golang tls connection with TLS 1.2

tls_test.go

package onboarding_test

import (
	"crypto/tls"
	"log"
	"net"
	"net/http"
	"testing"
)

func TestTls(t *testing.T) {
	var (
		conn *tls.Conn
		err  error
	)

	// tlsConfig := http.DefaultTransport.(*http.Transport).TLSClientConfig
	tlsConfig := &tls.Config{
		MaxVersion: tls.VersionTLS12,
	}
	// tlsConfig.MaxVersion = tls.VersionTLS12

	c := &http.Client{
		Transport: &http.Transport{
			DialTLS: func(network, addr string) (net.Conn, error) {
				conn, err = tls.Dial(network, addr, tlsConfig)
				return conn, err
			},
		},
	}

	res, err := c.Get("https://edesoft.com")
	if err != nil {
		log.Fatal(err)
	}

	versions := map[uint16]string{
		tls.VersionSSL30: "SSL",
		tls.VersionTLS10: "TLS 1.0",
		tls.VersionTLS11: "TLS 1.1",
		tls.VersionTLS12: "TLS 1.2",
		tls.VersionTLS13: "TLS 1.3",
	}

	t.Log(res.Request.URL)
	t.Log(res.Status)

	v := conn.ConnectionState().Version
	t.Logf("version: %d", v)
	t.Log(versions[v])

	res.Body.Close()
}

// Output:
// https://edesoft.com
// 200 OK
// version: 771
// TLS 1.2