Proxy Web Server

A Multi-Threaded HTTP Proxy Server written in C, designed to efficiently handle multiple simultaneous client requests while improving performance through an integrated LRU (Least Recently Used) caching system.

Features

• 🌐 HTTP Proxy Server: Forwards client HTTP requests to target web servers and returns responses.
• ⚙️ Multi-threaded Architecture: Handles multiple client connections simultaneously.
• 🧠 LRU Caching System: Stores frequently accessed web pages to minimize redundant network requests.
• 🔒 Thread Synchronization: Uses semaphores to ensure safe access to shared resources and prevent race conditions.
• 📜 Makefile Support: Simplifies compilation and project management.

Technologies Used

• Programming Language: C
• Core Concepts: Socket Programming, Multi-threading, Synchronization with Semaphores
• Data Structures: LRU Cache
• Build Tool: Makefile

How It Works

1. Client sends an HTTP GET request to the proxy server.
2. Proxy checks the cache:
   • If present: sends cached response.
   • If not: forwards the request to the original server, caches the response, and returns it to the client.
3. Handles multiple clients simultaneously using multi-threading.
4. Uses semaphores to ensure mutual exclusion when accessing or modifying shared resources like the cache.

Author

Gagandeep Singh Choudhary

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