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youtube-dl

[mirror] Download/Watch videos from video hostersgit clone https://hacktivis.me/git/mirror/youtube-dl.git

khanacademy.py (3919B)

    

  1. from __future__ import unicode_literals
  3. import json
  5. from .common import InfoExtractor
  6. from ..utils import (
  7.     int_or_none,
  8.     parse_iso8601,
  9.     try_get,
  10. )
  13. class KhanAcademyBaseIE(InfoExtractor):
  14.     _VALID_URL_TEMPL = r'https?://(?:www\.)?khanacademy\.org/(?P<id>(?:[^/]+/){%s}%s[^?#/&]+)'
  16.     def _parse_video(self, video):
  17.         return {
  18.             '_type': 'url_transparent',
  19.             'url': video['youtubeId'],
  20.             'id': video.get('slug'),
  21.             'title': video.get('title'),
  22.             'thumbnail': video.get('imageUrl') or video.get('thumbnailUrl'),
  23.             'duration': int_or_none(video.get('duration')),
  24.             'description': video.get('description'),
  25.             'ie_key': 'Youtube',
  26.         }
  28.     def _real_extract(self, url):
  29.         display_id = self._match_id(url)
  30.         component_props = self._parse_json(self._download_json(
  31.             'https://www.khanacademy.org/api/internal/graphql',
  32.             display_id, query={
  33.                 'hash': 1604303425,
  34.                 'variables': json.dumps({
  35.                     'path': display_id,
  36.                     'queryParams': '',
  37.                 }),
  38.             })['data']['contentJson'], display_id)['componentProps']
  39.         return self._parse_component_props(component_props)
  42. class KhanAcademyIE(KhanAcademyBaseIE):
  43.     IE_NAME = 'khanacademy'
  44.     _VALID_URL = KhanAcademyBaseIE._VALID_URL_TEMPL % ('4', 'v/')
  45.     _TEST = {
  46.         'url': 'https://www.khanacademy.org/computing/computer-science/cryptography/crypt/v/one-time-pad',
  47.         'md5': '9c84b7b06f9ebb80d22a5c8dedefb9a0',
  48.         'info_dict': {
  49.             'id': 'FlIG3TvQCBQ',
  50.             'ext': 'mp4',
  51.             'title': 'The one-time pad',
  52.             'description': 'The perfect cipher',
  53.             'duration': 176,
  54.             'uploader': 'Brit Cruise',
  55.             'uploader_id': 'khanacademy',
  56.             'upload_date': '20120411',
  57.             'timestamp': 1334170113,
  58.             'license': 'cc-by-nc-sa',
  59.         },
  60.         'add_ie': ['Youtube'],
  61.     }
  63.     def _parse_component_props(self, component_props):
  64.         video = component_props['tutorialPageData']['contentModel']
  65.         info = self._parse_video(video)
  66.         author_names = video.get('authorNames')
  67.         info.update({
  68.             'uploader': ', '.join(author_names) if author_names else None,
  69.             'timestamp': parse_iso8601(video.get('dateAdded')),
  70.             'license': video.get('kaUserLicense'),
  71.         })
  72.         return info
  75. class KhanAcademyUnitIE(KhanAcademyBaseIE):
  76.     IE_NAME = 'khanacademy:unit'
  77.     _VALID_URL = (KhanAcademyBaseIE._VALID_URL_TEMPL % ('2', '')) + '/?(?:[?#&]|$)'
  78.     _TEST = {
  79.         'url': 'https://www.khanacademy.org/computing/computer-science/cryptography',
  80.         'info_dict': {
  81.             'id': 'cryptography',
  82.             'title': 'Cryptography',
  83.             'description': 'How have humans protected their secret messages through history? What has changed today?',
  84.         },
  85.         'playlist_mincount': 31,
  86.     }
  88.     def _parse_component_props(self, component_props):
  89.         curation = component_props['curation']
  91.         entries = []
  92.         tutorials = try_get(curation, lambda x: x['tabs'][0]['modules'][0]['tutorials'], list) or []
  93.         for tutorial_number, tutorial in enumerate(tutorials, 1):
  94.             chapter_info = {
  95.                 'chapter': tutorial.get('title'),
  96.                 'chapter_number': tutorial_number,
  97.                 'chapter_id': tutorial.get('id'),
  98.             }
  99.             for content_item in (tutorial.get('contentItems') or []):
  100.                 if content_item.get('kind') == 'Video':
  101.                     info = self._parse_video(content_item)
  102.                     info.update(chapter_info)
  103.                     entries.append(info)
  105.         return self.playlist_result(
  106.             entries, curation.get('unit'), curation.get('title'),
  107.             curation.get('description'))