fix: better unavailability check (2)

yt_dlp/extractor/vk.py

@@ -832,19 +832,20 @@ class VKMusicBaseIE(VKBaseIE):
         }
 
     def _raise_if_blocked(self, meta, track_id):
+        if len(meta) < 12:
+            return None
+
         reason = traverse_obj(
-            self._parse_json(
-                meta[12] if len(meta) >= 12 else None,
-                track_id, fatal=False),
+            self._parse_json(meta[12], track_id, fatal=False),
             ('claim', 'reason'))
 
-        if reason == 'geo':
-            self.raise_geo_restricted()
-        # can be an empty string
-        elif reason is not None:
+        if reason is not None:
+            if reason == 'geo':
+                self.raise_geo_restricted()
+
+            # an empty string or an internal ID
             raise ExtractorError(
-                'This track is unavailable. '
-                f'Reason code: {reason:r}')
+                f'This track is unavailable. Reason code: {reason:r}')
 
 
 class VKMusicTrackIE(VKMusicBaseIE):
@@ -868,7 +869,7 @@ class VKMusicTrackIE(VKMusicBaseIE):
                 'uploader': 'Skillet',
                 'artists': ['Skillet'],
                 'duration': 230,
-                'thumbnail': r're:https?://.*\.jpg',
+                'thumbnail': r're:^https?://.*\.jpg',
                 'age_limit': 0,
             },
             'params': {
@@ -886,7 +887,7 @@ class VKMusicTrackIE(VKMusicBaseIE):
                 'uploader': 'Pusha T, Stormzy',
                 'artists': ['Pusha T', 'Stormzy'],
                 'duration': 211,
-                'thumbnail': r're:https?://.*\.jpg',
+                'thumbnail': r're:^https?://.*\.jpg',
                 'age_limit': 0,
             },
             'params': {
@@ -903,7 +904,7 @@ class VKMusicTrackIE(VKMusicBaseIE):
                 'uploader': 'Linkin Park feat. Page Hamilton',
                 'artists': ['Linkin Park', 'Page Hamilton'],
                 'duration': 213,
-                'thumbnail': r're:https?://.*\.jpg',
+                'thumbnail': r're:^https?://.*\.jpg',
                 'age_limit': 18,
             },
             'params': {
@@ -937,7 +938,7 @@ class VKMusicTrackIE(VKMusicBaseIE):
                 'uploader': 'Jack Thomas feat. Nico & Vinz',
                 'artists': ['Jack Thomas', 'Nico & Vinz'],
                 'duration': 207,
-                'thumbnail': r're:https?://.*\.jpg',
+                'thumbnail': r're:^https?://.*\.jpg',
                 'age_limit': 0,
             },
             'params': {
@@ -950,6 +951,7 @@ class VKMusicTrackIE(VKMusicBaseIE):
         mobj = self._match_valid_url(url)
         track_id = mobj.group('id')
         access_hash = mobj.group('hash')
+        vk_id = self._parse_vk_id()
 
         if not access_hash:
             webpage = self._download_webpage(
@@ -963,7 +965,7 @@ class VKMusicTrackIE(VKMusicBaseIE):
             if data_audio:
                 meta = self._parse_json(unescapeHTML(data_audio), track_id)
             else:
-                if self._parse_vk_id() == 0:
+                if vk_id == 0:
                     self.raise_login_required(
                         'This track is unavailable. '
                         'Log in or provide a link with access hash')
@@ -985,18 +987,18 @@ class VKMusicTrackIE(VKMusicBaseIE):
 
             access_hash = meta[24]
 
-        meta = self._download_payload('al_audio', track_id, {
-            'act': 'reload_audios',
-            'audio_ids': f'{track_id}_{access_hash}',
-        })[0]
+        try:
+            meta = self._download_payload('al_audio', track_id, {
+                'act': 'reload_audios',
+                'audio_ids': f'{track_id}_{access_hash}',
+            })[0][0]
+        except (ExtractorError, IndexError):
+            if vk_id == 0:
+                self.raise_login_required()
+            raise ExtractorError('This track is unavailable')
 
-        # vk sends an empty list when auth required
-        if not meta:
-            self.raise_login_required()
-
-        meta = meta[0]
         self._raise_if_blocked(meta, track_id)
-        url = self._unmask_url(meta[2], self._parse_vk_id())
+        url = self._unmask_url(meta[2], vk_id)
 
         return {
             **self._parse_track_meta(meta, track_id),
@@ -1033,7 +1035,7 @@ class VKMusicPlaylistIE(VKMusicBaseIE):
                 'album': 'One More Light',
                 'uploader': 'Linkin Park',
                 'artists': ['Linkin Park'],
-                'thumbnails': [{'url': r're:https?://.*\.jpg'}],
+                'thumbnails': [{'url': r're:^https?://.*\.jpg'}],
                 'genres': ['Alternative'],
                 'release_year': 2017,
             },
@@ -1042,6 +1044,20 @@ class VKMusicPlaylistIE(VKMusicBaseIE):
                 'skip_download': True,
             },
         },
+        {
+            'note': 'special symbols must be unescaped',
+            'url': 'https://vk.com/music/playlist/-25611523_85178143',
+            'info_dict': {
+                'id': '-25611523_85178143',
+                'title': 'Mondträume – Lovers, Sinners & Liars (2019, Alfa Matrix)',
+                'uploader': 'E:\\music\\futurepop',
+                'thumbnails': [{'url': r're:^https?://.*\.jpg'}],
+            },
+            'playlist_count': 22,
+            'params': {
+                'skip_download': True,
+            },
+        },
         {
             'url': 'https://vk.com/audios877252112?block=playlists&section=general&z=audio_playlist-147845620_2390',
             'info_dict': {
@@ -1049,7 +1065,7 @@ class VKMusicPlaylistIE(VKMusicBaseIE):
                 'title': 'VK Fest 2024: Белая сцена',
                 'description': 'md5:6d652551bb1faaddbcd46321a77fa8d0',
                 'uploader': 'VK Музыка',
-                'thumbnails': [{'url': r're:https?://.*\.jpg'}],
+                'thumbnails': [{'url': r're:^https?://.*\.jpg'}],
             },
             'playlist_count': 18,
             'params': {
@@ -1063,7 +1079,7 @@ class VKMusicPlaylistIE(VKMusicBaseIE):
                 'title': 'Электроника: новинки',
                 'description': 're:^Актуальные новинки электронной музыки',
                 'uploader': 'VK Музыка',
-                'thumbnails': [{'url': r're:https?://.*\.jpg'}],
+                'thumbnails': [{'url': r're:^https?://.*\.jpg'}],
             },
             'playlist_mincount': 100,
             'params': {