mirror of
https://github.com/puppeteer/puppeteer
synced 2024-06-14 14:02:48 +00:00
bbde8fd1c2
This patch improves on page.evaluate to accept a string. The string can have a trailing '//# sourceURL=' comment which would name the evaluation to make stacks beautiful. In order to make sourceURL comments possible, this patch: - removes wrapping of the client function into `Promise.resolve()` - stops passing `awaitPromise` parameter to `Runtime.evaluate` - starts to await promise via the `Runtime.awaitPromise` if the return type of the evaluation is promise closes #118
705 lines
17 KiB
JavaScript
705 lines
17 KiB
JavaScript
/**
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* Copyright 2017 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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let await = require('./utilities').await;
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let EventEmitter = require('events');
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let fs = require('fs');
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let path = require('path');
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let PageEvents = require('../lib/Page').Events;
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let noop = function() { };
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class WebPage {
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/**
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* @param {!Browser} browser
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* @param {string} scriptPath
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* @param {!Object=} options
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*/
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constructor(browser, scriptPath, options) {
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this._page = await(browser.newPage());
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this.settings = new WebPageSettings(this._page);
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options = options || {};
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options.settings = options.settings || {};
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if (options.settings.userAgent)
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this.settings.userAgent = options.settings.userAgent;
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if (options.viewportSize)
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await(this._page.setViewport(options.viewportSize));
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this.loading = false;
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this.loadingProgress = 0;
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this.clipRect = options.clipRect || {left: 0, top: 0, width: 0, height: 0};
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this.onConsoleMessage = null;
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this.onLoadFinished = null;
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this.onResourceError = null;
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this.onResourceReceived = null;
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this._onInitialized = undefined;
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this._deferEvaluate = false;
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this._customHeaders = {};
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this._currentFrame = this._page.mainFrame();
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this.libraryPath = path.dirname(scriptPath);
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this._onResourceRequestedCallback = undefined;
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this._onConfirmCallback = undefined;
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this._onAlertCallback = undefined;
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this._onError = noop;
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this._pageEvents = new AsyncEmitter(this._page);
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this._pageEvents.on(PageEvents.Response, response => this._onResponseReceived(response));
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this._pageEvents.on(PageEvents.RequestFinished, request => this._onRequestFinished(request));
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this._pageEvents.on(PageEvents.RequestFailed, event => (this.onResourceError || noop).call(null, event));
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this._pageEvents.on(PageEvents.Console, (...args) => this._onConsole(...args));
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this._pageEvents.on(PageEvents.Confirm, message => this._onConfirm(message));
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this._pageEvents.on(PageEvents.Alert, message => this._onAlert(message));
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this._pageEvents.on(PageEvents.Dialog, dialog => this._onDialog(dialog));
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this._pageEvents.on(PageEvents.PageError, error => (this._onError || noop).call(null, error.message, error.stack));
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this.event = {
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key: {
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A: 65,
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B: 66,
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C: 67,
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Home: ['Home'],
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Delete: ['Delete'],
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Backspace: ['Backspace'],
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Cut: ['Cut'],
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Paste: ['Paste']
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},
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modifier: {
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shift: 'Shift'
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}
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};
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}
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/**
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* @param {!Array<!Object>} args
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*/
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_onConsole(...args) {
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if (!this.onConsoleMessage)
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return;
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const text = args.join(' ');
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this.onConsoleMessage(text);
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}
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/**
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* @return {string}
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*/
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currentFrameName() {
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return this.frameName;
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}
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/**
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* @return {number}
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*/
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childFramesCount() {
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return this.framesCount;
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}
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/**
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* @return {!Array<string>}
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*/
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childFramesName() {
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return this.framesName;
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}
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/**
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* @param {(string|number)} frameName
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* @return {boolean}
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*/
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switchToChildFrame(frame) {
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return this.switchToFrame(frame);
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}
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/**
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* @return {string}
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*/
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get frameName() {
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return this._currentFrame.name();
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}
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/**
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* @return {number}
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*/
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get framesCount() {
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return this._currentFrame.childFrames().length;
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}
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/**
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* @return {!Array<string>}
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*/
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get framesName() {
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return this._currentFrame.childFrames().map(frame => frame.name());
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}
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/**
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* @return {string}
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*/
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get focusedFrameName() {
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let focusedFrame = this._focusedFrame();
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return focusedFrame ? focusedFrame.name() : '';
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}
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/**
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* @return {?Frame}
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*/
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_focusedFrame() {
