From a8581e488bec880ea9ab6c69a4819ab828985cde Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Wed, 3 Jun 2026 19:13:09 +0000
Subject: [PATCH] Make HEAD endpoint consistent with GET: return 404 when files
 list is empty

Co-authored-by: gantoine <3247106+gantoine@users.noreply.github.com>
---
 backend/endpoints/roms/__init__.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/backend/endpoints/roms/__init__.py b/backend/endpoints/roms/__init__.py
index 6374a4436..f31fcaf1b 100644
--- a/backend/endpoints/roms/__init__.py
+++ b/backend/endpoints/roms/__init__.py
@@ -868,6 +868,12 @@ async def head_rom_content(
         files = [f for f in files if f.id in file_id_values]
     files.sort(key=lambda x: x.file_name)
 
+    if not files:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail=f"No files found for ROM {id}",
+        )
+
     # Serve the file directly in development mode for emulatorjs
     if DEV_MODE:
         if len(files) == 1: