Handlers & the server

The server the app was talking to

In the iOS course, PawWalk's walker list came from an HTTP request to a URL. Something on the other end received that request and wrote back a response. That something is what you build now — and Go ships a production-grade HTTP server in its standard library. No framework to install, no Express, no Rails: net/http is enough to serve real traffic.

The whole model is two ideas: a handler is a function that receives a request and writes a response, and the server listens on a port and calls the right handler for each incoming request. That's it — everything else is detail.