Proxyfor

A lightweight proxy for monitoring HTTP, HTTPS, and WebSocket traffic.

Features

• Support forward proxy
• Support reverse proxy
• Support filtering
• Support HTTP/HTTPS/WS/WSS protocols
• Integrate web interface
• Integrate certificates installation webapp
• Export in Markdown, cURL, or HAR formats

Installation

With cargo

cargo install proxyfor

Binaries on macOS, Linux, Windows

Download from Github Releases, unzip and add proxyfor to your $PATH.

Usage

Forward Proxy

The client sets the proxy to http://127.0.0.1:8080.

$ proxyfor
$ curl -x http://127.0.0.1:8080 httpbin.org/ip

Reverse Proxy

The client directly requests http://127.0.0.1:8080.

This mode is suitable for scenarios where client cannot set a proxy.

$ proxyfor https://httpbin.org
$ curl http://127.0.0.1:8080/ip

Web Interface

Proxyfor provides a web-based user interface that allows you to interactively inspect the HTTP traffic. All traffic is kept in memory, which means that it’s intended for small-ish samples.

Command Line

Usage: proxyfor [OPTIONS] [URL]

Arguments:
  [URL]  Reverse proxy url

Options:
  -l, --listen <ADDR>         Listening ip and port address [default: 0.0.0.0:8080]
  -f, --filters <REGEX>       Only inspect http(s) traffic whose `{method} {uri}` matches the regex
  -m, --mime-filters <VALUE>  Only inspect http(s) traffic whose content-type matches the value
  -w, --web                   Enable web interface
  -h, --help                  Print help
  -V, --version               Print version

Change the ip and port.

proxyfor -l 18080
proxyfor -l 127.0.0.1
proxyfor -l 127.0.0.1:18080

Enable web interface with -w/--web

proxyfor --web

Use -f/--filters to filter traffic by matching {method} {uri}.

proxyfor -f httpbin.org/ip -f httpbin.org/anything
proxyfor -f '/^(get|post) https:\/\/httpbin.org/'       

Use -m/--mime-filters to filter traffic by content-type.

proxyfor -m application/json -m application/ld+json
proxyfor -m text/

Pipe it to a markdown file, then view the captured traffic using your favorite editor/IDE with syntax highlighting, folding, search capabilities.

proxyfor > proxyfor.md

Certificates

Proxyfor can decrypt encrypted traffic on the fly, as long as the client trusts proxyfor’s built-in certificate authority. Usually this means that the proxyfor CA certificate has to be installed on the client device.

By far the easiest way to install the proxyfor CA certificate is to use the built-in certificate installation app. To do this, start proxyfor and configure your target device with the correct proxy settings. Now start a browser on the device, and visit the magic domain proxyfor.local.

License

Copyright (c) 2024-∞ proxyfor-developers.

Proxyfor is made available under the terms of either the MIT License or the Apache License 2.0, at your option.

See the LICENSE-APACHE and LICENSE-MIT files for license details.