client.go

package main

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

func main() {
	keylogPath := os.Getenv("SSLKEYLOGFILE")
	var keylogWriter io.Writer
	if keylogPath != "" {
		f, err := os.OpenFile(keylogPath, os.O_WRONLY|os.O_CREATE, 0600)
		if err != nil {
			log.Fatalf("failed to open keylog file: %v", err)
		}
		defer f.Close()
		keylogWriter = f
	}

	tlsConfig := &tls.Config{
		InsecureSkipVerify: true,
		KeyLogWriter:       keylogWriter,
	}

	transport := &http.Transport{
		TLSClientConfig:   tlsConfig,
		ForceAttemptHTTP2: true,
		MaxConnsPerHost:   1,
	}

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

	resp, err := client.Get("https://localhost:8443")
	if err != nil {
		log.Fatalf("failed to make request: %v", err)
	}
	defer resp.Body.Close()

	fmt.Printf("response status: %s\n", resp.Status)

	resp, err = client.Get("https://localhost:8443")
	if err != nil {
		log.Fatalf("failed to make request: %v", err)
	}
	defer resp.Body.Close()

	fmt.Printf("response status: %s\n", resp.Status)
}