Client-Server Socket Programming

Introduction

This project implements client-server communication using socket programming in Python. It includes one client program and four server programs, each handling a different number of concurrent clients.

Programs

• client.py: The client program
• server1.py: Handles one client at a time
• server2.py: Handles two clients concurrently
• server3.py: Handles three clients concurrently
• server4.py: Echo server handling multiple clients

Features

• Arithmetic operations (+, -, *, /) with multiple operands
• Flexible input parsing (handles various spacing between operands and operators)
• Error handling for invalid operations
• Socket timeout for client-side server availability detection

Running the Programs

Server

python server#.py  # Replace # with 1, 2, 3, or 4

Client

python client.py

Additional Resources

• YouTube Video
• My YouTube Channel

Testing

Comprehensive tests have been conducted to ensure:

1. Correct arithmetic operations
2. Proper handling of multiple clients
3. Graceful disconnection and reconnection
4. Error handling and edge cases

Special Features

• Multi-operand arithmetic operations
• Flexible input parsing
• Robust error handling

Notes

• The server uses file numbers to refer to clients, which may be the same for different clients.
• For server1.py, a timeout feature is implemented to handle busy server scenarios.

Contributions

Contributions are welcome. Please fork the repository and submit a pull request with your changes.