Addr: u.Addr, Op: Delete, Metadata: u.Metadata}] = true
}
res := make([]*Update, 0, len(update))
for k := range update {
tmp := k
res = append(res, &tmp)
for a, u := range newAddrs {
if _, ok := w.curAddrs[a]; !ok {
res = append(res, u)
}
}
return res
}
func (w *dnsWatcher) lookupSRV() []*Update {
var newAddrs []*Update
func (w *dnsWatcher) lookupSRV() map[string]*Update {
newAddrs := make(map[string]*Update)
_, srvs, err := lookupSRV(w.ctx, "grpclb", "tcp", w.host)
if err != nil {
grpclog.Infof("grpc: failed dns SRV record lookup due to %v.\n", err)
@ -231,15 +227,16 @@ func (w *dnsWatcher) lookupSRV() []*Update {
grpclog.Errorf("grpc: failed IP parsing due to %v.\n", err)
continue
}
newAddrs = append(newAddrs, &Update{Addr: a + ":" + strconv.Itoa(int(s.Port)),
Metadata: AddrMetadataGRPCLB{AddrType: GRPCLB, ServerName: s.Target}})
addr := a + ":" + strconv.Itoa(int(s.Port))
newAddrs[addr] = &Update{Addr: addr,
Metadata: AddrMetadataGRPCLB{AddrType: GRPCLB, ServerName: s.Target}}
}
}
return newAddrs
}
func (w *dnsWatcher) lookupHost() []*Update {
var newAddrs []*Update
func (w *dnsWatcher) lookupHost() map[string]*Update {
newAddrs := make(map[string]*Update)
addrs, err := lookupHost(w.ctx, w.host)
if err != nil {
grpclog.Warningf("grpc: failed dns A record lookup due to %v.\n", err)
@ -251,7 +248,8 @@ func (w *dnsWatcher) lookupHost() []*Update {
grpclog.Errorf("grpc: failed IP parsing due to %v.\n", err)
continue
}
newAddrs = append(newAddrs, &Update{Addr: a + ":" + w.port})
addr := a + ":" + w.port
newAddrs[addr] = &Update{Addr: addr}
}
return newAddrs
}

2
vendor/google.golang.org/grpc/naming/go17.go generated vendored
View File

@ -1,4 +1,4 @@
// +build go1.6, !go1.8
// +build go1.6,!go1.8
/*
*

12
vendor/google.golang.org/grpc/naming/naming.go generated vendored
View File

@ -18,20 +18,26 @@
// Package naming defines the naming API and related data structures for gRPC.
// The interface is EXPERIMENTAL and may be suject to change.
//
// Deprecated: please use package resolver.
package naming
// Operation defines the corresponding operations for a name resolution change.
//
// Deprecated: please use package resolver.
type Operation uint8
const (
// Add indicates a new address is added.
Add Operation = iota
// Delete indicates an exisiting address is deleted.
// Delete indicates an existing address is deleted.
Delete
)
// Update defines a name resolution update. Notice that it is not valid having both
// empty string Addr and nil Metadata in an Update.
//
// Deprecated: please use package resolver.
type Update struct {
// Op indicates the operation of the update.
Op Operation
@ -43,12 +49,16 @@ type Update struct {
}
// Resolver creates a Watcher for a target to track its resolution changes.
//
// Deprecated: please use package resolver.
type Resolver interface {
// Resolve creates a Watcher for target.
Resolve(target string) (Watcher, error)
}
// Watcher watches for the updates on the specified target.
//
// Deprecated: please use package resolver.
type Watcher interface {
// Next blocks until an update or error happens. It may return one or more
// updates. The first call should get the full set of the results. It should

180
vendor/google.golang.org/grpc/picker_wrapper.go generated vendored Normal file
View File

@ -0,0 +1,180 @@
/*
*
* Copyright 2017 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package grpc
import (
"io"
"sync"
"golang.org/x/net/context"
"google.golang.org/grpc/balancer"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/grpclog"
"google.golang.org/grpc/internal/channelz"
"google.golang.org/grpc/internal/transport"
"google.golang.org/grpc/status"
)
// pickerWrapper is a wrapper of balancer.Picker. It blocks on certain pick
// actions and unblock when there's a picker update.
type pickerWrapper struct {
mu sync.Mutex
done bool
blockingCh chan struct{}
picker balancer.Picker
// The latest connection happened.
connErrMu sync.Mutex
connErr error
}
func newPickerWrapper() *pickerWrapper {
bp := &pickerWrapper{blockingCh: make(chan struct{})}
return bp
}
func (bp *pickerWrapper) updateConnectionError(err error) {
bp.connErrMu.Lock()
bp.connErr = err
bp.connErrMu.Unlock()
}
func (bp *pickerWrapper) connectionError() error {
bp.connErrMu.Lock()
err := bp.connErr
bp.connErrMu.Unlock()
return err
}
// updatePicker is called by UpdateBalancerState. It unblocks all blocked pick.
func (bp *pickerWrapper) updatePicker(p balancer.Picker) {
bp.mu.Lock()
if bp.done {
bp.mu.Unlock()
return
}
bp.picker = p
// bp.blockingCh should never be nil.
close(bp.blockingCh)
bp.blockingCh = make(chan struct{})
bp.mu.Unlock()
}
func doneChannelzWrapper(acw *acBalancerWrapper, done func(balancer.DoneInfo)) func(balancer.DoneInfo) {
acw.mu.Lock()
ac := acw.ac
acw.mu.Unlock()
ac.incrCallsStarted()
return func(b balancer.DoneInfo) {
if b.Err != nil && b.Err != io.EOF {
ac.incrCallsFailed()
} else {
ac.incrCallsSucceeded()
}
if done != nil {
done(b)
}
}
}
// pick returns the transport that will be used for the RPC.
// It may block in the following cases:
// - there's no picker
// - the current picker returns ErrNoSubConnAvailable
// - the current picker returns other errors and failfast is false.
// - the subConn returned by the current picker is not READY
// When one of these situations happens, pick blocks until the picker gets updated.
func (bp *pickerWrapper) pick(ctx context.Context, failfast bool, opts balancer.PickOptions) (transport.ClientTransport, func(balancer.DoneInfo), error) {
var (
p balancer.Picker
ch chan struct{}
)
for {
bp.mu.Lock()
if bp.done {
bp.mu.Unlock()
return nil, nil, ErrClientConnClosing
}
if bp.picker == nil {
ch = bp.blockingCh
}
if ch == bp.blockingCh {
// This could happen when either:
// - bp.picker is nil (the previous if condition), or
// - has called pick on the current picker.
bp.mu.Unlock()
select {
case <-ctx.Done():
return nil, nil, ctx.Err()
case <-ch:
}
continue
}
ch = bp.blockingCh
p = bp.picker
bp.mu.Unlock()
subConn, done, err := p.Pick(ctx, opts)
if err != nil {
switch err {
case balancer.ErrNoSubConnAvailable:
continue
case balancer.ErrTransientFailure:
if !failfast {
continue
}
return nil, nil, status.Errorf(codes.Unavailable, "%v, latest connection error: %v", err, bp.connectionError())
default:
// err is some other error.
return nil, nil, toRPCErr(err)
}
}
acw, ok := subConn.(*acBalancerWrapper)
if !ok {
grpclog.Infof("subconn returned from pick is not *acBalancerWrapper")
continue
}
if t, ok := acw.getAddrConn().getReadyTransport(); ok {
if channelz.IsOn() {
return t, doneChannelzWrapper(acw, done), nil
}
return t, done, nil
}
grpclog.Infof("blockingPicker: the picked transport is not ready, loop back to repick")
// If ok == false, ac.state is not READY.
// A valid picker always returns READY subConn. This means the state of ac
// just changed, and picker will be updated shortly.
// continue back to the beginning of the for loop to repick.
}
}
func (bp *pickerWrapper) close() {
bp.mu.Lock()
defer bp.mu.Unlock()
if bp.done {
return
}
bp.done = true
close(bp.blockingCh)
}

108
vendor/google.golang.org/grpc/pickfirst.go generated vendored Normal file
View File

@ -0,0 +1,108 @@
/*
*
* Copyright 2017 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package grpc
import (
"golang.org/x/net/context"
"google.golang.org/grpc/balancer"
"google.golang.org/grpc/connectivity"
"google.golang.org/grpc/grpclog"
"google.golang.org/grpc/resolver"
)
// PickFirstBalancerName is the name of the pick_first balancer.
const PickFirstBalancerName = "pick_first"
func newPickfirstBuilder() balancer.Builder {
return &pickfirstBuilder{}
}
type pickfirstBuilder struct{}
func (*pickfirstBuilder) Build(cc balancer.ClientConn, opt balancer.BuildOptions) balancer.Balancer {
return &pickfirstBalancer{cc: cc}
}
func (*pickfirstBuilder) Name() string {
return PickFirstBalancerName
}
type pickfirstBalancer struct {
cc balancer.ClientConn
sc balancer.SubConn
}
func (b *pickfirstBalancer) HandleResolvedAddrs(addrs []resolver.Address, err error) {
if err != nil {
grpclog.Infof("pickfirstBalancer: HandleResolvedAddrs called with error %v", err)
return
}
if b.sc == nil {
b.sc, err = b.cc.NewSubConn(addrs, balancer.NewSubConnOptions{})
if err != nil {
grpclog.Errorf("pickfirstBalancer: failed to NewSubConn: %v", err)
return
}
b.cc.UpdateBalancerState(connectivity.Idle, &picker{sc: b.sc})
b.sc.Connect()
} else {
b.sc.UpdateAddresses(addrs)
b.sc.Connect()
}
}
func (b *pickfirstBalancer) HandleSubConnStateChange(sc balancer.SubConn, s connectivity.State) {
grpclog.Infof("pickfirstBalancer: HandleSubConnStateChange: %p, %v", sc, s)
if b.sc != sc {
grpclog.Infof("pickfirstBalancer: ignored state change because sc is not recognized")
return
}
if s == connectivity.Shutdown {
b.sc = nil
return
}
switch s {
case connectivity.Ready, connectivity.Idle:
b.cc.UpdateBalancerState(s, &picker{sc: sc})
case connectivity.Connecting:
b.cc.UpdateBalancerState(s, &picker{err: balancer.ErrNoSubConnAvailable})
case connectivity.TransientFailure:
b.cc.UpdateBalancerState(s, &picker{err: balancer.ErrTransientFailure})
}
}
func (b *pickfirstBalancer) Close() {
}
type picker struct {
err error
sc balancer.SubConn
}
func (p *picker) Pick(ctx context.Context, opts balancer.PickOptions) (balancer.SubConn, func(balancer.DoneInfo), error) {
if p.err != nil {
return nil, nil, p.err
}
return p.sc, nil, nil
}
func init() {
balancer.Register(newPickfirstBuilder())
}

