reuse response Body in Golang

main.go

	// read the response body to a variable
	bodyBytes, _ := ioutil.ReadAll(response.Body)
	// Use io.Copy to just dump the response body to the file. This supports huge files
	err := ioutil.WriteFile("tmp/asdf.png", bodyBytes, 0644)
	if err != nil {
		log.Fatal(err)
	}
	fmt.Println("Captcha image saving success!")
	//reset the response body to the original unread state
	response.Body = ioutil.NopCloser(bytes.NewBuffer(bodyBytes))

it costs too much memory when the response body is a huge file