CodeCrafter - Collaborative Code Execution Platform

Real-time collaborative code editing with secure sandboxed execution Built with Node.js, MongoDB, WebSocket, Docker, and Redis

What is CodeCrafter?

CodeCrafter is a hardcore backend platform that enables multiple users to write, execute, and collaborate on code in real-time. Think of it as Google Docs for Code with a built-in secure code executor.

� Key Features

Key Features

Core Features

✅ Real-time Collaboration - Multiple users editing simultaneously with CRDT-based conflict resolution
✅ Secure Code Execution - Docker-based sandboxed environment
✅ Multi-language Support - JavaScript, Python, Java, C/C++, Go, Rust
✅ JWT Authentication - Secure user authentication and authorization
✅ WebSocket Communication - Real-time updates and collaboration
✅ Session Management - Create, join, and manage coding sessions

Technical Features

✅ CRDT Implementation - Conflict-free replicated data types for collaborative editing
✅ Background Workers - RabbitMQ-based job queue for code execution
✅ Redis Caching - Session storage and real-time data caching
✅ Rate Limiting - Protection against abuse and resource exhaustion
✅ Comprehensive Logging - Winston-based logging with multiple levels
✅ Health Monitoring - Built-in health checks and metrics
✅ Auto-scaling - Worker processes can be scaled based on demand

Quick Start (5 Minutes)

Prerequisites

🐳 Docker & Docker Compose (recommended) OR
Node.js 16+, MongoDB 4.4+, Redis 6+, RabbitMQ 3.8+

Option 1: Docker (Easiest - Recommended)

1️⃣ Clone Repository

git clone https://github.com/tanmayjoddar/Muweb.git
cd Muweb

2️⃣ Start Everything (One Command!)

docker-compose up -d

3️⃣ Verify Services

docker-compose ps

4️⃣ Access Applications

App: http://localhost:8000
RabbitMQ: http://localhost:15672 (codecrafter / codecrafter123)
Prometheus: http://localhost:9090
Grafana: http://localhost:3001 (admin / codecrafter123)

✅ Done! Your entire stack is running.

Option 2: Local Development

1️⃣ Clone Repository

git clone https://github.com/tanmayjoddar/Muweb.git
cd Muweb

2️⃣ Install Dependencies

npm install

3️⃣ Set Up Environment

cp .env.example .env

4️⃣ Start Application

npm run dev

** 5️⃣ Start Worker (New Terminal)**

npm run worker

🐳 Docker Commands (Copy & Paste)

Start/Stop Services

# Start all services
docker-compose up -d

# Stop all services
docker-compose stop

# Restart specific service
docker-compose restart app

# Remove everything
docker-compose down

# Remove everything including data
docker-compose down -v

View Logs & Status

# See all containers
docker-compose ps

# Real-time app logs
docker-compose logs -f app

# View last 50 lines
docker-compose logs app --tail 50

# All service logs
docker-compose logs

Database Access

# MongoDB shell
docker-compose exec mongo mongosh -u codecrafter -p codecrafter123

# Redis CLI
docker-compose exec redis redis-cli -a "your-password"

# PostgreSQL (if migrated)
docker-compose exec postgres psql -U codecrafter -d codecrafter

Run Commands in Containers

# Run tests
docker-compose exec app npm test

# Database migration
docker-compose exec app npm run migrate

# View metrics
docker stats

Scale Workers

# Start 3 worker instances
docker-compose up -d --scale worker=3

# View all workers
docker-compose ps | grep worker

Service Ports & URLs

Service	URL	Port	Credentials
App	http://localhost:8000	8000	-
Nginx	http://localhost:80	80	-
RabbitMQ	http://localhost:15672	15672	codecrafter / codecrafter123
Prometheus	http://localhost:9090	9090	-
Grafana	http://localhost:3001	3001	admin / codecrafter123
MongoDB	localhost	27017	codecrafter / codecrafter123
Redis	localhost	6379	(from .env)

