Socket-Programming in Python

This project is a simple implementation of a client-server model using Python's socket module. The server is able to handle multiple clients at once.

Connections

• Persistent connection is made between server and each client
• Each connection runs on a separate thread.
• Each connection has a dynamic timeout set by server, timeout = max(5 seconds, 20 - current-number-of-connections)
• Server itself has a timeout of 60 seconds of inactivity, meaning if server doesb't get any requests for continuous 60 seconds it will shut down

Requests

Clients can send:

• GET requests to get a certain file from the server
• POST requests to send a file to the server

Responses

The server can respond with:

• 200 OK if the request was successful
• 404 Not Found if the requested file was not found

For GET requests, the server will send the file requested by the client. For POST requests, the server will save the file sent by the client.

Files Supported

The server can handle the following file types:

• .txt
• .jpg
• .png
• .html

How to run Server

1. Default port: 8080

   python3 server/server.py
   

2. Commandline argument port

   python3 server/server.py 8089
   

How to send Requests

1. Client which asks for request every time

   python3 client/client.py 
   

2. Client which parses file to send requests to server

   python3 client/client_parser.py hostname port
   

   Or use defaults, localhost and 8080:

   python3 client/client_parser.py
   

Testing

1. Bonus Test Cases

   http://localhost:8080/server/testServer.txt
   

   http://localhost:8080/server/photoServer.jpg
   

   http://localhost:8080/server/welcome.html
   

2. client.py tests

   GET server/testServer.txt
   

   POST client/testClient.txt
   

   GET server/photoServer.jpg
   

   POST client/photoClient.jpg
   

   GET server/welcome.html
   

Notes

index.html was changed because browsers load its favicon by default which leads to delay, so it was changed to welcome.html to avoid confusion.

Finally ... Welcome to our Server!