Multi-threaded Chat Server

A Python-based chat server implementing authentication, chat rooms, and pub-sub messaging.

Features Implemented

• ✅ Problem 1: Thread-based server with blocking I/O
• ✅ Problem 2: Authentication with bcrypt password hashing
• ✅ Problem 3: Force logout on duplicate login attempts
• ✅ Problem 4: Chat rooms with /join, /leave, /rooms commands
• 🚧 Problem 5: Publish-Subscribe (In Progress)
• ⏳ Problem 6: Redis Integration
• ⏳ Problem 7: TLS/SSL Encryption
• ⏳ Problem 8: Docker Deployment

Setup

1. Create Virtual Environment

python -m venv .venv
source .venv/bin/activate  # On Linux/Mac

2. Install Dependencies

pip install -r requirements.txt

3. Run Server

python -m server.server

4. Run Client

python -m client.client

Usage

Register a User

REGISTER alice password123

Login

LOGIN alice password123

Chat Commands

• /join <room> - Join a chat room
• /leave - Return to lobby
• /rooms - List all rooms
• /quit - Disconnect

Project Structure

chat-app/
├── server/
│   ├── server.py
│   ├── client_handler.py
│   ├── auth.py
│   ├── room_manager.py
│   └── config.py
├── client/
│   └── client.py
├── requirements.txt
└── README.md

Course Information

• Course: Internet Architecture and Protocols [CS60008]
• Assignment: Assignment 1
• Language: Python 3.9+