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from __future__ import unicode_literals
import re
from .common import InfoExtractor
from ..utils import (
unified_strdate,
)
class KhanAcademyIE(InfoExtractor):
_VALID_URL = r'^https?://(?:(?:www|api)\.)?khanacademy\.org/(?P<key>[^/]+)/(?:[^/]+/){,2}(?P<id>[^?#/]+)(?:$|[?#])'
IE_NAME = 'KhanAcademy'
_TESTS = [{
'url': 'http://www.khanacademy.org/video/one-time-pad',
'md5': '7b391cce85e758fb94f763ddc1bbb979',
'info_dict': {
'id': 'one-time-pad',
'ext': 'webm',
'title': 'The one-time pad',
'description': 'The perfect cipher',
'duration': 176,
'uploader': 'Brit Cruise',
'uploader_id': 'khanacademy',
'upload_date': '20120411',
},
'add_ie': ['Youtube'],
}, {
'url': 'https://www.khanacademy.org/math/applied-math/cryptography',
'info_dict': {
'id': 'cryptography',
'title': 'Journey into cryptography',
'description': 'How have humans protected their secret messages through history? What has changed today?',
},
'playlist_mincount': 3,
}]
def _real_extract(self, url):
m = re.match(self._VALID_URL, url)
video_id = m.group('id')
if m.group('key') == 'video':
data = self._download_json(
'http://api.khanacademy.org/api/v1/videos/' + video_id,
video_id, 'Downloading video info')
upload_date = unified_strdate(data['date_added'])
uploader = ', '.join(data['author_names'])
return {
'_type': 'url_transparent',
'url': data['url'],
'id': video_id,
'title': data['title'],
'thumbnail': data['image_url'],
'duration': data['duration'],
'description': data['description'],
'uploader': uploader,
'upload_date': upload_date,
}
else:
# topic
data = self._download_json(
'http://api.khanacademy.org/api/v1/topic/' + video_id,
video_id, 'Downloading topic info')
entries = [
{
'_type': 'url',
'url': c['url'],
'id': c['id'],
'title': c['title'],
}
for c in data['children'] if c['kind'] in ('Video', 'Topic')]
return {
'_type': 'playlist',
'id': video_id,
'title': data['title'],
'description': data['description'],
'entries': entries,
}
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