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[youtube-dl] / youtube_dl / extractor / videolecturesnet.py
1 from __future__ import unicode_literals
2
3 import re
4
5 from .common import InfoExtractor
6 from ..compat import (
7     compat_HTTPError,
8     compat_urlparse,
9 )
10 from ..utils import (
11     ExtractorError,
12     parse_duration,
13 )
14
15
16 class VideoLecturesNetIE(InfoExtractor):
17     _VALID_URL = r'http://(?:www\.)?videolectures\.net/(?P<id>[^/#?]+)/*(?:[#?].*)?$'
18     IE_NAME = 'videolectures.net'
19
20     _TESTS = [{
21         'url': 'http://videolectures.net/promogram_igor_mekjavic_eng/',
22         'info_dict': {
23             'id': 'promogram_igor_mekjavic_eng',
24             'ext': 'mp4',
25             'title': 'Automatics, robotics and biocybernetics',
26             'description': 'md5:815fc1deb6b3a2bff99de2d5325be482',
27             'upload_date': '20130627',
28             'duration': 565,
29             'thumbnail': 're:http://.*\.jpg',
30         },
31     }, {
32         # video with invalid direct format links (HTTP 403)
33         'url': 'http://videolectures.net/russir2010_filippova_nlp/',
34         'info_dict': {
35             'id': 'russir2010_filippova_nlp',
36             'ext': 'flv',
37             'title': 'NLP at Google',
38             'description': 'md5:fc7a6d9bf0302d7cc0e53f7ca23747b3',
39             'duration': 5352,
40             'thumbnail': 're:http://.*\.jpg',
41         },
42         'params': {
43             # rtmp download
44             'skip_download': True,
45         },
46     }, {
47         'url': 'http://videolectures.net/deeplearning2015_montreal/',
48         'info_dict': {
49             'id': 'deeplearning2015_montreal',
50             'title': 'Deep Learning Summer School, Montreal 2015',
51             'description': 'md5:90121a40cc6926df1bf04dcd8563ed3b',
52         },
53         'playlist_count': 30,
54     }]
55
56     def _real_extract(self, url):
57         video_id = self._match_id(url)
58
59         smil_url = 'http://videolectures.net/%s/video/1/smil.xml' % video_id
60
61         try:
62             smil = self._download_smil(smil_url, video_id)
63         except ExtractorError as e:
64             if isinstance(e.cause, compat_HTTPError) and e.cause.code == 404:
65                 # Probably a playlist
66                 webpage = self._download_webpage(url, video_id)
67                 entries = [
68                     self.url_result(compat_urlparse.urljoin(url, video_url), 'VideoLecturesNet')
69                     for _, video_url in re.findall(r'<a[^>]+href=(["\'])(.+?)\1[^>]+id=["\']lec=\d+', webpage)]
70                 playlist_title = self._html_search_meta('title', webpage, 'title', fatal=True)
71                 playlist_description = self._html_search_meta('description', webpage, 'description')
72                 return self.playlist_result(entries, video_id, playlist_title, playlist_description)
73
74         info = self._parse_smil(smil, smil_url, video_id)
75
76         info['id'] = video_id
77
78         switch = smil.find('.//switch')
79         if switch is not None:
80             info['duration'] = parse_duration(switch.attrib.get('dur'))
81
82         return info