puppeteer/lib/Page.js

1298 lines
39 KiB
JavaScript

/**
* Copyright 2017 Google Inc. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
const fs = require('fs');
const EventEmitter = require('events');
const mime = require('mime');
const {Events} = require('./Events');
const {Connection} = require('./Connection');
const {NetworkManager} = require('./NetworkManager');
const {Dialog} = require('./Dialog');
const {EmulationManager} = require('./EmulationManager');
const {FrameManager} = require('./FrameManager');
const {Keyboard, Mouse, Touchscreen} = require('./Input');
const Tracing = require('./Tracing');
const {helper, debugError, assert} = require('./helper');
const {Coverage} = require('./Coverage');
const {Worker} = require('./Worker');
const {createJSHandle} = require('./JSHandle');
const {Accessibility} = require('./Accessibility');
const {TimeoutSettings} = require('./TimeoutSettings');
const writeFileAsync = helper.promisify(fs.writeFile);
class Page extends EventEmitter {
/**
* @param {!Puppeteer.CDPSession} client
* @param {!Puppeteer.Target} target
* @param {boolean} ignoreHTTPSErrors
* @param {?Puppeteer.Viewport} defaultViewport
* @param {!Puppeteer.TaskQueue} screenshotTaskQueue
* @return {!Promise<!Page>}
*/
static async create(client, target, ignoreHTTPSErrors, defaultViewport, screenshotTaskQueue) {
await client.send('Page.enable');
const {frameTree} = await client.send('Page.getFrameTree');
const page = new Page(client, target, frameTree, ignoreHTTPSErrors, screenshotTaskQueue);
await Promise.all([
client.send('Target.setAutoAttach', {autoAttach: true, waitForDebuggerOnStart: false, flatten: true}),
client.send('Page.setLifecycleEventsEnabled', { enabled: true }),
client.send('Network.enable', {}),
client.send('Runtime.enable', {}).then(() => page._frameManager.ensureSecondaryDOMWorld()),
client.send('Security.enable', {}),
client.send('Performance.enable', {}),
client.send('Log.enable', {}),
]);
if (ignoreHTTPSErrors)
await client.send('Security.setOverrideCertificateErrors', {override: true});
// Initialize default page size.
if (defaultViewport)
await page.setViewport(defaultViewport);
return page;
}
/**
* @param {!Puppeteer.CDPSession} client
* @param {!Puppeteer.Target} target
* @param {!Protocol.Page.FrameTree} frameTree
* @param {boolean} ignoreHTTPSErrors
* @param {!Puppeteer.TaskQueue} screenshotTaskQueue
*/
constructor(client, target, frameTree, ignoreHTTPSErrors, screenshotTaskQueue) {
super();
this._closed = false;
this._client = client;
this._target = target;
this._keyboard = new Keyboard(client);
this._mouse = new Mouse(client, this._keyboard);
this._timeoutSettings = new TimeoutSettings();
this._touchscreen = new Touchscreen(client, this._keyboard);
this._accessibility = new Accessibility(client);
this._networkManager = new NetworkManager(client);
/** @type {!FrameManager} */
this._frameManager = new FrameManager(client, frameTree, this, this._networkManager, this._timeoutSettings);
this._networkManager.setFrameManager(this._frameManager);
this._emulationManager = new EmulationManager(client);
this._tracing = new Tracing(client);
/** @type {!Map<string, Function>} */
this._pageBindings = new Map();
this._ignoreHTTPSErrors = ignoreHTTPSErrors;
this._coverage = new Coverage(client);
this._javascriptEnabled = true;
/** @type {?Puppeteer.Viewport} */
this._viewport = null;
this._screenshotTaskQueue = screenshotTaskQueue;
/** @type {!Map<string, Worker>} */
this._workers = new Map();
client.on('Target.attachedToTarget', event => {
if (event.targetInfo.type !== 'worker') {
// If we don't detach from service workers, they will never die.
client.send('Target.detachFromTarget', {
sessionId: event.sessionId
}).catch(debugError);
return;
}
const session = Connection.fromSession(client).session(event.sessionId);
const worker = new Worker(session, event.targetInfo.url, this._addConsoleMessage.bind(this), this._handleException.bind(this));
this._workers.set(event.sessionId, worker);
this.emit(Events.Page.WorkerCreated, worker);
});
client.on('Target.detachedFromTarget', event => {
const worker = this._workers.get(event.sessionId);
if (!worker)
return;
this.emit(Events.Page.WorkerDestroyed, worker);
this._workers.delete(event.sessionId);
});
this._frameManager.on(Events.FrameManager.FrameAttached, event => this.emit(Events.Page.FrameAttached, event));
this._frameManager.on(Events.FrameManager.FrameDetached, event => this.emit(Events.Page.FrameDetached, event));
this._frameManager.on(Events.FrameManager.FrameNavigated, event => this.emit(Events.Page.FrameNavigated, event));
this._networkManager.on(Events.NetworkManager.Request, event => this.emit(Events.Page.Request, event));
this._networkManager.on(Events.NetworkManager.Response, event => this.emit(Events.Page.Response, event));
this._networkManager.on(Events.NetworkManager.RequestFailed, event => this.emit(Events.Page.RequestFailed, event));
this._networkManager.on(Events.NetworkManager.RequestFinished, event => this.emit(Events.Page.RequestFinished, event));
client.on('Page.domContentEventFired', event => this.emit(Events.Page.DOMContentLoaded));
client.on('Page.loadEventFired', event => this.emit(Events.Page.Load));
client.on('Runtime.consoleAPICalled', event => this._onConsoleAPI(event));
client.on('Runtime.bindingCalled', event => this._onBindingCalled(event));
client.on('Page.javascriptDialogOpening', event => this._onDialog(event));
client.on('Runtime.exceptionThrown', exception => this._handleException(exception.exceptionDetails));
client.on('Security.certificateError', event => this._onCertificateError(event));
client.on('Inspector.targetCrashed', event => this._onTargetCrashed());
client.on('Performance.metrics', event => this._emitMetrics(event));
client.on('Log.entryAdded', event => this._onLogEntryAdded(event));
this._target._isClosedPromise.then(() => {
this.emit(Events.Page.Close);
this._closed = true;
});
}
/**
* @param {!{longitude: number, latitude: number, accuracy: (number|undefined)}} options
*/
async setGeolocation(options) {
const { longitude, latitude, accuracy = 0} = options;
if (longitude < -180 || longitude > 180)
throw new Error(`Invalid longitude "${longitude}": precondition -180 <= LONGITUDE <= 180 failed.`);
if (latitude < -90 || latitude > 90)
throw new Error(`Invalid latitude "${latitude}": precondition -90 <= LATITUDE <= 90 failed.`);
if (accuracy < 0)
throw new Error(`Invalid accuracy "${accuracy}": precondition 0 <= ACCURACY failed.`);
await this._client.send('Emulation.setGeolocationOverride', {longitude, latitude, accuracy});
}
/**
* @return {!Puppeteer.Target}
*/
target() {
return this._target;
}
/**
* @return {!Puppeteer.Browser}
*/
browser() {
return this._target.browser();
}
/**
* @return {!Puppeteer.BrowserContext}
*/
browserContext() {
return this._target.browserContext();
}
_onTargetCrashed() {
this.emit('error', new Error('Page crashed!'));
}
/**
* @param {!Protocol.Log.entryAddedPayload} event
*/
_onLogEntryAdded(event) {
const {level, text, args, source, url, lineNumber} = event.entry;
if (args)
args.map(arg => helper.releaseObject(this._client, arg));
if (source !== 'worker')
this.emit(Events.Page.Console, new ConsoleMessage(level, text, [], {url, lineNumber}));
}
/**
* @return {!Puppeteer.Frame}
*/
mainFrame() {
return this._frameManager.mainFrame();
}
/**
* @return {!Keyboard}
*/
get keyboard() {
return this._keyboard;
}
/**
* @return {!Touchscreen}
*/
get touchscreen() {
return this._touchscreen;
}
/**
* @return {!Coverage}
*/
get coverage() {
return this._coverage;
}
/**
* @return {!Tracing}
*/
get tracing() {
return this._tracing;
}
/**
* @return {!Accessibility}
*/
get accessibility() {
return this._accessibility;
}
/**
* @return {!Array<Puppeteer.Frame>}
*/
frames() {
return this._frameManager.frames();
}
/**
* @return {!Array<!Worker>}
*/
workers() {
return Array.from(this._workers.values());
}
/**
* @param {boolean} value
*/
async setRequestInterception(value) {
return this._networkManager.setRequestInterception(value);
}
/**
* @param {boolean} enabled
*/
setOfflineMode(enabled) {
return this._networkManager.setOfflineMode(enabled);
}
/**
* @param {number} timeout
*/
setDefaultNavigationTimeout(timeout) {
this._timeoutSettings.setDefaultNavigationTimeout(timeout);
}
/**
* @param {number} timeout
*/
setDefaultTimeout(timeout) {
this._timeoutSettings.setDefaultTimeout(timeout);
}
/**
* @param {!Protocol.Security.certificateErrorPayload} event
*/
_onCertificateError(event) {
