From 827044f804bcae8794c29e709b96b764c5182384 Mon Sep 17 00:00:00 2001
From: okapui <92432738+okapui@users.noreply.github.com>
Date: Tue, 24 Feb 2026 03:20:19 +0900
Subject: [PATCH] Include Content-Length in 404 response (#1393)

---
 .../Demo_IP_Protocols/HTTP_Server/FreeRTOS_HTTP_server.c       | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/FreeRTOS-Plus/Demo/Common/Demo_IP_Protocols/HTTP_Server/FreeRTOS_HTTP_server.c b/FreeRTOS-Plus/Demo/Common/Demo_IP_Protocols/HTTP_Server/FreeRTOS_HTTP_server.c
index d61f241ec78..93d62d8b9f0 100644
--- a/FreeRTOS-Plus/Demo/Common/Demo_IP_Protocols/HTTP_Server/FreeRTOS_HTTP_server.c
+++ b/FreeRTOS-Plus/Demo/Common/Demo_IP_Protocols/HTTP_Server/FreeRTOS_HTTP_server.c
@@ -297,6 +297,9 @@
 
         if( pxClient->pxFileHandle == NULL )
         {
+            snprintf( pxClient->pxParent->pcExtraContents, sizeof( pxClient->pxParent->pcExtraContents ),
+                      "Content-Length: 0\r\n" );
+
             /* "404 File not found". */
             xRc = prvSendReply( pxClient, WEB_NOT_FOUND );
         }