oauth2/google/appengine.go

38 lines
1008 B
Go

// Copyright 2014 The oauth2 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 google
import (
"time"
"appengine"
"golang.org/x/oauth2"
)
// AppEngineTokenSource returns a token source that fetches tokens
// issued to the current App Engine application's service account.
// If you are implementing a 3-legged OAuth 2.0 flow on App Engine
// that involves user accounts, see oauth2.Config instead.
//
// The provided context must have come from appengine.NewContext.
func AppEngineTokenSource(ctx oauth2.Context, scope ...string) oauth2.TokenSource {
return &appEngineTokenSource{
ctx: ctx,
scopes: scope,
fetcherFunc: aeFetcherFunc,
}
}
var aeFetcherFunc = func(ctx oauth2.Context, scope ...string) (string, time.Time, error) {
c, ok := ctx.(appengine.Context)
if !ok {
return "", time.Time{}, errInvalidContext
}
return appengine.AccessToken(c, scope...)
}