mirror of
https://github.com/puppeteer/puppeteer
synced 2024-06-14 14:02:48 +00:00
735 lines
21 KiB
JavaScript
735 lines
21 KiB
JavaScript
const {helper, assert} = require('./helper');
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const {TimeoutError} = require('./Errors');
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const fs = require('fs');
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const util = require('util');
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const EventEmitter = require('events');
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const {Events} = require('./Events');
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const {ExecutionContext} = require('./ExecutionContext');
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const readFileAsync = util.promisify(fs.readFile);
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class FrameManager extends EventEmitter {
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/**
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* @param {PageSession} session
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* @param {Page} page
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*/
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constructor(session, page, timeoutSettings) {
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super();
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this._session = session;
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this._page = page;
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this._timeoutSettings = timeoutSettings;
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this._mainFrame = null;
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this._frames = new Map();
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this._eventListeners = [
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helper.addEventListener(this._session, 'Page.eventFired', this._onEventFired.bind(this)),
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helper.addEventListener(this._session, 'Page.frameAttached', this._onFrameAttached.bind(this)),
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helper.addEventListener(this._session, 'Page.frameDetached', this._onFrameDetached.bind(this)),
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];
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}
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frame(frameId) {
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return this._frames.get(frameId);
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}
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mainFrame() {
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return this._mainFrame;
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}
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frames() {
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/** @type {!Array<!Frame>} */
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let frames = [];
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collect(this._mainFrame);
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return frames;
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function collect(frame) {
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frames.push(frame);
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for (const subframe of frame._children)
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collect(subframe);
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}
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}
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_onFrameAttached(params) {
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const frame = new Frame(this._session, this, this._page, params.frameId, this._timeoutSettings);
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const parentFrame = this._frames.get(params.parentFrameId) || null;
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if (parentFrame) {
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frame._parentFrame = parentFrame;
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parentFrame._children.add(frame);
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} else {
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assert(!this._mainFrame, 'INTERNAL ERROR: re-attaching main frame!');
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this._mainFrame = frame;
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}
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this._frames.set(params.frameId, frame);
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this.emit(Events.FrameManager.FrameAttached, frame);
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}
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_onFrameDetached(params) {
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const frame = this._frames.get(params.frameId);
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this._frames.delete(params.frameId);
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frame._detach();
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this.emit(Events.FrameManager.FrameDetached, frame);
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}
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_onEventFired({frameId, name}) {
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const frame = this._frames.get(frameId);
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frame._firedEvents.add(name.toLowerCase());
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if (frame === this._mainFrame) {
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if (name === 'load')
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this.emit(Events.FrameManager.Load);
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else if (name === 'DOMContentLoaded')
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this.emit(Events.FrameManager.DOMContentLoaded);
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}
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}
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dispose() {
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helper.removeEventListeners(this._eventListeners);
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}
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}
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class Frame {
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/**
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* @param {*} session
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* @param {!Page} page
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* @param {string} frameId
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*/
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constructor(session, frameManager, page, frameId, timeoutSettings) {
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this._session = session;
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this._frameManager = frameManager;
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this._timeoutSettings = timeoutSettings;
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this._page = page;
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this._frameId = frameId;
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/** @type {?Frame} */
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this._parentFrame = null;
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this._url = '';
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this._name = '';
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/** @type {!Set<!Frame>} */
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this._children = new Set();
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this._isDetached = false;
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this._firedEvents = new Set();
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/** @type {!Set<!WaitTask>} */
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this._waitTasks = new Set();
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this._documentPromise = null;
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this._executionContext = new ExecutionContext(this._session, this, this._frameId);
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}
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async executionContext() {
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return this._executionContext;
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}
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/**
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* @param {string} selector
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* @param {!{delay?: number, button?: string, clickCount?: number}=} options
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*/
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async click(selector, options = {}) {
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const handle = await this.$(selector);
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assert(handle, 'No node found for selector: ' + selector);
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await handle.click(options);
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await handle.dispose();
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}
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/**
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* @param {string} selector
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* @param {string} text
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* @param {{delay: (number|undefined)}=} options
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*/
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async type(selector, text, options) {
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const handle = await this.$(selector);
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assert(handle, 'No node found for selector: ' + selector);
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await handle.type(text, options);
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await handle.dispose();
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}
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/**
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* @param {string} selector
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*/
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async focus(selector) {
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const handle = await this.$(selector);
