Multithreaded Proxy Web Server with LPU cache

This is the project which tell us about.. how the Multi-threaded webserver with LRU cache are working under the hood..

Concepts Learned while building are:

• Multithreading - helps cpu to execute concurrently
• Semaphores - mechanism used to control access to shared resource.. prevent race condition
• Mutex Lock - takes care that only one thread get the access to the resource
• Sockets - endpoint communication between two machines..
• LRU Cache (Least Recently Used) - mechanism that removes the least recently accessed items first
• pthreads - POSIX standard api for creating and managing threads

Features

• HTTP/1.0 and HTTP/1.1 support
• Parallel request handling
• LRU caching mechanism
• Mutex and semaphore usage to conqueror race condition
• Only supports GET request

Project Description

• Understanding
  • the working of server that is request from local computer to the server
  • handling of multiple requests from clients
  • understanding the mechanism for LRU cache.
  • using semaphore and mutex_lock to avoid race condition
• working
  • User sends the request to the proxy server..
  • it checks whether the asked url is present in cache or not..
    • if yes.. then returns back the body of the requested url..
    • it no.. then sends the request further to the main server.. getting the information
  • adds the request to the cache and send the body and info to the client.. Note: for every request different thread is been created and it is connected with the socket which is the bridge between the server and the client..

• limitations
  • only accepts the get request
  • doesn't support the https request..
  • doesn't support the latest sites.. cause they uses the http2 and http3..
• tech specs
  • Max Clients - 10
  • Default port - 8080 (can change during running)
  • Cache size - 10MB

Build and Run

git clone https://github.com/Bala-Vignesh-Reddy/Web-Server.git 
cd Web-Server
make
./proxy <port_num>

Contributing

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