Update app.py

app.py

@@ -6,6 +6,12 @@ from tinydb import TinyDB, Query
 import datetime
 from bs4 import BeautifulSoup
 
+def is_valid_html(html):
+    with warnings.catch_warnings(record=True) as w:
+        warnings.simplefilter('always')
+        BeautifulSoup(html, 'html.parser')
+        return len(w) == 0
+
 # データベースの初期化
 db = TinyDB("db.json")
 current_time = datetime.datetime.now()