From 1c9ea0113d007d57bb8f793ebe7a64a3dcad7bc7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?K=C3=A9vin=20Dunglas?= <kevin@dunglas.fr>
Date: Thu, 27 Apr 2023 01:44:01 +0200
Subject: caddyhttp: Impl `ResponseWriter.Unwrap()`, prep for Go 1.20's
 `ResponseController` (#5509)

* feat: add support for ResponseWriter.Unwrap()

* cherry-pick Francis' code
---
 modules/caddyhttp/encode/encode.go | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'modules/caddyhttp/encode')

diff --git a/modules/caddyhttp/encode/encode.go b/modules/caddyhttp/encode/encode.go
index 8a6fc10..78d440e 100644
--- a/modules/caddyhttp/encode/encode.go
+++ b/modules/caddyhttp/encode/encode.go
@@ -299,6 +299,11 @@ func (rw *responseWriter) Close() error {
 	return err
 }
 
+// Unwrap returns the underlying ResponseWriter.
+func (rw *responseWriter) Unwrap() http.ResponseWriter {
+	return rw.HTTPInterfaces
+}
+
 // init should be called before we write a response, if rw.buf has contents.
 func (rw *responseWriter) init() {
 	if rw.Header().Get("Content-Encoding") == "" && isEncodeAllowed(rw.Header()) &&
-- 
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