A simple golang http server with a shutdown route

gorestserver.go

package main

import (
	"context"
	"flag"
	"fmt"
	"log"
	"net/http"
)

type server struct {
	http http.Server
}

func main() {
	port := flag.Int("port", 8080, "port to listen on")
	flag.Parse()

	mux := http.NewServeMux()
	srv := server{
		http: http.Server{
			Addr:    fmt.Sprintf(":%d", *port),
			Handler: mux,
		},
	}
	//example curl for this route: `curl -X POST http://localhost:8080 -d username=foo -H 'Content-Type: application/x-www-form-urlencoded'`
	mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
		if err := r.ParseForm(); err != nil {
			fmt.Fprintf(w, "error parsing form data")
		} else {
			fmt.Fprintf(w, "hello Form:%+v", r.Form)
			for k, v := range r.Form {
				fmt.Fprintf(w, " - %v : %v", k, v)
			}
		}
	})

	mux.HandleFunc("/shutdown", func(w http.ResponseWriter, r *http.Request) {
		go srv.http.Shutdown(context.Background())
		w.WriteHeader(202)
	})

	if err := srv.Run(); err != nil {
		log.Fatalf("error running http server: %v\n", err)
	}

}

func (s *server) Run() error {
	log.Printf("Server Listening on %s", s.http.Addr)
	return s.http.ListenAndServe()
}