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assert(handle, 'No node found for selector: ' + selector);
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await handle.focus();
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await handle.dispose();
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}
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/**
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* @param {string} selector
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*/
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async hover(selector) {
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const handle = await this.$(selector);
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assert(handle, 'No node found for selector: ' + selector);
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await handle.hover();
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await handle.dispose();
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}
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_detach() {
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this._parentFrame._children.delete(this);
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this._parentFrame = null;
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this._isDetached = true;
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for (const waitTask of this._waitTasks)
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waitTask.terminate(new Error('waitForFunction failed: frame got detached.'));
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}
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_navigated(url, name, navigationId) {
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this._url = url;
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this._name = name;
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this._lastCommittedNavigationId = navigationId;
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this._documentPromise = null;
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this._firedEvents.clear();
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}
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/**
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* @param {string} selector
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* @param {!Array<string>} values
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* @return {!Promise<!Array<string>>}
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*/
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select(selector, ...values) {
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for (const value of values)
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assert(helper.isString(value), 'Values must be strings. Found value "' + value + '" of type "' + (typeof value) + '"');
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return this.$eval(selector, (element, values) => {
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if (element.nodeName.toLowerCase() !== 'select')
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throw new Error('Element is not a <select> element.');
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const options = Array.from(element.options);
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element.value = undefined;
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for (const option of options) {
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option.selected = values.includes(option.value);
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if (option.selected && !element.multiple)
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break;
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}
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element.dispatchEvent(new Event('input', { 'bubbles': true }));
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element.dispatchEvent(new Event('change', { 'bubbles': true }));
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return options.filter(option => option.selected).map(option => option.value);
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}, values);
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}
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/**
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* @param {(string|number|Function)} selectorOrFunctionOrTimeout
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* @param {!{polling?: string|number, timeout?: number, visible?: boolean, hidden?: boolean}=} options
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* @param {!Array<*>} args
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* @return {!Promise<!JSHandle>}
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*/
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waitFor(selectorOrFunctionOrTimeout, options, ...args) {
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const xPathPattern = '//';
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if (helper.isString(selectorOrFunctionOrTimeout)) {
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const string = /** @type {string} */ (selectorOrFunctionOrTimeout);
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if (string.startsWith(xPathPattern))
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return this.waitForXPath(string, options);
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return this.waitForSelector(string, options);
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}
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if (helper.isNumber(selectorOrFunctionOrTimeout))
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return new Promise(fulfill => setTimeout(fulfill, /** @type {number} */ (selectorOrFunctionOrTimeout)));
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if (typeof selectorOrFunctionOrTimeout === 'function')
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return this.waitForFunction(selectorOrFunctionOrTimeout, options, ...args);
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return Promise.reject(new Error('Unsupported target type: ' + (typeof selectorOrFunctionOrTimeout)));
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}
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/**
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* @param {Function|string} pageFunction
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* @param {!{polling?: string|number, timeout?: number}=} options
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* @return {!Promise<!JSHandle>}
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*/
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waitForFunction(pageFunction, options = {}, ...args) {
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const {
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polling = 'raf',
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timeout = this._timeoutSettings.timeout(),
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} = options;
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return new WaitTask(this, pageFunction, 'function', polling, timeout, ...args).promise;
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}
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/**
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* @param {string} selector
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* @param {!{timeout?: number, visible?: boolean, hidden?: boolean}=} options
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* @return {!Promise<!ElementHandle>}
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*/
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waitForSelector(selector, options) {
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return this._waitForSelectorOrXPath(selector, false, options);
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}
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/**
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* @param {string} xpath
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* @param {!{timeout?: number, visible?: boolean, hidden?: boolean}=} options
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* @return {!Promise<!ElementHandle>}
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*/
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waitForXPath(xpath, options) {
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return this._waitForSelectorOrXPath(xpath, true, options);
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}
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/**
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* @param {string} selectorOrXPath
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* @param {boolean} isXPath
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* @param {!{timeout?: number, visible?: boolean, hidden?: boolean}=} options
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* @return {!Promise<!ElementHandle>}
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*/
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_waitForSelectorOrXPath(selectorOrXPath, isXPath, options = {}) {
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const {
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visible: waitForVisible = false,
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hidden: waitForHidden = false,
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timeout = this._timeoutSettings.timeout(),
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} = options;
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const polling = waitForVisible || waitForHidden ? 'raf' : 'mutation';
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const title = `${isXPath ? 'XPath' : 'selector'} "${selectorOrXPath}"${waitForHidden ? ' to be hidden' : ''}`;
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return new WaitTask(this, predicate, title, polling, timeout, selectorOrXPath, isXPath, waitForVisible, waitForHidden).promise;
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/**
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* @param {string} selectorOrXPath
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* @param {boolean} isXPath
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* @param {boolean} waitForVisible
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* @param {boolean} waitForHidden
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* @return {?Node|boolean}
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*/
