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80 lines
2.1 KiB
JavaScript
80 lines
2.1 KiB
JavaScript
/**
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* Copyright 2013 Google Inc. All Rights Reserved.
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*
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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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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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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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var querystring = require('querystring');
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var Auth2Client = require('./oauth2client.js');
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var util = require('util');
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/**
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* @private
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* Google Compute Engine metadata server token endpoint.
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*/
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Compute.GOOGLE_OAUTH2_TOKEN_URL_ =
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'http://metadata/computeMetadata/v1beta1/instance/service-accounts/default/token';
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/**
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* @constructor
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* Google Compute Engine service account credentials.
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*
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* Retrieve access token from the metadata server.
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* See: https://developers.google.com/compute/docs/authentication
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*
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*/
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function Compute() {
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Compute.super_.call(this);
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}
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/**
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* Inherit from Auth2Client.
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*/
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util.inherits(Compute, Auth2Client);
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/**
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* Get the initial access token from compute metadata server.
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* @param {function=} opt_callback Optional callback.
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*/
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Compute.prototype.authorize = function(opt_callback) {
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var that = this;
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that.refreshToken_(null, function(err, result) {
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if (!err) {
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that.credentials = result;
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that.credentials.refresh_token = 'compute-placeholder';
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}
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opt_callback && opt_callback(err, result);
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});
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};
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/**
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* @private
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* Refreshes the access token.
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* @param {object=} ignored_
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* @param {function=} opt_callback Optional callback.
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*/
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Compute.prototype.refreshToken_ = function(ignored_, opt_callback) {
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var uri = this.opts.tokenUrl || Compute.GOOGLE_OAUTH2_TOKEN_URL_;
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// request for new token
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this.transporter.request({
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method: 'GET',
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uri: uri,
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json: true
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}, opt_callback);
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};
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/**
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* Export Compute.
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*/
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module.exports = Compute;
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