Fix dependencies

This commit is contained in:
TwinProduction
2020-12-25 03:02:44 -05:00
parent 416178fb28
commit cf923af230
1170 changed files with 436047 additions and 0 deletions

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language: go
go:
- tip
install:
- export GOPATH="$HOME/gopath"
- mkdir -p "$GOPATH/src/golang.org/x"
- mv "$TRAVIS_BUILD_DIR" "$GOPATH/src/golang.org/x/oauth2"
- go get -v -t -d golang.org/x/oauth2/...
script:
- go test -v golang.org/x/oauth2/...

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# This source code refers to The Go Authors for copyright purposes.
# The master list of authors is in the main Go distribution,
# visible at http://tip.golang.org/AUTHORS.

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# Contributing to Go
Go is an open source project.
It is the work of hundreds of contributors. We appreciate your help!
## Filing issues
When [filing an issue](https://github.com/golang/oauth2/issues), make sure to answer these five questions:
1. What version of Go are you using (`go version`)?
2. What operating system and processor architecture are you using?
3. What did you do?
4. What did you expect to see?
5. What did you see instead?
General questions should go to the [golang-nuts mailing list](https://groups.google.com/group/golang-nuts) instead of the issue tracker.
The gophers there will answer or ask you to file an issue if you've tripped over a bug.
## Contributing code
Please read the [Contribution Guidelines](https://golang.org/doc/contribute.html)
before sending patches.
Unless otherwise noted, the Go source files are distributed under
the BSD-style license found in the LICENSE file.

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# This source code was written by the Go contributors.
# The master list of contributors is in the main Go distribution,
# visible at http://tip.golang.org/CONTRIBUTORS.

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Copyright (c) 2009 The Go Authors. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following disclaimer
in the documentation and/or other materials provided with the
distribution.
* Neither the name of Google Inc. nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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# OAuth2 for Go
[![Go Reference](https://pkg.go.dev/badge/golang.org/x/oauth2.svg)](https://pkg.go.dev/golang.org/x/oauth2)
[![Build Status](https://travis-ci.org/golang/oauth2.svg?branch=master)](https://travis-ci.org/golang/oauth2)
oauth2 package contains a client implementation for OAuth 2.0 spec.
## Installation
~~~~
go get golang.org/x/oauth2
~~~~
Or you can manually git clone the repository to
`$(go env GOPATH)/src/golang.org/x/oauth2`.
See pkg.go.dev for further documentation and examples.
* [pkg.go.dev/golang.org/x/oauth2](https://pkg.go.dev/golang.org/x/oauth2)
* [pkg.go.dev/golang.org/x/oauth2/google](https://pkg.go.dev/golang.org/x/oauth2/google)
## Policy for new packages
We no longer accept new provider-specific packages in this repo if all
they do is add a single endpoint variable. If you just want to add a
single endpoint, add it to the
[pkg.go.dev/golang.org/x/oauth2/endpoints](https://pkg.go.dev/golang.org/x/oauth2/endpoints)
package.
## Report Issues / Send Patches
This repository uses Gerrit for code changes. To learn how to submit changes to
this repository, see https://golang.org/doc/contribute.html.
The main issue tracker for the oauth2 repository is located at
https://github.com/golang/oauth2/issues.

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module golang.org/x/oauth2
go 1.11
require (
cloud.google.com/go v0.65.0
golang.org/x/net v0.0.0-20200822124328-c89045814202
google.golang.org/appengine v1.6.6
)

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github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
github.com/prometheus/client_model v0.0.0-20190812154241-14fe0d1b01d4/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA=
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github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
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golang.org/x/net v0.0.0-20200222125558-5a598a2470a0/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
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golang.org/x/net v0.0.0-20200301022130-244492dfa37a/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/net v0.0.0-20200324143707-d3edc9973b7e/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
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golang.org/x/net v0.0.0-20200520182314-0ba52f642ac2/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
golang.org/x/net v0.0.0-20200625001655-4c5254603344/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
golang.org/x/net v0.0.0-20200707034311-ab3426394381/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
golang.org/x/net v0.0.0-20200822124328-c89045814202 h1:VvcQYSHwXgi7W+TpUR6A9g6Up98WAHf3f/ulnJ62IyA=
golang.org/x/net v0.0.0-20200822124328-c89045814202/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
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google.golang.org/protobuf v1.23.1-0.20200526195155-81db48ad09cc/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
google.golang.org/protobuf v1.24.0/go.mod h1:r/3tXBNzIEhYS9I1OUVjXDlt8tc493IdKGjtUeSXeh4=
google.golang.org/protobuf v1.25.0 h1:Ejskq+SyPohKW+1uil0JJMtmHCgJPJ/qWTxr8qp+R4c=
google.golang.org/protobuf v1.25.0/go.mod h1:9JNX74DMeImyA3h4bdi1ymwjUzf21/xIlbajtzgsN7c=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
honnef.co/go/tools v0.0.0-20190418001031-e561f6794a2a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
honnef.co/go/tools v0.0.1-2020.1.3/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
honnef.co/go/tools v0.0.1-2020.1.4/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
rsc.io/quote/v3 v3.1.0/go.mod h1:yEA65RcK8LyAZtP9Kv3t0HmxON59tX3rD+tICJqUlj0=
rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=

38
vendor/golang.org/x/oauth2/google/appengine.go generated vendored Normal file
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// Copyright 2014 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package google
import (
"context"
"time"
"golang.org/x/oauth2"
)
// Set at init time by appengine_gen1.go. If nil, we're not on App Engine standard first generation (<= Go 1.9) or App Engine flexible.
var appengineTokenFunc func(c context.Context, scopes ...string) (token string, expiry time.Time, err error)
// Set at init time by appengine_gen1.go. If nil, we're not on App Engine standard first generation (<= Go 1.9) or App Engine flexible.
var appengineAppIDFunc func(c context.Context) string
// AppEngineTokenSource returns a token source that fetches tokens from either
// the current application's service account or from the metadata server,
// depending on the App Engine environment. See below for environment-specific
// details. If you are implementing a 3-legged OAuth 2.0 flow on App Engine that
// involves user accounts, see oauth2.Config instead.
//
// First generation App Engine runtimes (<= Go 1.9):
// AppEngineTokenSource returns a token source that fetches tokens issued to the
// current App Engine application's service account. The provided context must have
// come from appengine.NewContext.
//
// Second generation App Engine runtimes (>= Go 1.11) and App Engine flexible:
// AppEngineTokenSource is DEPRECATED on second generation runtimes and on the
// flexible environment. It delegates to ComputeTokenSource, and the provided
// context and scopes are not used. Please use DefaultTokenSource (or ComputeTokenSource,
// which DefaultTokenSource will use in this case) instead.
func AppEngineTokenSource(ctx context.Context, scope ...string) oauth2.TokenSource {
return appEngineTokenSource(ctx, scope...)
}

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// Copyright 2018 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build appengine
// This file applies to App Engine first generation runtimes (<= Go 1.9).
package google
import (
"context"
"sort"
"strings"
"sync"
"golang.org/x/oauth2"
"google.golang.org/appengine"
)
func init() {
appengineTokenFunc = appengine.AccessToken
appengineAppIDFunc = appengine.AppID
}
// See comment on AppEngineTokenSource in appengine.go.
func appEngineTokenSource(ctx context.Context, scope ...string) oauth2.TokenSource {
scopes := append([]string{}, scope...)
sort.Strings(scopes)
return &gaeTokenSource{
ctx: ctx,
scopes: scopes,
key: strings.Join(scopes, " "),
}
}
// aeTokens helps the fetched tokens to be reused until their expiration.
var (
aeTokensMu sync.Mutex
aeTokens = make(map[string]*tokenLock) // key is space-separated scopes
)
type tokenLock struct {
mu sync.Mutex // guards t; held while fetching or updating t
t *oauth2.Token
}
type gaeTokenSource struct {
ctx context.Context
scopes []string
key string // to aeTokens map; space-separated scopes
}
func (ts *gaeTokenSource) Token() (*oauth2.Token, error) {
aeTokensMu.Lock()
tok, ok := aeTokens[ts.key]
if !ok {
tok = &tokenLock{}
aeTokens[ts.key] = tok
}
aeTokensMu.Unlock()
tok.mu.Lock()
defer tok.mu.Unlock()
if tok.t.Valid() {
return tok.t, nil
}
access, exp, err := appengineTokenFunc(ts.ctx, ts.scopes...)
if err != nil {
return nil, err
}
tok.t = &oauth2.Token{
AccessToken: access,
Expiry: exp,
}
return tok.t, nil
}

