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[youtube-dl] / ted.py
1 import json
2 import re
3
4 from .common import InfoExtractor
5
6
7 class TEDIE(InfoExtractor):
8     _VALID_URL=r'''http://www\.ted\.com/
9                    (
10                         ((?P<type_playlist>playlists)/(?P<playlist_id>\d+)) # We have a playlist
11                         |
12                         ((?P<type_talk>talks)) # We have a simple talk
13                    )
14                    (/lang/(.*?))? # The url may contain the language
15                    /(?P<name>\w+) # Here goes the name and then ".html"
16                    '''
17     _TEST = {
18         u'url': u'http://www.ted.com/talks/dan_dennett_on_our_consciousness.html',
19         u'file': u'102.mp4',
20         u'md5': u'2d76ee1576672e0bd8f187513267adf6',
21         u'info_dict': {
22             u"description": u"md5:c6fa72e6eedbd938c9caf6b2702f5922", 
23             u"title": u"Dan Dennett: The illusion of consciousness"
24         }
25     }
26
27     @classmethod
28     def suitable(cls, url):
29         """Receives a URL and returns True if suitable for this IE."""
30         return re.match(cls._VALID_URL, url, re.VERBOSE) is not None
31
32     def _real_extract(self, url):
33         m=re.match(self._VALID_URL, url, re.VERBOSE)
34         if m.group('type_talk'):
35             return [self._talk_info(url)]
36         else :
37             playlist_id=m.group('playlist_id')
38             name=m.group('name')
39             self.to_screen(u'Getting info of playlist %s: "%s"' % (playlist_id,name))
40             return [self._playlist_videos_info(url,name,playlist_id)]
41
42     def _playlist_videos_info(self,url,name,playlist_id=0):
43         '''Returns the videos of the playlist'''
44         video_RE=r'''
45                      <li\ id="talk_(\d+)"([.\s]*?)data-id="(?P<video_id>\d+)"
46                      ([.\s]*?)data-playlist_item_id="(\d+)"
47                      ([.\s]*?)data-mediaslug="(?P<mediaSlug>.+?)"
48                      '''
49         video_name_RE=r'<p\ class="talk-title"><a href="(?P<talk_url>/talks/(.+).html)">(?P<fullname>.+?)</a></p>'
50         webpage=self._download_webpage(url, playlist_id, 'Downloading playlist webpage')
51         m_videos=re.finditer(video_RE,webpage,re.VERBOSE)
52         m_names=re.finditer(video_name_RE,webpage)
53
54         playlist_title = self._html_search_regex(r'div class="headline">\s*?<h1>\s*?<span>(.*?)</span>',
55                                                  webpage, 'playlist title')
56
57         playlist_entries = []
58         for m_video, m_name in zip(m_videos,m_names):
59             talk_url='http://www.ted.com%s' % m_name.group('talk_url')
60             playlist_entries.append(self.url_result(talk_url, 'TED'))
61         return self.playlist_result(playlist_entries, playlist_id = playlist_id, playlist_title = playlist_title)
62
63     def _talk_info(self, url, video_id=0):
64         """Return the video for the talk in the url"""
65         m = re.match(self._VALID_URL, url,re.VERBOSE)
66         video_name = m.group('name')
67         webpage = self._download_webpage(url, video_id, 'Downloading \"%s\" page' % video_name)
68         self.report_extraction(video_name)
69         # If the url includes the language we get the title translated
70         title = self._html_search_regex(r'<span .*?id="altHeadline".+?>(?P<title>.*)</span>',
71                                         webpage, 'title')
72         json_data = self._search_regex(r'<script.*?>var talkDetails = ({.*?})</script>',
73                                     webpage, 'json data')
74         info = json.loads(json_data)
75         desc = self._html_search_regex(r'<div class="talk-intro">.*?<p.*?>(.*?)</p>',
76                                        webpage, 'description', flags = re.DOTALL)
77         
78         thumbnail = self._search_regex(r'</span>[\s.]*</div>[\s.]*<img src="(.*?)"',
79                                        webpage, 'thumbnail')
80         info = {
81                 'id': info['id'],
82                 'url': info['htmlStreams'][-1]['file'],
83                 'ext': 'mp4',
84                 'title': title,
85                 'thumbnail': thumbnail,
86                 'description': desc,
87                 }
88         return info