Modifying Chromium Source Code to Replace DevTools HTTP Handler with Redis Pub/Sub for Browser Automation
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Summary
The article describes a technical solution for improving browser automation by modifying Chromium's source code to replace the traditional DevTools HTTP handler with a Redis Pub/Sub system. This addresses the latency issue where Chromium's Remote Debugging Server takes time to start, forcing developers to repeatedly poll for availability. The author explains how they performed 'surgery' on Chromium's source code to create a more efficient architecture where browser sessions can be spun up in large numbers for automation tasks across various websites.
Key quotes
· 5 pulledThe traditional approach is to run Chromium inside containers and expose a DevTools endpoint using the --remote-debugging flag.
The main challenge with this setup is that the Chromium Remote Debugging Server don't become available instantly, it takes time for the browser to start.
This forces you to repeatedly poll for availability.
Replacing DevTools' HTTP Handler With Redis Pub/Sub
While working at previous engagement, we frequently needed to spin up large numbers of browser sessions to automate tasks across various websites.
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