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function predicate(selectorOrXPath, isXPath, waitForVisible, waitForHidden) {
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const node = isXPath
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? document.evaluate(selectorOrXPath, document, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null).singleNodeValue
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: document.querySelector(selectorOrXPath);
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if (!node)
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return waitForHidden;
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if (!waitForVisible && !waitForHidden)
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return node;
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const element = /** @type {Element} */ (node.nodeType === Node.TEXT_NODE ? node.parentElement : node);
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const style = window.getComputedStyle(element);
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const isVisible = style && style.visibility !== 'hidden' && hasVisibleBoundingBox();
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const success = (waitForVisible === isVisible || waitForHidden === !isVisible);
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return success ? node : null;
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/**
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* @return {boolean}
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*/
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function hasVisibleBoundingBox() {
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const rect = element.getBoundingClientRect();
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return !!(rect.top || rect.bottom || rect.width || rect.height);
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}
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}
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}
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/**
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* @return {!Promise<String>}
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*/
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async content() {
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return await this.evaluate(() => {
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let retVal = '';
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if (document.doctype)
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retVal = new XMLSerializer().serializeToString(document.doctype);
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if (document.documentElement)
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retVal += document.documentElement.outerHTML;
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return retVal;
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});
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}
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/**
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* @param {string} html
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*/
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async setContent(html) {
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await this.evaluate(html => {
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document.open();
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document.write(html);
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document.close();
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}, html);
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}
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async evaluate(pageFunction, ...args) {
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return this._executionContext.evaluate(pageFunction, ...args);
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}
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_document() {
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if (!this._documentPromise)
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this._documentPromise = this.evaluateHandle('document').then(handle => handle.asElement());
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return this._documentPromise;
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}
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/**
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* @param {string} selector
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* @return {!Promise<?ElementHandle>}
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*/
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async $(selector) {
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const document = await this._document();
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return document.$(selector);
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}
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/**
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* @param {string} selector
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* @return {!Promise<!Array<!ElementHandle>>}
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*/
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async $$(selector) {
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const document = await this._document();
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return document.$$(selector);
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}
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/**
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* @param {string} selector
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* @param {Function|String} pageFunction
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* @param {!Array<*>} args
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* @return {!Promise<(!Object|undefined)>}
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*/
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async $eval(selector, pageFunction, ...args) {
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const document = await this._document();
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return document.$eval(selector, pageFunction, ...args);
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}
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/**
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* @param {string} selector
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* @param {Function|String} pageFunction
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* @param {!Array<*>} args
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* @return {!Promise<(!Object|undefined)>}
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*/
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async $$eval(selector, pageFunction, ...args) {
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const document = await this._document();
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return document.$$eval(selector, pageFunction, ...args);
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}
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/**
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* @param {string} expression
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* @return {!Promise<!Array<!ElementHandle>>}
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*/
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async $x(expression) {
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const document = await this._document();
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return document.$x(expression);
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}
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async evaluateHandle(pageFunction, ...args) {
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return this._executionContext.evaluateHandle(pageFunction, ...args);
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}
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/**
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* @param {!{content?: string, path?: string, type?: string, url?: string}} options
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* @return {!Promise<!ElementHandle>}
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*/
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async addScriptTag(options) {
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if (typeof options.url === 'string') {
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const url = options.url;
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try {
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return (await this.evaluateHandle(addScriptUrl, url, options.type)).asElement();
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} catch (error) {
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throw new Error(`Loading script from ${url} failed`);
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}
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}
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if (typeof options.path === 'string') {
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let contents = await readFileAsync(options.path, 'utf8');
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contents += '//# sourceURL=' + options.path.replace(/\n/g, '');
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return (await this.evaluateHandle(addScriptContent, contents, options.type)).asElement();
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}
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if (typeof options.content === 'string') {
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return (await this.evaluateHandle(addScriptContent, options.content, options.type)).asElement();
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}
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throw new Error('Provide an object with a `url`, `path` or `content` property');
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/**
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* @param {string} url
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* @param {string} type
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* @return {!Promise<!HTMLElement>}
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*/
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async function addScriptUrl(url, type) {
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const script = document.createElement('script');