if (!this._ignoreHTTPSErrors)
return;
this._client.send('Security.handleCertificateError', {
eventId: event.eventId,
action: 'continue'
}).catch(debugError);
}
/**
* @param {string} selector
* @return {!Promise<?Puppeteer.ElementHandle>}
*/
async $(selector) {
return this.mainFrame().$(selector);
}
/**
* @param {Function|string} pageFunction
* @param {!Array<*>} args
* @return {!Promise<!Puppeteer.JSHandle>}
*/
async evaluateHandle(pageFunction, ...args) {
const context = await this.mainFrame().executionContext();
return context.evaluateHandle(pageFunction, ...args);
}
/**
* @param {!Puppeteer.JSHandle} prototypeHandle
* @return {!Promise<!Puppeteer.JSHandle>}
*/
async queryObjects(prototypeHandle) {
const context = await this.mainFrame().executionContext();
return context.queryObjects(prototypeHandle);
}
/**
* @param {string} selector
* @param {Function|string} pageFunction
* @param {!Array<*>} args
* @return {!Promise<(!Object|undefined)>}
*/
async $eval(selector, pageFunction, ...args) {
return this.mainFrame().$eval(selector, pageFunction, ...args);
}
/**
* @param {string} selector
* @param {Function|string} pageFunction
* @param {!Array<*>} args
* @return {!Promise<(!Object|undefined)>}
*/
async $$eval(selector, pageFunction, ...args) {
return this.mainFrame().$$eval(selector, pageFunction, ...args);
}
/**
* @param {string} selector
* @return {!Promise<!Array<!Puppeteer.ElementHandle>>}
*/
async $$(selector) {
return this.mainFrame().$$(selector);
}
/**
* @param {string} expression
* @return {!Promise<!Array<!Puppeteer.ElementHandle>>}
*/
async $x(expression) {
return this.mainFrame().$x(expression);
}
/**
* @param {!Array<string>} urls
* @return {!Promise<!Array<Network.Cookie>>}
*/
async cookies(...urls) {
return (await this._client.send('Network.getCookies', {
urls: urls.length ? urls : [this.url()]
})).cookies;
}
/**
* @param {Array<Protocol.Network.deleteCookiesParameters>} cookies
*/
async deleteCookie(...cookies) {
const pageURL = this.url();
for (const cookie of cookies) {
const item = Object.assign({}, cookie);
if (!cookie.url && pageURL.startsWith('http'))
item.url = pageURL;
await this._client.send('Network.deleteCookies', item);
}
}
/**
* @param {Array<Network.CookieParam>} cookies
*/
async setCookie(...cookies) {
const pageURL = this.url();
const startsWithHTTP = pageURL.startsWith('http');
const items = cookies.map(cookie => {
const item = Object.assign({}, cookie);
if (!item.url && startsWithHTTP)
item.url = pageURL;
assert(
item.url !== 'about:blank',
`Blank page can not have cookie "${item.name}"`
);
assert(
!String.prototype.startsWith.call(item.url || '', 'data:'),
`Data URL page can not have cookie "${item.name}"`
);
return item;
});
await this.deleteCookie(...items);
if (items.length)
await this._client.send('Network.setCookies', { cookies: items });
}
/**
* @param {!{url?: string, path?: string, content?: string, type?: string}} options
* @return {!Promise<!Puppeteer.ElementHandle>}
*/
async addScriptTag(options) {
return this.mainFrame().addScriptTag(options);
}
/**
* @param {!{url?: string, path?: string, content?: string}} options
* @return {!Promise<!Puppeteer.ElementHandle>}
*/
async addStyleTag(options) {
return this.mainFrame().addStyleTag(options);
}
/**
* @param {string} name
* @param {Function} puppeteerFunction
*/
async exposeFunction(name, puppeteerFunction) {
if (this._pageBindings.has(name))
throw new Error(`Failed to add page binding with name ${name}: window['${name}'] already exists!`);
this._pageBindings.set(name, puppeteerFunction);
const expression = helper.evaluationString(addPageBinding, name);
await this._client.send('Runtime.addBinding', {name: name});
await this._client.send('Page.addScriptToEvaluateOnNewDocument', {source: expression});
await Promise.all(this.frames().map(frame => frame.evaluate(expression).catch(debugError)));
function addPageBinding(bindingName) {
const binding = window[bindingName];
window[bindingName] = async(...args) => {
const me = window[bindingName];
let callbacks = me['callbacks'];
if (!callbacks) {
callbacks = new Map();
me['callbacks'] = callbacks;
}
const seq = (me['lastSeq'] || 0) + 1;
me['lastSeq'] = seq;
const promise = new Promise((resolve, reject) => callbacks.set(seq, {resolve, reject}));
binding(JSON.stringify({name: bindingName, seq, args}));
return promise;
};
}
}
/**
* @param {?{username: string, password: string}} credentials
*/
async authenticate(credentials) {
return this._networkManager.authenticate(credentials);
}
/**
* @param {!Object<string, string>} headers
*/
async setExtraHTTPHeaders(headers) {
return this._networkManager.setExtraHTTPHeaders(headers);
}
/**
* @param {string} userAgent
*/
async setUserAgent(userAgent) {
return this._networkManager.setUserAgent(userAgent);
}
/**
* @return {!Promise<!Metrics>}
*/
async metrics() {
