기타 개선

app/main.py

@@ -12,7 +12,10 @@ app = web.Application()
 async def get_widgets(request):
     widget_id = request.match_info['widget_id']
     subscribers = toonat.get_subscribers(widget_id)
-    return web.json_response(subscribers)
+    if subscribers:
+        return web.json_response(subscribers)
+    else:
+        return web.Response(text=f"no subscribers")
 
 @routes.get('/subscribe/{widget_id}')
 async def subscribe(request):
@@ -46,7 +49,10 @@ async def get_widgets(request):
     현재 설정된 모든 위젯 ID 목록을 반환하는 웹 API 엔드포인트입니다.
     """
     widget_ids = toonat.get_widget_ids()
-    return web.json_response(widget_ids)
+    if widget_ids:
+        return web.json_response(widget_ids)
+    else:
+        return web.Response(text=f"no widget_ids")
 
 
 @routes.get('/add_widget')