68 lines
1.7 KiB
Go
68 lines
1.7 KiB
Go
/*
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Copyright 2015 Google Inc. All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package gce_cloud
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import (
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"encoding/json"
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"net/http"
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"time"
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"code.google.com/p/google-api-go-client/googleapi"
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"golang.org/x/oauth2"
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"golang.org/x/oauth2/google"
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)
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type altTokenSource struct {
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oauthClient *http.Client
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tokenURL string
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}
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func (a *altTokenSource) Token() (*oauth2.Token, error) {
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req, err := http.NewRequest("GET", a.tokenURL, nil)
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if err != nil {
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return nil, err
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}
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res, err := a.oauthClient.Do(req)
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if err != nil {
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return nil, err
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}
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defer res.Body.Close()
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if err := googleapi.CheckResponse(res); err != nil {
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return nil, err
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}
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var tok struct {
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AccessToken string `json:"accessToken"`
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ExpiryTimeSeconds int64 `json:"expiryTimeSeconds,string"`
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}
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if err := json.NewDecoder(res.Body).Decode(&tok); err != nil {
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return nil, err
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}
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return &oauth2.Token{
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AccessToken: tok.AccessToken,
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Expiry: time.Unix(tok.ExpiryTimeSeconds, 0),
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}, nil
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}
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func newAltTokenSource(tokenURL string) oauth2.TokenSource {
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client := oauth2.NewClient(oauth2.NoContext, google.ComputeTokenSource(""))
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a := &altTokenSource{
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oauthClient: client,
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tokenURL: tokenURL,
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}
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return oauth2.ReuseTokenSource(nil, a)
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}
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