Скачать или смотреть Fixing the ECONNREFUSED Error in NodeJS for Chrome Remote Interface on Linux

Discover the solution to the `ECONNREFUSED` error encountered when using NodeJS with Chrome Remote Interface on Linux, ensuring smooth PDF generation from web pages.
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This video is based on the question https://stackoverflow.com/q/64788142/ asked by the user 'James' ( https://stackoverflow.com/u/14430059/ ) and on the answer https://stackoverflow.com/a/64790728/ provided by the user 'James' ( https://stackoverflow.com/u/14430059/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Troubleshooting the ECONNREFUSED Error in NodeJS with Chrome Remote Interface on Linux

When developing applications using NodeJS, you may encounter various errors, one of which is the notorious ECONNREFUSED error. This error can be particularly frustrating when you are trying to run a script that works perfectly on a Windows machine but fails on a Linux environment.

In this guide, we'll delve into the specific ECONNREFUSED error encountered while using chrome-launcher and chrome-remote-interface to save a webpage as a PDF in a CentOS 7 environment. We'll identify the problem you're facing and provide a step-by-step solution.

Understanding the Problem

You have written a script that utilizes the following packages:

chrome-launcher: To launch an instance of Chrome.

chrome-remote-interface: To interact with the Chrome browser.

Despite running fine on your Windows setup, when you attempt to execute the same script on CentOS 7, you are met with the following error in your console:

[[See Video to Reveal this Text or Code Snippet]]

Key Considerations

Both systems are using Chrome v86.

SELinux is disabled on the Linux system.

You've verified that no other applications are occupying the port indicated in the error message.

Solution to the ECONNREFUSED Error

After some investigation, it became apparent that the issue lied within the flags used when launching Chrome with the chrome-launcher. Specifically, adding the --no-sandbox flag resolved the ECONNREFUSED error.

Updated Script

Here’s the modified version of your script that includes the necessary changes:

[[See Video to Reveal this Text or Code Snippet]]

Explanation of Changes

Added --no-sandbox: This flag is essential for running Chrome in certain environments that restrict permissions. This often resolves connectivity issues wherein the application cannot access the local ports.

Conclusion

By implementing the --no-sandbox flag, you should find that your script now runs smoothly on CentOS 7 without throwing the ECONNREFUSED error. If you're still facing issues or if you need alternative methods for generating PDFs or scaling, feel free to explore other libraries or approaches.

Happy coding, and may your PDFs print without a hitch!