# all files / lighthouse-core/driver/gatherers/ http-redirect.js

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     /**
     * @license
     * Copyright 2016 Google Inc. All rights reserved.
     *
     * 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.
     */
    'use strict';

    const Gather = require('./gather');

    class HTTPRedirect extends Gather {

      constructor() {
        super();
        this._noSecurityChangesTimeout = undefined;
        this._preRedirectURL = undefined;
      }

      beforePass(options) {
        this._preRedirectURL = options.url;
        options.url = this._preRedirectURL.replace(/^https/, 'http');
      }

      afterPass(options) {
        const driver = options.driver;
        const timeout = options.timeout || 10000;

        // Reset the options.
        options.url = this._preRedirectURL;

        return new Promise((resolve, reject) => {
          // Set up a timeout for ten seconds in case we don't get any
          // security events at all. If that happens, bail.
          this._noSecurityChangesTimeout = setTimeout(_ => {
            this.artifact = {
              value: false,
              debugString: 'Timed out waiting for HTTP redirection.'
            };

            resolve();
          }, timeout);

          driver.getSecurityState()
            .then(state => {
              // We've received a security event, so this needs
              // to be canceled, otherwise we resolve the promise with an error.
              Eif (this._noSecurityChangesTimeout !== undefined) {
                clearTimeout(this._noSecurityChangesTimeout);
              }

              this.artifact = {
                value: state.schemeIsCryptographic
              };

              resolve();
            }, _ => {
              this.artifact = {
                value: false,
                debugString: 'Error requesting security state'
              };

              reject();
            });
        });
      }
    }

    module.exports = HTTPRedirect;