Environment Configuration

Create `.env` File

cp .env.example .env

Essential Variables

#  Database
MONGODB_URI=mongodb://codecrafter:codecrafter123@mongo:27017/codecrafter
REDIS_HOST=redis
REDIS_PORT=6379
REDIS_PASSWORD=your_redis_password

#  RabbitMQ
RABBITMQ_URL=amqp://rabbitmq:5672
RABBITMQ_USERNAME=codecrafter
RABBITMQ_PASSWORD=codecrafter123

#  JWT
JWT_SECRET=your-super-secret-key-min-32-characters
JWT_REFRESH_SECRET=your-super-secret-refresh-key-min-32-chars

#  Server
PORT=5000
NODE_ENV=development
FRONTEND_URL=http://localhost:3000

#  Docker Limits
DOCKER_TIMEOUT=30
DOCKER_MEMORY_LIMIT=128m
DOCKER_CPU_LIMIT=0.5

#  Languages
SUPPORTED_LANGUAGES=javascript,python,java,cpp,c,go,rust
DEFAULT_LANGUAGE=javascript

Testing & Scripts

# Run all tests
npm test

# Run specific test
npm test -- auth.test.js

# Watch mode
npm run test:watch

# With coverage
npm run test:coverage

# Run in Docker
docker-compose exec app npm test

Available Scripts

npm run dev              # Start with hot reload
npm run worker           # Start code executor worker
npm start                # Production start
npm test                 # Run tests
npm run migrate          # Database migration

📁 Project Structure

Muweb/
├── 📂 api/              # API Routes
├── 📂 config/           # Configuration
├── 📂 controllers/      # Business Logic
├── 📂 models/           # Data Models
├── 📂 middleware/       # Middleware
├── 📂 services/         # Services
├── 📂 websocket/        # WebSocket
├── 📂 workers/          # Background Workers
├── 📂 tests/            # Test Suite
├── 🐳 docker-compose.yml  # Docker Setup
├── 📝 .env              # Environment
└── 📦 package.json      # Dependencies

🚨 Troubleshooting

Services Won't Start

# Check logs
docker-compose logs mongo

# Rebuild
docker-compose build --no-cache
docker-compose up -d

Port Already in Use (Windows)

netstat -ano | findstr :5000
taskkill /PID <PID> /F

Port Already in Use (Mac/Linux)

lsof -i :5000
kill -9 <PID>

Database Connection Failed

# Test connection
docker-compose exec mongo mongosh
docker-compose exec redis redis-cli ping

# Restart services
docker-compose restart

Still Need Help?

# Check detailed logs
docker-compose logs app --tail 100

# View environment
docker-compose config | grep -A 20 "app:"

# Network check
docker network ls
docker network inspect muweb_codecrafter-network

📚 Detailed Documentation

🐳 Docker Quick Start Guide - All Docker commands
🗄️ Local Redis & PostgreSQL Setup - Local database setup
🔄 MongoDB to PostgreSQL Migration - Complete migration guide

🔐 Security Features

✅ JWT token-based authentication
✅ CORS protection
✅ Rate limiting (100 req/min)
✅ Input validation & sanitization
✅ SQL injection prevention
✅ XSS protection
✅ CSRF tokens
✅ Encrypted password hashing (bcrypt)
✅ Environment variable isolation
✅ Secure headers (Helmet.js)

📜 License

This project is licensed under the MIT License - see the LICENSE file for details.

Made with passion by the Tanmay Joddar

⭐ If you like this project, please give it a star!

⬆ Back to Top

```` ```

3️⃣ Set Up Environment

cp .env.example .env

4️⃣ Start Application

npm run dev

5️⃣ Start Worker (New Terminal)

npm run worker

Name		Name	Last commit message	Last commit date
backend		backend
frontend		frontend
.gitignore		.gitignore
LATEST_UPDATES.md		LATEST_UPDATES.md
PROJECT_STATUS.md		PROJECT_STATUS.md
QUICK_REFERENCE.md		QUICK_REFERENCE.md
README.md		README.md
VISUAL_DIAGRAMS.md		VISUAL_DIAGRAMS.md
package-lock.json		package-lock.json

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