User Authentication Service

A Node.js Express-based user authentication service with JWT token authentication and SQLite database.

Features

• User registration and login
• JWT token-based authentication
• Password hashing with bcryptjs
• SQLite database with Sequelize ORM
• File upload functionality with multer
• Image processing and avatar uploads
• Input validation with express-validator
• Rate limiting and security headers
• CORS enabled for all origins
• Health check endpoint
• Environment-based configuration

Environment Variables

Create a .env file in the root directory with the following variables:

• NODE_ENV: Environment (development/production)
• PORT: Server port (default: 3000)
• JWT_SECRET: JWT secret key for token signing (required for production)
• JWT_EXPIRES_IN: Token expiration time (default: 24h)

Copy .env.example to .env and update the values:

cp .env.example .env

Installation

1. Install Node.js dependencies:

npm install

2. Set up environment variables:

cp .env.example .env

3. Start the application in development mode:

npm run dev

Or start in production mode:

npm start

API Endpoints

Public Endpoints

• GET / - Service information
• GET /health - Health check
• POST /api/v1/auth/register - User registration
• POST /api/v1/auth/login - User login

Protected Endpoints (require Bearer token)

• GET /api/v1/users/me - Get current user info
• GET /api/v1/users/profile - Get user profile
• PUT /api/v1/users/profile - Update user profile
• DELETE /api/v1/users/deactivate - Deactivate user account

File Upload Endpoints

• POST /api/v1/upload/files - Upload multiple files (protected)
• POST /api/v1/upload/avatar - Upload user avatar (protected)
• GET /api/v1/upload/files - List uploaded files (protected)
• GET /api/v1/upload/files/:filename - Download specific file (public)
• GET /api/v1/upload/avatars/:filename - Get avatar image (public)
• DELETE /api/v1/upload/files/:filename - Delete file (protected)

Usage Examples

1. Register a new user:

curl -X POST "http://localhost:3000/api/v1/auth/register" \
     -H "Content-Type: application/json" \
     -d '{"email": "user@example.com", "password": "password123"}'

2. Login to get access token:

curl -X POST "http://localhost:3000/api/v1/auth/login" \
     -H "Content-Type: application/json" \
     -d '{"email": "user@example.com", "password": "password123"}'

3. Access protected endpoint:

curl -X GET "http://localhost:3000/api/v1/users/me" \
     -H "Authorization: Bearer YOUR_ACCESS_TOKEN"

4. Update user profile:

curl -X PUT "http://localhost:3000/api/v1/users/profile" \
     -H "Authorization: Bearer YOUR_ACCESS_TOKEN" \
     -H "Content-Type: application/json" \
     -d '{"email": "newemail@example.com"}'

5. Upload files:

curl -X POST "http://localhost:3000/api/v1/upload/files" \
     -H "Authorization: Bearer YOUR_ACCESS_TOKEN" \
     -F "files=@/path/to/file1.pdf" \
     -F "files=@/path/to/file2.jpg"

6. Upload avatar:

curl -X POST "http://localhost:3000/api/v1/upload/avatar" \
     -H "Authorization: Bearer YOUR_ACCESS_TOKEN" \
     -F "avatar=@/path/to/avatar.jpg"

7. List uploaded files:

curl -X GET "http://localhost:3000/api/v1/upload/files" \
     -H "Authorization: Bearer YOUR_ACCESS_TOKEN"

Development

Available Scripts

• npm start - Start the production server
• npm run dev - Start development server with nodemon
• npm run lint - Run ESLint
• npm run lint:fix - Run ESLint with auto-fix

Project Structure

src/
├── config/         # Database configuration
├── controllers/    # Route controllers
│   ├── authController.js
│   ├── userController.js
│   └── uploadController.js
├── middleware/     # Custom middleware
│   ├── auth.js
│   └── upload.js
├── models/         # Sequelize models
├── routes/         # Express routes
│   ├── auth.js
│   ├── users.js
│   └── upload.js
├── utils/          # Utility functions
└── server.js       # Main server file

File Upload Details

Supported File Types:

• Images: JPEG, JPG, PNG, GIF, WebP
• Documents: PDF, TXT, DOC, DOCX

Upload Limits:

• General files: 10MB per file, max 5 files
• Avatar images: 5MB per file, max 1 file
• Avatar images are automatically resized to 200x200px

Storage Locations:

• General files: /app/storage/uploads/
• Avatar images: /app/storage/avatars/