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/*
*
* Copyright 2017 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
// Package dns implements a dns resolver to be installed as the default resolver
// in grpc.
package dns
import (
"encoding/json"
"errors"
"fmt"
"net"
"os"
"strconv"
"strings"
"sync"
"time"
"golang.org/x/net/context"
"google.golang.org/grpc/grpclog"
"google.golang.org/grpc/internal/backoff"
"google.golang.org/grpc/internal/grpcrand"
"google.golang.org/grpc/resolver"
)
func init() {
resolver.Register(NewBuilder())
}
const (
defaultPort = "443"
defaultFreq = time.Minute * 30
golang = "GO"
// In DNS, service config is encoded in a TXT record via the mechanism
// described in RFC-1464 using the attribute name grpc_config.
txtAttribute = "grpc_config="
)
var (
errMissingAddr = errors.New("dns resolver: missing address")
// Addresses ending with a colon that is supposed to be the separator
// between host and port is not allowed. E.g. "::" is a valid address as
// it is an IPv6 address (host only) and "[::]:" is invalid as it ends with
// a colon as the host and port separator
errEndsWithColon = errors.New("dns resolver: missing port after port-separator colon")
)
// NewBuilder creates a dnsBuilder which is used to factory DNS resolvers.
func NewBuilder() resolver.Builder {
return &dnsBuilder{minFreq: defaultFreq}
}
type dnsBuilder struct {
// minimum frequency of polling the DNS server.
minFreq time.Duration
}
// Build creates and starts a DNS resolver that watches the name resolution of the target.
func (b *dnsBuilder) Build(target resolver.Target, cc resolver.ClientConn, opts resolver.BuildOption) (resolver.Resolver, error) {
if target.Authority != "" {
return nil, fmt.Errorf("Default DNS resolver does not support custom DNS server")
}
host, port, err := parseTarget(target.Endpoint)
if err != nil {
return nil, err
}
// IP address.
if net.ParseIP(host) != nil {
host, _ = formatIP(host)
addr := []resolver.Address{{Addr: host + ":" + port}}
i := &ipResolver{
cc: cc,
ip: addr,
rn: make(chan struct{}, 1),
q: make(chan struct{}),
}
cc.NewAddress(addr)
go i.watcher()
return i, nil
}
// DNS address (non-IP).
ctx, cancel := context.WithCancel(context.Background())
d := &dnsResolver{
freq: b.minFreq,
backoff: backoff.Exponential{MaxDelay: b.minFreq},
host: host,
port: port,
ctx: ctx,
cancel: cancel,
cc: cc,
t: time.NewTimer(0),
rn: make(chan struct{}, 1),
disableServiceConfig: opts.DisableServiceConfig,
}
d.wg.Add(1)
go d.watcher()
return d, nil
}
// Scheme returns the naming scheme of this resolver builder, which is "dns".
func (b *dnsBuilder) Scheme() string {
return "dns"
}
// ipResolver watches for the name resolution update for an IP address.
type ipResolver struct {
cc resolver.ClientConn
ip []resolver.Address
// rn channel is used by ResolveNow() to force an immediate resolution of the target.
rn chan struct{}
q chan struct{}
}
// ResolveNow resend the address it stores, no resolution is needed.
func (i *ipResolver) ResolveNow(opt resolver.ResolveNowOption) {
select {
case i.rn <- struct{}{}:
default:
}
}
// Close closes the ipResolver.
func (i *ipResolver) Close() {
close(i.q)
}
func (i *ipResolver) watcher() {
for {
select {
case <-i.rn:
i.cc.NewAddress(i.ip)
case <-i.q:
return
}
}
}
// dnsResolver watches for the name resolution update for a non-IP target.
type dnsResolver struct {
freq time.Duration
backoff backoff.Exponential
retryCount int
host string
port string
ctx context.Context
cancel context.CancelFunc
cc resolver.ClientConn
// rn channel is used by ResolveNow() to force an immediate resolution of the target.
rn chan struct{}
t *time.Timer
// wg is used to enforce Close() to return after the watcher() goroutine has finished.
// Otherwise, data race will be possible. [Race Example] in dns_resolver_test we
// replace the real lookup functions with mocked ones to facilitate testing.
// If Close() doesn't wait for watcher() goroutine finishes, race detector sometimes
// will warns lookup (READ the lookup function pointers) inside watcher() goroutine
// has data race with replaceNetFunc (WRITE the lookup function pointers).
wg sync.WaitGroup
disableServiceConfig bool
}
// ResolveNow invoke an immediate resolution of the target that this dnsResolver watches.
func (d *dnsResolver) ResolveNow(opt resolver.ResolveNowOption) {
select {
case d.rn <- struct{}{}:
default:
}
}
// Close closes the dnsResolver.
func (d *dnsResolver) Close() {
d.cancel()
d.wg.Wait()
d.t.Stop()
}
func (d *dnsResolver) watcher() {
defer d.wg.Done()
for {
select {
case <-d.ctx.Done():
return
case <-d.t.C:
case <-d.rn:
}
result, sc := d.lookup()
// Next lookup should happen within an interval defined by d.freq. It may be
// more often due to exponential retry on empty address list.
if len(result) == 0 {
d.retryCount++
d.t.Reset(d.backoff.Backoff(d.retryCount))
} else {
d.retryCount = 0
d.t.Reset(d.freq)
}
d.cc.NewServiceConfig(sc)
d.cc.NewAddress(result)
}
}
func (d *dnsResolver) lookupSRV() []resolver.Address {
var newAddrs []resolver.Address
_, srvs, err := lookupSRV(d.ctx, "grpclb", "tcp", d.host)
if err != nil {
grpclog.Infof("grpc: failed dns SRV record lookup due to %v.\n", err)
return nil
}
for _, s := range srvs {
lbAddrs, err := lookupHost(d.ctx, s.Target)
if err != nil {
grpclog.Infof("grpc: failed load balancer address dns lookup due to %v.\n", err)
continue
}
for _, a := range lbAddrs {
a, ok := formatIP(a)
if !ok {
grpclog.Errorf("grpc: failed IP parsing due to %v.\n", err)
continue
}
addr := a + ":" + strconv.Itoa(int(s.Port))
newAddrs = append(newAddrs, resolver.Address{Addr: addr, Type: resolver.GRPCLB, ServerName: s.Target})
}
}
return newAddrs
}
func (d *dnsResolver) lookupTXT() string {
ss, err := lookupTXT(d.ctx, d.host)
if err != nil {
grpclog.Infof("grpc: failed dns TXT record lookup due to %v.\n", err)
return ""
}
var res string
for _, s := range ss {
res += s
}
// TXT record must have "grpc_config=" attribute in order to be used as service config.
if !strings.HasPrefix(res, txtAttribute) {
grpclog.Warningf("grpc: TXT record %v missing %v attribute", res, txtAttribute)
return ""
}
return strings.TrimPrefix(res, txtAttribute)
}
func (d *dnsResolver) lookupHost() []resolver.Address {
var newAddrs []resolver.Address
addrs, err := lookupHost(d.ctx, d.host)
if err != nil {
grpclog.Warningf("grpc: failed dns A record lookup due to %v.\n", err)
return nil
}
for _, a := range addrs {
a, ok := formatIP(a)
if !ok {
grpclog.Errorf("grpc: failed IP parsing due to %v.\n", err)
continue
}
addr := a + ":" + d.port
newAddrs = append(newAddrs, resolver.Address{Addr: addr})
}
return newAddrs
}
func (d *dnsResolver) lookup() ([]resolver.Address, string) {
newAddrs := d.lookupSRV()
// Support fallback to non-balancer address.
newAddrs = append(newAddrs, d.lookupHost()...)
if d.disableServiceConfig {
return newAddrs, ""
}
sc := d.lookupTXT()
return newAddrs, canaryingSC(sc)
}
// formatIP returns ok = false if addr is not a valid textual representation of an IP address.
// If addr is an IPv4 address, return the addr and ok = true.
// If addr is an IPv6 address, return the addr enclosed in square brackets and ok = true.
func formatIP(addr string) (addrIP string, ok bool) {
ip := net.ParseIP(addr)
if ip == nil {
return "", false
}
if ip.To4() != nil {
return addr, true
}
return "[" + addr + "]", true
}
// parseTarget takes the user input target string, returns formatted host and port info.
// If target doesn't specify a port, set the port to be the defaultPort.
// If target is in IPv6 format and host-name is enclosed in sqarue brackets, brackets
// are strippd when setting the host.
// examples:
// target: "www.google.com" returns host: "www.google.com", port: "443"
// target: "ipv4-host:80" returns host: "ipv4-host", port: "80"
// target: "[ipv6-host]" returns host: "ipv6-host", port: "443"
// target: ":80" returns host: "localhost", port: "80"
func parseTarget(target string) (host, port string, err error) {
if target == "" {
return "", "", errMissingAddr
}
if ip := net.ParseIP(target); ip != nil {
// target is an IPv4 or IPv6(without brackets) address
return target, defaultPort, nil
}
if host, port, err = net.SplitHostPort(target); err == nil {
if port == "" {
// If the port field is empty (target ends with colon), e.g. "[::1]:", this is an error.
return "", "", errEndsWithColon
}
// target has port, i.e ipv4-host:port, [ipv6-host]:port, host-name:port
if host == "" {
// Keep consistent with net.Dial(): If the host is empty, as in ":80", the local system is assumed.
host = "localhost"
}
return host, port, nil
}
if host, port, err = net.SplitHostPort(target + ":" + defaultPort); err == nil {
// target doesn't have port
return host, port, nil
}
return "", "", fmt.Errorf("invalid target address %v, error info: %v", target, err)
}
type rawChoice struct {
ClientLanguage *[]string `json:"clientLanguage,omitempty"`
Percentage *int `json:"percentage,omitempty"`
ClientHostName *[]string `json:"clientHostName,omitempty"`
ServiceConfig *json.RawMessage `json:"serviceConfig,omitempty"`
}
func containsString(a *[]string, b string) bool {
if a == nil {
return true
}
for _, c := range *a {
if c == b {
return true
}
}
return false
}
func chosenByPercentage(a *int) bool {
if a == nil {
return true
}
return grpcrand.Intn(100)+1 <= *a
}
func canaryingSC(js string) string {
if js == "" {
return ""
}
var rcs []rawChoice
err := json.Unmarshal([]byte(js), &rcs)
if err != nil {
grpclog.Warningf("grpc: failed to parse service config json string due to %v.\n", err)
return ""
}
cliHostname, err := os.Hostname()
if err != nil {
grpclog.Warningf("grpc: failed to get client hostname due to %v.\n", err)
return ""
}
var sc string
for _, c := range rcs {
if !containsString(c.ClientLanguage, golang) ||
!chosenByPercentage(c.Percentage) ||
!containsString(c.ClientHostName, cliHostname) ||
c.ServiceConfig == nil {
continue
}
sc = string(*c.ServiceConfig)
break
}
return sc
}

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// +build go1.6, !go1.8
/*
*
* Copyright 2017 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package dns
import (
"net"
"golang.org/x/net/context"
)
var (
lookupHost = func(ctx context.Context, host string) ([]string, error) { return net.LookupHost(host) }
lookupSRV = func(ctx context.Context, service, proto, name string) (string, []*net.SRV, error) {
return net.LookupSRV(service, proto, name)
}
lookupTXT = func(ctx context.Context, name string) ([]string, error) { return net.LookupTXT(name) }
)

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// +build go1.8
/*
*
* Copyright 2017 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package dns
import "net"
var (
lookupHost = net.DefaultResolver.LookupHost
lookupSRV = net.DefaultResolver.LookupSRV
lookupTXT = net.DefaultResolver.LookupTXT
)

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/*
*
* Copyright 2017 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
// Package passthrough implements a pass-through resolver. It sends the target
// name without scheme back to gRPC as resolved address.
package passthrough
import "google.golang.org/grpc/resolver"
const scheme = "passthrough"
type passthroughBuilder struct{}
func (*passthroughBuilder) Build(target resolver.Target, cc resolver.ClientConn, opts resolver.BuildOption) (resolver.Resolver, error) {
r := &passthroughResolver{
target: target,
cc: cc,
}
r.start()
return r, nil
}
func (*passthroughBuilder) Scheme() string {
return scheme
}
type passthroughResolver struct {
target resolver.Target
cc resolver.ClientConn
}
func (r *passthroughResolver) start() {
r.cc.NewAddress([]resolver.Address{{Addr: r.target.Endpoint}})
}
func (*passthroughResolver) ResolveNow(o resolver.ResolveNowOption) {}
func (*passthroughResolver) Close() {}
func init() {
resolver.Register(&passthroughBuilder{})
}

