httputil.go

package main

import (
	"fmt"
	"io/ioutil"
	"log"
	"net/http"
	"net/http/httputil"
	"os"
)

func main() {
	debug := os.Getenv("DEBUG")

	client := &http.Client{}
	request, err := http.NewRequest("GET", "https://ifconfig.co", nil)
	if err != nil {
		log.Fatal(err)
	}

	if debug == "1" {
		debugRequest, err := httputil.DumpRequestOut(request, true)
		if err != nil {
			log.Fatal(err)
		}
		fmt.Printf("%s", debugRequest)
	}

	response, err := client.Do(request)
	defer response.Body.Close()

	if debug == "1" {
		debugResponse, err := httputil.DumpResponse(response, true)
		if err != nil {
			log.Fatal(err)
		}
		fmt.Printf("%s", debugResponse)
	}

	body, err := ioutil.ReadAll(response.Body)
	if err != nil {
		log.Fatal(err)
	}

	fmt.Printf("%s", body)

}

DEBUG=1 go run httputil.go

GET / HTTP/1.1
Host: ifconfig.co
User-Agent: Go-http-client/1.1
Accept-Encoding: gzip

HTTP/1.1 200 OK
Content-Length: 13
Connection: keep-alive
Content-Type: text/plain; charset=utf-8
Date: Mon, 14 Nov 2016 15:07:01 GMT
Server: nginx
Strict-Transport-Security: max-age=31536000; includeSubdomains; preload

68.235.53.83
68.235.53.83