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// Copyright 2018 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build !appengine
// This file applies to App Engine second generation runtimes (>= Go 1.11) and App Engine flexible.
package google
import (
"context"
"log"
"sync"
"golang.org/x/oauth2"
)
var logOnce sync.Once // only spam about deprecation once
// See comment on AppEngineTokenSource in appengine.go.
func appEngineTokenSource(ctx context.Context, scope ...string) oauth2.TokenSource {
logOnce.Do(func() {
log.Print("google: AppEngineTokenSource is deprecated on App Engine standard second generation runtimes (>= Go 1.11) and App Engine flexible. Please use DefaultTokenSource or ComputeTokenSource.")
})
return ComputeTokenSource("")
}

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// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package google
import (
"context"
"encoding/json"
"fmt"
"io/ioutil"
"net/http"
"os"
"path/filepath"
"runtime"
"cloud.google.com/go/compute/metadata"
"golang.org/x/oauth2"
)
// Credentials holds Google credentials, including "Application Default Credentials".
// For more details, see:
// https://developers.google.com/accounts/docs/application-default-credentials
type Credentials struct {
ProjectID string // may be empty
TokenSource oauth2.TokenSource
// JSON contains the raw bytes from a JSON credentials file.
// This field may be nil if authentication is provided by the
// environment and not with a credentials file, e.g. when code is
// running on Google Cloud Platform.
JSON []byte
}
// DefaultCredentials is the old name of Credentials.
//
// Deprecated: use Credentials instead.
type DefaultCredentials = Credentials
// DefaultClient returns an HTTP Client that uses the
// DefaultTokenSource to obtain authentication credentials.
func DefaultClient(ctx context.Context, scope ...string) (*http.Client, error) {
ts, err := DefaultTokenSource(ctx, scope...)
if err != nil {
return nil, err
}
return oauth2.NewClient(ctx, ts), nil
}
// DefaultTokenSource returns the token source for
// "Application Default Credentials".
// It is a shortcut for FindDefaultCredentials(ctx, scope).TokenSource.
func DefaultTokenSource(ctx context.Context, scope ...string) (oauth2.TokenSource, error) {
creds, err := FindDefaultCredentials(ctx, scope...)
if err != nil {
return nil, err
}
return creds.TokenSource, nil
}
// FindDefaultCredentials searches for "Application Default Credentials".
//
// It looks for credentials in the following places,
// preferring the first location found:
//
// 1. A JSON file whose path is specified by the
// GOOGLE_APPLICATION_CREDENTIALS environment variable.
// 2. A JSON file in a location known to the gcloud command-line tool.
// On Windows, this is %APPDATA%/gcloud/application_default_credentials.json.
// On other systems, $HOME/.config/gcloud/application_default_credentials.json.
// 3. On Google App Engine standard first generation runtimes (<= Go 1.9) it uses
// the appengine.AccessToken function.
// 4. On Google Compute Engine, Google App Engine standard second generation runtimes
// (>= Go 1.11), and Google App Engine flexible environment, it fetches
// credentials from the metadata server.
func FindDefaultCredentials(ctx context.Context, scopes ...string) (*Credentials, error) {
// First, try the environment variable.
const envVar = "GOOGLE_APPLICATION_CREDENTIALS"
if filename := os.Getenv(envVar); filename != "" {
creds, err := readCredentialsFile(ctx, filename, scopes)
if err != nil {
return nil, fmt.Errorf("google: error getting credentials using %v environment variable: %v", envVar, err)
}
return creds, nil
}
// Second, try a well-known file.
filename := wellKnownFile()
if creds, err := readCredentialsFile(ctx, filename, scopes); err == nil {
return creds, nil
} else if !os.IsNotExist(err) {
return nil, fmt.Errorf("google: error getting credentials using well-known file (%v): %v", filename, err)
}
// Third, if we're on a Google App Engine standard first generation runtime (<= Go 1.9)
// use those credentials. App Engine standard second generation runtimes (>= Go 1.11)
// and App Engine flexible use ComputeTokenSource and the metadata server.
if appengineTokenFunc != nil {
return &DefaultCredentials{
ProjectID: appengineAppIDFunc(ctx),
TokenSource: AppEngineTokenSource(ctx, scopes...),
}, nil
}
// Fourth, if we're on Google Compute Engine, an App Engine standard second generation runtime,
// or App Engine flexible, use the metadata server.
if metadata.OnGCE() {
id, _ := metadata.ProjectID()
return &DefaultCredentials{
ProjectID: id,
TokenSource: ComputeTokenSource("", scopes...),
}, nil
}
// None are found; return helpful error.
const url = "https://developers.google.com/accounts/docs/application-default-credentials"
return nil, fmt.Errorf("google: could not find default credentials. See %v for more information.", url)
}
// CredentialsFromJSON obtains Google credentials from a JSON value. The JSON can
// represent either a Google Developers Console client_credentials.json file (as in
// ConfigFromJSON) or a Google Developers service account key file (as in
// JWTConfigFromJSON).
func CredentialsFromJSON(ctx context.Context, jsonData []byte, scopes ...string) (*Credentials, error) {
var f credentialsFile
if err := json.Unmarshal(jsonData, &f); err != nil {
return nil, err
}
ts, err := f.tokenSource(ctx, append([]string(nil), scopes...))
if err != nil {
return nil, err
}
return &DefaultCredentials{
ProjectID: f.ProjectID,
TokenSource: ts,
JSON: jsonData,
}, nil
}
func wellKnownFile() string {
const f = "application_default_credentials.json"
if runtime.GOOS == "windows" {
return filepath.Join(os.Getenv("APPDATA"), "gcloud", f)
}
return filepath.Join(guessUnixHomeDir(), ".config", "gcloud", f)
}
func readCredentialsFile(ctx context.Context, filename string, scopes []string) (*DefaultCredentials, error) {
b, err := ioutil.ReadFile(filename)
if err != nil {
return nil, err
}
return CredentialsFromJSON(ctx, b, scopes...)
}

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// Copyright 2018 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Package google provides support for making OAuth2 authorized and authenticated
// HTTP requests to Google APIs. It supports the Web server flow, client-side
// credentials, service accounts, Google Compute Engine service accounts, and Google
// App Engine service accounts.
//
// A brief overview of the package follows. For more information, please read
// https://developers.google.com/accounts/docs/OAuth2
// and
// https://developers.google.com/accounts/docs/application-default-credentials.
//
// OAuth2 Configs
//
// Two functions in this package return golang.org/x/oauth2.Config values from Google credential
// data. Google supports two JSON formats for OAuth2 credentials: one is handled by ConfigFromJSON,
// the other by JWTConfigFromJSON. The returned Config can be used to obtain a TokenSource or
// create an http.Client.
//
//
// Credentials
//
// The Credentials type represents Google credentials, including Application Default
// Credentials.
//
// Use FindDefaultCredentials to obtain Application Default Credentials.
// FindDefaultCredentials looks in some well-known places for a credentials file, and
// will call AppEngineTokenSource or ComputeTokenSource as needed.
//
// DefaultClient and DefaultTokenSource are convenience methods. They first call FindDefaultCredentials,
// then use the credentials to construct an http.Client or an oauth2.TokenSource.
//
// Use CredentialsFromJSON to obtain credentials from either of the two JSON formats
// described in OAuth2 Configs, above. The TokenSource in the returned value is the
// same as the one obtained from the oauth2.Config returned from ConfigFromJSON or
// JWTConfigFromJSON, but the Credentials may contain additional information
// that is useful is some circumstances.
package google // import "golang.org/x/oauth2/google"