const response = await this._client.send('Performance.getMetrics');
return this._buildMetricsObject(response.metrics);
}
/**
* @param {!Protocol.Performance.metricsPayload} event
*/
_emitMetrics(event) {
this.emit(Events.Page.Metrics, {
title: event.title,
metrics: this._buildMetricsObject(event.metrics)
});
}
/**
* @param {?Array<!Protocol.Performance.Metric>} metrics
* @return {!Metrics}
*/
_buildMetricsObject(metrics) {
const result = {};
for (const metric of metrics || []) {
if (supportedMetrics.has(metric.name))
result[metric.name] = metric.value;
}
return result;
}
/**
* @param {!Protocol.Runtime.ExceptionDetails} exceptionDetails
*/
_handleException(exceptionDetails) {
const message = helper.getExceptionMessage(exceptionDetails);
const err = new Error(message);
err.stack = ''; // Don't report clientside error with a node stack attached
this.emit(Events.Page.PageError, err);
}
/**
* @param {!Protocol.Runtime.consoleAPICalledPayload} event
*/
async _onConsoleAPI(event) {
if (event.executionContextId === 0) {
// DevTools protocol stores the last 1000 console messages. These
// messages are always reported even for removed execution contexts. In
// this case, they are marked with executionContextId = 0 and are
// reported upon enabling Runtime agent.
//
// Ignore these messages since:
// - there's no execution context we can use to operate with message
// arguments
// - these messages are reported before Puppeteer clients can subscribe
// to the 'console'
// page event.
//
// @see https://github.com/GoogleChrome/puppeteer/issues/3865
return;
}
const context = this._frameManager.executionContextById(event.executionContextId);
const values = event.args.map(arg => createJSHandle(context, arg));
this._addConsoleMessage(event.type, values, event.stackTrace);
}
/**
* @param {!Protocol.Runtime.bindingCalledPayload} event
*/
async _onBindingCalled(event) {
const {name, seq, args} = JSON.parse(event.payload);
let expression = null;
try {
const result = await this._pageBindings.get(name)(...args);
expression = helper.evaluationString(deliverResult, name, seq, result);
} catch (error) {
if (error instanceof Error)
expression = helper.evaluationString(deliverError, name, seq, error.message, error.stack);
else
expression = helper.evaluationString(deliverErrorValue, name, seq, error);
}
this._client.send('Runtime.evaluate', { expression, contextId: event.executionContextId }).catch(debugError);
/**
* @param {string} name
* @param {number} seq
* @param {*} result
*/
function deliverResult(name, seq, result) {
window[name]['callbacks'].get(seq).resolve(result);
window[name]['callbacks'].delete(seq);
}
/**
* @param {string} name
* @param {number} seq
* @param {string} message
* @param {string} stack
*/
function deliverError(name, seq, message, stack) {
const error = new Error(message);
error.stack = stack;
window[name]['callbacks'].get(seq).reject(error);
window[name]['callbacks'].delete(seq);
}
/**
* @param {string} name
* @param {number} seq
* @param {*} value
*/
function deliverErrorValue(name, seq, value) {
window[name]['callbacks'].get(seq).reject(value);
window[name]['callbacks'].delete(seq);
}
}
/**
* @param {string} type
* @param {!Array<!Puppeteer.JSHandle>} args
* @param {Protocol.Runtime.StackTrace=} stackTrace
*/
_addConsoleMessage(type, args, stackTrace) {
if (!this.listenerCount(Events.Page.Console)) {
args.forEach(arg => arg.dispose());
return;
}
const textTokens = [];
for (const arg of args) {
const remoteObject = arg._remoteObject;
if (remoteObject.objectId)
textTokens.push(arg.toString());
else
textTokens.push(helper.valueFromRemoteObject(remoteObject));
}
const location = stackTrace && stackTrace.callFrames.length ? {
url: stackTrace.callFrames[0].url,
lineNumber: stackTrace.callFrames[0].lineNumber,
columnNumber: stackTrace.callFrames[0].columnNumber,
} : {};
const message = new ConsoleMessage(type, textTokens.join(' '), args, location);
this.emit(Events.Page.Console, message);
}
_onDialog(event) {
let dialogType = null;
if (event.type === 'alert')
dialogType = Dialog.Type.Alert;
else if (event.type === 'confirm')
dialogType = Dialog.Type.Confirm;
else if (event.type === 'prompt')
dialogType = Dialog.Type.Prompt;
else if (event.type === 'beforeunload')
dialogType = Dialog.Type.BeforeUnload;
assert(dialogType, 'Unknown javascript dialog type: ' + event.type);
const dialog = new Dialog(this._client, dialogType, event.message, event.defaultPrompt);
this.emit(Events.Page.Dialog, dialog);
}
/**
* @return {!string}
*/
url() {
return this.mainFrame().url();
}
/**
* @return {!Promise<string>}
*/
async content() {
return await this._frameManager.mainFrame().content();
}
/**
* @param {string} html
* @param {!{timeout?: number, waitUntil?: string|!Array<string>}=} options
*/
async setContent(html, options) {
await this._frameManager.mainFrame().setContent(html, options);
