This doesn't work either

gistfile1.go

package main

import "net/http"
import "time"

func main() {

	http.HandleFunc("/ping", func1)
	http.HandleFunc("/ping2", func2)
	http.ListenAndServe(":8081", nil)
}

func func1(w http.ResponseWriter, req *http.Request) {
	w.Write([]byte("ping1"))
}

func func2(w http.ResponseWriter, req *http.Request) {
	go func() {
		time.Sleep(5 * time.Second)
		w.Write([]byte("ping2"))
	}()
}