mirror of
https://github.com/atlanticbiomedical/biomedjs.git
synced 2025-07-02 00:47:26 -04:00
91 lines
2.7 KiB
JavaScript
91 lines
2.7 KiB
JavaScript
/**
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* Copyright 2012 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 request = require('request'),
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pkg = require('../package.json');
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/**
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* Default transporter constructor.
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* Wraps request and callback functions.
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*/
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function DefaultTransporter() {}
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/**
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* Default user agent.
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*/
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DefaultTransporter.prototype.USER_AGENT =
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'google-api-nodejs-client/' + pkg.version;
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/**
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* Configures request options before making a request.
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* @param {object} opts Options to configure.
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* @return {object} Configured options.
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*/
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DefaultTransporter.prototype.configure = function(opts) {
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// set transporter user agent
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opts.headers = opts.headers || {};
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opts.headers['User-Agent'] = opts.headers['User-Agent'] ?
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opts.headers['User-Agent'] + ' ' + this.USER_AGENT : this.USER_AGENT;
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return opts;
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};
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/**
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* Makes a request with given options and invokes callback.
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* @param {object} opts Options.
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* @param {Function=} opt_callback Optional callback.
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*/
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DefaultTransporter.prototype.request = function(opts, opt_callback) {
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opts = this.configure(opts);
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request(opts, this.wrapCallback_(opt_callback));
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};
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/**
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* @private
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* Wraps the response callback.
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* @param {Function=} opt_callback Optional callback.
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* @return {Function} Wrapped callback function.
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*/
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DefaultTransporter.prototype.wrapCallback_ = function(opt_callback) {
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return function(err, res, body) {
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if (err || !body) {
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opt_callback && opt_callback(err, null, res);
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} else if (body && body.error) {
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// handle single request errors
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err = body.error;
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delete body.error;
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opt_callback(err, body, res);
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} else {
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// TODO(burcud): Logic not related to the means of transportation
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// should be handled elsewhere.
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var errors = null;
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// iterate over objects to check if there are errors or not.
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for (var i = 0; i < body.length; i++) {
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if (body[i].error) {
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errors = errors || [];
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errors[i] = body[i].error;
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delete body[i].error;
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}
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}
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opt_callback && opt_callback(errors, body, res);
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}
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};
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};
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/**
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* Exports DefaultTransporter.
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*/
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module.exports = DefaultTransporter;
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