A reverse proxy sits between clients and one or more upstream services. Instead of clients communicating directly with your application, every request first passes through the proxy before being forwarded to an upstream.
Mature reverse proxies such as Nginx, Envoy, and HAProxy do much more than simply forward requests. They perform tasks such as load balancing, health checks, rate limiting, metrics collection, and much more.
I wanted to better understand how some of these concepts work in practice, so I built a reverse proxy in Go. Along the way I implemented request forwarding, multiple load-balancing strategies, health checks, circuit breakers, rate limiting, request logging, metrics, and graceful shutdown.
If you'd like to explore Proxify as we go, you can find the project here:
https://github.com/Rahmannugar/proxify
