mirror of
https://github.com/octoleo/restic.git
synced 2024-11-14 17:24:10 +00:00
113 lines
3.2 KiB
Go
113 lines
3.2 KiB
Go
// Copyright 2015 Google Inc. All Rights Reserved.
|
|
//
|
|
// 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/http supports network connections to HTTP servers.
|
|
// This package is not intended for use by end developers. Use the
|
|
// google.golang.org/api/option package to configure API clients.
|
|
package http
|
|
|
|
import (
|
|
"errors"
|
|
"net/http"
|
|
|
|
"golang.org/x/net/context"
|
|
"golang.org/x/oauth2"
|
|
"google.golang.org/api/googleapi/transport"
|
|
"google.golang.org/api/internal"
|
|
"google.golang.org/api/option"
|
|
)
|
|
|
|
// NewClient returns an HTTP client for use communicating with a Google cloud
|
|
// service, configured with the given ClientOptions. It also returns the endpoint
|
|
// for the service as specified in the options.
|
|
func NewClient(ctx context.Context, opts ...option.ClientOption) (*http.Client, string, error) {
|
|
var o internal.DialSettings
|
|
for _, opt := range opts {
|
|
opt.Apply(&o)
|
|
}
|
|
if err := o.Validate(); err != nil {
|
|
return nil, "", err
|
|
}
|
|
if o.GRPCConn != nil {
|
|
return nil, "", errors.New("unsupported gRPC connection specified")
|
|
}
|
|
// TODO(cbro): consider injecting the User-Agent even if an explicit HTTP client is provided?
|
|
if o.HTTPClient != nil {
|
|
return o.HTTPClient, o.Endpoint, nil
|
|
}
|
|
uat := userAgentTransport{
|
|
base: baseTransport(ctx),
|
|
userAgent: o.UserAgent,
|
|
}
|
|
var hc *http.Client
|
|
switch {
|
|
case o.NoAuth:
|
|
hc = &http.Client{Transport: uat}
|
|
case o.APIKey != "":
|
|
hc = &http.Client{
|
|
Transport: &transport.APIKey{
|
|
Key: o.APIKey,
|
|
Transport: uat,
|
|
},
|
|
}
|
|
default:
|
|
creds, err := internal.Creds(ctx, &o)
|
|
if err != nil {
|
|
return nil, "", err
|
|
}
|
|
hc = &http.Client{
|
|
Transport: &oauth2.Transport{
|
|
Source: creds.TokenSource,
|
|
Base: uat,
|
|
},
|
|
}
|
|
}
|
|
return hc, o.Endpoint, nil
|
|
}
|
|
|
|
type userAgentTransport struct {
|
|
userAgent string
|
|
base http.RoundTripper
|
|
}
|
|
|
|
func (t userAgentTransport) RoundTrip(req *http.Request) (*http.Response, error) {
|
|
rt := t.base
|
|
if rt == nil {
|
|
return nil, errors.New("transport: no Transport specified")
|
|
}
|
|
if t.userAgent == "" {
|
|
return rt.RoundTrip(req)
|
|
}
|
|
newReq := *req
|
|
newReq.Header = make(http.Header)
|
|
for k, vv := range req.Header {
|
|
newReq.Header[k] = vv
|
|
}
|
|
// TODO(cbro): append to existing User-Agent header?
|
|
newReq.Header["User-Agent"] = []string{t.userAgent}
|
|
return rt.RoundTrip(&newReq)
|
|
}
|
|
|
|
// Set at init time by dial_appengine.go. If nil, we're not on App Engine.
|
|
var appengineUrlfetchHook func(context.Context) http.RoundTripper
|
|
|
|
// baseTransport returns the base HTTP transport.
|
|
// On App Engine, this is urlfetch.Transport, otherwise it's http.DefaultTransport.
|
|
func baseTransport(ctx context.Context) http.RoundTripper {
|
|
if appengineUrlfetchHook != nil {
|
|
return appengineUrlfetchHook(ctx)
|
|
}
|
|
return http.DefaultTransport
|
|
}
|