package main

import (
	"fmt"
	"io/ioutil"
	"net"
	"os"
	"strconv"
)

func main() {
	if len(os.Args) != 3 {
		fmt.Println("usage: %s ip-address\n", os.Args[0])
		os.Exit(1)
	}

	port, _ := strconv.Atoi(os.Args[2])
	OpenRequestIPV4(os.Args[1], port)

}

// OpenRequestIPV4 Opens a request to an ipv4 tcp network address
func OpenRequestIPV4(ipv4Address string, port int) {

	service := ipv4Address + ":" + strconv.Itoa(port)
	tcpv4Addr, _ := net.ResolveTCPAddr("tcp", service)
	conn, _ := net.DialTCP("tcp4", nil, tcpv4Addr)
	_, _ = conn.Write([]byte("HEAD / HTTP/1.0\r\n\r\nGet index.html"))

	result, _ := ioutil.ReadAll(conn)

	fmt.Println(string(result))

	os.Exit(0)

}

func checkError(err error) {
	fmt.Println(err.Error())
}