4581ada210
This patch rolls chromium to r486981 and prepares for the introduction of device emulation.
109 lines
4.2 KiB
JavaScript
109 lines
4.2 KiB
JavaScript
/**
|
|
* Copyright 2017 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.
|
|
*/
|
|
|
|
class Navigator {
|
|
/**
|
|
* @param {!Connection} client
|
|
* @param {string} url
|
|
* @param {string=} referrer
|
|
* @param {!Object=} options
|
|
*/
|
|
constructor(client, url, referrer, options = {}) {
|
|
this._client = client;
|
|
this._url = url;
|
|
this._referrer = referrer;
|
|
this._maxTime = typeof options['maxTime'] === 'number' ? options['maxTime'] : 30000;
|
|
this._idleTime = typeof options['networkIdleTimeout'] === 'number' ? options['networkIdleTimeout'] : 1000;
|
|
this._idleInflight = typeof options['networkIdleInflight'] === 'number' ? options['networkIdleInflight'] : 2;
|
|
this._waitUntil = typeof options['waitUntil'] === 'string' ? options['waitUntil'] : 'load';
|
|
|
|
console.assert(this._waitUntil === 'load' || this._waitUntil === 'networkidle', 'Unknown value for options.waitUntil: ' + this._waitUntil);
|
|
}
|
|
|
|
/**
|
|
* @return {!Promise}
|
|
*/
|
|
async navigate() {
|
|
this._init();
|
|
let certificateError = new Promise(fulfill => this._client.once('Security.certificateError', fulfill))
|
|
.then(error => new Error('SSL Certiciate error: ' + error.errorType));
|
|
let networkIdle = new Promise(fulfill => this._networkIdleCallback = fulfill).then(() => null);
|
|
let loadEventFired = new Promise(fulfill => this._client.once('Page.loadEventFired', fulfill)).then(() => null);
|
|
let watchdog = new Promise(fulfill => this._maximumTimer = setTimeout(fulfill, this._maxTime)).then(() => new Error('Navigation Timeout Exceeded: ' + this._maxTime + 'ms exceeded'));
|
|
|
|
try {
|
|
// Await for the command to throw exception in case of illegal arguments.
|
|
await this._client.send('Page.navigate', {url: this._url, referrer: this._referrer});
|
|
const error = await Promise.race([certificateError, watchdog, this._waitUntil === 'load' ? loadEventFired : networkIdle]);
|
|
if (error)
|
|
throw error;
|
|
} finally {
|
|
this._cleanup();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param {!Object} event
|
|
*/
|
|
_onLoadingStarted(event) {
|
|
this._requestIds.add(event.requestId);
|
|
if (!event.redirectResponse)
|
|
++this._inflightRequests;
|
|
if (this._inflightRequests > this._idleInflight) {
|
|
clearTimeout(this._idleTimer);
|
|
this._idleTimer = null;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param {!Object} event
|
|
*/
|
|
_onLoadingCompleted(event) {
|
|
if (!this._requestIds.has(event.requestId))
|
|
return;
|
|
|
|
--this._inflightRequests;
|
|
if (this._inflightRequests <= this._idleInflight && !this._idleTimer)
|
|
this._idleTimer = setTimeout(this._networkIdleCallback, this._idleTime);
|
|
}
|
|
|
|
_init() {
|
|
this._loadingStartedHandler = this._onLoadingStarted.bind(this);
|
|
this._loadingCompletedHandler = this._onLoadingCompleted.bind(this);
|
|
this._client.on('Network.requestWillBeSent', this._loadingStartedHandler);
|
|
this._client.on('Network.loadingFinished', this._loadingCompletedHandler);
|
|
this._client.on('Network.loadingFailed', this._loadingCompletedHandler);
|
|
this._client.on('Network.webSocketCreated', this._loadingStartedHandler);
|
|
this._client.on('Network.webSocketClosed', this._loadingCompletedHandler);
|
|
|
|
this._inflightRequests = 0;
|
|
this._requestIds = new Set();
|
|
}
|
|
|
|
_cleanup() {
|
|
this._client.removeListener('Network.requestWillBeSent', this._loadingStartedHandler);
|
|
this._client.removeListener('Network.loadingFinished', this._loadingCompletedHandler);
|
|
this._client.removeListener('Network.loadingFailed', this._loadingCompletedHandler);
|
|
this._client.removeListener('Network.webSocketCreated', this._loadingStartedHandler);
|
|
this._client.removeListener('Network.webSocketClosed', this._loadingCompletedHandler);
|
|
|
|
clearTimeout(this._idleTimer);
|
|
clearTimeout(this._maximumTimer);
|
|
}
|
|
}
|
|
|
|
module.exports = Navigator;
|