package main

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

func echo(w http.ResponseWriter, req *http.Request) {
	startTime := time.Now()
	log.Printf("request recv %v", startTime)
	fmt.Fprintf(w, "start time: %v\n", startTime)
	for key, value := range req.Header {
		for _, v := range value {
			fmt.Fprintf(w, "%v: %v\n", key, v)
		}
	}
	endTime := time.Now()
	fmt.Fprintf(w, "end time: %v\n", endTime)
}

func main() {
	http.HandleFunc("/", echo)
	log.Println("...starting echo server...")
	http.ListenAndServe(":9000", nil)
}