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// Copyright 2014 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package google
import (
"context"
"encoding/json"
"errors"
"fmt"
"net/url"
"strings"
"time"
"cloud.google.com/go/compute/metadata"
"golang.org/x/oauth2"
"golang.org/x/oauth2/jwt"
)
// Endpoint is Google's OAuth 2.0 endpoint.
var Endpoint = oauth2.Endpoint{
AuthURL: "https://accounts.google.com/o/oauth2/auth",
TokenURL: "https://oauth2.googleapis.com/token",
AuthStyle: oauth2.AuthStyleInParams,
}
// JWTTokenURL is Google's OAuth 2.0 token URL to use with the JWT flow.
const JWTTokenURL = "https://oauth2.googleapis.com/token"
// ConfigFromJSON uses a Google Developers Console client_credentials.json
// file to construct a config.
// client_credentials.json can be downloaded from
// https://console.developers.google.com, under "Credentials". Download the Web
// application credentials in the JSON format and provide the contents of the
// file as jsonKey.
func ConfigFromJSON(jsonKey []byte, scope ...string) (*oauth2.Config, error) {
type cred struct {
ClientID string `json:"client_id"`
ClientSecret string `json:"client_secret"`
RedirectURIs []string `json:"redirect_uris"`
AuthURI string `json:"auth_uri"`
TokenURI string `json:"token_uri"`
}
var j struct {
Web *cred `json:"web"`
Installed *cred `json:"installed"`
}
if err := json.Unmarshal(jsonKey, &j); err != nil {
return nil, err
}
var c *cred
switch {
case j.Web != nil:
c = j.Web
case j.Installed != nil:
c = j.Installed
default:
return nil, fmt.Errorf("oauth2/google: no credentials found")
}
if len(c.RedirectURIs) < 1 {
return nil, errors.New("oauth2/google: missing redirect URL in the client_credentials.json")
}
return &oauth2.Config{
ClientID: c.ClientID,
ClientSecret: c.ClientSecret,
RedirectURL: c.RedirectURIs[0],
Scopes: scope,
Endpoint: oauth2.Endpoint{
AuthURL: c.AuthURI,
TokenURL: c.TokenURI,
},
}, nil
}
// JWTConfigFromJSON uses a Google Developers service account JSON key file to read
// the credentials that authorize and authenticate the requests.
// Create a service account on "Credentials" for your project at
// https://console.developers.google.com to download a JSON key file.
func JWTConfigFromJSON(jsonKey []byte, scope ...string) (*jwt.Config, error) {
var f credentialsFile
if err := json.Unmarshal(jsonKey, &f); err != nil {
return nil, err
}
if f.Type != serviceAccountKey {
return nil, fmt.Errorf("google: read JWT from JSON credentials: 'type' field is %q (expected %q)", f.Type, serviceAccountKey)
}
scope = append([]string(nil), scope...) // copy
return f.jwtConfig(scope), nil
}
// JSON key file types.
const (
serviceAccountKey = "service_account"
userCredentialsKey = "authorized_user"
)
// credentialsFile is the unmarshalled representation of a credentials file.
type credentialsFile struct {
Type string `json:"type"` // serviceAccountKey or userCredentialsKey
// Service Account fields
ClientEmail string `json:"client_email"`
PrivateKeyID string `json:"private_key_id"`
PrivateKey string `json:"private_key"`
TokenURL string `json:"token_uri"`
ProjectID string `json:"project_id"`
// User Credential fields
// (These typically come from gcloud auth.)
ClientSecret string `json:"client_secret"`
ClientID string `json:"client_id"`
RefreshToken string `json:"refresh_token"`
}
func (f *credentialsFile) jwtConfig(scopes []string) *jwt.Config {
cfg := &jwt.Config{
Email: f.ClientEmail,
PrivateKey: []byte(f.PrivateKey),
PrivateKeyID: f.PrivateKeyID,
Scopes: scopes,
TokenURL: f.TokenURL,
}
if cfg.TokenURL == "" {
cfg.TokenURL = JWTTokenURL
}
return cfg
}
func (f *credentialsFile) tokenSource(ctx context.Context, scopes []string) (oauth2.TokenSource, error) {
switch f.Type {
case serviceAccountKey:
cfg := f.jwtConfig(scopes)
return cfg.TokenSource(ctx), nil
case userCredentialsKey:
cfg := &oauth2.Config{
ClientID: f.ClientID,
ClientSecret: f.ClientSecret,
Scopes: scopes,
Endpoint: Endpoint,
}
tok := &oauth2.Token{RefreshToken: f.RefreshToken}
return cfg.TokenSource(ctx, tok), nil
case "":
return nil, errors.New("missing 'type' field in credentials")
default:
return nil, fmt.Errorf("unknown credential type: %q", f.Type)
}
}
// ComputeTokenSource returns a token source that fetches access tokens
// from Google Compute Engine (GCE)'s metadata server. It's only valid to use
// this token source if your program is running on a GCE instance.
// If no account is specified, "default" is used.
// If no scopes are specified, a set of default scopes are automatically granted.
// Further information about retrieving access tokens from the GCE metadata
// server can be found at https://cloud.google.com/compute/docs/authentication.
func ComputeTokenSource(account string, scope ...string) oauth2.TokenSource {
return oauth2.ReuseTokenSource(nil, computeSource{account: account, scopes: scope})
}
type computeSource struct {
account string
scopes []string
}
func (cs computeSource) Token() (*oauth2.Token, error) {
if !metadata.OnGCE() {
return nil, errors.New("oauth2/google: can't get a token from the metadata service; not running on GCE")
}
acct := cs.account
if acct == "" {
acct = "default"
}
tokenURI := "instance/service-accounts/" + acct + "/token"
if len(cs.scopes) > 0 {
v := url.Values{}
v.Set("scopes", strings.Join(cs.scopes, ","))
tokenURI = tokenURI + "?" + v.Encode()
}
tokenJSON, err := metadata.Get(tokenURI)
if err != nil {
return nil, err
}
var res struct {
AccessToken string `json:"access_token"`
ExpiresInSec int `json:"expires_in"`
TokenType string `json:"token_type"`
}
err = json.NewDecoder(strings.NewReader(tokenJSON)).Decode(&res)
if err != nil {
return nil, fmt.Errorf("oauth2/google: invalid token JSON from metadata: %v", err)
}
if res.ExpiresInSec == 0 || res.AccessToken == "" {
return nil, fmt.Errorf("oauth2/google: incomplete token received from metadata")
}
tok := &oauth2.Token{
AccessToken: res.AccessToken,
TokenType: res.TokenType,
Expiry: time.Now().Add(time.Duration(res.ExpiresInSec) * time.Second),
}
// NOTE(cbro): add hidden metadata about where the token is from.
// This is needed for detection by client libraries to know that credentials come from the metadata server.
// This may be removed in a future version of this library.
return tok.WithExtra(map[string]interface{}{
"oauth2.google.tokenSource": "compute-metadata",
"oauth2.google.serviceAccount": acct,
}), nil
}

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// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package google
import (
"crypto/rsa"
"fmt"
"time"
"golang.org/x/oauth2"
"golang.org/x/oauth2/internal"
"golang.org/x/oauth2/jws"
)
// JWTAccessTokenSourceFromJSON uses a Google Developers service account JSON
// key file to read the credentials that authorize and authenticate the
// requests, and returns a TokenSource that does not use any OAuth2 flow but
// instead creates a JWT and sends that as the access token.
// The audience is typically a URL that specifies the scope of the credentials.
//
// Note that this is not a standard OAuth flow, but rather an
// optimization supported by a few Google services.
// Unless you know otherwise, you should use JWTConfigFromJSON instead.
func JWTAccessTokenSourceFromJSON(jsonKey []byte, audience string) (oauth2.TokenSource, error) {
cfg, err := JWTConfigFromJSON(jsonKey)
if err != nil {
return nil, fmt.Errorf("google: could not parse JSON key: %v", err)
}
pk, err := internal.ParseKey(cfg.PrivateKey)
if err != nil {
return nil, fmt.Errorf("google: could not parse key: %v", err)
}
ts := &jwtAccessTokenSource{
email: cfg.Email,
audience: audience,
pk: pk,
pkID: cfg.PrivateKeyID,
}
tok, err := ts.Token()
if err != nil {
return nil, err
}
return oauth2.ReuseTokenSource(tok, ts), nil
}
type jwtAccessTokenSource struct {
email, audience string
pk *rsa.PrivateKey
pkID string
}
func (ts *jwtAccessTokenSource) Token() (*oauth2.Token, error) {
iat := time.Now()
exp := iat.Add(time.Hour)
cs := &jws.ClaimSet{
Iss: ts.email,
Sub: ts.email,
Aud: ts.audience,
Iat: iat.Unix(),
Exp: exp.Unix(),
}
hdr := &jws.Header{
Algorithm: "RS256",
Typ: "JWT",
KeyID: string(ts.pkID),
}
msg, err := jws.Encode(hdr, cs, ts.pk)
if err != nil {
return nil, fmt.Errorf("google: could not encode JWT: %v", err)
}
return &oauth2.Token{AccessToken: msg, TokenType: "Bearer", Expiry: exp}, nil
}

