[extractor/odkmedia] Add `OnDemandChinaEpisodeIE` (#6116)

Authored by: HobbyistDev, pukkandan

yt_dlp/extractor/_extractors.py

@@ -1292,6 +1292,7 @@ from .nzherald import NZHeraldIE
 from .nzonscreen import NZOnScreenIE
 from .nzz import NZZIE
 from .odatv import OdaTVIE
+from .odkmedia import OnDemandChinaEpisodeIE
 from .odnoklassniki import OdnoklassnikiIE
 from .oftv import (
     OfTVIE,

yt_dlp/extractor/odkmedia.py

@@ -0,0 +1,105 @@
+import json
+import urllib.error
+
+from .common import InfoExtractor
+from ..utils import (
+    ExtractorError,
+    GeoRestrictedError,
+    float_or_none,
+    traverse_obj,
+    try_call
+)
+
+
+class OnDemandChinaEpisodeIE(InfoExtractor):
+    _VALID_URL = r'https?://www\.ondemandchina\.com/\w+/watch/(?P<series>[\w-]+)/(?P<id>ep-(?P<ep>\d+))'
+    _TESTS = [{
+        'url': 'https://www.ondemandchina.com/en/watch/together-against-covid-19/ep-1',
+        'info_dict': {
+            'id': '264394',
+            'ext': 'mp4',
+            'duration': 3256.88,
+            'title': 'EP 1 The Calling',
+            'alt_title': '第1集 令出如山',
+            'thumbnail': 'https://d2y2efdi5wgkcl.cloudfront.net/fit-in/256x256/media-io/2020/9/11/image.d9816e81.jpg',
+            'description': '疫情严峻，党政军民学、东西南北中协同应考',
+            'tags': ['Social Humanities', 'Documentary', 'Medical', 'Social'],
+        }
+    }]
+
+    _QUERY = '''
+        query Episode($programSlug: String!, $episodeNumber: Int!) {
+            episode(
+                programSlug: $programSlug
+                episodeNumber: $episodeNumber
+                kind: "series"
+                part: null
+            ) {
+                id
+                title
+                titleEn
+                titleKo
+                titleZhHans
+                titleZhHant
+                synopsis
+                synopsisEn
+                synopsisKo
+                synopsisZhHans
+                synopsisZhHant
+                videoDuration
+                images {
+                    thumbnail
+                }
+            }
+        }'''
+
+    def _real_extract(self, url):
+        program_slug, display_id, ep_number = self._match_valid_url(url).group('series', 'id', 'ep')
+        webpage = self._download_webpage(url, display_id)
+
+        video_info = self._download_json(
+            'https://odc-graphql.odkmedia.io/graphql', display_id,
+            headers={'Content-type': 'application/json'},
+            data=json.dumps({
+                'operationName': 'Episode',
+                'query': self._QUERY,
+                'variables': {
+                    'programSlug': program_slug,
+                    'episodeNumber': int(ep_number),
+                },
+            }).encode())['data']['episode']
+
+        try:
+            source_json = self._download_json(
+                f'https://odkmedia.io/odc/api/v2/playback/{video_info["id"]}/', display_id,
+                headers={'Authorization': '', 'service-name': 'odc'})
+        except ExtractorError as e:
+            if isinstance(e.cause, urllib.error.HTTPError):
+                error_data = self._parse_json(e.cause.read(), display_id)['detail']
+                raise GeoRestrictedError(error_data)
+
+        formats, subtitles = [], {}
+        for source in traverse_obj(source_json, ('sources', ...)):
+            if source.get('type') == 'hls':
+                fmts, subs = self._extract_m3u8_formats_and_subtitles(source.get('url'), display_id)
+                formats.extend(fmts)
+                self._merge_subtitles(subs, target=subtitles)
+            else:
+                self.report_warning(f'Unsupported format {source.get("type")}', display_id)
+
+        return {
+            'id': str(video_info['id']),
+            'duration': float_or_none(video_info.get('videoDuration'), 1000),
+            'thumbnail': (traverse_obj(video_info, ('images', 'thumbnail'))
+                          or self._html_search_meta(['og:image', 'twitter:image'], webpage)),
+            'title': (traverse_obj(video_info, 'title', 'titleEn')
+                      or self._html_search_meta(['og:title', 'twitter:title'], webpage)
+                      or self._html_extract_title(webpage)),
+            'alt_title': traverse_obj(video_info, 'titleKo', 'titleZhHans', 'titleZhHant'),
+            'description': (traverse_obj(
+                video_info, 'synopsisEn', 'synopsisKo', 'synopsisZhHans', 'synopsisZhHant', 'synopisis')
+                or self._html_search_meta(['og:description', 'twitter:description', 'description'], webpage)),
+            'formats': formats,
+            'subtitles': subtitles,
+            'tags': try_call(lambda: self._html_search_meta('keywords', webpage).split(', '))
+        }