Makes sense ... most languages have solid libraries to work with HTTP, which can eliminate the need for a third-party standalone proxy. A DIY solution sounds nice as it could be customized to meet any specific (and/or crazy :-p) features required.

Here's a C# project in the same vein: [1].

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1: https://github.com/microsoft/reverse-proxy/tree/main/samples...

Great writeup. Do you plan to update your Kamal handbook to version 2?

I don't want to speak for the author but I recently bought the book and he told me he will be updating it. I look forward to it as well.

Thanks for answering :D Yes, Kamal Handbook will get a second edition addressing Kamal 2. I am already going through the changes.

Related discussion: https://news.ycombinator.com/item?id=41608350

I'm currently using Traefik for compression (gzip, brotli, …) does Kamal-Proxy handle that as well or do Rails apps handle compression somewhere else?

Caching and X-Sendfile is handled by https://github.com/basecamp/thruster

Rack::Deflater can be then used directly in Rack apps with Puma

Does it support http/3?

They use Go's net/http package which has support for HTTP 2 but I think it lacks support for HTTP 3? Maybe someone can correct me.