package main

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

var name string

func main() {
	hostname, err := os.Hostname()
	if err != nil {
		log.Println("got hostname error:", err)
	}

	name = hostname

	http.HandleFunc("/echo", echoHandler)

	fmt.Println("Starting server on :8080")
	if err := http.ListenAndServe(":8080", nil); err != nil {
		log.Fatal(err)
	}

}

func echoHandler(w http.ResponseWriter, r *http.Request) {
	clientIp := getRemoteIP(r)
	fmt.Fprintf(w, "hello %s Host %s provides services", clientIp, name)
}

func getRemoteIP(r *http.Request) string {
	return r.RemoteAddr
}