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[ie/khanacademy] Fix extractors (#9136)

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Closes #8775
Authored by: c-basalt
pull/10097/head
c-basalt 5 months ago committed by GitHub
parent a0d9967f68
commit 4093eb1fcc
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1 changed files with 92 additions and 49 deletions
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141
yt_dlp/extractor/khanacademy.py
Unescape Escape View File

@ -3,43 +3,52 @@ import json
from .common import InfoExtractor
from ..utils import (
int_or_none,
make_archive_id,
parse_iso8601,
try_get,
str_or_none,
traverse_obj,
url_or_none,
urljoin,
)
class KhanAcademyBaseIE(InfoExtractor):
_VALID_URL_TEMPL = r'https?://(?:www\.)?khanacademy\.org/(?P<id>(?:[^/]+/){%s}%s[^?#/&]+)'
_PUBLISHED_CONTENT_VERSION = '171419ab20465d931b356f22d20527f13969bb70'
def _parse_video(self, video):
return {
'_type': 'url_transparent',
'url': video['youtubeId'],
'id': video.get('slug'),
'title': video.get('title'),
'thumbnail': video.get('imageUrl') or video.get('thumbnailUrl'),
'duration': int_or_none(video.get('duration')),
'description': video.get('description'),
'id': video['youtubeId'],
'ie_key': 'Youtube',
**traverse_obj(video, {
'display_id': ('id', {str_or_none}),
'title': ('translatedTitle', {str}),
'thumbnail': ('thumbnailUrls', ..., 'url', {url_or_none}),
'duration': ('duration', {int_or_none}),
'description': ('description', {str}),
}, get_all=False),
}
def _real_extract(self, url):
display_id = self._match_id(url)
content = self._download_json(
'https://www.khanacademy.org/api/internal/graphql/FetchContentData',
display_id, query={
'https://www.khanacademy.org/api/internal/graphql/ContentForPath', display_id,
query={
'fastly_cacheable': 'persist_until_publish',
'hash': '4134764944',
'lang': 'en',
'pcv': self._PUBLISHED_CONTENT_VERSION,
'hash': '1242644265',
'variables': json.dumps({
'path': display_id,
'queryParams': 'lang=en',
'isModal': False,
'followRedirects': True,
'countryCode': 'US',
'kaLocale': 'en',
'clientPublishedContentVersion': self._PUBLISHED_CONTENT_VERSION,
}),
})['data']['contentJson']
return self._parse_component_props(self._parse_json(content, display_id)['componentProps'])
'lang': 'en',
})['data']['contentRoute']['listedPathData']
return self._parse_component_props(content, display_id)
class KhanAcademyIE(KhanAcademyBaseIE):
@ -47,64 +56,98 @@ class KhanAcademyIE(KhanAcademyBaseIE):
_VALID_URL = KhanAcademyBaseIE._VALID_URL_TEMPL % ('4', 'v/')
_TEST = {
'url': 'https://www.khanacademy.org/computing/computer-science/cryptography/crypt/v/one-time-pad',
'md5': '9c84b7b06f9ebb80d22a5c8dedefb9a0',
'md5': '1d5c2e70fa6aa29c38eca419f12515ce',
'info_dict': {
'id': 'FlIG3TvQCBQ',
'ext': 'mp4',
'title': 'The one-time pad',
'description': 'The perfect cipher',
'display_id': '716378217',
'duration': 176,
'uploader': 'Brit Cruise',
'uploader_id': 'khanacademy',
'uploader': 'Khan Academy',
'uploader_id': '@khanacademy',
'uploader_url': 'https://www.youtube.com/@khanacademy',
'upload_date': '20120411',
'timestamp': 1334170113,
'license': 'cc-by-nc-sa',
'live_status': 'not_live',
'channel': 'Khan Academy',
'channel_id': 'UC4a-Gbdw7vOaccHmFo40b9g',
'channel_url': 'https://www.youtube.com/channel/UC4a-Gbdw7vOaccHmFo40b9g',
'channel_is_verified': True,
'playable_in_embed': True,
'categories': ['Education'],
'creators': ['Brit Cruise'],
