Puppeteer file download

Context: issue Make sure all the necessary dependencies are installed. You can run ldd chrome grep not on a Linux machine to check which dependencies are missing. The common ones are provided below. This means that the browser was downloaded but failed to be extracted correctly.

The most common cause is a bug in Node. The bug was fixed in Node. Alternatively, if you cannot upgrade, you could downgrade to Node. In order to protect the host environment from untrusted web content, Chrome uses multiple layers of sandboxing. For this to work properly, the host should be configured first. If there's no good sandbox for Chrome to use, it will crash with the error No usable sandbox!

If you absolutely trust the content you open in Chrome, you can launch Chrome with the --no-sandbox argument:. NOTE : Running without a sandbox is strongly discouraged.

Consider configuring a sandbox instead. User namespace cloning is only supported by modern kernels. Unprivileged user namespaces are generally fine to enable, but in some cases they open up more kernel attack surface for unsandboxed non-root processes to elevate to kernel privileges. Headless browsers do not display a UI, so instead you must use the command line.

You may also configure Puppeteer to run full non-headless Microsoft Edge as well. By default, when you install Puppeteer, the installer downloads a recent version of Chromium , the open-source browser that Microsoft Edge is also built upon. If you have Microsoft Edge installed, you may use puppeteer-core. You may add puppeteer-core to your website or app with one of the following commands.

Run node -v from the command-line to ensure you have a compatible version of Node. You create an instance of the browser, open a page, and then manipulate it with the Puppeteer API. Full-Stack JS Certificate. RisingStack in the JS Community. Privacy Policy. Last updated: September 23, RisingStack's services:. Sign up to our newsletter!

In this article:. RisingStack Engineering. Option 1: Make a Screenshot from the DOM At first sight, this solution seemed to be the simplest, and it turned out to be true, but it has its own limitations. In case you need to log in first to generate a PDF from a protected page, first you need to navigate to the login page, inspect the form elements for ID or name, fill them in, then submit the form: await page. Style Manipulation Puppeteer has a solution for this style manipulation too.

What to do now? If you click on the save button, the PDF will be saved by the browser. Using Puppeteer with Docker I think this is the trickiest part of the implementation — so let me save you a couple of hours of Googling.

Print rules are great if you can keep the print stylesheets simple. Puppeteer : Despite being relatively difficult to get it working on Docker, it provided the best result for our use case, and it was also the easiest to write the code with.

CSS print rules : If your users are educated enough to know how to print to a file and your pages are relatively simple, it can be the most painless solution. Share this post. Share on twitter Twitter. Share on facebook Facebook. The answer is a parallel process. Our CPU cores can run multiple processes at the same time.

Child process is how Node. We can combine the child process module with our Puppeteer script and download files in parallel. We have two files in this solution the first one is main. In this file we initiate our child processes and send the URL of the images we want to download. For each URL a new child thread will be initiated.

In the child. Observe that the download function we have here is identical to our earlier solution. The only difference is the Process. Our main script simultaneously spawns 4 instances of chrome and initiates file download in parallel. I hope the explanations and code examples shared above gave you a better understanding of how to file download works in Puppeteer. There are many ways you can download files with Puppeteer. How to download a file with Puppeteer?

There are different ways to download a file with Puppeteer. Unfortunately, all of the different techniques are not well documented.