From 46a42c738ae25be84b248f7a433964be78749eea Mon Sep 17 00:00:00 2001
From: doe1080 <98906116+doe1080@users.noreply.github.com>
Date: Thu, 26 Jun 2025 12:44:28 +0900
Subject: [PATCH] require

Co-authored-by: bashonly <88596187+bashonly@users.noreply.github.com>
---
 yt_dlp/extractor/niconico.py | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/yt_dlp/extractor/niconico.py b/yt_dlp/extractor/niconico.py
index b0885d34f..7a0628b4b 100644
--- a/yt_dlp/extractor/niconico.py
+++ b/yt_dlp/extractor/niconico.py
@@ -794,11 +794,7 @@ def _real_extract(self, url):
             {extract_attributes}, 'data-props', {json.loads}))
         frontend_id = traverse_obj(embedded_data, ('site', 'frontendId', {str_or_none}), default='9')
 
-        if not (ws_url := traverse_obj(embedded_data, (
-            'site', 'relive', 'webSocketUrl', {url_or_none},
-        ))):
-            raise ExtractorError('Unable to fetch WebSocket URL', expected=True)
-
+        ws_url = traverse_obj(embedded_data, ('site', 'relive', 'webSocketUrl', {url_or_none}, {require('websocket URL')}))
         ws_url = update_url_query(ws_url, {'frontend_id': frontend_id})
         ws = self._request_webpage(
             ws_url, video_id, 'Connecting to WebSocket server',