forked from lug/matterbridge
90 lines
2.3 KiB
Go
90 lines
2.3 KiB
Go
// Copyright 2014 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package oauth2
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import (
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"errors"
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"log"
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"net/http"
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"sync"
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)
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// Transport is an http.RoundTripper that makes OAuth 2.0 HTTP requests,
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// wrapping a base RoundTripper and adding an Authorization header
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// with a token from the supplied Sources.
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//
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// Transport is a low-level mechanism. Most code will use the
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// higher-level Config.Client method instead.
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type Transport struct {
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// Source supplies the token to add to outgoing requests'
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// Authorization headers.
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Source TokenSource
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// Base is the base RoundTripper used to make HTTP requests.
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// If nil, http.DefaultTransport is used.
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Base http.RoundTripper
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}
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// RoundTrip authorizes and authenticates the request with an
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// access token from Transport's Source.
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func (t *Transport) RoundTrip(req *http.Request) (*http.Response, error) {
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reqBodyClosed := false
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if req.Body != nil {
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defer func() {
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if !reqBodyClosed {
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req.Body.Close()
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}
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}()
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}
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if t.Source == nil {
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return nil, errors.New("oauth2: Transport's Source is nil")
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}
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token, err := t.Source.Token()
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if err != nil {
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return nil, err
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}
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req2 := cloneRequest(req) // per RoundTripper contract
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token.SetAuthHeader(req2)
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// req.Body is assumed to be closed by the base RoundTripper.
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reqBodyClosed = true
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return t.base().RoundTrip(req2)
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}
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var cancelOnce sync.Once
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// CancelRequest does nothing. It used to be a legacy cancellation mechanism
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// but now only it only logs on first use to warn that it's deprecated.
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//
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// Deprecated: use contexts for cancellation instead.
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func (t *Transport) CancelRequest(req *http.Request) {
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cancelOnce.Do(func() {
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log.Printf("deprecated: golang.org/x/oauth2: Transport.CancelRequest no longer does anything; use contexts")
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})
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}
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func (t *Transport) base() http.RoundTripper {
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if t.Base != nil {
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return t.Base
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}
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return http.DefaultTransport
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}
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// cloneRequest returns a clone of the provided *http.Request.
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// The clone is a shallow copy of the struct and its Header map.
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func cloneRequest(r *http.Request) *http.Request {
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// shallow copy of the struct
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r2 := new(http.Request)
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*r2 = *r
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// deep copy of the Header
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r2.Header = make(http.Header, len(r.Header))
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for k, s := range r.Header {
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r2.Header[k] = append([]string(nil), s...)
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}
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return r2
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}
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