This project implements a multi-threaded proxy server using semaphores for concurrency control. It handles multiple client requests, caching using the LRU algorithm, and demonstrates proxy functionalities.

• Threading: Manages multiple client requests.
• Semaphore: Used instead of condition variables and pthread_join()/pthread_exit(). Semaphores' sem_wait() and sem_post() do not need parameters, making them a better option.
• Cache: Speeds up processing (LRU algorithm).

• Separate cache entries for URLs with multiple clients.
• Fixed cache element size.

• Multiprocessing for better performance.
• Selective website access control.
• Support for POST requests.

1. Clone the repository:

2. Navigate to the project directory:

3. Build the project:

   make all

4. Run the proxy server:

   ./proxy <port no.>

5. Open in browser:

   http://localhost:<port>/any link u want to test (eg--www.google.com)

• Linux only. Disable browser cache.
• For no-cache version, rename proxy_server_with_cache.c to proxy_server_without_cache.c in the MakeFile.