Feature request: forward proxy for CONNECT request handling

[franchb]

Hi there,

Thank you for this amazing project!

I am currently learning Rust and I am interested in implementing a transparent forward proxy to handle CONNECT requests, similar to how the ngx_http_proxy_connect_module works for nginx, or how the squid proxy functions.

Initially, I attempted to develop this feature with Pingora, but my Rust skills are still developing.

So, I began searching for projects that utilize the Pingora framework and came across this project, which I found small, easy but rather solid.

Would you consider implementing CONNECT functionality for this proxy?

Thank you!

[Aitthi]

Hi @franchb,

Thank you for your feature request and for pointing out the possibility of implementing CONNECT support! 🚀

Since Easy-Proxy is built on Pingora, I’d recommend exploring the PeerOptions struct in Pingora, which provides extensive configuration options for upstream connections. For example, fields like custom_l4 and tcp_fast_open could potentially play a role in handling CONNECT requests.

Here’s a snapshot of the PeerOptions struct in Pingora for reference:

If additional fields or modifications are needed in PeerOptions to fully support CONNECT, you can propose changes upstream in Pingora. Alternatively, if you have specific enhancements for Easy-Proxy itself, feel free to open a PR in this repository—we’d love to review and discuss your ideas!

Let me know if you need guidance on where to start or have further questions. 😊

[Aitthi]

easy-proxy/src/config/backend.rs

Line 42 in 1f7dbf9

.insert::<HttpPeer>(HttpPeer::new(endpoint, false, String::new()))

[Aitthi]

easy-proxy/src/proxy/mod.rs

Line 476 in 1f7dbf9

let peer = match ctx.backend.ext.get::<HttpPeer>() {

[franchb]

Thank you, @Aitthi ! I will try to implement a custom L4 peer, and if it works, I will submit a PR!