}
/**
* @param {string} url
* @param {!{referer?: string, timeout?: number, waitUntil?: string|!Array<string>}=} options
* @return {!Promise<?Puppeteer.Response>}
*/
async goto(url, options) {
return await this._frameManager.mainFrame().goto(url, options);
}
/**
* @param {!{timeout?: number, waitUntil?: string|!Array<string>}=} options
* @return {!Promise<?Puppeteer.Response>}
*/
async reload(options) {
const [response] = await Promise.all([
this.waitForNavigation(options),
this._client.send('Page.reload')
]);
return response;
}
/**
* @param {!{timeout?: number, waitUntil?: string|!Array<string>}=} options
* @return {!Promise<?Puppeteer.Response>}
*/
async waitForNavigation(options = {}) {
return await this._frameManager.mainFrame().waitForNavigation(options);
}
/**
* @param {(string|Function)} urlOrPredicate
* @param {!{timeout?: number}=} options
* @return {!Promise<!Puppeteer.Request>}
*/
async waitForRequest(urlOrPredicate, options = {}) {
const {
timeout = this._timeoutSettings.timeout(),
} = options;
return helper.waitForEvent(this._networkManager, Events.NetworkManager.Request, request => {
if (helper.isString(urlOrPredicate))
return (urlOrPredicate === request.url());
if (typeof urlOrPredicate === 'function')
return !!(urlOrPredicate(request));
return false;
}, timeout);
}
/**
* @param {(string|Function)} urlOrPredicate
* @param {!{timeout?: number}=} options
* @return {!Promise<!Puppeteer.Response>}
*/
async waitForResponse(urlOrPredicate, options = {}) {
const {
timeout = this._timeoutSettings.timeout(),
} = options;
return helper.waitForEvent(this._networkManager, Events.NetworkManager.Response, response => {
if (helper.isString(urlOrPredicate))
return (urlOrPredicate === response.url());
if (typeof urlOrPredicate === 'function')
return !!(urlOrPredicate(response));
return false;
}, timeout);
}
/**
* @param {!{timeout?: number, waitUntil?: string|!Array<string>}=} options
* @return {!Promise<?Puppeteer.Response>}
*/
async goBack(options) {
return this._go(-1, options);
}
/**
* @param {!{timeout?: number, waitUntil?: string|!Array<string>}=} options
* @return {!Promise<?Puppeteer.Response>}
*/
async goForward(options) {
return this._go(+1, options);
}
/**
* @param {!{timeout?: number, waitUntil?: string|!Array<string>}=} options
* @return {!Promise<?Puppeteer.Response>}
*/
async _go(delta, options) {
const history = await this._client.send('Page.getNavigationHistory');
const entry = history.entries[history.currentIndex + delta];
if (!entry)
return null;
const [response] = await Promise.all([
this.waitForNavigation(options),
this._client.send('Page.navigateToHistoryEntry', {entryId: entry.id}),
]);
return response;
}
async bringToFront() {
await this._client.send('Page.bringToFront');
}
/**
* @param {!{viewport: !Puppeteer.Viewport, userAgent: string}} options
*/
async emulate(options) {
await Promise.all([
this.setViewport(options.viewport),
this.setUserAgent(options.userAgent)
]);
}
/**
* @param {boolean} enabled
*/
async setJavaScriptEnabled(enabled) {
if (this._javascriptEnabled === enabled)
return;
this._javascriptEnabled = enabled;
await this._client.send('Emulation.setScriptExecutionDisabled', { value: !enabled });
}
/**
* @param {boolean} enabled
*/
async setBypassCSP(enabled) {
await this._client.send('Page.setBypassCSP', { enabled });
}
/**
* @param {?string} mediaType
*/
async emulateMedia(mediaType) {
assert(mediaType === 'screen' || mediaType === 'print' || mediaType === null, 'Unsupported media type: ' + mediaType);
await this._client.send('Emulation.setEmulatedMedia', {media: mediaType || ''});
}
/**
* @param {!Puppeteer.Viewport} viewport
*/
async setViewport(viewport) {
const needsReload = await this._emulationManager.emulateViewport(viewport);
this._viewport = viewport;
if (needsReload)
await this.reload();
}
/**
* @return {?Puppeteer.Viewport}
*/
viewport() {
return this._viewport;
}
/**
* @param {Function|string} pageFunction
* @param {!Array<*>} args
* @return {!Promise<*>}
*/
async evaluate(pageFunction, ...args) {
return this._frameManager.mainFrame().evaluate(pageFunction, ...args);
}
/**
* @param {Function|string} pageFunction
* @param {!Array<*>} args
*/
async evaluateOnNewDocument(pageFunction, ...args) {
const source = helper.evaluationString(pageFunction, ...args);
await this._client.send('Page.addScriptToEvaluateOnNewDocument', { source });
}
/**
* @param {boolean} enabled
*/
async setCacheEnabled(enabled = true) {
await this._client.send('Network.setCacheDisabled', {cacheDisabled: !enabled});
}
/**
* @param {!ScreenshotOptions=} options
* @return {!Promise<!Buffer|!String>}
*/
async screenshot(options = {}) {
let screenshotType = null;
// options.type takes precedence over inferring the type from options.path
// because it may be a 0-length file with no extension created beforehand (i.e. as a temp file).