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// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package google
import (
"bufio"
"context"
"encoding/json"
"errors"
"fmt"
"io"
"net/http"
"os"
"os/user"
"path/filepath"
"runtime"
"strings"
"time"
"golang.org/x/oauth2"
)
type sdkCredentials struct {
Data []struct {
Credential struct {
ClientID string `json:"client_id"`
ClientSecret string `json:"client_secret"`
AccessToken string `json:"access_token"`
RefreshToken string `json:"refresh_token"`
TokenExpiry *time.Time `json:"token_expiry"`
} `json:"credential"`
Key struct {
Account string `json:"account"`
Scope string `json:"scope"`
} `json:"key"`
}
}
// An SDKConfig provides access to tokens from an account already
// authorized via the Google Cloud SDK.
type SDKConfig struct {
conf oauth2.Config
initialToken *oauth2.Token
}
// NewSDKConfig creates an SDKConfig for the given Google Cloud SDK
// account. If account is empty, the account currently active in
// Google Cloud SDK properties is used.
// Google Cloud SDK credentials must be created by running `gcloud auth`
// before using this function.
// The Google Cloud SDK is available at https://cloud.google.com/sdk/.
func NewSDKConfig(account string) (*SDKConfig, error) {
configPath, err := sdkConfigPath()
if err != nil {
return nil, fmt.Errorf("oauth2/google: error getting SDK config path: %v", err)
}
credentialsPath := filepath.Join(configPath, "credentials")
f, err := os.Open(credentialsPath)
if err != nil {
return nil, fmt.Errorf("oauth2/google: failed to load SDK credentials: %v", err)
}
defer f.Close()
var c sdkCredentials
if err := json.NewDecoder(f).Decode(&c); err != nil {
return nil, fmt.Errorf("oauth2/google: failed to decode SDK credentials from %q: %v", credentialsPath, err)
}
if len(c.Data) == 0 {
return nil, fmt.Errorf("oauth2/google: no credentials found in %q, run `gcloud auth login` to create one", credentialsPath)
}
if account == "" {
propertiesPath := filepath.Join(configPath, "properties")
f, err := os.Open(propertiesPath)
if err != nil {
return nil, fmt.Errorf("oauth2/google: failed to load SDK properties: %v", err)
}
defer f.Close()
ini, err := parseINI(f)
if err != nil {
return nil, fmt.Errorf("oauth2/google: failed to parse SDK properties %q: %v", propertiesPath, err)
}
core, ok := ini["core"]
if !ok {
return nil, fmt.Errorf("oauth2/google: failed to find [core] section in %v", ini)
}
active, ok := core["account"]
if !ok {
return nil, fmt.Errorf("oauth2/google: failed to find %q attribute in %v", "account", core)
}
account = active
}
for _, d := range c.Data {
if account == "" || d.Key.Account == account {
if d.Credential.AccessToken == "" && d.Credential.RefreshToken == "" {
return nil, fmt.Errorf("oauth2/google: no token available for account %q", account)
}
var expiry time.Time
if d.Credential.TokenExpiry != nil {
expiry = *d.Credential.TokenExpiry
}
return &SDKConfig{
conf: oauth2.Config{
ClientID: d.Credential.ClientID,
ClientSecret: d.Credential.ClientSecret,
Scopes: strings.Split(d.Key.Scope, " "),
Endpoint: Endpoint,
RedirectURL: "oob",
},
initialToken: &oauth2.Token{
AccessToken: d.Credential.AccessToken,
RefreshToken: d.Credential.RefreshToken,
Expiry: expiry,
},
}, nil
}
}
return nil, fmt.Errorf("oauth2/google: no such credentials for account %q", account)
}
// Client returns an HTTP client using Google Cloud SDK credentials to
// authorize requests. The token will auto-refresh as necessary. The
// underlying http.RoundTripper will be obtained using the provided
// context. The returned client and its Transport should not be
// modified.
func (c *SDKConfig) Client(ctx context.Context) *http.Client {
return &http.Client{
Transport: &oauth2.Transport{
Source: c.TokenSource(ctx),
},
}
}
// TokenSource returns an oauth2.TokenSource that retrieve tokens from
// Google Cloud SDK credentials using the provided context.
// It will returns the current access token stored in the credentials,
// and refresh it when it expires, but it won't update the credentials
// with the new access token.
func (c *SDKConfig) TokenSource(ctx context.Context) oauth2.TokenSource {
return c.conf.TokenSource(ctx, c.initialToken)
}
// Scopes are the OAuth 2.0 scopes the current account is authorized for.
func (c *SDKConfig) Scopes() []string {
return c.conf.Scopes
}
func parseINI(ini io.Reader) (map[string]map[string]string, error) {
result := map[string]map[string]string{
"": {}, // root section
}
scanner := bufio.NewScanner(ini)
currentSection := ""
for scanner.Scan() {
line := strings.TrimSpace(scanner.Text())
if strings.HasPrefix(line, ";") {
// comment.
continue
}
if strings.HasPrefix(line, "[") && strings.HasSuffix(line, "]") {
currentSection = strings.TrimSpace(line[1 : len(line)-1])
result[currentSection] = map[string]string{}
continue
}
parts := strings.SplitN(line, "=", 2)
if len(parts) == 2 && parts[0] != "" {
result[currentSection][strings.TrimSpace(parts[0])] = strings.TrimSpace(parts[1])
}
}
if err := scanner.Err(); err != nil {
return nil, fmt.Errorf("error scanning ini: %v", err)
}
return result, nil
}
// sdkConfigPath tries to guess where the gcloud config is located.
// It can be overridden during tests.
var sdkConfigPath = func() (string, error) {
if runtime.GOOS == "windows" {
return filepath.Join(os.Getenv("APPDATA"), "gcloud"), nil
}
homeDir := guessUnixHomeDir()
if homeDir == "" {
return "", errors.New("unable to get current user home directory: os/user lookup failed; $HOME is empty")
}
return filepath.Join(homeDir, ".config", "gcloud"), nil
}
func guessUnixHomeDir() string {
// Prefer $HOME over user.Current due to glibc bug: golang.org/issue/13470
if v := os.Getenv("HOME"); v != "" {
return v
}
// Else, fall back to user.Current:
if u, err := user.Current(); err == nil {
return u.HomeDir
}
return ""
}

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// Copyright 2018 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build appengine
package internal
import "google.golang.org/appengine/urlfetch"
func init() {
appengineClientHook = urlfetch.Client
}

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// Copyright 2017 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Package internal contains support packages for oauth2 package.
package internal

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// Copyright 2014 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package internal
import (
"crypto/rsa"
"crypto/x509"
"encoding/pem"
"errors"
"fmt"
)
// ParseKey converts the binary contents of a private key file
// to an *rsa.PrivateKey. It detects whether the private key is in a
// PEM container or not. If so, it extracts the the private key
// from PEM container before conversion. It only supports PEM
// containers with no passphrase.
func ParseKey(key []byte) (*rsa.PrivateKey, error) {
block, _ := pem.Decode(key)
if block != nil {
key = block.Bytes
}
parsedKey, err := x509.ParsePKCS8PrivateKey(key)
if err != nil {
parsedKey, err = x509.ParsePKCS1PrivateKey(key)
if err != nil {
return nil, fmt.Errorf("private key should be a PEM or plain PKCS1 or PKCS8; parse error: %v", err)
}
}
parsed, ok := parsedKey.(*rsa.PrivateKey)
if !ok {
return nil, errors.New("private key is invalid")
}
return parsed, nil
}

