43 lines
1.2 KiB
Go
43 lines
1.2 KiB
Go
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package rest
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import (
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"log"
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"net/http"
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)
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// DoerFunc satisfies Interface. DoerFuncs are useful for adding
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// logging/instrumentation to the http.Client that is used
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// within the rest.APIClient.
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type DoerFunc func(*http.Request) (*http.Response, error)
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// Do is implementation of rest.Doer interface. Calls itself on the
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// given http.Request.
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func (f DoerFunc) Do(r *http.Request) (*http.Response, error) {
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return f(r)
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}
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// A Decorator wraps a Doer with extra behavior, and doesnt
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// affect the behavior of other instances of the same type.
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type Decorator func(Doer) Doer
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// Decorate decorates a Doer c with all the given Decorators, in order.
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// Core object(Doer instance) that we want to apply layers(Decorator slice) to.
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func Decorate(d Doer, ds ...Decorator) Doer {
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decorated := d
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for _, decorate := range ds {
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decorated = decorate(decorated)
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}
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return decorated
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}
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// Logging returns a Decorator that logs a Doer's requests.
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// Dependency injection for the logger instance(inside the closures environment).
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func Logging(l *log.Logger) Decorator {
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return func(d Doer) Doer {
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return DoerFunc(func(r *http.Request) (*http.Response, error) {
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l.Printf("%s: %s %s", r.UserAgent(), r.Method, r.URL)
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return d.Do(r)
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})
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}
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}
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