From 649e0b65cf0b89618ffa05f826f5f1c2f6bb72f8 Mon Sep 17 00:00:00 2001
From: Chris Lu <chrislusf@users.noreply.github.com>
Date: Wed, 26 Nov 2025 16:57:51 -0800
Subject: [PATCH] Update weed/s3api/s3api_object_handlers.go

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>
---
 weed/s3api/s3api_object_handlers.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/weed/s3api/s3api_object_handlers.go b/weed/s3api/s3api_object_handlers.go
index 264b1cf7e..1406bbf42 100644
--- a/weed/s3api/s3api_object_handlers.go
+++ b/weed/s3api/s3api_object_handlers.go
@@ -1981,7 +1981,7 @@ func (s3a *S3ApiServer) setResponseHeaders(w http.ResponseWriter, r *http.Reques
 	// This allows presigned URLs to control how browsers handle the downloaded content
 	if r != nil {
 		for queryParam, headerValue := range r.URL.Query() {
-			if normalizedHeader, ok := s3_constants.PassThroughHeaders[strings.ToLower(queryParam)]; ok && len(headerValue) > 0 {
+			if normalizedHeader, ok := s3_constants.PassThroughHeaders[strings.ToLower(queryParam)]; ok && len(headerValue) > 0 && headerValue[0] != "" {
 				w.Header().Set(normalizedHeader, headerValue[0])
 			}
 		}