// command v46 serves http on various network types
package main

import (
	"flag"
	"fmt"
	"log"
	"net"
	"net/http"
	"time"
)

const resp = `{"ok": true}
`

var port = flag.Int("port", 8400, "listening port")
var both = flag.Bool("both", false, "listen on ipv4 and ipv6")
var dur = flag.Duration("dur", 10*time.Second, "how long to sleep before giving a request")

func main() {
	flag.Parse()
	http.HandleFunc("/", func(w http.ResponseWriter, req *http.Request) {
		time.Sleep(*dur)
		w.Header().Set("Content-Type", "application/json")
		fmt.Fprintf(w, resp)
	})

	a := fmt.Sprintf(":%d", *port)
	log.Printf("listening on: %+v", a)
	proto := "tcp4"
	if *both {
		proto = "tcp"
	}
	l, err := net.Listen(proto, a)
	if err != nil {
		log.Fatalf("failed to listen: %v", err)
	}
	if err := http.Serve(l, nil); err != nil {
		panic(err)
	}
}