myhead - http.Head with golang

myhead.go

package main

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

func main() {
	if len(os.Args) <= 0 {
		log.Println("URLが必要")
		panic(os.Args)
	}
	url := os.Args[1]
	callHead(url)

}

func callHead(url string) {

	request, _ := http.NewRequest("HEAD", url, nil)
	trans := &http.Transport{
		TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
	}

	client := &http.Client{
		Transport: trans,
	}

	resp, err := client.Do(request)
	if err != nil {
		log.Println(err)
		os.Exit(1)
	}
	for name, value := range resp.Header {
		fmt.Printf("%v: %v\n", name, value)
	}
}