1.Request Routing

• Forward incoming API requests to the appropriate backend services based on the URL path or headers.
• Forward files to proxy server
• Proxy server uploads to s3 on aws

2 Authentication & Authorization

• Validate user credentials using JWT, OAuth2, or API keys.
• Ensure users and services have access only to authorized resources.

3.Rate Limiting

• Limit the number of requests per user or IP to prevent abuse.
• Implement distributed rate limiting using Redis. Revisit later, will require local docker/kubernetes instance.

4.Caching

• Cache responses to reduce backend load and improve response times.
• Use tools like Redis or in-memory caching libraries.

5.Load Balancing

• Distribute traffic evenly across multiple backend servers for scalability and reliability.

6.Monitoring & Logging

• Log request details, errors, and performance metrics.
• Integrate with tools like Winston, DataDog, or New Relic.

7.Request Transformation

• Modify incoming requests and outgoing responses (e.g., add headers, convert data formats).

Additional Features 1.Service Discovery

• Automatically discover backend services using tools like Consul or Eureka.

2.Error Handling

• Implement centralized error handling for consistent error responses across services.

3.SSL Termination

• Handle SSL/TLS encryption at the gateway level to offload this responsibility from backend services.

4.WebSocket Support

• Enable support for real-time communication protocols.

5.API Versioning

• Manage multiple API versions to maintain backward compatibility.

6.Custom Middleware

• Add middleware for additional functionalities like request validation or analytics.

7.Multi-tenancy

• Handle multi-tenant environments by isolating requests and resources for different tenants.

Development Features 1.Hot Reloading

• Use tools like nodemon for development to restart the gateway automatically on code changes.

2.Unit and Integration Testing

• Use testing frameworks like Jest or Mocha for comprehensive test coverage.

Tools & Technologies 1.Node.js Framework: Express or Fastify 2.Caching: Redis or node-cache 3.Authentication: jsonwebtoken, passport 4.Rate Limiting: express-rate-limit, Redis 5.Logging: Winston, Morgan 6.Service Communication: Axios or http-proxy-middleware