see: https://github.com/hydrogen18/stoppableListener/blob/master/example/example.go

h.go

package main

import (
	"fmt"
	"github.com/hydrogen18/stoppableListener"
	"net"
	"net/http"
	"sync"
	"time"
)

func Hello(rw http.ResponseWriter, req *http.Request) {
	rw.WriteHeader(http.StatusOK)
	fmt.Fprintf(rw, "Hello\n")
}

func main() {
	l, err := net.Listen("tcp", ":3333")
	if err != nil {
		panic(err)
	}
	sl, err := stoppableListener.New(l)
	if err != nil {
		panic(err)
	}
	http.HandleFunc("/", Hello)
	s := http.Server{}

	var wg sync.WaitGroup
	go func() {
		wg.Add(1)
		defer wg.Done()
		s.Serve(sl)
	}()
	fmt.Printf("Serving HTTP\n")

	fmt.Println("stopping listener..")
	sl.Stop()
	fmt.Println("waiting on server")
	wg.Wait()
}