https with keep-alives history

main.go

package main

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

func main() {

	url := "https://jsonplaceholder.typicode.com/posts/1"

	req, _ := http.NewRequest("GET", url, nil)

	req.Header.Add("cache-control", "no-cache")
	req.Header.Set("Connection", "keep-alive")

	tr := &http.Transport{
		DisableKeepAlives: false,
	}

	http.DefaultClient.Transport = tr
	for i := 0; i < 2; i++ {
		res, _ := http.DefaultClient.Do(req)

		b, _ := httputil.DumpResponse(res, true)
		fmt.Println(string(b))

		defer dumpRemainingResponse(res)
		body, _ := ioutil.ReadAll(res.Body)

		fmt.Println(res)
		fmt.Println(string(body))

		fmt.Println(res)
		fmt.Println(string(body))
	}
}

func dumpRemainingResponse(res *http.Response) {
	if res != nil {
		io.Copy(ioutil.Discard, res.Body)
		res.Body.Close()
	}
}