Secure File Sharing System

A cloud-based secure file sharing system built with MERN stack and AWS services.

Features

• User Authentication & Authorization (JWT)
• Secure File Upload & Download (AWS S3)
• Access Control (Public/Private links)
• Audit Logging
• Background Processing (RabbitMQ)
• Rate Limiting (Redis)

Tech Stack

• Backend: Node.js, Express.js
• Frontend: React.js
• Database: AWS DynamoDB
• Storage: AWS S3
• Message Queue: RabbitMQ
• Cache: Redis
• Authentication: JWT

Prerequisites

• Node.js >= 14.x
• AWS Account with S3 and DynamoDB access
• RabbitMQ Server
• Redis Server
• MongoDB (for user sessions)

Project Structure

.
├── backend/                 # Express backend
│   ├── src/
│   │   ├── controllers/    # Route controllers
│   │   ├── middleware/     # Custom middleware
│   │   ├── models/        # Data models
│   │   ├── routes/        # API routes
│   │   ├── services/      # Business logic
│   │   └── utils/         # Utility functions
│   └── config/            # Configuration files
└── frontend/              # React frontend
    ├── src/
    │   ├── components/    # React components
    │   ├── pages/        # Page components
    │   ├── services/     # API services
    │   └── utils/        # Utility functions
    └── public/           # Static files

Setup Instructions

Backend Setup

1. Navigate to the backend directory:

   cd backend

2. Install dependencies:

   npm install

3. Create a .env file with the following variables:

   PORT=5000
   NODE_ENV=development
   
   # AWS Configuration
   AWS_ACCESS_KEY_ID=your_access_key
   AWS_SECRET_ACCESS_KEY=your_secret_key
   AWS_REGION=your_region
   S3_BUCKET_NAME=your_bucket_name
   
   # JWT Configuration
   JWT_SECRET=your_jwt_secret
   JWT_EXPIRE=24h
   
   # RabbitMQ Configuration
   RABBITMQ_URL=amqp://localhost
   
   # Redis Configuration
   REDIS_URL=redis://localhost
   

4. Start the backend server:

   npm run dev

Frontend Setup

1. Navigate to the frontend directory:

   cd frontend

2. Install dependencies:

   npm install

3. Create a .env file with the following variables:

   REACT_APP_API_URL=http://localhost:5000/api
   

4. Start the frontend development server:

   npm start

API Documentation

The API documentation can be found at /api-docs when running the backend server.

Security Features

• JWT-based authentication
• File encryption at rest
• Secure file sharing with expiring links
• Rate limiting to prevent abuse
• Access control and audit logging
• CORS protection
• Request validation
• XSS protection

Contributing

1. Fork the repository
2. Create your feature branch
3. Commit your changes
4. Push to the branch
5. Create a new Pull Request