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/*
*
* Copyright 2017 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
// Package resolver defines APIs for name resolution in gRPC.
// All APIs in this package are experimental.
package resolver
var (
// m is a map from scheme to resolver builder.
m = make(map[string]Builder)
// defaultScheme is the default scheme to use.
defaultScheme = "passthrough"
)
// TODO(bar) install dns resolver in init(){}.
// Register registers the resolver builder to the resolver map. b.Scheme will be
// used as the scheme registered with this builder.
//
// NOTE: this function must only be called during initialization time (i.e. in
// an init() function), and is not thread-safe. If multiple Resolvers are
// registered with the same name, the one registered last will take effect.
func Register(b Builder) {
m[b.Scheme()] = b
}
// Get returns the resolver builder registered with the given scheme.
//
// If no builder is register with the scheme, nil will be returned.
func Get(scheme string) Builder {
if b, ok := m[scheme]; ok {
return b
}
return nil
}
// SetDefaultScheme sets the default scheme that will be used. The default
// default scheme is "passthrough".
//
// NOTE: this function must only be called during initialization time (i.e. in
// an init() function), and is not thread-safe. The scheme set last overrides
// previously set values.
func SetDefaultScheme(scheme string) {
defaultScheme = scheme
}
// GetDefaultScheme gets the default scheme that will be used.
func GetDefaultScheme() string {
return defaultScheme
}
// AddressType indicates the address type returned by name resolution.
type AddressType uint8
const (
// Backend indicates the address is for a backend server.
Backend AddressType = iota
// GRPCLB indicates the address is for a grpclb load balancer.
GRPCLB
)
// Address represents a server the client connects to.
// This is the EXPERIMENTAL API and may be changed or extended in the future.
type Address struct {
// Addr is the server address on which a connection will be established.
Addr string
// Type is the type of this address.
Type AddressType
// ServerName is the name of this address.
//
// e.g. if Type is GRPCLB, ServerName should be the name of the remote load
// balancer, not the name of the backend.
ServerName string
// Metadata is the information associated with Addr, which may be used
// to make load balancing decision.
Metadata interface{}
}
// BuildOption includes additional information for the builder to create
// the resolver.
type BuildOption struct {
// DisableServiceConfig indicates whether resolver should fetch service config data.
DisableServiceConfig bool
}
// ClientConn contains the callbacks for resolver to notify any updates
// to the gRPC ClientConn.
//
// This interface is to be implemented by gRPC. Users should not need a
// brand new implementation of this interface. For the situations like
// testing, the new implementation should embed this interface. This allows
// gRPC to add new methods to this interface.
type ClientConn interface {
// NewAddress is called by resolver to notify ClientConn a new list
// of resolved addresses.
// The address list should be the complete list of resolved addresses.
NewAddress(addresses []Address)
// NewServiceConfig is called by resolver to notify ClientConn a new
// service config. The service config should be provided as a json string.
NewServiceConfig(serviceConfig string)
}
// Target represents a target for gRPC, as specified in:
// https://github.com/grpc/grpc/blob/master/doc/naming.md.
type Target struct {
Scheme string
Authority string
Endpoint string
}
// Builder creates a resolver that will be used to watch name resolution updates.
type Builder interface {
// Build creates a new resolver for the given target.
//
// gRPC dial calls Build synchronously, and fails if the returned error is
// not nil.
Build(target Target, cc ClientConn, opts BuildOption) (Resolver, error)
// Scheme returns the scheme supported by this resolver.
// Scheme is defined at https://github.com/grpc/grpc/blob/master/doc/naming.md.
Scheme() string
}
// ResolveNowOption includes additional information for ResolveNow.
type ResolveNowOption struct{}
// Resolver watches for the updates on the specified target.
// Updates include address updates and service config updates.
type Resolver interface {
// ResolveNow will be called by gRPC to try to resolve the target name
// again. It's just a hint, resolver can ignore this if it's not necessary.
//
// It could be called multiple times concurrently.
ResolveNow(ResolveNowOption)
// Close closes the resolver.
Close()
}
// UnregisterForTesting removes the resolver builder with the given scheme from the
// resolver map.
// This function is for testing only.
func UnregisterForTesting(scheme string) {
delete(m, scheme)
}

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/*
*
* Copyright 2017 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package grpc
import (
"fmt"
"strings"
"google.golang.org/grpc/grpclog"
"google.golang.org/grpc/resolver"
)
// ccResolverWrapper is a wrapper on top of cc for resolvers.
// It implements resolver.ClientConnection interface.
type ccResolverWrapper struct {
cc *ClientConn
resolver resolver.Resolver
addrCh chan []resolver.Address
scCh chan string
done chan struct{}
}
// split2 returns the values from strings.SplitN(s, sep, 2).
// If sep is not found, it returns ("", s, false) instead.
func split2(s, sep string) (string, string, bool) {
spl := strings.SplitN(s, sep, 2)
if len(spl) < 2 {
return "", "", false
}
return spl[0], spl[1], true
}
// parseTarget splits target into a struct containing scheme, authority and
// endpoint.
//
// If target is not a valid scheme://authority/endpoint, it returns {Endpoint:
// target}.
func parseTarget(target string) (ret resolver.Target) {
var ok bool
ret.Scheme, ret.Endpoint, ok = split2(target, "://")
if !ok {
return resolver.Target{Endpoint: target}
}
ret.Authority, ret.Endpoint, ok = split2(ret.Endpoint, "/")
if !ok {
return resolver.Target{Endpoint: target}
}
return ret
}
// newCCResolverWrapper parses cc.target for scheme and gets the resolver
// builder for this scheme and builds the resolver. The monitoring goroutine
// for it is not started yet and can be created by calling start().
//
// If withResolverBuilder dial option is set, the specified resolver will be
// used instead.
func newCCResolverWrapper(cc *ClientConn) (*ccResolverWrapper, error) {
rb := cc.dopts.resolverBuilder
if rb == nil {
return nil, fmt.Errorf("could not get resolver for scheme: %q", cc.parsedTarget.Scheme)
}
ccr := &ccResolverWrapper{
cc: cc,
addrCh: make(chan []resolver.Address, 1),
scCh: make(chan string, 1),
done: make(chan struct{}),
}
var err error
ccr.resolver, err = rb.Build(cc.parsedTarget, ccr, resolver.BuildOption{DisableServiceConfig: cc.dopts.disableServiceConfig})
if err != nil {
return nil, err
}
return ccr, nil
}
func (ccr *ccResolverWrapper) start() {
go ccr.watcher()
}
// watcher processes address updates and service config updates sequentially.
// Otherwise, we need to resolve possible races between address and service
// config (e.g. they specify different balancer types).
func (ccr *ccResolverWrapper) watcher() {
for {
select {
case <-ccr.done:
return
default:
}
select {
case addrs := <-ccr.addrCh:
select {
case <-ccr.done:
return
default:
}
grpclog.Infof("ccResolverWrapper: sending new addresses to cc: %v", addrs)
ccr.cc.handleResolvedAddrs(addrs, nil)
case sc := <-ccr.scCh:
select {
case <-ccr.done:
return
default:
}
grpclog.Infof("ccResolverWrapper: got new service config: %v", sc)
ccr.cc.handleServiceConfig(sc)
case <-ccr.done:
return
}
}
}
func (ccr *ccResolverWrapper) resolveNow(o resolver.ResolveNowOption) {
ccr.resolver.ResolveNow(o)
}
func (ccr *ccResolverWrapper) close() {
ccr.resolver.Close()
close(ccr.done)
}
// NewAddress is called by the resolver implemenetion to send addresses to gRPC.
func (ccr *ccResolverWrapper) NewAddress(addrs []resolver.Address) {
select {
case <-ccr.addrCh:
default:
}
ccr.addrCh <- addrs
}
// NewServiceConfig is called by the resolver implemenetion to send service
// configs to gRPC.
func (ccr *ccResolverWrapper) NewServiceConfig(sc string) {
select {
case <-ccr.scCh:
default:
}
ccr.scCh <- sc
}