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// Copyright 2014 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package internal
import (
"context"
"encoding/json"
"errors"
"fmt"
"io"
"io/ioutil"
"math"
"mime"
"net/http"
"net/url"
"strconv"
"strings"
"sync"
"time"
"golang.org/x/net/context/ctxhttp"
)
// Token represents the credentials used to authorize
// the requests to access protected resources on the OAuth 2.0
// provider's backend.
//
// This type is a mirror of oauth2.Token and exists to break
// an otherwise-circular dependency. Other internal packages
// should convert this Token into an oauth2.Token before use.
type Token struct {
// AccessToken is the token that authorizes and authenticates
// the requests.
AccessToken string
// TokenType is the type of token.
// The Type method returns either this or "Bearer", the default.
TokenType string
// RefreshToken is a token that's used by the application
// (as opposed to the user) to refresh the access token
// if it expires.
RefreshToken string
// Expiry is the optional expiration time of the access token.
//
// If zero, TokenSource implementations will reuse the same
// token forever and RefreshToken or equivalent
// mechanisms for that TokenSource will not be used.
Expiry time.Time
// Raw optionally contains extra metadata from the server
// when updating a token.
Raw interface{}
}
// tokenJSON is the struct representing the HTTP response from OAuth2
// providers returning a token in JSON form.
type tokenJSON struct {
AccessToken string `json:"access_token"`
TokenType string `json:"token_type"`
RefreshToken string `json:"refresh_token"`
ExpiresIn expirationTime `json:"expires_in"` // at least PayPal returns string, while most return number
}
func (e *tokenJSON) expiry() (t time.Time) {
if v := e.ExpiresIn; v != 0 {
return time.Now().Add(time.Duration(v) * time.Second)
}
return
}
type expirationTime int32
func (e *expirationTime) UnmarshalJSON(b []byte) error {
if len(b) == 0 || string(b) == "null" {
return nil
}
var n json.Number
err := json.Unmarshal(b, &n)
if err != nil {
return err
}
i, err := n.Int64()
if err != nil {
return err
}
if i > math.MaxInt32 {
i = math.MaxInt32
}
*e = expirationTime(i)
return nil
}
// RegisterBrokenAuthHeaderProvider previously did something. It is now a no-op.
//
// Deprecated: this function no longer does anything. Caller code that
// wants to avoid potential extra HTTP requests made during
// auto-probing of the provider's auth style should set
// Endpoint.AuthStyle.
func RegisterBrokenAuthHeaderProvider(tokenURL string) {}
// AuthStyle is a copy of the golang.org/x/oauth2 package's AuthStyle type.
type AuthStyle int
const (
AuthStyleUnknown AuthStyle = 0
AuthStyleInParams AuthStyle = 1
AuthStyleInHeader AuthStyle = 2
)
// authStyleCache is the set of tokenURLs we've successfully used via
// RetrieveToken and which style auth we ended up using.
// It's called a cache, but it doesn't (yet?) shrink. It's expected that
// the set of OAuth2 servers a program contacts over time is fixed and
// small.
var authStyleCache struct {
sync.Mutex
m map[string]AuthStyle // keyed by tokenURL
}
// ResetAuthCache resets the global authentication style cache used
// for AuthStyleUnknown token requests.
func ResetAuthCache() {
authStyleCache.Lock()
defer authStyleCache.Unlock()
authStyleCache.m = nil
}
// lookupAuthStyle reports which auth style we last used with tokenURL
// when calling RetrieveToken and whether we have ever done so.
func lookupAuthStyle(tokenURL string) (style AuthStyle, ok bool) {
authStyleCache.Lock()
defer authStyleCache.Unlock()
style, ok = authStyleCache.m[tokenURL]
return
}
// setAuthStyle adds an entry to authStyleCache, documented above.
func setAuthStyle(tokenURL string, v AuthStyle) {
authStyleCache.Lock()
defer authStyleCache.Unlock()
if authStyleCache.m == nil {
authStyleCache.m = make(map[string]AuthStyle)
}
authStyleCache.m[tokenURL] = v
}
// newTokenRequest returns a new *http.Request to retrieve a new token
// from tokenURL using the provided clientID, clientSecret, and POST
// body parameters.
//
// inParams is whether the clientID & clientSecret should be encoded
// as the POST body. An 'inParams' value of true means to send it in
// the POST body (along with any values in v); false means to send it
// in the Authorization header.
func newTokenRequest(tokenURL, clientID, clientSecret string, v url.Values, authStyle AuthStyle) (*http.Request, error) {
if authStyle == AuthStyleInParams {
v = cloneURLValues(v)
if clientID != "" {
v.Set("client_id", clientID)
}
if clientSecret != "" {
v.Set("client_secret", clientSecret)
}
}
req, err := http.NewRequest("POST", tokenURL, strings.NewReader(v.Encode()))
if err != nil {
return nil, err
}
req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
if authStyle == AuthStyleInHeader {
req.SetBasicAuth(url.QueryEscape(clientID), url.QueryEscape(clientSecret))
}
return req, nil
}
func cloneURLValues(v url.Values) url.Values {
v2 := make(url.Values, len(v))
for k, vv := range v {
v2[k] = append([]string(nil), vv...)
}
return v2
}
func RetrieveToken(ctx context.Context, clientID, clientSecret, tokenURL string, v url.Values, authStyle AuthStyle) (*Token, error) {
needsAuthStyleProbe := authStyle == 0
if needsAuthStyleProbe {
if style, ok := lookupAuthStyle(tokenURL); ok {
authStyle = style
needsAuthStyleProbe = false
} else {
authStyle = AuthStyleInHeader // the first way we'll try
}
}
req, err := newTokenRequest(tokenURL, clientID, clientSecret, v, authStyle)
if err != nil {
return nil, err
}
token, err := doTokenRoundTrip(ctx, req)
if err != nil && needsAuthStyleProbe {
// If we get an error, assume the server wants the
// clientID & clientSecret in a different form.
// See https://code.google.com/p/goauth2/issues/detail?id=31 for background.
// In summary:
// - Reddit only accepts client secret in the Authorization header
// - Dropbox accepts either it in URL param or Auth header, but not both.
// - Google only accepts URL param (not spec compliant?), not Auth header
// - Stripe only accepts client secret in Auth header with Bearer method, not Basic
//
// We used to maintain a big table in this code of all the sites and which way
// they went, but maintaining it didn't scale & got annoying.
// So just try both ways.
authStyle = AuthStyleInParams // the second way we'll try
req, _ = newTokenRequest(tokenURL, clientID, clientSecret, v, authStyle)
token, err = doTokenRoundTrip(ctx, req)
}
if needsAuthStyleProbe && err == nil {
setAuthStyle(tokenURL, authStyle)
}
// Don't overwrite `RefreshToken` with an empty value
// if this was a token refreshing request.
if token != nil && token.RefreshToken == "" {
token.RefreshToken = v.Get("refresh_token")
}
return token, err
}
func doTokenRoundTrip(ctx context.Context, req *http.Request) (*Token, error) {
r, err := ctxhttp.Do(ctx, ContextClient(ctx), req)
if err != nil {
return nil, err
}
body, err := ioutil.ReadAll(io.LimitReader(r.Body, 1<<20))
r.Body.Close()
if err != nil {
return nil, fmt.Errorf("oauth2: cannot fetch token: %v", err)
}
if code := r.StatusCode; code < 200 || code > 299 {
return nil, &RetrieveError{
Response: r,
Body: body,
}
}
var token *Token
content, _, _ := mime.ParseMediaType(r.Header.Get("Content-Type"))
switch content {
case "application/x-www-form-urlencoded", "text/plain":
vals, err := url.ParseQuery(string(body))
if err != nil {
return nil, err
}
token = &Token{
AccessToken: vals.Get("access_token"),
TokenType: vals.Get("token_type"),
RefreshToken: vals.Get("refresh_token"),
Raw: vals,
}
e := vals.Get("expires_in")
expires, _ := strconv.Atoi(e)
if expires != 0 {
token.Expiry = time.Now().Add(time.Duration(expires) * time.Second)
}
default:
var tj tokenJSON
if err = json.Unmarshal(body, &tj); err != nil {
return nil, err
}
token = &Token{
AccessToken: tj.AccessToken,
TokenType: tj.TokenType,
RefreshToken: tj.RefreshToken,
Expiry: tj.expiry(),
Raw: make(map[string]interface{}),
}
json.Unmarshal(body, &token.Raw) // no error checks for optional fields
}
if token.AccessToken == "" {
return nil, errors.New("oauth2: server response missing access_token")
}
return token, nil
}
type RetrieveError struct {
Response *http.Response
Body []byte
}
func (r *RetrieveError) Error() string {
return fmt.Sprintf("oauth2: cannot fetch token: %v\nResponse: %s", r.Response.Status, r.Body)
}

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// Copyright 2014 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package internal
import (
"context"
"net/http"
)
// HTTPClient is the context key to use with golang.org/x/net/context's
// WithValue function to associate an *http.Client value with a context.
var HTTPClient ContextKey
// ContextKey is just an empty struct. It exists so HTTPClient can be
// an immutable public variable with a unique type. It's immutable
// because nobody else can create a ContextKey, being unexported.
type ContextKey struct{}
var appengineClientHook func(context.Context) *http.Client
func ContextClient(ctx context.Context) *http.Client {
if ctx != nil {
if hc, ok := ctx.Value(HTTPClient).(*http.Client); ok {
return hc
}
}
if appengineClientHook != nil {
return appengineClientHook(ctx)
}
return http.DefaultClient
}

