Problem Description

I'm trying to debug a HTTP application on a server and need mitmproxy to listen on a HTTPS port. I need features from Nginx so I made nginx proxy_pass to a Unix socket. I don't want to make mitmproxy accessible outside of Nginx.

Proposal

The ability to listen on a unix socket in server modes should be added.

I addition, a feature to get the real IP from X-Real-IP or X-Forwarded-For would be needed!
This is needed for reverse-proxying mitmproxy's reverse proxy without Unix sockets in between too.

The architecture for ProxyMode would need to be changed slightly to accept anything not fitting with to a host string and a port number:

AsyncioServerInstance._start and .listen would also need to be changed to be able to listen on a Unix socket:

Alternatives

I could use socat, but it's error-prone and I still would need the feature to get the real IP.

Additional context

import socket

server = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
server.bind("/tmp/socket_test.sock")