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[youtubedl] / youtube_dl / extractor / 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