[bunkr] fail downloads for 'maintenance' files (#5952)

gallery_dl/extractor/bunkr.py

@@ -55,6 +55,7 @@ def fetch_album(self, album_id):
             "album_name" : text.unescape(info[0]),
             "album_size" : size[1:-1],
             "count"      : len(urls),
+            "_http_validate": self._validate,
         }
 
     def _extract_files(self, urls):
@@ -74,6 +75,12 @@ def _extract_file(self, url):
             text.rextract(page, ' href="', '"', page.rindex("Download"))[0]
         )
 
+    def _validate(self, response):
+        if response.history and response.url.endswith("/maintenance-vid.mp4"):
+            self.log.warning("File server in maintenance mode")
+            return False
+        return True
+
 
 class BunkrMediaExtractor(BunkrAlbumExtractor):
     """Extractor for bunkr.sk media links"""
@@ -95,4 +102,5 @@ def fetch_album(self, album_id):
             "album_size" : -1,
             "description": "",
             "count"      : 1,
+            "_http_validate": self._validate,
         }