Support for HTTPS proxy server (with mTLS against the proxy)

[Ofir]

Hi,

Did anyone have luck with configuring gRPC to use an HTTPS proxy?

Was wondering whether I need to hack a custom dialer in my grpc-go implementation and I'm somewhat of a novice to this whole thingy.

I've got a setup where you have:
(gRPC) client -> mTLS HTTPS forward proxy -> (gRPC server) public internet

The client presents client certificates to the proxy server over HTTPS and then connects to the final destination, no deep packet inspection / TLS inspection / SSL bumping.

I saw these GH PRs but I bet neither got merged yet:
https://github.com/grpc/grpc/issues/35372
https://github.com/grpc/grpc-go/issues/6846
https://github.com/grpc/grpc-java/issues/10453

Thanks.