puppeteer/lib/Browser.js

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/**
* 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.
*/
const { helper, assert } = require('./helper');
const Target = require('./Target');
const EventEmitter = require('events');
const TaskQueue = require('./TaskQueue');
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class Browser extends EventEmitter {
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/**
* @param {!Puppeteer.Connection} connection
* @param {!Array<string>} contextIds
* @param {boolean} ignoreHTTPSErrors
* @param {boolean} setDefaultViewport
* @param {?Puppeteer.ChildProcess} process
* @param {(function():Promise)=} closeCallback
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*/
constructor(connection, contextIds, ignoreHTTPSErrors, setDefaultViewport, process, closeCallback) {
super();
this._ignoreHTTPSErrors = ignoreHTTPSErrors;
this._setDefaultViewport = setDefaultViewport;
this._process = process;
this._screenshotTaskQueue = new TaskQueue();
this._connection = connection;
this._closeCallback = closeCallback || new Function();
this._defaultContext = new BrowserContext(this, null);
/** @type {Map<string, BrowserContext>} */
this._contexts = new Map();
for (const contextId of contextIds)
this._contexts.set(contextId, new BrowserContext(this, contextId));
/** @type {Map<string, Target>} */
this._targets = new Map();
this._connection.setClosedCallback(() => {
this.emit(Browser.Events.Disconnected);
});
this._connection.on('Target.targetCreated', this._targetCreated.bind(this));
this._connection.on('Target.targetDestroyed', this._targetDestroyed.bind(this));
this._connection.on('Target.targetInfoChanged', this._targetInfoChanged.bind(this));
}
/**
* @return {?Puppeteer.ChildProcess}
*/
process() {
return this._process;
}
/**
* @return {!Promise<!BrowserContext>}
*/
async createIncognitoBrowserContext() {
const {browserContextId} = await this._connection.send('Target.createBrowserContext');
const context = new BrowserContext(this, browserContextId);
this._contexts.set(browserContextId, context);
return context;
}
/**
* @return {!Array<!BrowserContext>}
*/
browserContexts() {
return [this._defaultContext, ...Array.from(this._contexts.values())];
}
/**
* @param {?string} contextId
*/
async _disposeContext(contextId) {
await this._connection.send('Target.disposeBrowserContext', {browserContextId: contextId || undefined});
this._contexts.delete(contextId);
}
/**
* @param {!Puppeteer.Connection} connection
* @param {!Array<string>} contextIds
* @param {boolean} ignoreHTTPSErrors
* @param {boolean} appMode
* @param {?Puppeteer.ChildProcess} process
* @param {function()=} closeCallback
*/
static async create(connection, contextIds, ignoreHTTPSErrors, appMode, process, closeCallback) {
const browser = new Browser(connection, contextIds, ignoreHTTPSErrors, appMode, process, closeCallback);
await connection.send('Target.setDiscoverTargets', {discover: true});
return browser;
}
/**
* @param {!Protocol.Target.targetCreatedPayload} event
*/
async _targetCreated(event) {
const targetInfo = event.targetInfo;
const {browserContextId} = targetInfo;
const context = (browserContextId && this._contexts.has(browserContextId)) ? this._contexts.get(browserContextId) : this._defaultContext;
const target = new Target(targetInfo, context, () => this._connection.createSession(targetInfo), this._ignoreHTTPSErrors, this._setDefaultViewport, this._screenshotTaskQueue);
assert(!this._targets.has(event.targetInfo.targetId), 'Target should not exist before targetCreated');
this._targets.set(event.targetInfo.targetId, target);
if (await target._initializedPromise) {
this.emit(Browser.Events.TargetCreated, target);
context.emit(BrowserContext.Events.TargetCreated, target);
}
}
/**
* @param {{targetId: string}} event
*/
async _targetDestroyed(event) {
const target = this._targets.get(event.targetId);
target._initializedCallback(false);
this._targets.delete(event.targetId);
target._closedCallback();
if (await target._initializedPromise) {
this.emit(Browser.Events.TargetDestroyed, target);
target.browserContext().emit(BrowserContext.Events.TargetDestroyed, target);
}
}
/**
* @param {!Protocol.Target.targetInfoChangedPayload} event
*/
_targetInfoChanged(event) {
const target = this._targets.get(event.targetInfo.targetId);
assert(target, 'target should exist before targetInfoChanged');
const previousURL = target.url();
const wasInitialized = target._isInitialized;
target._targetInfoChanged(event.targetInfo);
if (wasInitialized && previousURL !== target.url()) {
this.emit(Browser.Events.TargetChanged, target);
target.browserContext().emit(BrowserContext.Events.TargetChanged, target);
}
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}
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/**
* @return {string}
*/
wsEndpoint() {
return this._connection.url();
}
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/**
* @return {!Promise<!Puppeteer.Page>}
*/
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async newPage() {
return this._defaultContext.newPage();
}
/**
* @param {string} contextId
* @return {!Promise<!Puppeteer.Page>}
*/
async _createPageInContext(contextId) {
const {targetId} = await this._connection.send('Target.createTarget', {url: 'about:blank', browserContextId: contextId || undefined});
const target = await this._targets.get(targetId);
assert(await target._initializedPromise, 'Failed to create target for page');
const page = await target.page();
return page;
}
/**
* @return {!Array<!Target>}
*/
targets() {
return Array.from(this._targets.values()).filter(target => target._isInitialized);
}
/**
* @return {!Promise<!Array<!Puppeteer.Page>>}
*/
async pages() {
const pages = await Promise.all(
this.targets()
.filter(target => target.type() === 'page')
.map(target => target.page())
);
return pages.filter(page => !!page);
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}
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/**
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* @return {!Promise<string>}
*/
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async version() {
const version = await this._getVersion();
return version.product;
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}
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/**
* @return {!Promise<string>}
*/
async userAgent() {
const version = await this._getVersion();
return version.userAgent;
}
async close() {
await this._closeCallback.call(null);
this.disconnect();
}
disconnect() {
this._connection.dispose();
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}
/**
* @return {!Promise<!Object>}
*/
_getVersion() {
return this._connection.send('Browser.getVersion');
}
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}
/** @enum {string} */
Browser.Events = {
TargetCreated: 'targetcreated',
TargetDestroyed: 'targetdestroyed',
TargetChanged: 'targetchanged',
Disconnected: 'disconnected'
};
class BrowserContext extends EventEmitter {
/**
* @param {!Browser} browser
* @param {?string} contextId
*/
constructor(browser, contextId) {
super();
this._browser = browser;
this._id = contextId;
}
/**
* @return {!Array<!Target>} target
*/
targets() {
return this._browser.targets().filter(target => target.browserContext() === this);
}
/**
* @return {boolean}
*/
isIncognito() {
return !!this._id;
}
/**
* @return {!Promise<!Puppeteer.Page>}
*/
newPage() {
return this._browser._createPageInContext(this._id);
}
/**
* @return {!Browser}
*/
browser() {
return this._browser;
}
async close() {
assert(this._id, 'Non-incognito profiles cannot be closed!');
await this._browser._disposeContext(this._id);
}
}
/** @enum {string} */
BrowserContext.Events = {
TargetCreated: 'targetcreated',
TargetDestroyed: 'targetdestroyed',
TargetChanged: 'targetchanged',
};
helper.tracePublicAPI(BrowserContext);
helper.tracePublicAPI(Browser);
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module.exports = {Browser, BrowserContext};
/**
* @typedef {Object} BrowserOptions
* @property {boolean=} appMode
* @property {boolean=} ignoreHTTPSErrors
*/