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[youtubedl] / youtube_dl / extractor / khanacademy.py
1 from __future__ import unicode_literals
2
3 import re
4
5 from .common import InfoExtractor
6 from ..utils import (
7 unified_strdate,
8 )
9
10
11 class KhanAcademyIE(InfoExtractor):
12 _VALID_URL = r'^https?://(?:www\.)?khanacademy\.org/(?P<key>[^/]+)/(?:[^/]+/){,2}(?P<id>[^?#/]+)(?:$|[?#])'
13 IE_NAME = 'KhanAcademy'
14
15 _TEST = {
16 'url': 'http://www.khanacademy.org/video/one-time-pad',
17 'file': 'one-time-pad.mp4',
18 'md5': '7021db7f2d47d4fff89b13177cb1e8f4',
19 'info_dict': {
20 'title': 'The one-time pad',
21 'description': 'The perfect cipher',
22 'duration': 176,
23 'uploader': 'Brit Cruise',
24 'upload_date': '20120411',
25 }
26 }
27
28 def _real_extract(self, url):
29 m = re.match(self._VALID_URL, url)
30 video_id = m.group('id')
31
32 if m.group('key') == 'video':
33 data = self._download_json(
34 'http://api.khanacademy.org/api/v1/videos/' + video_id,
35 video_id, 'Downloading video info')
36
37 upload_date = unified_strdate(data['date_added'])
38 uploader = ', '.join(data['author_names'])
39 return {
40 '_type': 'url_transparent',
41 'url': data['url'],
42 'id': video_id,
43 'title': data['title'],
44 'thumbnail': data['image_url'],
45 'duration': data['duration'],
46 'description': data['description'],
47 'uploader': uploader,
48 'upload_date': upload_date,
49 }
50 else:
51 # topic
52 data = self._download_json(
53 'http://api.khanacademy.org/api/v1/topic/' + video_id,
54 video_id, 'Downloading topic info')
55
56 entries = [
57 {
58 '_type': 'url',
59 'url': c['url'],
60 'id': c['id'],
61 'title': c['title'],
62 }
63 for c in data['children'] if c['kind'] in ('Video', 'Topic')]
64
65 return {
66 '_type': 'playlist',
67 'id': video_id,
68 'title': data['title'],
69 'description': data['description'],
70 'entries': entries,
71 }