653
vendor/google.golang.org/grpc/rpc_util.go generated vendored
View File

@ -22,23 +22,30 @@ import (
"bytes"
"compress/gzip"
"encoding/binary"
"fmt"
"io"
"io/ioutil"
"math"
"net/url"
"strings"
"sync"
"time"
"golang.org/x/net/context"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/credentials"
"google.golang.org/grpc/encoding"
"google.golang.org/grpc/encoding/proto"
"google.golang.org/grpc/internal/transport"
"google.golang.org/grpc/metadata"
"google.golang.org/grpc/peer"
"google.golang.org/grpc/stats"
"google.golang.org/grpc/status"
"google.golang.org/grpc/transport"
)
// Compressor defines the interface gRPC uses to compress a message.
//
// Deprecated: use package encoding.
type Compressor interface {
// Do compresses p into w.
Do(w io.Writer, p []byte) error
@ -51,18 +58,39 @@ type gzipCompressor struct {
}
// NewGZIPCompressor creates a Compressor based on GZIP.
//
// Deprecated: use package encoding/gzip.
func NewGZIPCompressor() Compressor {
c, _ := NewGZIPCompressorWithLevel(gzip.DefaultCompression)
return c
}
// NewGZIPCompressorWithLevel is like NewGZIPCompressor but specifies the gzip compression level instead
// of assuming DefaultCompression.
//
// The error returned will be nil if the level is valid.
//
// Deprecated: use package encoding/gzip.
func NewGZIPCompressorWithLevel(level int) (Compressor, error) {
if level < gzip.DefaultCompression || level > gzip.BestCompression {
return nil, fmt.Errorf("grpc: invalid compression level: %d", level)
}
return &gzipCompressor{
pool: sync.Pool{
New: func() interface{} {
return gzip.NewWriter(ioutil.Discard)
w, err := gzip.NewWriterLevel(ioutil.Discard, level)
if err != nil {
panic(err)
}
return w
},
},
}
}, nil
}
func (c *gzipCompressor) Do(w io.Writer, p []byte) error {
z := c.pool.Get().(*gzip.Writer)
defer c.pool.Put(z)
z.Reset(w)
if _, err := z.Write(p); err != nil {
return err
@ -75,6 +103,8 @@ func (c *gzipCompressor) Type() string {
}
// Decompressor defines the interface gRPC uses to decompress a message.
//
// Deprecated: use package encoding.
type Decompressor interface {
// Do reads the data from r and uncompress them.
Do(r io.Reader) ([]byte, error)
@ -87,6 +117,8 @@ type gzipDecompressor struct {
}
// NewGZIPDecompressor creates a Decompressor based on GZIP.
//
// Deprecated: use package encoding/gzip.
func NewGZIPDecompressor() Decompressor {
return &gzipDecompressor{}
}
@ -121,17 +153,25 @@ func (d *gzipDecompressor) Type() string {
// callInfo contains all related configuration and information about an RPC.
type callInfo struct {
compressorType string
failFast bool
headerMD metadata.MD
trailerMD metadata.MD
peer *peer.Peer
stream *clientStream
traceInfo traceInfo // in trace.go
maxReceiveMessageSize *int
maxSendMessageSize *int
creds credentials.PerRPCCredentials
contentSubtype string
codec baseCodec
disableRetry bool
maxRetryRPCBufferSize int
}
var defaultCallInfo = callInfo{failFast: true}
func defaultCallInfo() *callInfo {
return &callInfo{
failFast: true,
maxRetryRPCBufferSize: 256 * 1024, // 256KB
}
}
// CallOption configures a Call before it starts or extracts information from
// a Call after it completes.
@ -153,87 +193,260 @@ type EmptyCallOption struct{}
func (EmptyCallOption) before(*callInfo) error { return nil }
func (EmptyCallOption) after(*callInfo) {}
type beforeCall func(c *callInfo) error
func (o beforeCall) before(c *callInfo) error { return o(c) }
func (o beforeCall) after(c *callInfo) {}
type afterCall func(c *callInfo)
func (o afterCall) before(c *callInfo) error { return nil }
func (o afterCall) after(c *callInfo) { o(c) }
// Header returns a CallOptions that retrieves the header metadata
// for a unary RPC.
func Header(md *metadata.MD) CallOption {
return afterCall(func(c *callInfo) {
*md = c.headerMD
})
return HeaderCallOption{HeaderAddr: md}
}
// HeaderCallOption is a CallOption for collecting response header metadata.
// The metadata field will be populated *after* the RPC completes.
// This is an EXPERIMENTAL API.
type HeaderCallOption struct {
HeaderAddr *metadata.MD
}
func (o HeaderCallOption) before(c *callInfo) error { return nil }
func (o HeaderCallOption) after(c *callInfo) {
if c.stream != nil {
*o.HeaderAddr, _ = c.stream.Header()
}
}
// Trailer returns a CallOptions that retrieves the trailer metadata
// for a unary RPC.
func Trailer(md *metadata.MD) CallOption {
return afterCall(func(c *callInfo) {
*md = c.trailerMD
})
return TrailerCallOption{TrailerAddr: md}
}
// Peer returns a CallOption that retrieves peer information for a
// unary RPC.
func Peer(peer *peer.Peer) CallOption {
return afterCall(func(c *callInfo) {
if c.peer != nil {
*peer = *c.peer
// TrailerCallOption is a CallOption for collecting response trailer metadata.
// The metadata field will be populated *after* the RPC completes.
// This is an EXPERIMENTAL API.
type TrailerCallOption struct {
TrailerAddr *metadata.MD
}
func (o TrailerCallOption) before(c *callInfo) error { return nil }
func (o TrailerCallOption) after(c *callInfo) {
if c.stream != nil {
*o.TrailerAddr = c.stream.Trailer()
}
}
// Peer returns a CallOption that retrieves peer information for a unary RPC.
// The peer field will be populated *after* the RPC completes.
func Peer(p *peer.Peer) CallOption {
return PeerCallOption{PeerAddr: p}
}
// PeerCallOption is a CallOption for collecting the identity of the remote
// peer. The peer field will be populated *after* the RPC completes.
// This is an EXPERIMENTAL API.
type PeerCallOption struct {
PeerAddr *peer.Peer
}
func (o PeerCallOption) before(c *callInfo) error { return nil }
func (o PeerCallOption) after(c *callInfo) {
if c.stream != nil {
if x, ok := peer.FromContext(c.stream.Context()); ok {
*o.PeerAddr = *x
}
})
}
}
// FailFast configures the action to take when an RPC is attempted on broken
// connections or unreachable servers. If failfast is true, the RPC will fail
// connections or unreachable servers. If failFast is true, the RPC will fail
// immediately. Otherwise, the RPC client will block the call until a
// connection is available (or the call is canceled or times out) and will retry
// the call if it fails due to a transient error. Please refer to
// connection is available (or the call is canceled or times out) and will
// retry the call if it fails due to a transient error. gRPC will not retry if
// data was written to the wire unless the server indicates it did not process
// the data. Please refer to
// https://github.com/grpc/grpc/blob/master/doc/wait-for-ready.md.
// Note: failFast is default to true.
//
// By default, RPCs are "Fail Fast".
func FailFast(failFast bool) CallOption {
return beforeCall(func(c *callInfo) error {
c.failFast = failFast
return nil
})
return FailFastCallOption{FailFast: failFast}
}
// FailFastCallOption is a CallOption for indicating whether an RPC should fail
// fast or not.
// This is an EXPERIMENTAL API.
type FailFastCallOption struct {
FailFast bool
}
func (o FailFastCallOption) before(c *callInfo) error {
c.failFast = o.FailFast
return nil
}
func (o FailFastCallOption) after(c *callInfo) {}
// MaxCallRecvMsgSize returns a CallOption which sets the maximum message size the client can receive.
func MaxCallRecvMsgSize(s int) CallOption {
return beforeCall(func(o *callInfo) error {
o.maxReceiveMessageSize = &s
return nil
})
return MaxRecvMsgSizeCallOption{MaxRecvMsgSize: s}
}
// MaxRecvMsgSizeCallOption is a CallOption that indicates the maximum message
// size the client can receive.
// This is an EXPERIMENTAL API.
type MaxRecvMsgSizeCallOption struct {
MaxRecvMsgSize int
}
func (o MaxRecvMsgSizeCallOption) before(c *callInfo) error {
c.maxReceiveMessageSize = &o.MaxRecvMsgSize
return nil
}
func (o MaxRecvMsgSizeCallOption) after(c *callInfo) {}
// MaxCallSendMsgSize returns a CallOption which sets the maximum message size the client can send.
func MaxCallSendMsgSize(s int) CallOption {
return beforeCall(func(o *callInfo) error {
o.maxSendMessageSize = &s
return nil
})
return MaxSendMsgSizeCallOption{MaxSendMsgSize: s}
}
// MaxSendMsgSizeCallOption is a CallOption that indicates the maximum message
// size the client can send.
// This is an EXPERIMENTAL API.
type MaxSendMsgSizeCallOption struct {
MaxSendMsgSize int
}
func (o MaxSendMsgSizeCallOption) before(c *callInfo) error {
c.maxSendMessageSize = &o.MaxSendMsgSize
return nil
}
func (o MaxSendMsgSizeCallOption) after(c *callInfo) {}
// PerRPCCredentials returns a CallOption that sets credentials.PerRPCCredentials
// for a call.
func PerRPCCredentials(creds credentials.PerRPCCredentials) CallOption {
return beforeCall(func(c *callInfo) error {
c.creds = creds
return nil
})
return PerRPCCredsCallOption{Creds: creds}
}
// PerRPCCredsCallOption is a CallOption that indicates the per-RPC
// credentials to use for the call.
// This is an EXPERIMENTAL API.
type PerRPCCredsCallOption struct {
Creds credentials.PerRPCCredentials
}
func (o PerRPCCredsCallOption) before(c *callInfo) error {
c.creds = o.Creds
return nil
}
func (o PerRPCCredsCallOption) after(c *callInfo) {}
// UseCompressor returns a CallOption which sets the compressor used when
// sending the request. If WithCompressor is also set, UseCompressor has
// higher priority.
//
// This API is EXPERIMENTAL.
func UseCompressor(name string) CallOption {
return CompressorCallOption{CompressorType: name}
}
// CompressorCallOption is a CallOption that indicates the compressor to use.
// This is an EXPERIMENTAL API.
type CompressorCallOption struct {
CompressorType string
}
func (o CompressorCallOption) before(c *callInfo) error {
c.compressorType = o.CompressorType
return nil
}
func (o CompressorCallOption) after(c *callInfo) {}
// CallContentSubtype returns a CallOption that will set the content-subtype
// for a call. For example, if content-subtype is "json", the Content-Type over
// the wire will be "application/grpc+json". The content-subtype is converted
// to lowercase before being included in Content-Type. See Content-Type on
// https://github.com/grpc/grpc/blob/master/doc/PROTOCOL-HTTP2.md#requests for
// more details.
//
// If CallCustomCodec is not also used, the content-subtype will be used to
// look up the Codec to use in the registry controlled by RegisterCodec. See
// the documentation on RegisterCodec for details on registration. The lookup
// of content-subtype is case-insensitive. If no such Codec is found, the call
// will result in an error with code codes.Internal.
//
// If CallCustomCodec is also used, that Codec will be used for all request and
// response messages, with the content-subtype set to the given contentSubtype
// here for requests.
func CallContentSubtype(contentSubtype string) CallOption {
return ContentSubtypeCallOption{ContentSubtype: strings.ToLower(contentSubtype)}
}
// ContentSubtypeCallOption is a CallOption that indicates the content-subtype
// used for marshaling messages.
// This is an EXPERIMENTAL API.
type ContentSubtypeCallOption struct {
ContentSubtype string
}
func (o ContentSubtypeCallOption) before(c *callInfo) error {
c.contentSubtype = o.ContentSubtype
return nil
}
func (o ContentSubtypeCallOption) after(c *callInfo) {}
// CallCustomCodec returns a CallOption that will set the given Codec to be
// used for all request and response messages for a call. The result of calling
// String() will be used as the content-subtype in a case-insensitive manner.
//
// See Content-Type on
// https://github.com/grpc/grpc/blob/master/doc/PROTOCOL-HTTP2.md#requests for
// more details. Also see the documentation on RegisterCodec and
// CallContentSubtype for more details on the interaction between Codec and
// content-subtype.
//
// This function is provided for advanced users; prefer to use only
// CallContentSubtype to select a registered codec instead.
func CallCustomCodec(codec Codec) CallOption {
return CustomCodecCallOption{Codec: codec}
}
// CustomCodecCallOption is a CallOption that indicates the codec used for
// marshaling messages.
// This is an EXPERIMENTAL API.
type CustomCodecCallOption struct {
Codec Codec
}
func (o CustomCodecCallOption) before(c *callInfo) error {
c.codec = o.Codec
return nil
}
func (o CustomCodecCallOption) after(c *callInfo) {}
// MaxRetryRPCBufferSize returns a CallOption that limits the amount of memory
// used for buffering this RPC's requests for retry purposes.
//
// This API is EXPERIMENTAL.
func MaxRetryRPCBufferSize(bytes int) CallOption {
return MaxRetryRPCBufferSizeCallOption{bytes}
}
// MaxRetryRPCBufferSizeCallOption is a CallOption indicating the amount of
// memory to be used for caching this RPC for retry purposes.
// This is an EXPERIMENTAL API.
type MaxRetryRPCBufferSizeCallOption struct {
MaxRetryRPCBufferSize int
}
func (o MaxRetryRPCBufferSizeCallOption) before(c *callInfo) error {
c.maxRetryRPCBufferSize = o.MaxRetryRPCBufferSize
return nil
}
func (o MaxRetryRPCBufferSizeCallOption) after(c *callInfo) {}
// The format of the payload: compressed or not?
type payloadFormat uint8
const (
compressionNone payloadFormat = iota // no compression
compressionMade
compressionNone payloadFormat = 0 // no compression
compressionMade payloadFormat = 1 // compressed
)
// parser reads complete gRPC messages from the underlying reader.
@ -243,8 +456,8 @@ type parser struct {
// error types.
r io.Reader
// The header of a gRPC message. Find more detail
// at https://grpc.io/docs/guides/wire.html.
// The header of a gRPC message. Find more detail at
// https://github.com/grpc/grpc/blob/master/doc/PROTOCOL-HTTP2.md
header [5]byte
}
@ -257,7 +470,7 @@ type parser struct {
// * io.EOF, when no messages remain
// * io.ErrUnexpectedEOF
// * of type transport.ConnectionError
// * of type transport.StreamError
// * an error from the status package
// No other error values or types must be returned, which also means
// that the underlying io.Reader must not return an incompatible
// error.
@ -272,8 +485,11 @@ func (p *parser) recvMsg(maxReceiveMessageSize int) (pf payloadFormat, msg []byt
if length == 0 {
return pf, nil, nil
}
if length > uint32(maxReceiveMessageSize) {
return 0, nil, Errorf(codes.ResourceExhausted, "grpc: received message larger than max (%d vs. %d)", length, maxReceiveMessageSize)
