Go Distributed Rate Limiter

A rate limiter service built with Go. It uses Redis to store data (so it works across multiple servers) and gRPC for internal communication.

How it Works

1. User sends a request to the HTTP API.
2. Middleware asks the gRPC Service: "Can this IP pass?"
3. Service checks the count in Redis using a Lua script.
4. If allowed, the request goes through. If not, it returns 429 Too Many Requests.

Tech Stack

• Go (Server & Logic)
• Redis (Database for counting tokens)
• gRPC/Protobuf (Communication between services)
• Docker (To run Redis)

How to Run

1. Start Redis

   docker run -d -p 6379:6379 redis

2. Start the Server

   go run cmd/server/main.go

3. Test it Run this in your terminal to spam requests:

   for i in {1..10}; do curl http://localhost:8080/api/data; echo; done