99 lines
2.6 KiB
Go
99 lines
2.6 KiB
Go
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/*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package endpoints
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import (
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"encoding/json"
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"fmt"
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"sync"
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"github.com/aliyun/alibaba-cloud-sdk-go/sdk/errors"
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"github.com/aliyun/alibaba-cloud-sdk-go/sdk/requests"
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"github.com/aliyun/alibaba-cloud-sdk-go/sdk/responses"
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"github.com/aliyun/alibaba-cloud-sdk-go/sdk/utils"
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)
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var debug utils.Debug
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func init() {
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debug = utils.Init("sdk")
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}
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const (
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ResolveEndpointUserGuideLink = ""
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)
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var once sync.Once
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var resolvers []Resolver
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type Resolver interface {
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TryResolve(param *ResolveParam) (endpoint string, support bool, err error)
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GetName() (name string)
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}
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// Resolve resolve endpoint with params
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// It will resolve with each supported resolver until anyone resolved
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func Resolve(param *ResolveParam) (endpoint string, err error) {
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supportedResolvers := getAllResolvers()
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var lastErr error
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for _, resolver := range supportedResolvers {
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endpoint, supported, resolveErr := resolver.TryResolve(param)
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if resolveErr != nil {
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lastErr = resolveErr
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}
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if supported {
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debug("resolve endpoint with %s\n", param)
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debug("\t%s by resolver(%s)\n", endpoint, resolver.GetName())
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return endpoint, nil
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}
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}
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// not support
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errorMsg := fmt.Sprintf(errors.CanNotResolveEndpointErrorMessage, param, ResolveEndpointUserGuideLink)
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err = errors.NewClientError(errors.CanNotResolveEndpointErrorCode, errorMsg, lastErr)
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return
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}
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func getAllResolvers() []Resolver {
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once.Do(func() {
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resolvers = []Resolver{
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&SimpleHostResolver{},
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&MappingResolver{},
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&LocationResolver{},
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&LocalRegionalResolver{},
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&LocalGlobalResolver{},
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}
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})
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return resolvers
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}
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type ResolveParam struct {
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Domain string
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Product string
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RegionId string
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LocationProduct string
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LocationEndpointType string
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CommonApi func(request *requests.CommonRequest) (response *responses.CommonResponse, err error) `json:"-"`
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}
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func (param *ResolveParam) String() string {
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jsonBytes, err := json.Marshal(param)
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if err != nil {
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return fmt.Sprint("ResolveParam.String() process error:", err)
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}
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return string(jsonBytes)
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}
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