Rate-Limited Analytics API Service

A scalable API service that handles social media analytics processing with tier-based rate limiting and sentiment analysis.

Features

• Rate Limiting: Tier-based rate limiting (Free, Standard, Premium)
• Analytics Processing:
  • Hashtag extraction
  • Sentiment analysis
  • Platform-specific metrics
• Time-Based Analytics: Filter data by date ranges
• Redis Backend: Fast data storage and retrieval
• RESTful API: Clean and well-documented endpoints

Prerequisites

• Node.js (v14 or higher)
• Redis (v6 or higher)
• npm or yarn

Installation

1. Clone the repository:

git clone https://github.com/yourusername/rate-limiter-api.git
cd rate-limiter-api

2. Install dependencies:

npm install

3. Set up environment variables:

cp .env.example .env

Edit .env with your configuration:

PORT=3000
REDIS_URL=redis://localhost:6379
NODE_ENV=development

4. Start Redis:

brew services start redis  # macOS
# or
sudo service redis start  # Linux

5. Start the server:

npm start

API Endpoints

Health Check

GET /health

Submit Analytics

POST /api/v1/analytics/submit
Headers:
  - X-User-ID: <user_id>
  - X-User-Tier: <free|standard|premium>

Dashboard Analytics

GET /api/v1/analytics/dashboard?user_id=<user_id>&start_date=<date>&end_date=<date>&platform=<platform>

Rate Limits

Tier	Requests/Minute	Requests/Hour
Free	10	100
Standard	50	500
Premium	200	2000

Testing

1. Run automated tests:

npm test

2. Manual testing script:

chmod +x test.sh
./test.sh

See API Testing Documentation for detailed testing instructions.

Project Structure

.
├── src/
│   ├── app.js              # Main application file
│   ├── config/             # Configuration files
│   ├── middleware/         # Custom middleware
│   ├── routes/             # Route handlers
│   ├── services/           # Business logic
│   └── utils/              # Utility functions
├── test/                   # Test files
├── .env                    # Environment variables
├── .gitignore
├── package.json
└── README.md

Error Handling

The API uses standard HTTP status codes:

• 200: Success
• 400: Bad Request
• 429: Too Many Requests
• 500: Internal Server Error

Example error response:

{
  "status": "error",
  "message": "Rate limit exceeded",
  "retry_after": 30
}

Development

Adding New Features

1. Create a new branch:

git checkout -b feature/your-feature-name

2. Make your changes and commit:

git commit -m "Add: your feature description"

3. Push and create a pull request:

git push origin feature/your-feature-name

Code Style

• Use ESLint for code linting
• Follow JavaScript Standard Style
• Add JSDoc comments for functions

Deployment

Docker

1. Build the image:

docker build -t rate-limiter-api .

2. Run the container:

docker run -p 3000:3000 rate-limiter-api

Production Considerations

• Set NODE_ENV to 'production'
• Use a production Redis instance
• Configure appropriate logging levels
• Set up monitoring and alerts

Contributing

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

License

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

Support

For support, email your-email@example.com or create an issue in the GitHub repository.

Acknowledgments

• Redis for the amazing in-memory data store
• Node.js community for excellent packages
• Contributors who helped improve the project # Rate_Limiter_for_API_Service