if int64(length) > int64(maxInt) {
return 0, nil, status.Errorf(codes.ResourceExhausted, "grpc: received message larger than max length allowed on current machine (%d vs. %d)", length, maxInt)
}
if int(length) > maxReceiveMessageSize {
return 0, nil, status.Errorf(codes.ResourceExhausted, "grpc: received message larger than max (%d vs. %d)", length, maxReceiveMessageSize)
}
// TODO(bradfitz,zhaoq): garbage. reuse buffer after proto decoding instead
// of making it for each message:
@ -287,77 +503,104 @@ func (p *parser) recvMsg(maxReceiveMessageSize int) (pf payloadFormat, msg []byt
return pf, msg, nil
}
// encode serializes msg and prepends the message header. If msg is nil, it
// generates the message header of 0 message length.
func encode(c Codec, msg interface{}, cp Compressor, cbuf *bytes.Buffer, outPayload *stats.OutPayload) ([]byte, error) {
var (
b []byte
length uint
)
if msg != nil {
var err error
// TODO(zhaoq): optimize to reduce memory alloc and copying.
b, err = c.Marshal(msg)
if err != nil {
return nil, Errorf(codes.Internal, "grpc: error while marshaling: %v", err.Error())
}
if outPayload != nil {
outPayload.Payload = msg
// TODO truncate large payload.
outPayload.Data = b
outPayload.Length = len(b)
}
if cp != nil {
if err := cp.Do(cbuf, b); err != nil {
return nil, Errorf(codes.Internal, "grpc: error while compressing: %v", err.Error())
}
b = cbuf.Bytes()
}
length = uint(len(b))
// encode serializes msg and returns a buffer containing the message, or an
// error if it is too large to be transmitted by grpc. If msg is nil, it
// generates an empty message.
func encode(c baseCodec, msg interface{}) ([]byte, error) {
if msg == nil { // NOTE: typed nils will not be caught by this check
return nil, nil
}
if length > math.MaxUint32 {
return nil, Errorf(codes.ResourceExhausted, "grpc: message too large (%d bytes)", length)
b, err := c.Marshal(msg)
if err != nil {
return nil, status.Errorf(codes.Internal, "grpc: error while marshaling: %v", err.Error())
}
const (
payloadLen = 1
sizeLen = 4
)
var buf = make([]byte, payloadLen+sizeLen+len(b))
// Write payload format
if cp == nil {
buf[0] = byte(compressionNone)
} else {
buf[0] = byte(compressionMade)
if uint(len(b)) > math.MaxUint32 {
return nil, status.Errorf(codes.ResourceExhausted, "grpc: message too large (%d bytes)", len(b))
}
// Write length of b into buf
binary.BigEndian.PutUint32(buf[1:], uint32(length))
// Copy encoded msg to buf
copy(buf[5:], b)
if outPayload != nil {
outPayload.WireLength = len(buf)
}
return buf, nil
return b, nil
}
func checkRecvPayload(pf payloadFormat, recvCompress string, dc Decompressor) error {
// compress returns the input bytes compressed by compressor or cp. If both
// compressors are nil, returns nil.
//
// TODO(dfawley): eliminate cp parameter by wrapping Compressor in an encoding.Compressor.
func compress(in []byte, cp Compressor, compressor encoding.Compressor) ([]byte, error) {
if compressor == nil && cp == nil {
return nil, nil
}
wrapErr := func(err error) error {
return status.Errorf(codes.Internal, "grpc: error while compressing: %v", err.Error())
}
cbuf := &bytes.Buffer{}
if compressor != nil {
z, _ := compressor.Compress(cbuf)
if _, err := z.Write(in); err != nil {
return nil, wrapErr(err)
}
if err := z.Close(); err != nil {
return nil, wrapErr(err)
}
} else {
if err := cp.Do(cbuf, in); err != nil {
return nil, wrapErr(err)
}
}
return cbuf.Bytes(), nil
}
const (
payloadLen = 1
sizeLen = 4
headerLen = payloadLen + sizeLen
)
// msgHeader returns a 5-byte header for the message being transmitted and the
// payload, which is compData if non-nil or data otherwise.
func msgHeader(data, compData []byte) (hdr []byte, payload []byte) {
hdr = make([]byte, headerLen)
if compData != nil {
hdr[0] = byte(compressionMade)
data = compData
} else {
hdr[0] = byte(compressionNone)
}
// Write length of payload into buf
binary.BigEndian.PutUint32(hdr[payloadLen:], uint32(len(data)))
return hdr, data
}
func outPayload(client bool, msg interface{}, data, payload []byte, t time.Time) *stats.OutPayload {
return &stats.OutPayload{
Client: client,
Payload: msg,
Data: data,
Length: len(data),
WireLength: len(payload) + headerLen,
SentTime: t,
}
}
func checkRecvPayload(pf payloadFormat, recvCompress string, haveCompressor bool) *status.Status {
switch pf {
case compressionNone:
case compressionMade:
if dc == nil || recvCompress != dc.Type() {
return Errorf(codes.Unimplemented, "grpc: Decompressor is not installed for grpc-encoding %q", recvCompress)
if recvCompress == "" || recvCompress == encoding.Identity {
return status.New(codes.Internal, "grpc: compressed flag set with identity or empty encoding")
}
if !haveCompressor {
return status.Newf(codes.Unimplemented, "grpc: Decompressor is not installed for grpc-encoding %q", recvCompress)
}
default:
return Errorf(codes.Internal, "grpc: received unexpected payload format %d", pf)
return status.Newf(codes.Internal, "grpc: received unexpected payload format %d", pf)
}
return nil
}
func recv(p *parser, c Codec, s *transport.Stream, dc Decompressor, m interface{}, maxReceiveMessageSize int, inPayload *stats.InPayload) error {
// For the two compressor parameters, both should not be set, but if they are,
// dc takes precedence over compressor.
// TODO(dfawley): wrap the old compressor/decompressor using the new API?
func recv(p *parser, c baseCodec, s *transport.Stream, dc Decompressor, m interface{}, maxReceiveMessageSize int, inPayload *stats.InPayload, compressor encoding.Compressor) error {
pf, d, err := p.recvMsg(maxReceiveMessageSize)
if err != nil {
return err
@ -365,22 +608,37 @@ func recv(p *parser, c Codec, s *transport.Stream, dc Decompressor, m interface{
if inPayload != nil {
inPayload.WireLength = len(d)
}
if err := checkRecvPayload(pf, s.RecvCompress(), dc); err != nil {
return err
if st := checkRecvPayload(pf, s.RecvCompress(), compressor != nil || dc != nil); st != nil {
return st.Err()
}
if pf == compressionMade {
d, err = dc.Do(bytes.NewReader(d))
if err != nil {
return Errorf(codes.Internal, "grpc: failed to decompress the received message %v", err)
// To match legacy behavior, if the decompressor is set by WithDecompressor or RPCDecompressor,
// use this decompressor as the default.
if dc != nil {
d, err = dc.Do(bytes.NewReader(d))
if err != nil {
return status.Errorf(codes.Internal, "grpc: failed to decompress the received message %v", err)
}
} else {
dcReader, err := compressor.Decompress(bytes.NewReader(d))
if err != nil {
return status.Errorf(codes.Internal, "grpc: failed to decompress the received message %v", err)
}
d, err = ioutil.ReadAll(dcReader)
if err != nil {
return status.Errorf(codes.Internal, "grpc: failed to decompress the received message %v", err)
}
}
}
if len(d) > maxReceiveMessageSize {
// TODO: Revisit the error code. Currently keep it consistent with java
// implementation.
return Errorf(codes.ResourceExhausted, "grpc: received message larger than max (%d vs. %d)", len(d), maxReceiveMessageSize)
return status.Errorf(codes.ResourceExhausted, "grpc: received message larger than max (%d vs. %d)", len(d), maxReceiveMessageSize)
}
if err := c.Unmarshal(d, m); err != nil {
return Errorf(codes.Internal, "grpc: failed to unmarshal the received message %v", err)
return status.Errorf(codes.Internal, "grpc: failed to unmarshal the received message %v", err)
}
if inPayload != nil {
inPayload.RecvTime = time.Now()
@ -393,14 +651,13 @@ func recv(p *parser, c Codec, s *transport.Stream, dc Decompressor, m interface{
}
type rpcInfo struct {
bytesSent bool
bytesReceived bool
failfast bool
}
type rpcInfoContextKey struct{}
func newContextWithRPCInfo(ctx context.Context) context.Context {
return context.WithValue(ctx, rpcInfoContextKey{}, &rpcInfo{})
func newContextWithRPCInfo(ctx context.Context, failfast bool) context.Context {
return context.WithValue(ctx, rpcInfoContextKey{}, &rpcInfo{failfast: failfast})
}
func rpcInfoFromContext(ctx context.Context) (s *rpcInfo, ok bool) {
@ -408,17 +665,10 @@ func rpcInfoFromContext(ctx context.Context) (s *rpcInfo, ok bool) {
return
}
func updateRPCInfoInContext(ctx context.Context, s rpcInfo) {
if ss, ok := rpcInfoFromContext(ctx); ok {
*ss = s
}
return
}
// Code returns the error code for err if it was produced by the rpc system.
// Otherwise, it returns codes.Unknown.
//
// Deprecated; use status.FromError and Code method instead.
// Deprecated: use status.FromError and Code method instead.
func Code(err error) codes.Code {
if s, ok := status.FromError(err); ok {
return s.Code()
@ -429,7 +679,7 @@ func Code(err error) codes.Code {
// ErrorDesc returns the error description of err if it was produced by the rpc system.
// Otherwise, it returns err.Error() or empty string when err is nil.
//
// Deprecated; use status.FromError and Message method instead.
// Deprecated: use status.FromError and Message method instead.
func ErrorDesc(err error) string {
if s, ok := status.FromError(err); ok {
return s.Message()
@ -440,85 +690,78 @@ func ErrorDesc(err error) string {
// Errorf returns an error containing an error code and a description;
// Errorf returns nil if c is OK.
//
// Deprecated; use status.Errorf instead.
// Deprecated: use status.Errorf instead.
func Errorf(c codes.Code, format string, a ...interface{}) error {
return status.Errorf(c, format, a...)
}
// MethodConfig defines the configuration recommended by the service providers for a
// particular method.
// This is EXPERIMENTAL and subject to change.
type MethodConfig struct {
// WaitForReady indicates whether RPCs sent to this method should wait until
// the connection is ready by default (!failfast). The value specified via the
// gRPC client API will override the value set here.
WaitForReady *bool
// Timeout is the default timeout for RPCs sent to this method. The actual
// deadline used will be the minimum of the value specified here and the value
// set by the application via the gRPC client API. If either one is not set,
// then the other will be used. If neither is set, then the RPC has no deadline.
Timeout *time.Duration
// MaxReqSize is the maximum allowed payload size for an individual request in a
// stream (client->server) in bytes. The size which is measured is the serialized
// payload after per-message compression (but before stream compression) in bytes.
// The actual value used is the minumum of the value specified here and the value set
// by the application via the gRPC client API. If either one is not set, then the other
// will be used. If neither is set, then the built-in default is used.
MaxReqSize *int
// MaxRespSize is the maximum allowed payload size for an individual response in a
// stream (server->client) in bytes.
MaxRespSize *int
// setCallInfoCodec should only be called after CallOptions have been applied.
func setCallInfoCodec(c *callInfo) error {
if c.codec != nil {
// codec was already set by a CallOption; use it.
return nil
}
if c.contentSubtype == "" {
// No codec specified in CallOptions; use proto by default.
c.codec = encoding.GetCodec(proto.Name)
return nil
}
// c.contentSubtype is already lowercased in CallContentSubtype
c.codec = encoding.GetCodec(c.contentSubtype)
if c.codec == nil {
return status.Errorf(codes.Internal, "no codec registered for content-subtype %s", c.contentSubtype)
}
return nil
}
// ServiceConfig is provided by the service provider and contains parameters for how
// clients that connect to the service should behave.
// This is EXPERIMENTAL and subject to change.
type ServiceConfig struct {
// LB is the load balancer the service providers recommends. The balancer specified
// via grpc.WithBalancer will override this.
LB Balancer
// Methods contains a map for the methods in this service.
// If there is an exact match for a method (i.e. /service/method) in the map, use the corresponding MethodConfig.
// If there's no exact match, look for the default config for the service (/service/) and use the corresponding MethodConfig if it exists.
// Otherwise, the method has no MethodConfig to use.
Methods map[string]MethodConfig
// parseDialTarget returns the network and address to pass to dialer
func parseDialTarget(target string) (net string, addr string) {
net = "tcp"
m1 := strings.Index(target, ":")
m2 := strings.Index(target, ":/")
// handle unix:addr which will fail with url.Parse
if m1 >= 0 && m2 < 0 {
if n := target[0:m1]; n == "unix" {
net = n
addr = target[m1+1:]
return net, addr
}
}
if m2 >= 0 {
t, err := url.Parse(target)
if err != nil {
return net, target
}
scheme := t.Scheme
addr = t.Path
if scheme == "unix" {
net = scheme
if addr == "" {
addr = t.Host
}
return net, addr
}
}
return net, target
}
func min(a, b *int) *int {
if *a < *b {
return a
}
return b
}
func getMaxSize(mcMax, doptMax *int, defaultVal int) *int {
if mcMax == nil && doptMax == nil {
return &defaultVal
}
if mcMax != nil && doptMax != nil {
return min(mcMax, doptMax)
}
if mcMax != nil {
return mcMax
}
return doptMax
}
// SupportPackageIsVersion3 is referenced from generated protocol buffer files.
// The latest support package version is 4.
// SupportPackageIsVersion3 is kept for compability. It will be removed in the
// next support package version update.
const SupportPackageIsVersion3 = true
// SupportPackageIsVersion4 is referenced from generated protocol buffer files
// to assert that that code is compatible with this version of the grpc package.
// The SupportPackageIsVersion variables are referenced from generated protocol
// buffer files to ensure compatibility with the gRPC version used. The latest
// support package version is 5.
//
// This constant may be renamed in the future if a change in the generated code
// requires a synchronised update of grpc-go and protoc-gen-go. This constant
// should not be referenced from any other code.
const SupportPackageIsVersion4 = true
// Version is the current grpc version.
const Version = "1.6.0-dev"
// Older versions are kept for compatibility. They may be removed if
// compatibility cannot be maintained.
//
// These constants should not be referenced from any other code.
const (
SupportPackageIsVersion3 = true
SupportPackageIsVersion4 = true
SupportPackageIsVersion5 = true
)
const grpcUA = "grpc-go/" + Version

