vendor/google.golang.org/api/googleapi/transport/apikey.go

   1 // Copyright 2012 Google Inc. All rights reserved.
   2 // Use of this source code is governed by a BSD-style
   3 // license that can be found in the LICENSE file.
   4
   5 // Package transport contains HTTP transports used to make
   6 // authenticated API requests.
   7 package transport
   8
   9 import (
  10         "errors"
  11         "net/http"
  12 )
  13
  14 // APIKey is an HTTP Transport which wraps an underlying transport and
  15 // appends an API Key "key" parameter to the URL of outgoing requests.
  16 type APIKey struct {
  17         // Key is the API Key to set on requests.
  18         Key string
  19
  20         // Transport is the underlying HTTP transport.
  21         // If nil, http.DefaultTransport is used.
  22         Transport http.RoundTripper
  23 }
  24
  25 func (t *APIKey) RoundTrip(req *http.Request) (*http.Response, error) {
  26         rt := t.Transport
  27         if rt == nil {
  28                 rt = http.DefaultTransport
  29                 if rt == nil {
  30                         return nil, errors.New("googleapi/transport: no Transport specified or available")
  31                 }
  32         }
  33         newReq := *req
  34         args := newReq.URL.Query()
  35         args.Set("key", t.Key)
  36         newReq.URL.RawQuery = args.Encode()
  37         return rt.RoundTrip(&newReq)
  38 }