Simple Go HTTP/2 server

toy-server.go

package main

import (
	"log"
	"net/http"

	"golang.org/x/net/http2"
	"golang.org/x/net/http2/h2c"
)

func handler(w http.ResponseWriter, req *http.Request) {
	defer req.Body.Close()
	log.Printf("Request connection: %s, %+v", req.Proto, req.URL.Path)
	http.Error(w, "", http.StatusServiceUnavailable)
}

func main() {
	server := &http.Server{
		Addr:    ":9920",
		Handler: h2c.NewHandler(http.HandlerFunc(handler), &http2.Server{}),
	}

	err := server.ListenAndServe()
	if err != nil {
		log.Fatalf("failed to listen: %v", err)
	}
	log.Printf("Listening [:9920]...")
}