642
vendor/google.golang.org/grpc/server.go generated vendored
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358
vendor/google.golang.org/grpc/service_config.go generated vendored Normal file
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@ -0,0 +1,358 @@
/*
*
* Copyright 2017 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package grpc
import (
"encoding/json"
"fmt"
"strconv"
"strings"
"time"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/grpclog"
)
const maxInt = int(^uint(0) >> 1)
// MethodConfig defines the configuration recommended by the service providers for a
// particular method.
//
// Deprecated: Users should not use this struct. Service config should be received
// through name resolver, as specified here
// https://github.com/grpc/grpc/blob/master/doc/service_config.md
type MethodConfig struct {
// WaitForReady indicates whether RPCs sent to this method should wait until
// the connection is ready by default (!failfast). The value specified via the
// gRPC client API will override the value set here.
WaitForReady *bool
// Timeout is the default timeout for RPCs sent to this method. The actual
// deadline used will be the minimum of the value specified here and the value
// set by the application via the gRPC client API. If either one is not set,
// then the other will be used. If neither is set, then the RPC has no deadline.
Timeout *time.Duration
// MaxReqSize is the maximum allowed payload size for an individual request in a
// stream (client->server) in bytes. The size which is measured is the serialized
// payload after per-message compression (but before stream compression) in bytes.
// The actual value used is the minimum of the value specified here and the value set
// by the application via the gRPC client API. If either one is not set, then the other
// will be used. If neither is set, then the built-in default is used.
MaxReqSize *int
// MaxRespSize is the maximum allowed payload size for an individual response in a
// stream (server->client) in bytes.
MaxRespSize *int
// RetryPolicy configures retry options for the method.
retryPolicy *retryPolicy
}
// ServiceConfig is provided by the service provider and contains parameters for how
// clients that connect to the service should behave.
//
// Deprecated: Users should not use this struct. Service config should be received
// through name resolver, as specified here
// https://github.com/grpc/grpc/blob/master/doc/service_config.md
type ServiceConfig struct {
// LB is the load balancer the service providers recommends. The balancer specified
// via grpc.WithBalancer will override this.
LB *string
// Methods contains a map for the methods in this service. If there is an
// exact match for a method (i.e. /service/method) in the map, use the
// corresponding MethodConfig. If there's no exact match, look for the
// default config for the service (/service/) and use the corresponding
// MethodConfig if it exists. Otherwise, the method has no MethodConfig to
// use.
Methods map[string]MethodConfig
// If a retryThrottlingPolicy is provided, gRPC will automatically throttle
// retry attempts and hedged RPCs when the client’s ratio of failures to
// successes exceeds a threshold.
//
// For each server name, the gRPC client will maintain a token_count which is
// initially set to maxTokens, and can take values between 0 and maxTokens.
//
// Every outgoing RPC (regardless of service or method invoked) will change
// token_count as follows:
//
// - Every failed RPC will decrement the token_count by 1.
// - Every successful RPC will increment the token_count by tokenRatio.
//
// If token_count is less than or equal to maxTokens / 2, then RPCs will not
// be retried and hedged RPCs will not be sent.
retryThrottling *retryThrottlingPolicy
}
// retryPolicy defines the go-native version of the retry policy defined by the
// service config here:
// https://github.com/grpc/proposal/blob/master/A6-client-retries.md#integration-with-service-config
type retryPolicy struct {
// MaxAttempts is the maximum number of attempts, including the original RPC.
//
// This field is required and must be two or greater.
maxAttempts int
// Exponential backoff parameters. The initial retry attempt will occur at
// random(0, initialBackoffMS). In general, the nth attempt will occur at
// random(0,
// min(initialBackoffMS*backoffMultiplier**(n-1), maxBackoffMS)).
//
// These fields are required and must be greater than zero.
initialBackoff time.Duration
maxBackoff time.Duration
backoffMultiplier float64
// The set of status codes which may be retried.
//
// Status codes are specified as strings, e.g., "UNAVAILABLE".
//
// This field is required and must be non-empty.
// Note: a set is used to store this for easy lookup.
retryableStatusCodes map[codes.Code]bool
}
type jsonRetryPolicy struct {
MaxAttempts int
InitialBackoff string
MaxBackoff string
BackoffMultiplier float64
RetryableStatusCodes []codes.Code
}
// retryThrottlingPolicy defines the go-native version of the retry throttling
// policy defined by the service config here:
// https://github.com/grpc/proposal/blob/master/A6-client-retries.md#integration-with-service-config
type retryThrottlingPolicy struct {
// The number of tokens starts at maxTokens. The token_count will always be
// between 0 and maxTokens.
//
// This field is required and must be greater than zero.
MaxTokens float64
// The amount of tokens to add on each successful RPC. Typically this will
// be some number between 0 and 1, e.g., 0.1.
//
// This field is required and must be greater than zero. Up to 3 decimal
// places are supported.
TokenRatio float64
}
func parseDuration(s *string) (*time.Duration, error) {
if s == nil {
return nil, nil
}
if !strings.HasSuffix(*s, "s") {
return nil, fmt.Errorf("malformed duration %q", *s)
}
ss := strings.SplitN((*s)[:len(*s)-1], ".", 3)
if len(ss) > 2 {
return nil, fmt.Errorf("malformed duration %q", *s)
}
// hasDigits is set if either the whole or fractional part of the number is
// present, since both are optional but one is required.
hasDigits := false
var d time.Duration
if len(ss[0]) > 0 {
i, err := strconv.ParseInt(ss[0], 10, 32)
if err != nil {
return nil, fmt.Errorf("malformed duration %q: %v", *s, err)
}
d = time.Duration(i) * time.Second
hasDigits = true
}
if len(ss) == 2 && len(ss[1]) > 0 {
if len(ss[1]) > 9 {
return nil, fmt.Errorf("malformed duration %q", *s)
}
f, err := strconv.ParseInt(ss[1], 10, 64)
if err != nil {
return nil, fmt.Errorf("malformed duration %q: %v", *s, err)
}
for i := 9; i > len(ss[1]); i-- {
f *= 10
}
d += time.Duration(f)
hasDigits = true
}
if !hasDigits {
return nil, fmt.Errorf("malformed duration %q", *s)
}
return &d, nil
}
type jsonName struct {
Service *string
Method *string
}
func (j jsonName) generatePath() (string, bool) {
if j.Service == nil {
return "", false
}
res := "/" + *j.Service + "/"
if j.Method != nil {
res += *j.Method
}
return res, true
}
// TODO(lyuxuan): delete this struct after cleaning up old service config implementation.
type jsonMC struct {
Name *[]jsonName
WaitForReady *bool
Timeout *string
MaxRequestMessageBytes *int64
MaxResponseMessageBytes *int64
RetryPolicy *jsonRetryPolicy
}
// TODO(lyuxuan): delete this struct after cleaning up old service config implementation.
type jsonSC struct {
LoadBalancingPolicy *string
MethodConfig *[]jsonMC
RetryThrottling *retryThrottlingPolicy
}
func parseServiceConfig(js string) (ServiceConfig, error) {
var rsc jsonSC
err := json.Unmarshal([]byte(js), &rsc)
if err != nil {
grpclog.Warningf("grpc: parseServiceConfig error unmarshaling %s due to %v", js, err)
return ServiceConfig{}, err
}
sc := ServiceConfig{
LB: rsc.LoadBalancingPolicy,
Methods: make(map[string]MethodConfig),
retryThrottling: rsc.RetryThrottling,
}
if rsc.MethodConfig == nil {
return sc, nil
}
for _, m := range *rsc.MethodConfig {
if m.Name == nil {
continue
}
d, err := parseDuration(m.Timeout)
if err != nil {
grpclog.Warningf("grpc: parseServiceConfig error unmarshaling %s due to %v", js, err)
return ServiceConfig{}, err
}
mc := MethodConfig{
WaitForReady: m.WaitForReady,
Timeout: d,
}
if mc.retryPolicy, err = convertRetryPolicy(m.RetryPolicy); err != nil {
grpclog.Warningf("grpc: parseServiceConfig error unmarshaling %s due to %v", js, err)
return ServiceConfig{}, err
}
if m.MaxRequestMessageBytes != nil {
if *m.MaxRequestMessageBytes > int64(maxInt) {
mc.MaxReqSize = newInt(maxInt)
} else {
mc.MaxReqSize = newInt(int(*m.MaxRequestMessageBytes))
}
}
if m.MaxResponseMessageBytes != nil {
if *m.MaxResponseMessageBytes > int64(maxInt) {
mc.MaxRespSize = newInt(maxInt)
} else {
mc.MaxRespSize = newInt(int(*m.MaxResponseMessageBytes))
}
}
for _, n := range *m.Name {
if path, valid := n.generatePath(); valid {
sc.Methods[path] = mc
}
}
}
if sc.retryThrottling != nil {
if sc.retryThrottling.MaxTokens <= 0 ||
sc.retryThrottling.MaxTokens >= 1000 ||
sc.retryThrottling.TokenRatio <= 0 {
// Illegal throttling config; disable throttling.
sc.retryThrottling = nil
}
}
return sc, nil
}
func convertRetryPolicy(jrp *jsonRetryPolicy) (p *retryPolicy, err error) {
if jrp == nil {
return nil, nil
}
ib, err := parseDuration(&jrp.InitialBackoff)
if err != nil {
return nil, err
}
mb, err := parseDuration(&jrp.MaxBackoff)
if err != nil {
return nil, err
}
if jrp.MaxAttempts <= 1 ||
*ib <= 0 ||
*mb <= 0 ||
jrp.BackoffMultiplier <= 0 ||
len(jrp.RetryableStatusCodes) == 0 {
grpclog.Warningf("grpc: ignoring retry policy %v due to illegal configuration", jrp)
return nil, nil
}
rp := &retryPolicy{
maxAttempts: jrp.MaxAttempts,
initialBackoff: *ib,
maxBackoff: *mb,
backoffMultiplier: jrp.BackoffMultiplier,
retryableStatusCodes: make(map[codes.Code]bool),
}
if rp.maxAttempts > 5 {
// TODO(retry): Make the max maxAttempts configurable.
rp.maxAttempts = 5
}
for _, code := range jrp.RetryableStatusCodes {
rp.retryableStatusCodes[code] = true
}
return rp, nil
}
func min(a, b *int) *int {
if *a < *b {
return a
}
return b
}
func getMaxSize(mcMax, doptMax *int, defaultVal int) *int {
if mcMax == nil && doptMax == nil {
return &defaultVal
}
if mcMax != nil && doptMax != nil {
return min(mcMax, doptMax)
}
if mcMax != nil {
return mcMax
}
return doptMax
}
func newInt(b int) *int {
return &b
}

