polygerrit-ui/app/elements/shared/gr-rest-api-interface/gr-rest-api-interface.js

// Copyright (C) 2016 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
(function() {
  'use strict';

  var JSON_PREFIX = ')]}\'';

  Polymer({
    is: 'gr-rest-api-interface',

    fetchJSON: function(url, opt_cancelCondition, opt_opts) {
      opt_opts = opt_opts || {};

      var fetchOptions = {
        credentials: (opt_opts.noCredentials ? undefined : 'same-origin'),
        headers: opt_opts.headers,
      };

      return fetch(url, fetchOptions).then(function(response) {
        if (opt_cancelCondition && opt_cancelCondition()) {
          response.body.cancel();
          return;
        }

        return response.text().then(function(text) {
          return JSON.parse(text.substring(JSON_PREFIX.length));
        });
      }).catch(function(err) {
        if (opt_opts.noCredentials) {
          throw err;
        } else {
          // This could be because of a 302 auth redirect. Retry the request.
          return this.fetchJSON(url, opt_cancelCondition, Object.assign(
              opt_opts, {noCredentials: true}));
        }
      }.bind(this));
    },

    getAccountDetail: function() {
      return this.fetchJSON('/accounts/self/detail');
    },

  });
})();