58 Exercise: Errors
58 Exercise: Errors - done
59 Web Servers

Package http serves HTTP requests using any value that implements http.Handler:

```
package http

type Handler interface {
	ServeHTTP(w ResponseWriter, r *Request)
}
```

In this example, the type Hello implements http.Handler.
Visit http://localhost:4000/ to see the greeting.
60 Exercise: HTTP Handlers
60 Exercise: HTTP Handlers - done