'tags': [],
'age_limit': 0,
'availability': 'public',
'comment_count': int,
'channel_follower_count': int,
'thumbnail': str,
'view_count': int,
'like_count': int,
'heatmap': list,
},
'add_ie': ['Youtube'],
}
def _parse_component_props(self, component_props):
video = component_props['tutorialPageData']['contentModel']
info = self._parse_video(video)
author_names = video.get('authorNames')
info.update({
'uploader': ', '.join(author_names) if author_names else None,
'timestamp': parse_iso8601(video.get('dateAdded')),
'license': video.get('kaUserLicense'),
})
return info
def _parse_component_props(self, component_props, display_id):
video = component_props['content']
return {
**self._parse_video(video),
**traverse_obj(video, {
'creators': ('authorNames', ..., {str}),
'timestamp': ('dateAdded', {parse_iso8601}),
'license': ('kaUserLicense', {str}),
}),
}
class KhanAcademyUnitIE(KhanAcademyBaseIE):
IE_NAME = 'khanacademy:unit'
_VALID_URL = (KhanAcademyBaseIE._VALID_URL_TEMPL % ('2', '')) + '/?(?:[?#&]|$)'
_TEST = {
_VALID_URL = (KhanAcademyBaseIE._VALID_URL_TEMPL % ('1,2', '')) + '/?(?:[?#&]|$)'
_TESTS = [{
'url': 'https://www.khanacademy.org/computing/computer-science/cryptography',
'info_dict': {
'id': 'cryptography',
'id': 'x48c910b6',
'title': 'Cryptography',
'description': 'How have humans protected their secret messages through history? What has changed today?',
'display_id': 'computing/computer-science/cryptography',
'_old_archive_ids': ['khanacademyunit cryptography'],
},
'playlist_mincount': 31,
}
}, {
'url': 'https://www.khanacademy.org/computing/computer-science',
'info_dict': {
'id': 'x301707a0',
'title': 'Computer science theory',
'description': 'md5:4b472a4646e6cf6ec4ccb52c4062f8ba',
'display_id': 'computing/computer-science',
'_old_archive_ids': ['khanacademyunit computer-science'],
},
'playlist_mincount': 50,
}]
def _parse_component_props(self, component_props):
curation = component_props['curation']
def _parse_component_props(self, component_props, display_id):
course = component_props['course']
selected_unit = traverse_obj(course, (
'unitChildren', lambda _, v: v['relativeUrl'] == f'/{display_id}', any)) or course
entries = []
tutorials = try_get(curation, lambda x: x['tabs'][0]['modules'][0]['tutorials'], list) or []
for tutorial_number, tutorial in enumerate(tutorials, 1):
chapter_info = {
'chapter': tutorial.get('title'),
'chapter_number': tutorial_number,
'chapter_id': tutorial.get('id'),
}
for content_item in (tutorial.get('contentItems') or []):
if content_item.get('kind') == 'Video':
info = self._parse_video(content_item)
info.update(chapter_info)
entries.append(info)
def build_entry(entry):
return self.url_result(urljoin(
'https://www.khanacademy.org', entry['canonicalUrl']),
KhanAcademyIE, title=entry.get('translatedTitle'))
entries = traverse_obj(selected_unit, (
(('unitChildren', ...), None), 'allOrderedChildren', ..., 'curatedChildren',
lambda _, v: v['contentKind'] == 'Video' and v['canonicalUrl'], {build_entry}))
return self.playlist_result(
entries, curation.get('unit'), curation.get('title'),
curation.get('description'))
entries,
display_id=display_id,
**traverse_obj(selected_unit, {
'id': ('id', {str}),
'title': ('translatedTitle', {str}),
'description': ('translatedDescription', {str}),
'_old_archive_ids': ('slug', {str}, {lambda x: [make_archive_id(self, x)] if x else None}),
}))

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