90
vendor/google.golang.org/grpc/stats/stats.go generated vendored
View File

@ -16,6 +16,8 @@
*
*/
//go:generate protoc --go_out=plugins=grpc:. grpc_testing/test.proto
// Package stats is for collecting and reporting various network and RPC stats.
// This package is for monitoring purpose only. All fields are read-only.
// All APIs are experimental.
@ -24,6 +26,8 @@ package stats // import "google.golang.org/grpc/stats"
import (
"net"
"time"
"golang.org/x/net/context"
)
// RPCStats contains stats information about RPCs.
@ -131,8 +135,6 @@ func (s *OutPayload) isRPCStats() {}
type OutHeader struct {
// Client is true if this OutHeader is from client side.
Client bool
// WireLength is the wire length of header.
WireLength int
// The following fields are valid only if Client is true.
// FullMethod is the full RPC method string, i.e., /package.service/method.
@ -167,6 +169,8 @@ func (s *OutTrailer) isRPCStats() {}
type End struct {
// Client is true if this End is from client side.
Client bool
// BeginTime is the time when the RPC began.
BeginTime time.Time
// EndTime is the time when the RPC ends.
EndTime time.Time
// Error is the error the RPC ended with. It is an error generated from
@ -208,3 +212,85 @@ type ConnEnd struct {
func (s *ConnEnd) IsClient() bool { return s.Client }
func (s *ConnEnd) isConnStats() {}
type incomingTagsKey struct{}
type outgoingTagsKey struct{}
// SetTags attaches stats tagging data to the context, which will be sent in
// the outgoing RPC with the header grpc-tags-bin. Subsequent calls to
// SetTags will overwrite the values from earlier calls.
//
// NOTE: this is provided only for backward compatibility with existing clients
// and will likely be removed in an upcoming release. New uses should transmit
// this type of data using metadata with a different, non-reserved (i.e. does
// not begin with "grpc-") header name.
func SetTags(ctx context.Context, b []byte) context.Context {
return context.WithValue(ctx, outgoingTagsKey{}, b)
}
// Tags returns the tags from the context for the inbound RPC.
//
// NOTE: this is provided only for backward compatibility with existing clients
// and will likely be removed in an upcoming release. New uses should transmit
// this type of data using metadata with a different, non-reserved (i.e. does
// not begin with "grpc-") header name.
func Tags(ctx context.Context) []byte {
b, _ := ctx.Value(incomingTagsKey{}).([]byte)
return b
}
// SetIncomingTags attaches stats tagging data to the context, to be read by
// the application (not sent in outgoing RPCs).
//
// This is intended for gRPC-internal use ONLY.
func SetIncomingTags(ctx context.Context, b []byte) context.Context {
return context.WithValue(ctx, incomingTagsKey{}, b)
}
// OutgoingTags returns the tags from the context for the outbound RPC.
//
// This is intended for gRPC-internal use ONLY.
func OutgoingTags(ctx context.Context) []byte {
b, _ := ctx.Value(outgoingTagsKey{}).([]byte)
return b
}
type incomingTraceKey struct{}
type outgoingTraceKey struct{}
// SetTrace attaches stats tagging data to the context, which will be sent in
// the outgoing RPC with the header grpc-trace-bin. Subsequent calls to
// SetTrace will overwrite the values from earlier calls.
//
// NOTE: this is provided only for backward compatibility with existing clients
// and will likely be removed in an upcoming release. New uses should transmit
// this type of data using metadata with a different, non-reserved (i.e. does
// not begin with "grpc-") header name.
func SetTrace(ctx context.Context, b []byte) context.Context {
return context.WithValue(ctx, outgoingTraceKey{}, b)
}
// Trace returns the trace from the context for the inbound RPC.
//
// NOTE: this is provided only for backward compatibility with existing clients
// and will likely be removed in an upcoming release. New uses should transmit
// this type of data using metadata with a different, non-reserved (i.e. does
// not begin with "grpc-") header name.
func Trace(ctx context.Context) []byte {
b, _ := ctx.Value(incomingTraceKey{}).([]byte)
return b
}
// SetIncomingTrace attaches stats tagging data to the context, to be read by
// the application (not sent in outgoing RPCs). It is intended for
// gRPC-internal use.
func SetIncomingTrace(ctx context.Context, b []byte) context.Context {
return context.WithValue(ctx, incomingTraceKey{}, b)
}
// OutgoingTrace returns the trace from the context for the outbound RPC. It is
// intended for gRPC-internal use.
func OutgoingTrace(ctx context.Context) []byte {
b, _ := ctx.Value(outgoingTraceKey{}).([]byte)
return b
}

42
vendor/google.golang.org/grpc/status/go16.go generated vendored Normal file
View File

@ -0,0 +1,42 @@
// +build go1.6,!go1.7
/*
*
* Copyright 2018 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package status
import (
"golang.org/x/net/context"
"google.golang.org/grpc/codes"
)
// FromContextError converts a context error into a Status. It returns a
// Status with codes.OK if err is nil, or a Status with codes.Unknown if err is
// non-nil and not a context error.
func FromContextError(err error) *Status {
switch err {
case nil:
return New(codes.OK, "")
case context.DeadlineExceeded:
return New(codes.DeadlineExceeded, err.Error())
case context.Canceled:
return New(codes.Canceled, err.Error())
default:
return New(codes.Unknown, err.Error())
}
}

44
vendor/google.golang.org/grpc/status/go17.go generated vendored Normal file
View File

@ -0,0 +1,44 @@
// +build go1.7
/*
*
* Copyright 2018 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package status
import (
"context"
netctx "golang.org/x/net/context"
"google.golang.org/grpc/codes"
)
// FromContextError converts a context error into a Status. It returns a
// Status with codes.OK if err is nil, or a Status with codes.Unknown if err is
// non-nil and not a context error.
func FromContextError(err error) *Status {
switch err {
case nil:
return New(codes.OK, "")
case context.DeadlineExceeded, netctx.DeadlineExceeded:
return New(codes.DeadlineExceeded, err.Error())
case context.Canceled, netctx.Canceled:
return New(codes.Canceled, err.Error())
default:
return New(codes.Unknown, err.Error())
}
}

31
vendor/google.golang.org/grpc/status/status.go generated vendored
View File

@ -46,7 +46,7 @@ func (se *statusError) Error() string {
return fmt.Sprintf("rpc error: code = %s desc = %s", codes.Code(p.GetCode()), p.GetMessage())
}
func (se *statusError) status() *Status {
func (se *statusError) GRPCStatus() *Status {
return &Status{s: (*spb.Status)(se)}
}
@ -120,15 +120,23 @@ func FromProto(s *spb.Status) *Status {
}
// FromError returns a Status representing err if it was produced from this
// package, otherwise it returns nil, false.
// package or has a method `GRPCStatus() *Status`. Otherwise, ok is false and a
// Status is returned with codes.Unknown and the original error message.
func FromError(err error) (s *Status, ok bool) {
if err == nil {
return &Status{s: &spb.Status{Code: int32(codes.OK)}}, true
}
if s, ok := err.(*statusError); ok {
return s.status(), true
if se, ok := err.(interface{ GRPCStatus() *Status }); ok {
return se.GRPCStatus(), true
}
return nil, false
return New(codes.Unknown, err.Error()), false
}
// Convert is a convenience function which removes the need to handle the
// boolean return value from FromError.
func Convert(err error) *Status {
s, _ := FromError(err)
return s
}
// WithDetails returns a new status with the provided details messages appended to the status.
@ -166,3 +174,16 @@ func (s *Status) Details() []interface{} {
}
return details
}
// Code returns the Code of the error if it is a Status error, codes.OK if err
// is nil, or codes.Unknown otherwise.
func Code(err error) codes.Code {
// Don't use FromError to avoid allocation of OK status.
if err == nil {
return codes.OK
}
if se, ok := err.(interface{ GRPCStatus() *Status }); ok {
return se.GRPCStatus().Code()
}
return codes.Unknown
}

1098
vendor/google.golang.org/grpc/stream.go generated vendored
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20
vendor/google.golang.org/grpc/tap/tap.go generated vendored
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@ -32,8 +32,20 @@ type Info struct {
// TODO: More to be added.
}
// ServerInHandle defines the function which runs when a new stream is created
// on the server side. Note that it is executed in the per-connection I/O goroutine(s) instead
// of per-RPC goroutine. Therefore, users should NOT have any blocking/time-consuming
// work in this handle. Otherwise all the RPCs would slow down.
// ServerInHandle defines the function which runs before a new stream is created
// on the server side. If it returns a non-nil error, the stream will not be
// created and a RST_STREAM will be sent back to the client with REFUSED_STREAM.
// The client will receive an RPC error "code = Unavailable, desc = stream
// terminated by RST_STREAM with error code: REFUSED_STREAM".
//
// It's intended to be used in situations where you don't want to waste the
// resources to accept the new stream (e.g. rate-limiting). And the content of
// the error will be ignored and won't be sent back to the client. For other
// general usages, please use interceptors.
//
// Note that it is executed in the per-connection I/O goroutine(s) instead of
// per-RPC goroutine. Therefore, users should NOT have any
// blocking/time-consuming work in this handle. Otherwise all the RPCs would
// slow down. Also, for the same reason, this handle won't be called
// concurrently by gRPC.
type ServerInHandle func(ctx context.Context, info *Info) (context.Context, error)

15
vendor/google.golang.org/grpc/trace.go generated vendored
View File

@ -31,7 +31,7 @@ import (
// EnableTracing controls whether to trace RPCs using the golang.org/x/net/trace package.
// This should only be set before any RPCs are sent or received by this program.
var EnableTracing = true
var EnableTracing bool
// methodFamily returns the trace family for the given method.
// It turns "/pkg.Service/GetFoo" into "pkg.Service".
@ -76,6 +76,15 @@ func (f *firstLine) String() string {
return line.String()
}
const truncateSize = 100
func truncate(x string, l int) string {
if l > len(x) {
return x
}
return x[:l]
}
// payload represents an RPC request or response payload.
type payload struct {
sent bool // whether this is an outgoing payload
@ -85,9 +94,9 @@ type payload struct {
func (p payload) String() string {
if p.sent {
return fmt.Sprintf("sent: %v", p.msg)
return truncate(fmt.Sprintf("sent: %v", p.msg), truncateSize)
}
return fmt.Sprintf("recv: %v", p.msg)
return truncate(fmt.Sprintf("recv: %v", p.msg), truncateSize)
}
type fmtStringer struct {

1369
vendor/google.golang.org/grpc/transport/http2_client.go generated vendored
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22
vendor/google.golang.org/grpc/version.go generated vendored Normal file
View File

@ -0,0 +1,22 @@
/*
*
* Copyright 2018 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package grpc
// Version is the current grpc version.
const Version = "1.14.0-dev"

