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HTTP Interceptor Platform

A Charles Proxy–like tool to intercept and modify HTTP requests in real time.

Go
React
Proxy
System Design

HTTP Interceptor Platform

A powerful HTTP debugging proxy tool built with Go and React, designed to intercept, inspect, and modify HTTP/HTTPS traffic in real-time.

Overview

This project provides developers with a comprehensive solution for debugging web applications by capturing and analyzing network traffic. Similar to Charles Proxy, but with a modern tech stack and enhanced features.

Key Features

  • Real-time Traffic Interception: Capture all HTTP/HTTPS requests and responses
  • Request/Response Modification: Edit requests before they reach the server
  • SSL/TLS Support: Full HTTPS decryption and inspection
  • WebSocket Support: Monitor WebSocket connections
  • Performance Metrics: Track request timing and performance

Architecture

The system is built with a Go backend for high-performance proxy handling and a React frontend for the user interface.

proxy/handler.go

Technical Challenges

Building a reliable HTTP proxy required solving several complex problems:

  1. Certificate Management: Dynamic SSL certificate generation for HTTPS interception
  2. Connection Pooling: Efficient handling of concurrent connections
  3. Memory Management: Streaming large payloads without memory overflow

Results

  • Handles 10,000+ concurrent connections
  • Sub-millisecond latency overhead
  • 99.9% uptime in production environments

Future Enhancements

  • GraphQL introspection support
  • Advanced filtering and search
  • Request replay functionality
  • Cloud-based collaboration features