From c8d6e88b6fc818d94f56d38be0a77517527cd3fa Mon Sep 17 00:00:00 2001
From: koenno <8572607+koenno@users.noreply.github.com>
Date: Wed, 25 Sep 2024 14:42:30 +0200
Subject: [PATCH] discard gzip footer when empty body

---
 handler.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/handler.go b/handler.go
index fccfa93..ee9eb9f 100644
--- a/handler.go
+++ b/handler.go
@@ -54,6 +54,10 @@ func (g *gzipHandler) Handle(c *gin.Context) {
 	c.Header("Vary", "Accept-Encoding")
 	c.Writer = &gzipWriter{c.Writer, gz}
 	defer func() {
+		if c.Writer.Size() < 0 {
+			// do not write gzip footer when nothing is written to the response body
+			gz.Reset(io.Discard)
+		}
 		gz.Close()
 		c.Header("Content-Length", fmt.Sprint(c.Writer.Size()))
 	}()