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Fluxzy.Core 1.37.2

Fluxzy.Core

A fast, fully streamed MITM engine for intercepting, recording, and modifying HTTP/1.1, HTTP/2, WebSocket, and gRPC traffic over plain or TLS-secured channels.

This package is used under the hood by Fluxzy Desktop, a cross-platform HTTP debugger, and Fluxzy CLI.

Key Features

• Intercept HTTP/1.1, HTTP/2, WebSocket, and gRPC traffic
• Act as a system-wide proxy
• Export sessions as HTTP Archive (HAR) or Fluxzy Archive
• Choice of TLS providers: .NET native or BouncyCastle
• Impersonate JA4 fingerprints and custom HTTP/2 settings

Traffic Modification

• Add, remove, or modify request and response headers
• Transform request and response bodies
• Mock or substitute request and response bodies
• Forward, redirect, spoof DNS, or abort connections
• Inject HTML snippets into responses
• Serve a static directory
• Provide custom TLS certificates per host

Browse all built-in actions and filters.

Supported Proxy Protocols

Quick Start

var fluxzySetting = FluxzySetting.CreateDefault(IPAddress.Any, 44344);

fluxzySetting
 .ConfigureRule()
 .WhenAny()
 .Do(new AddResponseHeaderAction("x-fluxzy", "Captured by Fluxzy"));

await using var proxy = new Proxy(fluxzySetting);
var endpoints = proxy.Run();

Console.WriteLine($"Fluxzy is running on {endpoints.First().Address}:{endpoints.First().Port}");
Console.ReadKey();

More examples in the examples directory.

Documentation

• Full documentation
• Rule file reference
• GitHub repository