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// Copyright 2014 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Package jws provides a partial implementation
// of JSON Web Signature encoding and decoding.
// It exists to support the golang.org/x/oauth2 package.
//
// See RFC 7515.
//
// Deprecated: this package is not intended for public use and might be
// removed in the future. It exists for internal use only.
// Please switch to another JWS package or copy this package into your own
// source tree.
package jws // import "golang.org/x/oauth2/jws"
import (
"bytes"
"crypto"
"crypto/rand"
"crypto/rsa"
"crypto/sha256"
"encoding/base64"
"encoding/json"
"errors"
"fmt"
"strings"
"time"
)
// ClaimSet contains information about the JWT signature including the
// permissions being requested (scopes), the target of the token, the issuer,
// the time the token was issued, and the lifetime of the token.
type ClaimSet struct {
Iss string `json:"iss"` // email address of the client_id of the application making the access token request
Scope string `json:"scope,omitempty"` // space-delimited list of the permissions the application requests
Aud string `json:"aud"` // descriptor of the intended target of the assertion (Optional).
Exp int64 `json:"exp"` // the expiration time of the assertion (seconds since Unix epoch)
Iat int64 `json:"iat"` // the time the assertion was issued (seconds since Unix epoch)
Typ string `json:"typ,omitempty"` // token type (Optional).
// Email for which the application is requesting delegated access (Optional).
Sub string `json:"sub,omitempty"`
// The old name of Sub. Client keeps setting Prn to be
// complaint with legacy OAuth 2.0 providers. (Optional)
Prn string `json:"prn,omitempty"`
// See http://tools.ietf.org/html/draft-jones-json-web-token-10#section-4.3
// This array is marshalled using custom code (see (c *ClaimSet) encode()).
PrivateClaims map[string]interface{} `json:"-"`
}
func (c *ClaimSet) encode() (string, error) {
// Reverting time back for machines whose time is not perfectly in sync.
// If client machine's time is in the future according
// to Google servers, an access token will not be issued.
now := time.Now().Add(-10 * time.Second)
if c.Iat == 0 {
c.Iat = now.Unix()
}
if c.Exp == 0 {
c.Exp = now.Add(time.Hour).Unix()
}
if c.Exp < c.Iat {
return "", fmt.Errorf("jws: invalid Exp = %v; must be later than Iat = %v", c.Exp, c.Iat)
}
b, err := json.Marshal(c)
if err != nil {
return "", err
}
if len(c.PrivateClaims) == 0 {
return base64.RawURLEncoding.EncodeToString(b), nil
}
// Marshal private claim set and then append it to b.
prv, err := json.Marshal(c.PrivateClaims)
if err != nil {
return "", fmt.Errorf("jws: invalid map of private claims %v", c.PrivateClaims)
}
// Concatenate public and private claim JSON objects.
if !bytes.HasSuffix(b, []byte{'}'}) {
return "", fmt.Errorf("jws: invalid JSON %s", b)
}
if !bytes.HasPrefix(prv, []byte{'{'}) {
return "", fmt.Errorf("jws: invalid JSON %s", prv)
}
b[len(b)-1] = ',' // Replace closing curly brace with a comma.
b = append(b, prv[1:]...) // Append private claims.
return base64.RawURLEncoding.EncodeToString(b), nil
}
// Header represents the header for the signed JWS payloads.
type Header struct {
// The algorithm used for signature.
Algorithm string `json:"alg"`
// Represents the token type.
Typ string `json:"typ"`
// The optional hint of which key is being used.
KeyID string `json:"kid,omitempty"`
}
func (h *Header) encode() (string, error) {
b, err := json.Marshal(h)
if err != nil {
return "", err
}
return base64.RawURLEncoding.EncodeToString(b), nil
}
// Decode decodes a claim set from a JWS payload.
func Decode(payload string) (*ClaimSet, error) {
// decode returned id token to get expiry
s := strings.Split(payload, ".")
if len(s) < 2 {
// TODO(jbd): Provide more context about the error.
return nil, errors.New("jws: invalid token received")
}
decoded, err := base64.RawURLEncoding.DecodeString(s[1])
if err != nil {
return nil, err
}
c := &ClaimSet{}
err = json.NewDecoder(bytes.NewBuffer(decoded)).Decode(c)
return c, err
}
// Signer returns a signature for the given data.
type Signer func(data []byte) (sig []byte, err error)
// EncodeWithSigner encodes a header and claim set with the provided signer.
func EncodeWithSigner(header *Header, c *ClaimSet, sg Signer) (string, error) {
head, err := header.encode()
if err != nil {
return "", err
}
cs, err := c.encode()
if err != nil {
return "", err
}
ss := fmt.Sprintf("%s.%s", head, cs)
sig, err := sg([]byte(ss))
if err != nil {
return "", err
}
return fmt.Sprintf("%s.%s", ss, base64.RawURLEncoding.EncodeToString(sig)), nil
}
// Encode encodes a signed JWS with provided header and claim set.
// This invokes EncodeWithSigner using crypto/rsa.SignPKCS1v15 with the given RSA private key.
func Encode(header *Header, c *ClaimSet, key *rsa.PrivateKey) (string, error) {
sg := func(data []byte) (sig []byte, err error) {
h := sha256.New()
h.Write(data)
return rsa.SignPKCS1v15(rand.Reader, key, crypto.SHA256, h.Sum(nil))
}
return EncodeWithSigner(header, c, sg)
}
// Verify tests whether the provided JWT token's signature was produced by the private key
// associated with the supplied public key.
func Verify(token string, key *rsa.PublicKey) error {
parts := strings.Split(token, ".")
if len(parts) != 3 {
return errors.New("jws: invalid token received, token must have 3 parts")
}
signedContent := parts[0] + "." + parts[1]
signatureString, err := base64.RawURLEncoding.DecodeString(parts[2])
if err != nil {
return err
}
h := sha256.New()
h.Write([]byte(signedContent))
return rsa.VerifyPKCS1v15(key, crypto.SHA256, h.Sum(nil), []byte(signatureString))
}

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// Copyright 2014 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Package jwt implements the OAuth 2.0 JSON Web Token flow, commonly
// known as "two-legged OAuth 2.0".
//
// See: https://tools.ietf.org/html/draft-ietf-oauth-jwt-bearer-12
package jwt
import (
"context"
"encoding/json"
"fmt"
"io"
"io/ioutil"
"net/http"
"net/url"
"strings"
"time"
"golang.org/x/oauth2"
"golang.org/x/oauth2/internal"
"golang.org/x/oauth2/jws"
)
var (
defaultGrantType = "urn:ietf:params:oauth:grant-type:jwt-bearer"
defaultHeader = &jws.Header{Algorithm: "RS256", Typ: "JWT"}
)
// Config is the configuration for using JWT to fetch tokens,
// commonly known as "two-legged OAuth 2.0".
type Config struct {
// Email is the OAuth client identifier used when communicating with
// the configured OAuth provider.
Email string
// PrivateKey contains the contents of an RSA private key or the
// contents of a PEM file that contains a private key. The provided
// private key is used to sign JWT payloads.
// PEM containers with a passphrase are not supported.
// Use the following command to convert a PKCS 12 file into a PEM.
//
// $ openssl pkcs12 -in key.p12 -out key.pem -nodes
//
PrivateKey []byte
// PrivateKeyID contains an optional hint indicating which key is being
// used.
PrivateKeyID string
// Subject is the optional user to impersonate.
Subject string
// Scopes optionally specifies a list of requested permission scopes.
Scopes []string
// TokenURL is the endpoint required to complete the 2-legged JWT flow.
TokenURL string
// Expires optionally specifies how long the token is valid for.
Expires time.Duration
// Audience optionally specifies the intended audience of the
// request. If empty, the value of TokenURL is used as the
// intended audience.
Audience string
// PrivateClaims optionally specifies custom private claims in the JWT.
// See http://tools.ietf.org/html/draft-jones-json-web-token-10#section-4.3
PrivateClaims map[string]interface{}
// UseIDToken optionally specifies whether ID token should be used instead
// of access token when the server returns both.
UseIDToken bool
}
// TokenSource returns a JWT TokenSource using the configuration
// in c and the HTTP client from the provided context.
func (c *Config) TokenSource(ctx context.Context) oauth2.TokenSource {
return oauth2.ReuseTokenSource(nil, jwtSource{ctx, c})
}
// Client returns an HTTP client wrapping the context's
// HTTP transport and adding Authorization headers with tokens
// obtained from c.
//
// The returned client and its Transport should not be modified.
func (c *Config) Client(ctx context.Context) *http.Client {
return oauth2.NewClient(ctx, c.TokenSource(ctx))
}
// jwtSource is a source that always does a signed JWT request for a token.
// It should typically be wrapped with a reuseTokenSource.
type jwtSource struct {
ctx context.Context
conf *Config
}
func (js jwtSource) Token() (*oauth2.Token, error) {
pk, err := internal.ParseKey(js.conf.PrivateKey)
if err != nil {
return nil, err
}
hc := oauth2.NewClient(js.ctx, nil)
claimSet := &jws.ClaimSet{
Iss: js.conf.Email,
Scope: strings.Join(js.conf.Scopes, " "),
Aud: js.conf.TokenURL,
PrivateClaims: js.conf.PrivateClaims,
}
if subject := js.conf.Subject; subject != "" {
claimSet.Sub = subject
// prn is the old name of sub. Keep setting it
// to be compatible with legacy OAuth 2.0 providers.
claimSet.Prn = subject
}
if t := js.conf.Expires; t > 0 {
claimSet.Exp = time.Now().Add(t).Unix()
}
if aud := js.conf.Audience; aud != "" {
claimSet.Aud = aud
}
h := *defaultHeader
h.KeyID = js.conf.PrivateKeyID
payload, err := jws.Encode(&h, claimSet, pk)
if err != nil {
return nil, err
}
v := url.Values{}
v.Set("grant_type", defaultGrantType)
v.Set("assertion", payload)
resp, err := hc.PostForm(js.conf.TokenURL, v)
if err != nil {
return nil, fmt.Errorf("oauth2: cannot fetch token: %v", err)
}
defer resp.Body.Close()
body, err := ioutil.ReadAll(io.LimitReader(resp.Body, 1<<20))
if err != nil {
return nil, fmt.Errorf("oauth2: cannot fetch token: %v", err)
}
if c := resp.StatusCode; c < 200 || c > 299 {
return nil, &oauth2.RetrieveError{
Response: resp,
Body: body,
}
}
// tokenRes is the JSON response body.
var tokenRes struct {
AccessToken string `json:"access_token"`
TokenType string `json:"token_type"`
IDToken string `json:"id_token"`
ExpiresIn int64 `json:"expires_in"` // relative seconds from now
}
if err := json.Unmarshal(body, &tokenRes); err != nil {
return nil, fmt.Errorf("oauth2: cannot fetch token: %v", err)
}
token := &oauth2.Token{
AccessToken: tokenRes.AccessToken,
TokenType: tokenRes.TokenType,
}
raw := make(map[string]interface{})
json.Unmarshal(body, &raw) // no error checks for optional fields
token = token.WithExtra(raw)
if secs := tokenRes.ExpiresIn; secs > 0 {
token.Expiry = time.Now().Add(time.Duration(secs) * time.Second)
}
if v := tokenRes.IDToken; v != "" {
// decode returned id token to get expiry
claimSet, err := jws.Decode(v)
if err != nil {
return nil, fmt.Errorf("oauth2: error decoding JWT token: %v", err)
}
token.Expiry = time.Unix(claimSet.Exp, 0)
}
if js.conf.UseIDToken {
if tokenRes.IDToken == "" {
return nil, fmt.Errorf("oauth2: response doesn't have JWT token")
}
token.AccessToken = tokenRes.IDToken
}
return token, nil
}

