log( "CHILD: url received from parent process", url) Ĭonst browser = await puppeteer. The code snippet below is a simple example of running parallel downloads with Puppeteer.Ĭonst downloadPath = path. □ If you are not familiar with how child process work in Node I highly encourage you to give this article a read. We can combine the child process module with our Puppeteer script and download files in parallel. Child process is how Node.js handles parallel programming. We can fork multiple child_proces in Node. Our CPU cores can run multiple processes at the same time. □ Learn more about the single threaded architecture of node here The implementation of a file downloader is pretty straightforward in this scenario. Therefore if we have to download 10 files each 1 gigabyte in size and each requiring about 3 mins to download then with a single process we will have to wait for 10 x 3 = 30 minutes for the task to finish. Download files in Puppeteer with a click of a button In the fortunate case that the website you want to scrape files from uses buttons, then all you need to do is simulate the click event in Puppeteer. It can only execute one process at a time. You see Node.js in its core is a single-threaded system. However, if you have to download multiple large files things start to get complicated. In this next part, we will dive deep into some of the advanced concepts. How can I install puppeteer for firefox and include it in the code so I can use it?Ĭode not working in chrome because of data url error const url = await page.evaluate(async () => )Ĭonst chrome = await puppeteerChrome.Const browser = await puppeteer. The problem is "npm install puppeteer-firefox" is not working to install puppeteer for firefox. I am trying to open a url and I am getting a data URL error in chrome console so I am moving to firefox console to get around the no data urls opening in the chrome console issue.
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