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let frames = this._currentFrame.childFrames().slice();
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frames.push(this._currentFrame);
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let promises = frames.map(frame => frame.evaluate(() => document.hasFocus()));
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let result = await(Promise.all(promises));
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for (let i = 0; i < result.length; ++i) {
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if (result[i])
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return frames[i];
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}
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return null;
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}
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switchToFocusedFrame() {
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let frame = this._focusedFrame();
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this._currentFrame = frame;
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}
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/**
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* @param {(string|number)} frameName
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* @return {boolean}
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*/
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switchToFrame(frameName) {
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let frame = null;
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if (typeof frameName === 'string')
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frame = this._currentFrame.childFrames().find(frame => frame.name() === frameName);
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else if (typeof frameName === 'number')
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frame = this._currentFrame.childFrames()[frameName];
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if (!frame)
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return false;
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this._currentFrame = frame;
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return true;
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}
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/**
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* @return {boolean}
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*/
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switchToParentFrame() {
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let frame = this._currentFrame.parentFrame();
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if (!frame)
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return false;
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this._currentFrame = frame;
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return true;
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}
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switchToMainFrame() {
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this._currentFrame = this._page.mainFrame();
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}
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get onInitialized() {
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return this._onInitialized;
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}
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set onInitialized(value) {
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if (typeof value !== 'function')
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this._onInitialized = undefined;
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else
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this._onInitialized = value;
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}
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/**
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* @return {?function(!Object, !Request)}
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*/
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get onResourceRequested() {
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return this._onResourceRequestedCallback;
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}
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/**
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* @return {?function(!Object, !Request)} callback
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*/
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set onResourceRequested(callback) {
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this._onResourceRequestedCallback = callback;
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this._page.setRequestInterceptor(callback ? resourceInterceptor : null);
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/**
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* @param {!InterceptedRequest} request
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*/
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function resourceInterceptor(request) {
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let requestData = new RequestData(request);
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let phantomRequest = new PhantomRequest(request);
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callback(requestData, phantomRequest);
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if (phantomRequest._aborted)
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request.abort();
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else
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request.continue();
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}
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}
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_onResponseReceived(response) {
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if (!this.onResourceReceived)
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return;
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let phantomResponse = new PhantomResponse(response, false /* isResponseFinished */);
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this.onResourceReceived.call(null, phantomResponse);
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}
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_onRequestFinished(request) {
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if (!this.onResourceReceived)
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return;
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let phantomResponse = new PhantomResponse(request.response(), true /* isResponseFinished */);
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this.onResourceReceived.call(null, phantomResponse);
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}
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/**
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* @param {string} url
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* @param {function()} callback
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*/
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includeJs(url, callback) {
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this._page.addScriptTag(url).then(callback);
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}
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/**
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* @return {!{width: number, height: number}}
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*/
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get viewportSize() {
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return this._page.viewport();
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}
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/**
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* @return {!Object}
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*/
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get customHeaders() {
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return this._customHeaders;
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}
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/**
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* @param {!Object} value
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*/
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set customHeaders(value) {
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this._customHeaders = value;
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await(this._page.setHTTPHeaders(value));
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}
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/**
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* @param {string} filePath
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*/
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injectJs(filePath) {
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if (!fs.existsSync(filePath))
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filePath = path.resolve(this.libraryPath, filePath);
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if (!fs.existsSync(filePath))
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return false;
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await(this._page.injectFile(filePath));
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return true;
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}
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/**
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* @return {string}
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*/
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get plainText() {
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return await(this._page.plainText());
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}
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/**
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* @return {string}
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*/
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get title() {
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return await(this._page.title());
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}
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/**
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* @return {(function()|undefined)}
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*/
