Go API Gateway

Hey there! I'm building this API Gateway from scratch to learn Go and get hands-on experience with concurrency, networking, and backend concepts.

What's Inside

• Dynamic Service Routing: Mapping paths to backend service clusters
• Round-Robin Load Balancing: Distributing requests evenly and thread-safely across healthy backends
• Active Health Checks: Concurrently checking backend health using goroutines, channels, and a background ticker
• Custom Middleware: Simple authentication, rate limiting, and request logging middleware
• Reverse Proxying: Forwarding HTTP requests efficiently while reusing connection pools

Project Structure

.
├── backend/        # Sample backend target servers for testing
├── healthcheck/    # Health check logic & background monitor
├── loadbalancer/   # Round-robin load balancer & proxy caching
├── middleware/     # Auth, rate limiting, and logging middleware
├── proxy/          # Reverse proxy setup
├── services/       # Service route definitions
└── main.go         # Application entry point

Running it Locally

Make sure you have Go installed on your machine.

1. Clone the repository:

   git clone https://github.com/your-username/api-gateway.git
   cd api-gateway

2. Run the server:

   go run main.go

The gateway will start listening on port 8080.

Contributing

Since I'm making this project to learn Go, any suggestions, fixes, or improvements are super welcome! If you'd like to contribute:

1. Fork the repo
2. Create your feature branch (git checkout -b feature/cool-feature)
3. Commit your changes (git commit -m 'Add cool feature')
4. Push to your branch (git push origin feature/cool-feature)
5. Open a Pull Request :)

Happy coding!