From c1d06e3d08692f9eddde381a5e277b41fff5a297 Mon Sep 17 00:00:00 2001
From: David Desmarais-Michaud <desmarais.michaud.david@gmail.com>
Date: Sun, 12 Feb 2023 00:01:43 -0500
Subject: [PATCH] add supprt for go1.20 http.rwUnwrapper to gin.responseWriter
 (#3489)

---
 response_writer.go      | 4 ++++
 response_writer_test.go | 6 ++++++
 2 files changed, 10 insertions(+)

diff --git a/response_writer.go b/response_writer.go
index 5cec1f6616..753a0b09ab 100644
--- a/response_writer.go
+++ b/response_writer.go
@@ -51,6 +51,10 @@ type responseWriter struct {
 
 var _ ResponseWriter = (*responseWriter)(nil)
 
+func (w *responseWriter) Unwrap() http.ResponseWriter {
+	return w.ResponseWriter
+}
+
 func (w *responseWriter) reset(writer http.ResponseWriter) {
 	w.ResponseWriter = writer
 	w.size = noWritten
diff --git a/response_writer_test.go b/response_writer_test.go
index 6fa5ec719c..9fd5e87cce 100644
--- a/response_writer_test.go
+++ b/response_writer_test.go
@@ -30,6 +30,12 @@ func init() {
 	SetMode(TestMode)
 }
 
+func TestResponseWriterUnwrap(t *testing.T) {
+	testWriter := httptest.NewRecorder()
+	writer := &responseWriter{ResponseWriter: testWriter}
+	assert.Same(t, testWriter, writer.Unwrap())
+}
+
 func TestResponseWriterReset(t *testing.T) {
 	testWriter := httptest.NewRecorder()
 	writer := &responseWriter{}