89
vendor/google.golang.org/grpc/vet.sh generated vendored Executable file
View File

@ -0,0 +1,89 @@
#!/bin/bash
if [[ `uname -a` = *"Darwin"* ]]; then
echo "It seems you are running on Mac. This script does not work on Mac. See https://github.com/grpc/grpc-go/issues/2047"
exit 1
fi
set -ex # Exit on error; debugging enabled.
set -o pipefail # Fail a pipe if any sub-command fails.
die() {
echo "$@" >&2
exit 1
}
PATH="$GOPATH/bin:$GOROOT/bin:$PATH"
if [ "$1" = "-install" ]; then
go get -d \
google.golang.org/grpc/...
go get -u \
github.com/golang/lint/golint \
golang.org/x/tools/cmd/goimports \
honnef.co/go/tools/cmd/staticcheck \
github.com/client9/misspell/cmd/misspell \
github.com/golang/protobuf/protoc-gen-go
if [[ -z "$VET_SKIP_PROTO" ]]; then
if [[ "$TRAVIS" = "true" ]]; then
PROTOBUF_VERSION=3.3.0
PROTOC_FILENAME=protoc-${PROTOBUF_VERSION}-linux-x86_64.zip
pushd /home/travis
wget https://github.com/google/protobuf/releases/download/v${PROTOBUF_VERSION}/${PROTOC_FILENAME}
unzip ${PROTOC_FILENAME}
bin/protoc --version
popd
elif ! which protoc > /dev/null; then
die "Please install protoc into your path"
fi
fi
exit 0
elif [[ "$#" -ne 0 ]]; then
die "Unknown argument(s): $*"
fi
# TODO: Remove this check and the mangling below once "context" is imported
# directly.
if git status --porcelain | read; then
die "Uncommitted or untracked files found; commit changes first"
fi
git ls-files "*.go" | xargs grep -L "\(Copyright [0-9]\{4,\} gRPC authors\)\|DO NOT EDIT" 2>&1 | tee /dev/stderr | (! read)
git ls-files "*.go" | xargs grep -l '"unsafe"' 2>&1 | (! grep -v '_test.go') | tee /dev/stderr | (! read)
git ls-files "*.go" | xargs grep -l '"math/rand"' 2>&1 | (! grep -v '^examples\|^stress\|grpcrand') | tee /dev/stderr | (! read)
gofmt -s -d -l . 2>&1 | tee /dev/stderr | (! read)
goimports -l . 2>&1 | tee /dev/stderr | (! read)
golint ./... 2>&1 | (grep -vE "(_mock|\.pb)\.go:" || true) | tee /dev/stderr | (! read)
# Undo any edits made by this script.
cleanup() {
git reset --hard HEAD
}
trap cleanup EXIT
# Rewrite golang.org/x/net/context -> context imports (see grpc/grpc-go#1484).
# TODO: Remove this mangling once "context" is imported directly (grpc/grpc-go#711).
git ls-files "*.go" | xargs sed -i 's:"golang.org/x/net/context":"context":'
set +o pipefail
# TODO: Stop filtering pb.go files once golang/protobuf#214 is fixed.
go tool vet -all . 2>&1 | grep -vE '(clientconn|transport\/transport_test).go:.*cancel (function|var)' | grep -vF '.pb.go:' | tee /dev/stderr | (! read)
set -o pipefail
git reset --hard HEAD
if [[ -z "$VET_SKIP_PROTO" ]]; then
PATH="/home/travis/bin:$PATH" make proto && \
git status --porcelain 2>&1 | (! read) || \
(git status; git --no-pager diff; exit 1)
fi
# TODO(menghanl): fix errors in transport_test.
staticcheck -ignore '
google.golang.org/grpc/internal/transport/transport_test.go:SA2002
google.golang.org/grpc/benchmark/benchmain/main.go:SA1019
google.golang.org/grpc/stats/stats_test.go:SA1019
google.golang.org/grpc/test/end2end_test.go:SA1019
google.golang.org/grpc/balancer_test.go:SA1019
google.golang.org/grpc/balancer.go:SA1019
google.golang.org/grpc/clientconn_test.go:SA1019
' ./...
misspell -error .

162
vendor/vendor.json vendored
View File

@ -2973,28 +2973,58 @@
"revisionTime": "2017-07-31T18:20:57Z"
},
{
"checksumSHA1": "nwfmMh930HtXA7u5HYomxSR3Ixg=",
"checksumSHA1": "Sn2fr19yZE7k6G3ke/etP49E6Sc=",
"path": "google.golang.org/grpc",
"revision": "7657092a1303cc5a6fa3fee988d57c665683a4da",
"revisionTime": "2017-08-09T21:16:03Z"
"revision": "339b6cb107199486c3b352f70db9e977191be8b7",
"revisionTime": "2018-07-26T17:30:58Z"
},
{
"checksumSHA1": "/eTpFgjvMq5Bc9hYnw5fzKG4B6I=",
"checksumSHA1": "B+kZFVP8zRiQMpoEb39Mp2oSmqg=",
"path": "google.golang.org/grpc/balancer",
"revision": "339b6cb107199486c3b352f70db9e977191be8b7",
"revisionTime": "2018-07-26T17:30:58Z"
},
{
"checksumSHA1": "lw+L836hLeH8+//le+C+ycddCCU=",
"path": "google.golang.org/grpc/balancer/base",
"revision": "339b6cb107199486c3b352f70db9e977191be8b7",
"revisionTime": "2018-07-26T17:30:58Z"
},
{
"checksumSHA1": "DJ1AtOk4Pu7bqtUMob95Hw8HPNw=",
"path": "google.golang.org/grpc/balancer/roundrobin",
"revision": "339b6cb107199486c3b352f70db9e977191be8b7",
"revisionTime": "2018-07-26T17:30:58Z"
},
{
"checksumSHA1": "R3tuACGAPyK4lr+oSNt1saUzC0M=",
"path": "google.golang.org/grpc/codes",
"revision": "7657092a1303cc5a6fa3fee988d57c665683a4da",
"revisionTime": "2017-08-09T21:16:03Z"
"revision": "339b6cb107199486c3b352f70db9e977191be8b7",
"revisionTime": "2018-07-26T17:30:58Z"
},
{
"checksumSHA1": "XH2WYcDNwVO47zYShREJjcYXm0Y=",
"path": "google.golang.org/grpc/connectivity",
"revision": "7657092a1303cc5a6fa3fee988d57c665683a4da",
"revisionTime": "2017-08-09T21:16:03Z"
"revision": "339b6cb107199486c3b352f70db9e977191be8b7",
"revisionTime": "2018-07-26T17:30:58Z"
},
{
"checksumSHA1": "5ylThBvJnIcyWhL17AC9+Sdbw2E=",
"checksumSHA1": "wA6y5rkH1v4bWBe5M1r/Hdtgma4=",
"path": "google.golang.org/grpc/credentials",
"revision": "7657092a1303cc5a6fa3fee988d57c665683a4da",
"revisionTime": "2017-08-09T21:16:03Z"
"revision": "339b6cb107199486c3b352f70db9e977191be8b7",
"revisionTime": "2018-07-26T17:30:58Z"
},
{
"checksumSHA1": "cfLb+pzWB+Glwp82rgfcEST1mv8=",
"path": "google.golang.org/grpc/encoding",
"revision": "339b6cb107199486c3b352f70db9e977191be8b7",
"revisionTime": "2018-07-26T17:30:58Z"
},
{
"checksumSHA1": "LKKkn7EYA+Do9Qwb2/SUKLFNxoo=",
"path": "google.golang.org/grpc/encoding/proto",
"revision": "339b6cb107199486c3b352f70db9e977191be8b7",
"revisionTime": "2018-07-26T17:30:58Z"
},
{
"checksumSHA1": "2NbY9kmMweE4VUsruRsvmViVnNg=",
@ -3003,70 +3033,118 @@
"revisionTime": "2017-08-09T21:16:03Z"
},
{
"checksumSHA1": "ntHev01vgZgeIh5VFRmbLx/BSTo=",
"checksumSHA1": "ZPPSFisPDz2ANO4FBZIft+fRxyk=",
"path": "google.golang.org/grpc/grpclog",
"revision": "7657092a1303cc5a6fa3fee988d57c665683a4da",
"revisionTime": "2017-08-09T21:16:03Z"
"revision": "339b6cb107199486c3b352f70db9e977191be8b7",
"revisionTime": "2018-07-26T17:30:58Z"
},
{
"checksumSHA1": "pc9cweMiKQ5hVMuO9UoMGdbizaY=",
"checksumSHA1": "MRdkTRX18dr+tG+Q2s+BHox0T64=",
"path": "google.golang.org/grpc/health",
"revision": "7657092a1303cc5a6fa3fee988d57c665683a4da",
"revisionTime": "2017-08-09T21:16:03Z"
"revision": "339b6cb107199486c3b352f70db9e977191be8b7",
"revisionTime": "2018-07-26T17:30:58Z"
},
{
"checksumSHA1": "W5KfI1NIGJt7JaVnLzefDZr3+4s=",
"checksumSHA1": "aOU41miZwmHdMbzZNB4H2xz5wWI=",
"path": "google.golang.org/grpc/health/grpc_health_v1",
"revision": "7657092a1303cc5a6fa3fee988d57c665683a4da",
"revisionTime": "2017-08-09T21:16:03Z"
"revision": "339b6cb107199486c3b352f70db9e977191be8b7",
"revisionTime": "2018-07-26T17:30:58Z"
},
{
"checksumSHA1": "U9vDe05/tQrvFBojOQX8Xk12W9I=",
"checksumSHA1": "cSdzm5GhbalJbWUNrN8pRdW0uks=",
"path": "google.golang.org/grpc/internal",
"revision": "7657092a1303cc5a6fa3fee988d57c665683a4da",
"revisionTime": "2017-08-09T21:16:03Z"
"revision": "339b6cb107199486c3b352f70db9e977191be8b7",
"revisionTime": "2018-07-26T17:30:58Z"
},
{
"checksumSHA1": "uDJA7QK2iGnEwbd9TPqkLaM+xuU=",
"path": "google.golang.org/grpc/internal/backoff",
"revision": "339b6cb107199486c3b352f70db9e977191be8b7",
"revisionTime": "2018-07-26T17:30:58Z"
},
{
"checksumSHA1": "7FWQDRqF5ZhOBglkZgSxgsKzr/8=",
"path": "google.golang.org/grpc/internal/channelz",
"revision": "339b6cb107199486c3b352f70db9e977191be8b7",
"revisionTime": "2018-07-26T17:30:58Z"
},
{
"checksumSHA1": "5dFUCEaPjKwza9kwKqgljp8ckU4=",
"path": "google.golang.org/grpc/internal/envconfig",
"revision": "339b6cb107199486c3b352f70db9e977191be8b7",
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},
{
"checksumSHA1": "70gndc/uHwyAl3D45zqp7vyHWlo=",
"path": "google.golang.org/grpc/internal/grpcrand",
"revision": "339b6cb107199486c3b352f70db9e977191be8b7",
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},
{
"checksumSHA1": "F/QkfMhNApNewEK84d9CM3fT6js=",
"path": "google.golang.org/grpc/internal/transport",
"revision": "339b6cb107199486c3b352f70db9e977191be8b7",
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},
{
"checksumSHA1": "hcuHgKp8W0wIzoCnNfKI8NUss5o=",
"path": "google.golang.org/grpc/keepalive",
"revision": "7657092a1303cc5a6fa3fee988d57c665683a4da",
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},
{
"checksumSHA1": "N++Ur11m6Dq3j14/Hc2Kqmxroag=",
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"path": "google.golang.org/grpc/metadata",
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"revision": "339b6cb107199486c3b352f70db9e977191be8b7",
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