Puppeteer

问题 While using Puppeteer or Chrome DevTools APIs, you can get a value for resourceType (on Request object in Puppeteer and on Page object in Chrome DevTools). How does this value is establish by the "rendering engine" (as called in the documentation)? Possible values being: Document , Stylesheet , Image , Media , Font , Script , TextTrack , XHR , Fetch , EventSource , WebSocket , Manifest , Other API documentation: Puppeteer API and Chrome DevTools API Similar question on stackoverflow: Is There

问题 I'm unable to install puppeteer as a project dependency, and I've tried re-installing node. Anyone have an idea on how to fix this? Running Ubuntu 17.10 x64 sudo apt-get purge nodejs; curl -sL https://deb.nodesource.com/setup_8.x | sudo -E bash -; apt-get install -y nodejs; sudo npm install -g n; sudo n stable; Node versions: $ node -v v9.4.0 $ npm -v 5.6.0 I try to install: root@server:/var/www/html# npm install --save puppeteer Error message: > puppeteer@1.1.0 install /var/www/html/node

问题 I have a node script which converts a webpage into a PDF document. The user enters some content and PHP builds a HTML page, which then is used in a node script (that runs Puppeteer, using a slightly modified version of an example script) to convert it to PDF. But when I exec in PHP the command to run the node script, it fails with the following error: (node:14832) UnhandledPromiseRejectionWarning: Error: Failed to launch chrome! [0424/165455.239499:ERROR:icu_util.cc(133)] Invalid file

问题 I have a very simple Puppeteer script that uses exposeFunction() to run something inside headless Chrome. (async function(){ var log = console.log.bind(console), puppeteer = require('puppeteer'); const browser = await puppeteer.launch(); const page = await browser.newPage(); var functionToInject = function(){ return window.navigator.appName; } await page.exposeFunction('functionToInject', functionToInject); var data = await page.evaluate(async function(){ console.log('woo I run inside a

问题 My question is simple but i don't understand if it's possible and in this case how it's possible ? I would like to use the puppeteer library in a angular application. https://www.npmjs.com/package/puppeteer it's the npm installation. But i don't understand how i can use it. For example i just want to make this script : const puppeteer = require('puppeteer'); (async () => { const browser = await puppeteer.launch(); const page = await browser.newPage(); await page.goto('https://example.com');

问题 so i open a website , waith for all redirects to be done capture captcha image and send it vie nodejs to a user an recive the typed captcha const browser = await puppeteer.launch({headless: false}); const page = await browser.newPage(); await page.goto('http://localhost/p1.php' ); await page.waitForNavigation(); const captcha_image = await page.$eval('#security', e => e.getAttribute('src')); io.emit('send_captcha_to_client' , {text : captcha_image }); var captcha = await captchaPromise; after

问题 Using Puppeteer, I would like to get all the elements on a page with a particular class name and then loop through and click each one Using jQuery I can achieve this with var elements = $("a.showGoals").toArray(); for (i = 0; i < elements.length; i++) { $(elements[i]).click(); } How would I achieve this using Puppeteer? Update Tried out Chridam's answer below but I couldn't get to work (though answer helpful so thanks due there) so I tried the following and this works await page.evaluate(() =

问题 Hi im a bit new in web scraping using Puppeter im currently im facing the next problem: in the site where im trying to extract information i have a bootstrap table with a typical js pagination like the examples from: https://getbootstrap.com/docs/4.1/components/pagination/ when i check the page html with Chrome inspector all i can see is 2 and when i check link location i see https://webpage.com/works# how i can know how many pages are in total? and how i can click them? i don't understand

问题 using Puppeteer I'm able to navigate to a certain video src URL, and the MP4 (using a custom build of chronium) plays fine. NOW: I want to be able to get the video data that's playing and send it to some kind of buffer in node.js that can be saved as a file or sent to a client via a websocket or sent as a response etc.... but I'm not sure how to do it, all I have is the video playing. I'm not able to just send the URL over to node.js, because in order to view the video file you have to go

问题 Is there any puppeteer api/workaround to get total bytes sent / received in a page. For example below code gives me all timing stats. await page.evaluate(() => JSON.stringify(window.performance.timing)) Similarly is there any way or work around I can get total bytes / sent received in a page. Byte counts should include HTTP, Websocket, XHR request / response headers, body all. 回答1: By using const perfEntries = JSON.parse( await page.evaluate(() => JSON.stringify(performance.getEntries())) );