Proxy Application using Sockets in C

What does it do?

The purpose of this project is to present an implementation for unix-based systems of a proxy server that serves a set of clients (concurrently) on the same machine through parallel programming techniques. The proxy server makes HTTP requests to websites over the internet and returns their contents to the clients. The proxy uses a hash-based cache to store the contents and have access efficiently.

Architecture

Application

How to run?

• Clone the Repository

  $ git clone https://github.com/alexandreclem/Proxy.git

• Compile

  • Within the src/clients directory, run:

    $ make
    $ make clean        

  • Within the src/proxy directory, run:

    $ make
    $ make clean         

• Execute

  • Within the src/proxy directory, run:

    $ ./proxy TIMER_LIMIT PROXY_PORT

    • Where:
      • TMER_LIMIT - Time (in seconds) the data will be stored in the proxy cache
      • PROXY_PORT - Server Port

  • Within the src/clients directory, run:

    $ ./client PROXY_PORT

NOTE

You can run multiple clients on the same proxy server. For that, make sure the proxy is running and open different terminals to each client and connect them to the server.

How to use?

• The Data

  • The clients data (.html files) are stored inside src/clients/data.
  • The proxy data (.html files) are stored inside src/proxy/data.

• Commands

  In the client CLI you can run the four commands listed below:

  • fetch

    • Used to request a website for the proxy. You can pass multiple URLs, separated by spaces, for example:

      $ fetch http://www.test.com http://www.test2.com

  • list

    • Lists the current proxy content. Remember that after the TIME_LIMIT set up earlier, all proxy content is erased.

      $ list

  • history

    • Shows the history of commands that were run.

      $ history

  • Quit

    • Bye :) !

      $ quit

NOTE

In the src/test_urls.txt some URLs are provided to test the application.