if (options.type) {
assert(options.type === 'png' || options.type === 'jpeg', 'Unknown options.type value: ' + options.type);
screenshotType = options.type;
} else if (options.path) {
const mimeType = mime.getType(options.path);
if (mimeType === 'image/png')
screenshotType = 'png';
else if (mimeType === 'image/jpeg')
screenshotType = 'jpeg';
assert(screenshotType, 'Unsupported screenshot mime type: ' + mimeType);
}
if (!screenshotType)
screenshotType = 'png';
if (options.quality) {
assert(screenshotType === 'jpeg', 'options.quality is unsupported for the ' + screenshotType + ' screenshots');
assert(typeof options.quality === 'number', 'Expected options.quality to be a number but found ' + (typeof options.quality));
assert(Number.isInteger(options.quality), 'Expected options.quality to be an integer');
assert(options.quality >= 0 && options.quality <= 100, 'Expected options.quality to be between 0 and 100 (inclusive), got ' + options.quality);
}
assert(!options.clip || !options.fullPage, 'options.clip and options.fullPage are exclusive');
if (options.clip) {
assert(typeof options.clip.x === 'number', 'Expected options.clip.x to be a number but found ' + (typeof options.clip.x));
assert(typeof options.clip.y === 'number', 'Expected options.clip.y to be a number but found ' + (typeof options.clip.y));
assert(typeof options.clip.width === 'number', 'Expected options.clip.width to be a number but found ' + (typeof options.clip.width));
assert(typeof options.clip.height === 'number', 'Expected options.clip.height to be a number but found ' + (typeof options.clip.height));
assert(options.clip.width !== 0, 'Expected options.clip.width not to be 0.');
assert(options.clip.height !== 0, 'Expected options.clip.width not to be 0.');
}
return this._screenshotTaskQueue.postTask(this._screenshotTask.bind(this, screenshotType, options));
}
/**
* @param {"png"|"jpeg"} format
* @param {!ScreenshotOptions=} options
* @return {!Promise<!Buffer|!String>}
*/
async _screenshotTask(format, options) {
await this._client.send('Target.activateTarget', {targetId: this._target._targetId});
let clip = options.clip ? processClip(options.clip) : undefined;
if (options.fullPage) {
const metrics = await this._client.send('Page.getLayoutMetrics');
const width = Math.ceil(metrics.contentSize.width);
const height = Math.ceil(metrics.contentSize.height);
// Overwrite clip for full page at all times.