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script.src = url;
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if (type)
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script.type = type;
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const promise = new Promise((res, rej) => {
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script.onload = res;
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script.onerror = rej;
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});
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document.head.appendChild(script);
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await promise;
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return script;
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}
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/**
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* @param {string} content
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* @param {string} type
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* @return {!HTMLElement}
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*/
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function addScriptContent(content, type = 'text/javascript') {
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const script = document.createElement('script');
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script.type = type;
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script.text = content;
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let error = null;
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script.onerror = e => error = e;
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document.head.appendChild(script);
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if (error)
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throw error;
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return script;
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}
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}
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/**
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* @param {!{content?: string, path?: string, url?: string}} options
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* @return {!Promise<!ElementHandle>}
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*/
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async addStyleTag(options) {
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if (typeof options.url === 'string') {
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const url = options.url;
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try {
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return (await this.evaluateHandle(addStyleUrl, url)).asElement();
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} catch (error) {
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throw new Error(`Loading style from ${url} failed`);
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}
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}
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if (typeof options.path === 'string') {
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let contents = await readFileAsync(options.path, 'utf8');
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contents += '/*# sourceURL=' + options.path.replace(/\n/g, '') + '*/';
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return (await this.evaluateHandle(addStyleContent, contents)).asElement();
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}
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if (typeof options.content === 'string') {
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return (await this.evaluateHandle(addStyleContent, options.content)).asElement();
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}
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throw new Error('Provide an object with a `url`, `path` or `content` property');
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/**
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* @param {string} url
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* @return {!Promise<!HTMLElement>}
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*/
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async function addStyleUrl(url) {
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const link = document.createElement('link');
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link.rel = 'stylesheet';
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link.href = url;
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const promise = new Promise((res, rej) => {
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link.onload = res;
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link.onerror = rej;
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});
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document.head.appendChild(link);
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await promise;
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return link;
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}
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/**
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* @param {string} content
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* @return {!Promise<!HTMLElement>}
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*/
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async function addStyleContent(content) {
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const style = document.createElement('style');
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style.type = 'text/css';
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style.appendChild(document.createTextNode(content));
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const promise = new Promise((res, rej) => {
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style.onload = res;
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style.onerror = rej;
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});
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document.head.appendChild(style);
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await promise;
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return style;
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}
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}
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/**
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* @return {!Promise<string>}
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*/
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async title() {
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return this.evaluate(() => document.title);
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}
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name() {
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return this._name;
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}
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isDetached() {
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return this._isDetached;
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}
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childFrames() {
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return Array.from(this._children);
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}
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url() {
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return this._url;
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}
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parentFrame() {
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return this._parentFrame;
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}
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}
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/**
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* @internal
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*/
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class WaitTask {
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/**
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* @param {!Frame} frame
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* @param {Function|string} predicateBody
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* @param {string|number} polling
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* @param {number} timeout
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* @param {!Array<*>} args
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*/
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constructor(frame, predicateBody, title, polling, timeout, ...args) {
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if (helper.isString(polling))
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assert(polling === 'raf' || polling === 'mutation', 'Unknown polling option: ' + polling);
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else if (helper.isNumber(polling))
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assert(polling > 0, 'Cannot poll with non-positive interval: ' + polling);
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else
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throw new Error('Unknown polling options: ' + polling);
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this._frame = frame;
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this._polling = polling;
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this._timeout = timeout;
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this._predicateBody = helper.isString(predicateBody) ? 'return ' + predicateBody : 'return (' + predicateBody + ')(...args)';
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this._args = args;
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this._runCount = 0;
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frame._waitTasks.add(this);
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this.promise = new Promise((resolve, reject) => {
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this._resolve = resolve;
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this._reject = reject;
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});
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// Since page navigation requires us to re-install the pageScript, we should track
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// timeout on our end.
