Open source HTTP/HTTPS proxy

Question

I'm looking for a multi-platform (Linux / Mac OS X / Windows 7), open source proxy, with following features:

• HTTPS support
• could forward to another remote proxy
• web sockets proxying
• able to add custom HTTP headers on the fly
• FTP proxying (optional)

Privoxy could be fine but it misses web sockets and FTP proxying.

Answer 1

You might want to take a look at mitmproxy

mitmproxy is an interactive man-in-the-middle proxy for HTTP and HTTPS with a console interface.

Features

• Intercept HTTP & HTTPS requests and responses and modify them on the fly

• Save complete HTTP conversations for later replay and analysis

• Replay the client-side of an HTTP conversations

• Replay HTTP responses of a previously recorded server

• TCP proxy

• Reverse proxy mode to forward traffic to a specified server

• Transparent proxy mode on OSX and Linux

• Make scripted changes to HTTP traffic using Python

• SSL/TLS certificates for interception are generated on the fly

Release builds are available at github for multiple platforms: https://github.com/mitmproxy/mitmproxy/releases