clip = { x: 0, y: 0, width, height, scale: 1 };
const {
isMobile = false,
deviceScaleFactor = 1,
isLandscape = false
} = this._viewport || {};
/** @type {!Protocol.Emulation.ScreenOrientation} */
const screenOrientation = isLandscape ? { angle: 90, type: 'landscapePrimary' } : { angle: 0, type: 'portraitPrimary' };
await this._client.send('Emulation.setDeviceMetricsOverride', { mobile: isMobile, width, height, deviceScaleFactor, screenOrientation });
}
const shouldSetDefaultBackground = options.omitBackground && format === 'png';
if (shouldSetDefaultBackground)
await this._client.send('Emulation.setDefaultBackgroundColorOverride', { color: { r: 0, g: 0, b: 0, a: 0 } });
const result = await this._client.send('Page.captureScreenshot', { format, quality: options.quality, clip });
if (shouldSetDefaultBackground)
await this._client.send('Emulation.setDefaultBackgroundColorOverride');
if (options.fullPage && this._viewport)
await this.setViewport(this._viewport);
const buffer = options.encoding === 'base64' ? result.data : Buffer.from(result.data, 'base64');
if (options.path)
await writeFileAsync(options.path, buffer);
return buffer;
function processClip(clip) {
const x = Math.round(clip.x);
const y = Math.round(clip.y);
const width = Math.round(clip.width + clip.x - x);
const height = Math.round(clip.height + clip.y - y);
return {x, y, width, height, scale: 1};
}
}
/**
* @param {!PDFOptions=} options
* @return {!Promise<!Buffer>}
*/
async pdf(options = {}) {
const {
scale = 1,
displayHeaderFooter = false,
headerTemplate = '',
footerTemplate = '',
printBackground = false,
landscape = false,
pageRanges = '',
preferCSSPageSize = false,
margin = {},
path = null
} = options;
let paperWidth = 8.5;
let paperHeight = 11;
if (options.format) {
const format = Page.PaperFormats[options.format.toLowerCase()];
assert(format, 'Unknown paper format: ' + options.format);
paperWidth = format.width;
paperHeight = format.height;
} else {
paperWidth = convertPrintParameterToInches(options.width) || paperWidth;
paperHeight = convertPrintParameterToInches(options.height) || paperHeight;
}
const marginTop = convertPrintParameterToInches(margin.top) || 0;
const marginLeft = convertPrintParameterToInches(margin.left) || 0;
const marginBottom = convertPrintParameterToInches(margin.bottom) || 0;
const marginRight = convertPrintParameterToInches(margin.right) || 0;
const result = await this._client.send('Page.printToPDF', {
landscape,
displayHeaderFooter,
headerTemplate,
footerTemplate,
printBackground,
scale,
paperWidth,
paperHeight,
marginTop,
marginBottom,
marginLeft,
marginRight,
pageRanges,
preferCSSPageSize
});
const buffer = Buffer.from(result.data, 'base64');
if (path !== null)
await writeFileAsync(path, buffer);
return buffer;
}
/**
* @return {!Promise<string>}
*/
async title() {
return this.mainFrame().title();
}
/**
* @param {!{runBeforeUnload: (boolean|undefined)}=} options
*/
async close(options = {runBeforeUnload: undefined}) {
assert(!!this._client._connection, 'Protocol error: Connection closed. Most likely the page has been closed.');
const runBeforeUnload = !!options.runBeforeUnload;
if (runBeforeUnload) {
await this._client.send('Page.close');
} else {
await this._client._connection.send('Target.closeTarget', { targetId: this._target._targetId });
await this._target._isClosedPromise;
}
}
/**
* @return {boolean}
*/
isClosed() {
return this._closed;
}
/**
* @return {!Mouse}
*/
get mouse() {
return this._mouse;
}
/**
* @param {string} selector
* @param {!{delay?: number, button?: "left"|"right"|"middle", clickCount?: number}=} options
*/
click(selector, options = {}) {
return this.mainFrame().click(selector, options);
}
/**
* @param {string} selector
*/
focus(selector) {
return this.mainFrame().focus(selector);
}
/**
* @param {string} selector
*/
hover(selector) {
return this.mainFrame().hover(selector);
}
/**
* @param {string} selector
* @param {!Array<string>} values
* @return {!Promise<!Array<string>>}
*/
select(selector, ...values) {
return this.mainFrame().select(selector, ...values);
}
/**
* @param {string} selector
*/
tap(selector) {
return this.mainFrame().tap(selector);
}
/**
* @param {string} selector
* @param {string} text
* @param {{delay: (number|undefined)}=} options
*/
type(selector, text, options) {
return this.mainFrame().type(selector, text, options);
}
/**
* @param {(string|number|Function)} selectorOrFunctionOrTimeout
* @param {!Object=} options
* @param {!Array<*>} args
* @return {!Promise<!Puppeteer.JSHandle>}
*/
waitFor(selectorOrFunctionOrTimeout, options = {}, ...args) {
return this.mainFrame().waitFor(selectorOrFunctionOrTimeout, options, ...args);
}
/**
* @param {string} selector
* @param {!{visible?: boolean, hidden?: boolean, timeout?: number}=} options
* @return {!Promise<?Puppeteer.ElementHandle>}
*/
waitForSelector(selector, options = {}) {
return this.mainFrame().waitForSelector(selector, options);
}
/**
* @param {string} xpath
* @param {!{visible?: boolean, hidden?: boolean, timeout?: number}=} options