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if (timeout) {
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const timeoutError = new TimeoutError(`waiting for ${title} failed: timeout ${timeout}ms exceeded`);
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this._timeoutTimer = setTimeout(() => this.terminate(timeoutError), timeout);
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}
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this.rerun();
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}
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/**
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* @param {!Error} error
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*/
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terminate(error) {
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this._terminated = true;
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this._reject(error);
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this._cleanup();
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}
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async rerun() {
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const runCount = ++this._runCount;
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/** @type {?JSHandle} */
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let success = null;
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let error = null;
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try {
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success = await this._frame.evaluateHandle(waitForPredicatePageFunction, this._predicateBody, this._polling, this._timeout, ...this._args);
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} catch (e) {
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error = e;
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}
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if (this._terminated || runCount !== this._runCount) {
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if (success)
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await success.dispose();
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return;
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}
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// Ignore timeouts in pageScript - we track timeouts ourselves.
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// If the frame's execution context has already changed, `frame.evaluate` will
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// throw an error - ignore this predicate run altogether.
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if (!error && await this._frame.evaluate(s => !s, success).catch(e => true)) {
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await success.dispose();
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return;
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}
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// When the page is navigated, the promise is rejected.
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// Try again right away.
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if (error && error.message.includes('Execution context was destroyed')) {
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this.rerun();
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return;
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}
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if (error)
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this._reject(error);
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else
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this._resolve(success);
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this._cleanup();
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}
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_cleanup() {
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clearTimeout(this._timeoutTimer);
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this._frame._waitTasks.delete(this);
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this._runningTask = null;
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}
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}
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/**
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* @param {string} predicateBody
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* @param {string} polling
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* @param {number} timeout
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* @return {!Promise<*>}
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*/
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async function waitForPredicatePageFunction(predicateBody, polling, timeout, ...args) {
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const predicate = new Function('...args', predicateBody);
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let timedOut = false;
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if (timeout)
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setTimeout(() => timedOut = true, timeout);
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if (polling === 'raf')
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return await pollRaf();
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if (polling === 'mutation')
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return await pollMutation();
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if (typeof polling === 'number')
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return await pollInterval(polling);
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/**
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* @return {!Promise<*>}
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*/
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function pollMutation() {
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const success = predicate.apply(null, args);
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if (success)
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return Promise.resolve(success);
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let fulfill;
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const result = new Promise(x => fulfill = x);
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const observer = new MutationObserver(mutations => {
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if (timedOut) {
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observer.disconnect();
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fulfill();
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}
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const success = predicate.apply(null, args);
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if (success) {
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observer.disconnect();
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fulfill(success);
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}
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});
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observer.observe(document, {
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childList: true,
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subtree: true,
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attributes: true
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});
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return result;
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}
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/**
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* @return {!Promise<*>}
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*/
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function pollRaf() {
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let fulfill;
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const result = new Promise(x => fulfill = x);
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onRaf();
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return result;
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function onRaf() {
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if (timedOut) {
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fulfill();
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return;
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}
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const success = predicate.apply(null, args);
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if (success)
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fulfill(success);
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else
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requestAnimationFrame(onRaf);
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}
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}
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/**
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* @param {number} pollInterval
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* @return {!Promise<*>}
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*/
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function pollInterval(pollInterval) {
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let fulfill;
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const result = new Promise(x => fulfill = x);
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onTimeout();
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return result;
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function onTimeout() {
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if (timedOut) {
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fulfill();
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return;
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}
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const success = predicate.apply(null, args);
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if (success)
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fulfill(success);
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else
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setTimeout(onTimeout, pollInterval);
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}
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}
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}
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module.exports = {FrameManager, Frame};
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