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// Copyright 2014 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Package oauth2 provides support for making
// OAuth2 authorized and authenticated HTTP requests,
// as specified in RFC 6749.
// It can additionally grant authorization with Bearer JWT.
package oauth2 // import "golang.org/x/oauth2"
import (
"bytes"
"context"
"errors"
"net/http"
"net/url"
"strings"
"sync"
"golang.org/x/oauth2/internal"
)
// NoContext is the default context you should supply if not using
// your own context.Context (see https://golang.org/x/net/context).
//
// Deprecated: Use context.Background() or context.TODO() instead.
var NoContext = context.TODO()
// RegisterBrokenAuthHeaderProvider previously did something. It is now a no-op.
//
// Deprecated: this function no longer does anything. Caller code that
// wants to avoid potential extra HTTP requests made during
// auto-probing of the provider's auth style should set
// Endpoint.AuthStyle.
func RegisterBrokenAuthHeaderProvider(tokenURL string) {}
// Config describes a typical 3-legged OAuth2 flow, with both the
// client application information and the server's endpoint URLs.
// For the client credentials 2-legged OAuth2 flow, see the clientcredentials
// package (https://golang.org/x/oauth2/clientcredentials).
type Config struct {
// ClientID is the application's ID.
ClientID string
// ClientSecret is the application's secret.
ClientSecret string
// Endpoint contains the resource server's token endpoint
// URLs. These are constants specific to each server and are
// often available via site-specific packages, such as
// google.Endpoint or github.Endpoint.
Endpoint Endpoint
// RedirectURL is the URL to redirect users going through
// the OAuth flow, after the resource owner's URLs.
RedirectURL string
// Scope specifies optional requested permissions.
Scopes []string
}
// A TokenSource is anything that can return a token.
type TokenSource interface {
// Token returns a token or an error.
// Token must be safe for concurrent use by multiple goroutines.
// The returned Token must not be modified.
Token() (*Token, error)
}
// Endpoint represents an OAuth 2.0 provider's authorization and token
// endpoint URLs.
type Endpoint struct {
AuthURL string
TokenURL string
// AuthStyle optionally specifies how the endpoint wants the
// client ID & client secret sent. The zero value means to
// auto-detect.
AuthStyle AuthStyle
}
// AuthStyle represents how requests for tokens are authenticated
// to the server.
type AuthStyle int
const (
// AuthStyleAutoDetect means to auto-detect which authentication
// style the provider wants by trying both ways and caching
// the successful way for the future.
AuthStyleAutoDetect AuthStyle = 0
// AuthStyleInParams sends the "client_id" and "client_secret"
// in the POST body as application/x-www-form-urlencoded parameters.
AuthStyleInParams AuthStyle = 1
// AuthStyleInHeader sends the client_id and client_password
// using HTTP Basic Authorization. This is an optional style
// described in the OAuth2 RFC 6749 section 2.3.1.
AuthStyleInHeader AuthStyle = 2
)
var (
// AccessTypeOnline and AccessTypeOffline are options passed
// to the Options.AuthCodeURL method. They modify the
// "access_type" field that gets sent in the URL returned by
// AuthCodeURL.
//
// Online is the default if neither is specified. If your
// application needs to refresh access tokens when the user
// is not present at the browser, then use offline. This will
// result in your application obtaining a refresh token the
// first time your application exchanges an authorization
// code for a user.
AccessTypeOnline AuthCodeOption = SetAuthURLParam("access_type", "online")
AccessTypeOffline AuthCodeOption = SetAuthURLParam("access_type", "offline")
// ApprovalForce forces the users to view the consent dialog
// and confirm the permissions request at the URL returned
// from AuthCodeURL, even if they've already done so.
ApprovalForce AuthCodeOption = SetAuthURLParam("prompt", "consent")
)
// An AuthCodeOption is passed to Config.AuthCodeURL.
type AuthCodeOption interface {
setValue(url.Values)
}
type setParam struct{ k, v string }
func (p setParam) setValue(m url.Values) { m.Set(p.k, p.v) }
// SetAuthURLParam builds an AuthCodeOption which passes key/value parameters
// to a provider's authorization endpoint.
func SetAuthURLParam(key, value string) AuthCodeOption {
return setParam{key, value}
}
// AuthCodeURL returns a URL to OAuth 2.0 provider's consent page
// that asks for permissions for the required scopes explicitly.
//
// State is a token to protect the user from CSRF attacks. You must
// always provide a non-empty string and validate that it matches the
// the state query parameter on your redirect callback.
// See http://tools.ietf.org/html/rfc6749#section-10.12 for more info.
//
// Opts may include AccessTypeOnline or AccessTypeOffline, as well
// as ApprovalForce.
// It can also be used to pass the PKCE challenge.
// See https://www.oauth.com/oauth2-servers/pkce/ for more info.
func (c *Config) AuthCodeURL(state string, opts ...AuthCodeOption) string {
var buf bytes.Buffer
buf.WriteString(c.Endpoint.AuthURL)
v := url.Values{
"response_type": {"code"},
"client_id": {c.ClientID},
}
if c.RedirectURL != "" {
v.Set("redirect_uri", c.RedirectURL)
}
if len(c.Scopes) > 0 {
v.Set("scope", strings.Join(c.Scopes, " "))
}
if state != "" {
// TODO(light): Docs say never to omit state; don't allow empty.
v.Set("state", state)
}
for _, opt := range opts {
opt.setValue(v)
}
if strings.Contains(c.Endpoint.AuthURL, "?") {
buf.WriteByte('&')
} else {
buf.WriteByte('?')
}
buf.WriteString(v.Encode())
return buf.String()
}
// PasswordCredentialsToken converts a resource owner username and password
// pair into a token.
//
// Per the RFC, this grant type should only be used "when there is a high
// degree of trust between the resource owner and the client (e.g., the client
// is part of the device operating system or a highly privileged application),
// and when other authorization grant types are not available."
// See https://tools.ietf.org/html/rfc6749#section-4.3 for more info.
//
// The provided context optionally controls which HTTP client is used. See the HTTPClient variable.
func (c *Config) PasswordCredentialsToken(ctx context.Context, username, password string) (*Token, error) {
v := url.Values{
"grant_type": {"password"},
"username": {username},
"password": {password},
}
if len(c.Scopes) > 0 {
v.Set("scope", strings.Join(c.Scopes, " "))
}
return retrieveToken(ctx, c, v)
}
// Exchange converts an authorization code into a token.
//
// It is used after a resource provider redirects the user back
// to the Redirect URI (the URL obtained from AuthCodeURL).
//
// The provided context optionally controls which HTTP client is used. See the HTTPClient variable.
//
// The code will be in the *http.Request.FormValue("code"). Before
// calling Exchange, be sure to validate FormValue("state").
//
// Opts may include the PKCE verifier code if previously used in AuthCodeURL.
// See https://www.oauth.com/oauth2-servers/pkce/ for more info.
func (c *Config) Exchange(ctx context.Context, code string, opts ...AuthCodeOption) (*Token, error) {
v := url.Values{
"grant_type": {"authorization_code"},
"code": {code},
}
if c.RedirectURL != "" {
v.Set("redirect_uri", c.RedirectURL)
}
for _, opt := range opts {
opt.setValue(v)
}
return retrieveToken(ctx, c, v)
}
// Client returns an HTTP client using the provided token.
// The token will auto-refresh as necessary. The underlying
// HTTP transport will be obtained using the provided context.
// The returned client and its Transport should not be modified.
func (c *Config) Client(ctx context.Context, t *Token) *http.Client {
return NewClient(ctx, c.TokenSource(ctx, t))
}
// TokenSource returns a TokenSource that returns t until t expires,
// automatically refreshing it as necessary using the provided context.
//
// Most users will use Config.Client instead.
func (c *Config) TokenSource(ctx context.Context, t *Token) TokenSource {
tkr := &tokenRefresher{
ctx: ctx,
conf: c,
}
if t != nil {
tkr.refreshToken = t.RefreshToken
}
return &reuseTokenSource{
t: t,
new: tkr,
}
}
// tokenRefresher is a TokenSource that makes "grant_type"=="refresh_token"
// HTTP requests to renew a token using a RefreshToken.
type tokenRefresher struct {
ctx context.Context // used to get HTTP requests
conf *Config
refreshToken string
}
// WARNING: Token is not safe for concurrent access, as it
// updates the tokenRefresher's refreshToken field.
// Within this package, it is used by reuseTokenSource which
// synchronizes calls to this method with its own mutex.
func (tf *tokenRefresher) Token() (*Token, error) {
if tf.refreshToken == "" {
return nil, errors.New("oauth2: token expired and refresh token is not set")
}
tk, err := retrieveToken(tf.ctx, tf.conf, url.Values{
"grant_type": {"refresh_token"},
"refresh_token": {tf.refreshToken},
})
if err != nil {
return nil, err
}
if tf.refreshToken != tk.RefreshToken {
tf.refreshToken = tk.RefreshToken
}
return tk, err
}
// reuseTokenSource is a TokenSource that holds a single token in memory
// and validates its expiry before each call to retrieve it with
// Token. If it's expired, it will be auto-refreshed using the
// new TokenSource.
type reuseTokenSource struct {
new TokenSource // called when t is expired.
mu sync.Mutex // guards t
t *Token
}
// Token returns the current token if it's still valid, else will
// refresh the current token (using r.Context for HTTP client
// information) and return the new one.
func (s *reuseTokenSource) Token() (*Token, error) {
s.mu.Lock()
defer s.mu.Unlock()
if s.t.Valid() {
return s.t, nil
}
t, err := s.new.Token()
if err != nil {
return nil, err
}
s.t = t
return t, nil
}
// StaticTokenSource returns a TokenSource that always returns the same token.
// Because the provided token t is never refreshed, StaticTokenSource is only
// useful for tokens that never expire.
func StaticTokenSource(t *Token) TokenSource {
return staticTokenSource{t}
}
// staticTokenSource is a TokenSource that always returns the same Token.
type staticTokenSource struct {
t *Token
}
func (s staticTokenSource) Token() (*Token, error) {
return s.t, nil
}
// HTTPClient is the context key to use with golang.org/x/net/context's
// WithValue function to associate an *http.Client value with a context.
var HTTPClient internal.ContextKey
// NewClient creates an *http.Client from a Context and TokenSource.
// The returned client is not valid beyond the lifetime of the context.
//
// Note that if a custom *http.Client is provided via the Context it
// is used only for token acquisition and is not used to configure the
// *http.Client returned from NewClient.
//
// As a special case, if src is nil, a non-OAuth2 client is returned
// using the provided context. This exists to support related OAuth2
// packages.
func NewClient(ctx context.Context, src TokenSource) *http.Client {
if src == nil {
return internal.ContextClient(ctx)
}
return &http.Client{
Transport: &Transport{
Base: internal.ContextClient(ctx).Transport,
Source: ReuseTokenSource(nil, src),
},
}
}
// ReuseTokenSource returns a TokenSource which repeatedly returns the
// same token as long as it's valid, starting with t.
// When its cached token is invalid, a new token is obtained from src.
//
// ReuseTokenSource is typically used to reuse tokens from a cache
// (such as a file on disk) between runs of a program, rather than
// obtaining new tokens unnecessarily.
//
// The initial token t may be nil, in which case the TokenSource is
// wrapped in a caching version if it isn't one already. This also
// means it's always safe to wrap ReuseTokenSource around any other
// TokenSource without adverse effects.
func ReuseTokenSource(t *Token, src TokenSource) TokenSource {
// Don't wrap a reuseTokenSource in itself. That would work,
// but cause an unnecessary number of mutex operations.
// Just build the equivalent one.
if rt, ok := src.(*reuseTokenSource); ok {
if t == nil {
// Just use it directly.
return rt
}
src = rt.new
}
return &reuseTokenSource{
t: t,
new: src,
}
}

