[ie/LiTV] Fix extractor (#7785)

Closes #5456
Authored by: jiru

yt_dlp/extractor/litv.py

@@ -13,24 +13,26 @@
 class LiTVIE(InfoExtractor):
     _VALID_URL = r'https?://(?:www\.)?litv\.tv/(?:vod|promo)/[^/]+/(?:content\.do)?\?.*?\b(?:content_)?id=(?P<id>[^&]+)'
 
-    _URL_TEMPLATE = 'https://www.litv.tv/vod/%s/content.do?id=%s'
+    _URL_TEMPLATE = 'https://www.litv.tv/vod/%s/content.do?content_id=%s'
 
     _TESTS = [{
         'url': 'https://www.litv.tv/vod/drama/content.do?brc_id=root&id=VOD00041610&isUHEnabled=true&autoPlay=1',
         'info_dict': {
             'id': 'VOD00041606',
             'title': '花千骨',
         },
-        'playlist_count': 50,
+        'playlist_count': 51,  # 50 episodes + 1 trailer
     }, {
         'url': 'https://www.litv.tv/vod/drama/content.do?brc_id=root&id=VOD00041610&isUHEnabled=true&autoPlay=1',
-        'md5': '969e343d9244778cb29acec608e53640',
+        'md5': 'b90ff1e9f1d8f5cfcd0a44c3e2b34c7a',
         'info_dict': {
             'id': 'VOD00041610',
             'ext': 'mp4',
             'title': '花千骨第1集',
             'thumbnail': r're:https?://.*\.jpg$',
-            'description': 'md5:c7017aa144c87467c4fb2909c4b05d6f',
+            'description': '《花千骨》陸劇線上看。十六年前，平靜的村莊內，一名女嬰隨異相出生，途徑此地的蜀山掌門清虛道長算出此女命運非同一般，她體內散發的異香易招惹妖魔。一念慈悲下，他在村莊周邊設下結界阻擋妖魔入侵，讓其年滿十六後去蜀山，並賜名花千骨。',
+            'categories': ['奇幻', '愛情', '中國', '仙俠'],
+            'episode': 'Episode 1',
             'episode_number': 1,
         },
         'params': {
@@ -46,20 +48,17 @@ class LiTVIE(InfoExtractor):
             'title': '芈月傳第1集　霸星芈月降世楚國',
             'description': '楚威王二年，太史令唐昧夜觀星象，發現霸星即將現世。王后得知霸星的預言後，想盡辦法不讓孩子順利出生，幸得莒姬相護化解危機。沒想到眾人期待下出生的霸星卻是位公主，楚威王對此失望至極。楚王后命人將女嬰丟棄河中，居然奇蹟似的被少司命像攔下，楚威王認為此女非同凡響，為她取名芈月。',
         },
-        'skip': 'Georestricted to Taiwan',
+        'skip': 'No longer exists',
     }]
 
-    def _extract_playlist(self, season_list, video_id, program_info, prompt=True):
-        episode_title = program_info['title']
-        content_id = season_list['contentId']
-
+    def _extract_playlist(self, playlist_data, content_type):
         all_episodes = [
             self.url_result(smuggle_url(
-                self._URL_TEMPLATE % (program_info['contentType'], episode['contentId']),
+                self._URL_TEMPLATE % (content_type, episode['contentId']),
                 {'force_noplaylist': True}))  # To prevent infinite recursion
-            for episode in season_list['episode']]
+            for episode in traverse_obj(playlist_data, ('seasons', ..., 'episode', lambda _, v: v['contentId']))]
 
-        return self.playlist_result(all_episodes, content_id, episode_title)
+        return self.playlist_result(all_episodes, playlist_data['contentId'], playlist_data.get('title'))
 
     def _real_extract(self, url):
         url, smuggled_data = unsmuggle_url(url, {})
@@ -68,24 +67,31 @@ def _real_extract(self, url):
 
         webpage = self._download_webpage(url, video_id)
 
+        if self._search_regex(
+                r'(?i)<meta\s[^>]*http-equiv="refresh"\s[^>]*content="[0-9]+;\s*url=https://www\.litv\.tv/"',
+                webpage, 'meta refresh redirect', default=False, group=0):
+            raise ExtractorError('No such content found', expected=True)
+
         program_info = self._parse_json(self._search_regex(
             r'var\s+programInfo\s*=\s*([^;]+)', webpage, 'VOD data', default='{}'),
             video_id)
 
-        season_list = list(program_info.get('seasonList', {}).values())
-        playlist_id = traverse_obj(season_list, 0, 'contentId')
-        if self._yes_playlist(playlist_id, video_id, smuggled_data):
-            return self._extract_playlist(season_list[0], video_id, program_info)
-
-        # In browsers `getMainUrl` request is always issued. Usually this
+        # In browsers `getProgramInfo` request is always issued. Usually this
         # endpoint gives the same result as the data embedded in the webpage.
-        # If georestricted, there are no embedded data, so an extra request is
-        # necessary to get the error code
+        # If, for some reason, there are no embedded data, we do an extra request.
         if 'assetId' not in program_info:
             program_info = self._download_json(
                 'https://www.litv.tv/vod/ajax/getProgramInfo', video_id,
                 query={'contentId': video_id},
                 headers={'Accept': 'application/json'})
+
+        series_id = program_info['seriesId']
+        if self._yes_playlist(series_id, video_id, smuggled_data):
+            playlist_data = self._download_json(
+                'https://www.litv.tv/vod/ajax/getSeriesTree', video_id,
+                query={'seriesId': series_id}, headers={'Accept': 'application/json'})
+            return self._extract_playlist(playlist_data, program_info['contentType'])
+
         video_data = self._parse_json(self._search_regex(
             r'uiHlsUrl\s*=\s*testBackendData\(([^;]+)\);',
             webpage, 'video data', default='{}'), video_id)
@@ -96,7 +102,7 @@ def _real_extract(self, url):
                 'contentType': program_info['contentType'],
             }
             video_data = self._download_json(
-                'https://www.litv.tv/vod/getMainUrl', video_id,
+                'https://www.litv.tv/vod/ajax/getMainUrlNoAuth', video_id,
                 data=json.dumps(payload).encode('utf-8'),
                 headers={'Content-Type': 'application/json'})