fix: tls conn nil pointer

terasu_test.go

@@ -8,7 +8,7 @@ import (
 	"testing"
 )
 
-func TestHTTPDialTLS(t *testing.T) {
+func TestHTTPDialTLS13(t *testing.T) {
 	cli := http.Client{
 		Transport: &http.Transport{
 			DialTLS: func(network, addr string) (net.Conn, error) {
@@ -38,3 +38,35 @@ func TestHTTPDialTLS(t *testing.T) {
 	}
 	t.Log(string(data))
 }
+
+func TestHTTPDialTLS12(t *testing.T) {
+	cli := http.Client{
+		Transport: &http.Transport{
+			DialTLS: func(network, addr string) (net.Conn, error) {
+				conn, err := net.Dial("tcp", "18.65.159.2:443")
+				if err != nil {
+					return nil, err
+				}
+				t.Log("net.Dial succeeded")
+				return Use(tls.Client(conn, &tls.Config{
+					ServerName:         "huggingface.co",
+					InsecureSkipVerify: true,
+					MaxVersion:         tls.VersionTLS12,
+				})), nil
+			},
+		},
+	}
+	resp, err := cli.Get("https://huggingface.co/")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer resp.Body.Close()
+	if resp.StatusCode != http.StatusOK {
+		t.Fatal("status code:", resp.StatusCode)
+	}
+	data, err := io.ReadAll(resp.Body)
+	if err != nil {
+		t.Fatal(err)
+	}
+	t.Log(string(data))
+}