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// Copyright 2014 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package oauth2
import (
"context"
"fmt"
"net/http"
"net/url"
"strconv"
"strings"
"time"
"golang.org/x/oauth2/internal"
)
// expiryDelta determines how earlier a token should be considered
// expired than its actual expiration time. It is used to avoid late
// expirations due to client-server time mismatches.
const expiryDelta = 10 * time.Second
// Token represents the credentials used to authorize
// the requests to access protected resources on the OAuth 2.0
// provider's backend.
//
// Most users of this package should not access fields of Token
// directly. They're exported mostly for use by related packages
// implementing derivative OAuth2 flows.
type Token struct {
// AccessToken is the token that authorizes and authenticates
// the requests.
AccessToken string `json:"access_token"`
// TokenType is the type of token.
// The Type method returns either this or "Bearer", the default.
TokenType string `json:"token_type,omitempty"`
// RefreshToken is a token that's used by the application
// (as opposed to the user) to refresh the access token
// if it expires.
RefreshToken string `json:"refresh_token,omitempty"`
// Expiry is the optional expiration time of the access token.
//
// If zero, TokenSource implementations will reuse the same
// token forever and RefreshToken or equivalent
// mechanisms for that TokenSource will not be used.
Expiry time.Time `json:"expiry,omitempty"`
// raw optionally contains extra metadata from the server
// when updating a token.
raw interface{}
}
// Type returns t.TokenType if non-empty, else "Bearer".
func (t *Token) Type() string {
if strings.EqualFold(t.TokenType, "bearer") {
return "Bearer"
}
if strings.EqualFold(t.TokenType, "mac") {
return "MAC"
}
if strings.EqualFold(t.TokenType, "basic") {
return "Basic"
}
if t.TokenType != "" {
return t.TokenType
}
return "Bearer"
}
// SetAuthHeader sets the Authorization header to r using the access
// token in t.
//
// This method is unnecessary when using Transport or an HTTP Client
// returned by this package.
func (t *Token) SetAuthHeader(r *http.Request) {
r.Header.Set("Authorization", t.Type()+" "+t.AccessToken)
}
// WithExtra returns a new Token that's a clone of t, but using the
// provided raw extra map. This is only intended for use by packages
// implementing derivative OAuth2 flows.
func (t *Token) WithExtra(extra interface{}) *Token {
t2 := new(Token)
*t2 = *t
t2.raw = extra
return t2
}
// Extra returns an extra field.
// Extra fields are key-value pairs returned by the server as a
// part of the token retrieval response.
func (t *Token) Extra(key string) interface{} {
if raw, ok := t.raw.(map[string]interface{}); ok {
return raw[key]
}
vals, ok := t.raw.(url.Values)
if !ok {
return nil
}
v := vals.Get(key)
switch s := strings.TrimSpace(v); strings.Count(s, ".") {
case 0: // Contains no "."; try to parse as int
if i, err := strconv.ParseInt(s, 10, 64); err == nil {
return i
}
case 1: // Contains a single "."; try to parse as float
if f, err := strconv.ParseFloat(s, 64); err == nil {
return f
}
}
return v
}
// timeNow is time.Now but pulled out as a variable for tests.
var timeNow = time.Now
// expired reports whether the token is expired.
// t must be non-nil.
func (t *Token) expired() bool {
if t.Expiry.IsZero() {
return false
}
return t.Expiry.Round(0).Add(-expiryDelta).Before(timeNow())
}
// Valid reports whether t is non-nil, has an AccessToken, and is not expired.
func (t *Token) Valid() bool {
return t != nil && t.AccessToken != "" && !t.expired()
}
// tokenFromInternal maps an *internal.Token struct into
// a *Token struct.
func tokenFromInternal(t *internal.Token) *Token {
if t == nil {
return nil
}
return &Token{
AccessToken: t.AccessToken,
TokenType: t.TokenType,
RefreshToken: t.RefreshToken,
Expiry: t.Expiry,
raw: t.Raw,
}
}
// retrieveToken takes a *Config and uses that to retrieve an *internal.Token.
// This token is then mapped from *internal.Token into an *oauth2.Token which is returned along
// with an error..
func retrieveToken(ctx context.Context, c *Config, v url.Values) (*Token, error) {
tk, err := internal.RetrieveToken(ctx, c.ClientID, c.ClientSecret, c.Endpoint.TokenURL, v, internal.AuthStyle(c.Endpoint.AuthStyle))
if err != nil {
if rErr, ok := err.(*internal.RetrieveError); ok {
return nil, (*RetrieveError)(rErr)
}
return nil, err
}
return tokenFromInternal(tk), nil
}
// RetrieveError is the error returned when the token endpoint returns a
// non-2XX HTTP status code.
type RetrieveError struct {
Response *http.Response
// Body is the body that was consumed by reading Response.Body.
// It may be truncated.
Body []byte
}
func (r *RetrieveError) Error() string {
return fmt.Sprintf("oauth2: cannot fetch token: %v\nResponse: %s", r.Response.Status, r.Body)
}

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