From c1f9c2c957187b37bb88ea41fa19e418655e6d32 Mon Sep 17 00:00:00 2001
From: yusing <yusing.wys@gmail.com>
Date: Thu, 4 Dec 2025 17:27:26 +0800
Subject: [PATCH] fix(middleware): skip modification for HEAD requests in
 ModifyHTML middleware

---
 internal/net/gphttp/middleware/modify_html.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/internal/net/gphttp/middleware/modify_html.go b/internal/net/gphttp/middleware/modify_html.go
index c0c9d91d..3557e884 100644
--- a/internal/net/gphttp/middleware/modify_html.go
+++ b/internal/net/gphttp/middleware/modify_html.go
@@ -40,6 +40,10 @@ func (eofReader) Close() error             { return nil }
 
 // modifyResponse implements ResponseModifier.
 func (m *modifyHTML) modifyResponse(resp *http.Response) error {
+	// Skip HEAD requests - no body to modify
+	if resp.Request.Method == http.MethodHead {
+		return nil
+	}
 	// including text/html and application/xhtml+xml
 	if !httputils.GetContentType(resp.Header).IsHTML() {
 		return nil