package main

import (

	"net/http"

)

type helloHandler struct{}

func (h *helloHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {

	w.Write([]byte("Hello, world!DAVID!"))

}

func main() {

	http.Handle("/", &helloHandler{})

	http.ListenAndServe(":12345", nil)

}