From b001639ee8d4cf96dfc804c3e057965f22b35157 Mon Sep 17 00:00:00 2001
From: Sergey Ponomarev <stokito@gmail.com>
Date: Thu, 8 Jan 2026 02:23:27 +0200
Subject: [PATCH] SPARK-2380: insertPicture(): fix Accept header

---
 core/src/main/java/org/jivesoftware/spark/ui/MessageEntry.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/core/src/main/java/org/jivesoftware/spark/ui/MessageEntry.java b/core/src/main/java/org/jivesoftware/spark/ui/MessageEntry.java
index 33bbfed03..f7274a631 100644
--- a/core/src/main/java/org/jivesoftware/spark/ui/MessageEntry.java
+++ b/core/src/main/java/org/jivesoftware/spark/ui/MessageEntry.java
@@ -382,7 +382,7 @@ public class MessageEntry extends TimeStampedEntry
                          .build()
             ) {
                 final ClassicHttpRequest request = ClassicRequestBuilder.get(url)
-                    .setHeader("Content-Type", "image/*")
+                    .setHeader("Accept", "image/*")
                     .setHeader("User-Agent", "Spark HttpFileUpload")
                     .build();