* @return {!Promise<?Puppeteer.ElementHandle>}
*/
waitForXPath(xpath, options = {}) {
return this.mainFrame().waitForXPath(xpath, options);
}
/**
* @param {Function} pageFunction
* @param {!{polling?: string|number, timeout?: number}=} options
* @param {!Array<*>} args
* @return {!Promise<!Puppeteer.JSHandle>}
*/
waitForFunction(pageFunction, options = {}, ...args) {
return this.mainFrame().waitForFunction(pageFunction, options, ...args);
}
}
/**
* @typedef {Object} PDFOptions
* @property {number=} scale
* @property {boolean=} displayHeaderFooter
* @property {string=} headerTemplate
* @property {string=} footerTemplate
* @property {boolean=} printBackground
* @property {boolean=} landscape
* @property {string=} pageRanges
* @property {string=} format
* @property {string|number=} width
* @property {string|number=} height
* @property {boolean=} preferCSSPageSize
* @property {!{top?: string|number, bottom?: string|number, left?: string|number, right?: string|number}=} margin
* @property {string=} path
*/
/**
* @typedef {Object} Metrics
* @property {number=} Timestamp
* @property {number=} Documents
* @property {number=} Frames
* @property {number=} JSEventListeners
* @property {number=} Nodes
* @property {number=} LayoutCount
* @property {number=} RecalcStyleCount
* @property {number=} LayoutDuration
* @property {number=} RecalcStyleDuration
* @property {number=} ScriptDuration
* @property {number=} TaskDuration
* @property {number=} JSHeapUsedSize
* @property {number=} JSHeapTotalSize
*/
/**
* @typedef {Object} ScreenshotOptions
* @property {string=} type
* @property {string=} path
* @property {boolean=} fullPage
* @property {{x: number, y: number, width: number, height: number}=} clip
* @property {number=} quality
* @property {boolean=} omitBackground
* @property {string=} encoding
*/
/** @type {!Set<string>} */
const supportedMetrics = new Set([
'Timestamp',
'Documents',
'Frames',
'JSEventListeners',
'Nodes',
'LayoutCount',
'RecalcStyleCount',
'LayoutDuration',
'RecalcStyleDuration',
'ScriptDuration',
'TaskDuration',
'JSHeapUsedSize',
'JSHeapTotalSize',
]);
/** @enum {!{width: number, height: number}} */
Page.PaperFormats = {
letter: {width: 8.5, height: 11},
legal: {width: 8.5, height: 14},
tabloid: {width: 11, height: 17},
ledger: {width: 17, height: 11},
a0: {width: 33.1, height: 46.8 },
a1: {width: 23.4, height: 33.1 },
a2: {width: 16.5, height: 23.4 },
a3: {width: 11.7, height: 16.5 },
a4: {width: 8.27, height: 11.7 },
a5: {width: 5.83, height: 8.27 },
a6: {width: 4.13, height: 5.83 },
};
const unitToPixels = {
'px': 1,
'in': 96,
'cm': 37.8,
'mm': 3.78
};
/**
* @param {(string|number|undefined)} parameter
* @return {(number|undefined)}
*/
function convertPrintParameterToInches(parameter) {
if (typeof parameter === 'undefined')
return undefined;
let pixels;
if (helper.isNumber(parameter)) {
// Treat numbers as pixel values to be aligned with phantom's paperSize.
pixels = /** @type {number} */ (parameter);
} else if (helper.isString(parameter)) {
const text = /** @type {string} */ (parameter);
let unit = text.substring(text.length - 2).toLowerCase();
let valueText = '';
if (unitToPixels.hasOwnProperty(unit)) {
valueText = text.substring(0, text.length - 2);
} else {
// In case of unknown unit try to parse the whole parameter as number of pixels.
// This is consistent with phantom's paperSize behavior.
unit = 'px';
valueText = text;
}
const value = Number(valueText);
assert(!isNaN(value), 'Failed to parse parameter value: ' + text);
pixels = value * unitToPixels[unit];
} else {
throw new Error('page.pdf() Cannot handle parameter type: ' + (typeof parameter));
}
return pixels / 96;
}
/**
* @typedef {Object} Network.Cookie
* @property {string} name
* @property {string} value
* @property {string} domain
* @property {string} path
* @property {number} expires
* @property {number} size
* @property {boolean} httpOnly
* @property {boolean} secure
* @property {boolean} session
* @property {("Strict"|"Lax")=} sameSite
*/
/**
* @typedef {Object} Network.CookieParam
* @property {string} name
* @property {string} value
* @property {string=} url
* @property {string=} domain
* @property {string=} path
* @property {number=} expires
* @property {boolean=} httpOnly
* @property {boolean=} secure
* @property {("Strict"|"Lax")=} sameSite
*/
/**
* @typedef {Object} ConsoleMessage.Location
* @property {string=} url
* @property {number=} lineNumber
* @property {number=} columnNumber
*/
class ConsoleMessage {
/**
* @param {string} type
* @param {string} text
* @param {!Array<!Puppeteer.JSHandle>} args
* @param {ConsoleMessage.Location} location
*/
constructor(type, text, args, location = {}) {
this._type = type;
this._text = text;
this._args = args;
this._location = location;
}
/**
* @return {string}
*/
type() {
return this._type;
}
/**
* @return {string}
*/
text() {
return this._text;
}
/**
* @return {!Array<!Puppeteer.JSHandle>}
*/
args() {
return this._args;
}
/**
* @return {Object}
*/
location() {
return this._location;
}
}
module.exports = {Page, ConsoleMessage};