package main import ( "io" "io/ioutil" "net/http" "nginx/unit" ) func handler(w http.ResponseWriter, r *http.Request) { b, e := ioutil.ReadFile("404.html") if e == nil { w.WriteHeader(http.StatusNotFound) io.WriteString(w, string(b)) } } func main() { http.HandleFunc("/", handler) unit.ListenAndServe(":7080", nil) }