whistle

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Whistle (pronounced /ˈwisəl/) is a cross-platform network debugging and proxy tool built on Node.js. It provides powerful packet capture, request/response inspection and modification, a rule-based modification engine, and extensibility through plugins.

Key features:

1. Powerful
   • Capture and modify HTTP, HTTPS, HTTP/2, WebSocket, and TCP traffic
   • Supports HTTP, HTTPS, Socks and reverse proxy modes
   • Built-in tools: Weinre (remote DOM inspection), Console (console logs), Composer (request replay/editing), etc.
2. Easy to use
   • Rule-based request/response modification
   • Unified UI for captures, rules, plugins, Weinre/Console/Composer and more
3. Extensible
   • SPlugin support for extending rules and UI
   • Can be used as an NPM module in projects
4. Cross-platform
   • Supports macOS, Windows, Linux (Ubuntu/Fedora) desktop systems
   • Supports headless Linux server environments

Installation (recommended)

Desktop users (macOS/Windows/Linux) should use the Whistle client: https://github.com/avwo/whistle-client

The client skips manual installation and configuration steps

Headless Linux / Server Install (CLI)

Follow these 4 steps to deploy Whistle on a headless server:

1. Install Whistle (recommended via npm)
   • Install Node.js first: https://nodejs.org/
   • Install: npm i -g whistle

     Alternatively via Homebrew: brew install whistle

2. Start Whistle
   • Command: w2 start
3. Install CA certificate (required for HTTPS capture)
   • Command: w2 ca
   • Manual confirmation may be required:
     • Windows: confirm with “Yes (Y)”
     • macOS: may require entering password or Touch ID
4. Configure proxy
   • Command: w2 proxy
   • Specify host:port: w2 proxy "10.x.x.x:8888"
   • Disable system proxy: w2 proxy 0

Other proxy options:

• Recommended: use a Chrome proxy extension ZeroOmega for easy switching

  Chrome Web Store (or manual install if blocked): https://chromewebstore.google.com/detail/proxy-switchyomega-3-zero/pfnededegaaopdmhkdmcofjmoldfiped

• Use browser/devtools built-in proxy settings (e.g. Firefox, WeChat DevTools)
• For apps that can't set proxies directly, use Proxifier (Windows/macOS)

Quick Start

See the official guide for usage and examples: https://wproxy.org/docs/getting-started.html

Common Commands

• Start: w2 start
• Stop: w2 stop
• Restart: w2 restart
• Status: w2 status
• Install CA: w2 ca
• Set proxy: w2 proxy [host:port] (use w2 proxy 0 to disable)

License

MIT — see the LICENSE file