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get onError() {
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return this._onError;
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}
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/**
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* @param {(function()|undefined)} handler
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*/
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set onError(handler) {
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if (typeof handler !== 'function')
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handler = undefined;
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this._onError = handler;
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}
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/**
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* @return {(function()|undefined)}
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*/
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get onConfirm() {
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return this._onConfirmCallback;
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}
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/**
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* @param {function()} handler
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*/
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set onConfirm(handler) {
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if (typeof handler !== 'function')
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handler = undefined;
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this._onConfirmCallback = handler;
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}
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/**
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* @return {(function()|undefined)}
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*/
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get onAlert() {
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return this._onAlertCallback;
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}
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/**
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* @param {function()} handler
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*/
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set onAlert(handler) {
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if (typeof handler !== 'function')
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handler = undefined;
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this._onAlertCallback = handler;
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}
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/**
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* @param {!Dialog} dialog
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*/
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_onDialog(dialog) {
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if (dialog.type === 'alert' && this._onAlertCallback) {
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this._onAlertCallback.call(null, dialog.message());
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await(dialog.accept());
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} else if (dialog.type === 'confirm' && this._onConfirmCallback) {
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let result = this._onConfirmCallback.call(null, dialog.message());
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await(result ? dialog.accept() : dialog.dismiss());
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}
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}
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/**
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* @return {string}
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*/
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get url() {
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return await(this._page.url());
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}
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/**
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* @param {string} html
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*/
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set content(html) {
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await(this._page.setContent(html));
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}
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/**
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* @param {string} selector
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* @param {(string|!Array<string>)} files
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*/
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uploadFile(selector, files) {
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if (typeof files === 'string')
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await(this._page.uploadFile(selector, files));
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else
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await(this._page.uploadFile(selector, ...files));
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}
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/**
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* @param {string} eventType
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* @param {!Array<*>} args
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*/
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sendEvent(eventType, ...args) {
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if (eventType.startsWith('key'))
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this._sendKeyboardEvent.apply(this, arguments);
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else
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this._sendMouseEvent.apply(this, arguments);
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}
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/**
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* @param {string} eventType
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* @param {string} keyOrKeys
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* @param {null} nop1
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* @param {null} nop2
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* @param {number} modifier
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*/
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_sendKeyboardEvent(eventType, keyOrKeys, nop1, nop2, modifier) {
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switch (eventType) {
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case 'keyup':
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if (typeof keyOrKeys === 'number') {
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await(this._page.keyboard.up(String.fromCharCode(keyOrKeys)));
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break;
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}
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for (let key of keyOrKeys)
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await(this._page.keyboard.up(key));
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break;
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case 'keypress':
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if (modifier & 0x04000000)
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this._page.keyboard.down('Control');
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if (modifier & 0x02000000)
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this._page.keyboard.down('Shift');
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if (keyOrKeys instanceof Array) {
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this._page.keyboard.down(keyOrKeys[0]);
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await(this._page.keyboard.up(keyOrKeys[0]));
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} else if (typeof keyOrKeys === 'number') {
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await(this._page.type(String.fromCharCode(keyOrKeys)));
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} else {
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await(this._page.type(keyOrKeys));
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}
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if (modifier & 0x02000000)
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this._page.keyboard.up('Shift');
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if (modifier & 0x04000000)
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this._page.keyboard.up('Control');
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break;
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case 'keydown':
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if (typeof keyOrKeys === 'number') {
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await(this._page.keyboard.down(String.fromCharCode(keyOrKeys)));
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break;
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}
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for (let key of keyOrKeys)
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await(this._page.keyboard.down(key));
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break;
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}
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}
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/**
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* @param {string} eventType
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* @param {number} x
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* @param {number} y
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* @param {string|undefined} button
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* @param {number|undefined} modifier
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*/
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_sendMouseEvent(eventType, x, y, button, modifier) {
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if (modifier)
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await(this._page.keyboard.down(modifier));
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switch (eventType) {
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case 'mousemove':
