| // 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" |
| "log" |
| "sync" |
| |
| "golang.org/x/oauth2" |
| ) |
| |
| var logOnce sync.Once // only spam about deprecation once |
| |
| // 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. |
| // |
| // The current version of this library requires at least Go 1.17 to build, |
| // so first generation App Engine runtimes (<= Go 1.9) are unsupported. |
| // Previously, on first generation App Engine runtimes, AppEngineTokenSource |
| // returned 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 { |
| 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("") |
| } |