package main
import("io""io/ioutil""net/http""unit.nginx.org/go")funchandler(w http.ResponseWriter, r *http.Request) {
b, e := ioutil.ReadFile("404.html")if e ==nil{
w.WriteHeader(http.StatusNotFound)
io.WriteString(w,string(b))}}funcmain() {
http.HandleFunc("/", handler)
unit.ListenAndServe(":8080",nil)}