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await(this._page.mouse.move(x, y));
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break;
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case 'mousedown':
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await(this._page.mouse.move(x, y));
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await(this._page.mouse.down({button}));
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break;
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case 'mouseup':
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await(this._page.mouse.move(x, y));
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await(this._page.mouse.up({button}));
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break;
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case 'doubleclick':
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await(this._page.mouse.click(x, y, {button}));
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await(this._page.mouse.click(x, y, {button, clickCount: 2}));
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break;
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case 'click':
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await(this._page.mouse.click(x, y, {button}));
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break;
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case 'contextmenu':
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await(this._page.mouse.click(x, y, {button: 'right'}));
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break;
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}
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if (modifier)
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await(this._page.keyboard.up(modifier));
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}
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/**
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* @param {string} html
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* @param {function()=} callback
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*/
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open(url, callback) {
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console.assert(arguments.length <= 2, 'WebPage.open does not support METHOD and DATA arguments');
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this._deferEvaluate = true;
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if (typeof this._onInitialized === 'function')
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this._onInitialized();
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this._deferEvaluate = false;
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this.loading = true;
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this.loadingProgress = 50;
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const handleNavigation = (error, response) => {
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this.loadingProgress = 100;
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this.loading = false;
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if (error) {
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this.onResourceError.call(null, {
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url,
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errorString: 'SSL handshake failed'
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});
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}
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let status = error ? 'fail' : 'success';
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if (this.onLoadFinished)
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this.onLoadFinished.call(null, status);
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if (callback)
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callback.call(null, status);
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this.loadingProgress = 0;
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};
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this._page.navigate(url).then(response => handleNavigation(null, response))
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.catch(e => handleNavigation(e, null));
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}
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/**
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* @param {!{width: number, height: number}} options
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*/
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set viewportSize(options) {
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await(this._page.setViewport(options));
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}
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/**
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* @param {function()|string} fun
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* @param {!Array<!Object>} args
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*/
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evaluate(fun, ...args) {
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if (typeof fun === 'string')
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fun = `(${fun})()`;
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if (this._deferEvaluate)
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return await(this._page.evaluateOnNewDocument(fun, ...args));
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return await(this._currentFrame.evaluate(fun, ...args));
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}
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/**
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* {string} fileName
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*/
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render(fileName) {
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if (fileName.endsWith('pdf')) {
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let options = {};
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let paperSize = this.paperSize || {};
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options.margin = paperSize.margin;
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options.format = paperSize.format;
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options.landscape = paperSize.orientation === 'landscape';
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options.width = paperSize.width;
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options.height = paperSize.height;
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options.path = fileName;
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await(this._page.pdf(options));
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} else {
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let options = {};
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if (this.clipRect && (this.clipRect.left || this.clipRect.top || this.clipRect.width || this.clipRect.height)) {
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options.clip = {
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x: this.clipRect.left,
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y: this.clipRect.top,
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width: this.clipRect.width,
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height: this.clipRect.height
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};
|
|
}
|
|
options.path = fileName;
|
|
await(this._page.screenshot(options));
|
|
}
|
|
}
|
|
|
|
release() {
|
|
this._page.close();
|
|
}
|
|
|
|
close() {
|
|
this._page.close();
|
|
}
|
|
}
|
|
|
|
class WebPageSettings {
|
|
/**
|
|
* @param {!Page} page
|
|
*/
|
|
constructor(page) {
|
|
this._page = page;
|
|
}
|
|
|
|
/**
|
|
* @param {string} value
|
|
*/
|
|
set userAgent(value) {
|
|
await(this._page.setUserAgent(value));
|
|
}
|
|
|
|
/**
|
|
* @return {string}
|
|
*/
|
|
get userAgent() {
|
|
return await(this._page.evaluate(() => window.navigator.userAgent));
|
|
}
|
|
}
|
|
|
|
class PhantomRequest {
|
|
/**
|
|
* @param {!InterceptedRequest} request
|
|
*/
|
|
constructor(request) {
|
|
this._request = request;
|
|
}
|
|
|
|
/**
|
|
* @param {string} key
|
|
* @param {string} value
|
|
*/
|
|
setHeader(key, value) {
|
|
this._request.headers.set(key, value);
|
|
}
|
|
|
|
abort() {
|
|
this._aborted = true;
|
|
}
|
|
|
|
/**
|
|
* @param {string} url
|
|
*/
|
|
changeUrl(newUrl) {
|
|
this._request.url = newUrl;
|
|
}
|
|
}
|
|
|
|
class PhantomResponse {
|
|
/**
|
|
* @param {!Response} response
|
|
* @param {boolean} isResponseFinished
|
|
*/
|
|
constructor(response, isResponseFinished) {
|
|
this.url = response.url;
|
|
this.status = response.status;
|
|
this.statusText = response.statusText;
|
|
this.stage = isResponseFinished ? 'end' : 'start';
|
|
this.headers = [];
|
|
for (let entry of response.headers.entries()) {
|
|
this.headers.push({
|
|
name: entry[0],
|
|
value: entry[1]
|
|
});
|
|
}
|
|
}
|
|
}
|
|
|
|
class RequestData {
|
|
/**
|
|
* @param {!InterceptedRequest} request
|
|
*/
|
|
constructor(request) {
|
|
this.url = request.url,
|
|
this.headers = {};
|
|
for (let entry of request.headers.entries())
|
|
this.headers[entry[0]] = entry[1];
|
|
}
|
|
}
|
|
|
|
// To prevent reenterability, eventemitters should emit events
|
|
// only being in a consistent state.
|
|
// This is not the case for 'ws' npm module: https://goo.gl/sy3dJY
|
|
//
|
|
// Since out phantomjs environment uses nested event loops, we
|
|
// exploit this condition in 'ws', which probably never happens
|
|
// in case of regular I/O.
|
|
//
|
|
// This class is a wrapper around EventEmitter which re-emits events asynchronously,
|
|
// helping to overcome the issue.
|
|
class AsyncEmitter extends EventEmitter {
|
|
/**
|
|
* @param {!Page} page
|
|
*/
|
|
constructor(page) {
|
|
super();
|
|
this._page = page;
|
|
this._symbol = Symbol('AsyncEmitter');
|
|
this.on('newListener', this._onListenerAdded);
|
|
this.on('removeListener', this._onListenerRemoved);
|
|
}
|
|
|
|
_onListenerAdded(event, listener) {
|
|
// Async listener calls original listener on next tick.
|
|
let asyncListener = (...args) => {
|
|
process.nextTick(() => listener.apply(null, args));
|
|
};
|
|
listener[this._symbol] = asyncListener;
|
|
this._page.on(event, asyncListener);
|
|
}
|
|
|
|
_onListenerRemoved(event, listener) {
|
|
this._page.removeListener(event, listener[this._symbol]);
|
|
}
|
|
}
|
|
|
|
module.exports = WebPage;
|