Multi-Client Chat Server (Python)

This project is a TCP-based multi-client chat application developed to understand core networking concepts, client–server architecture, and concurrent programming using Python.

The system allows multiple clients to connect to a central server and exchange messages in real time.

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Overview

The application consists of:

• A server program that accepts multiple client connections
• A client program that connects to the server and sends/receives messages

Each connected client runs in a separate thread on the server, enabling simultaneous communication among multiple users.

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Key Features

• TCP-based client–server communication
• Support for multiple concurrent clients using threading
• Real-time message broadcasting
• Basic message encryption and decryption using a Caesar cipher
• Server-side logging of chat messages with timestamps
• Graceful handling of client join and disconnect events

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Technical Details

• The server listens on a specified port and spawns a new thread for each client connection.
• Messages are encrypted before transmission and decrypted on receipt.
• Chat activity is logged on the server for monitoring and debugging purposes.

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Technology Stack

• Python
• Socket Programming
• Multithreading

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Project Structure

multi-client-chat-server/ ├── server.py ├── client.py └── README.md

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How to Run

1. Start the server:

2. Start one or more clients in separate terminals:

3. Enter a username and begin chatting.

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Author

Ujwal Parashar
B.Tech Information Technology
Jaypee Institute of Information Technology, Noida

GitHub: https://github.com/ujwal262006
LinkedIn: https://linkedin.com/in/ujwal-parashar-3195a735a