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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
18 @classmethod
19 def suitable(cls, url):
20 """Receives a URL and returns True if suitable for this IE."""
21 return re.match(cls._VALID_URL, url, re.VERBOSE) is not None
22
23 def _real_extract(self, url):
24 m=re.match(self._VALID_URL, url, re.VERBOSE)
25 if m.group('type_talk'):
26 return [self._talk_info(url)]
27 else :
28 playlist_id=m.group('playlist_id')
29 name=m.group('name')
30 self.to_screen(u'Getting info of playlist %s: "%s"' % (playlist_id,name))
31 return [self._playlist_videos_info(url,name,playlist_id)]
32
33 def _playlist_videos_info(self,url,name,playlist_id=0):
34 '''Returns the videos of the playlist'''
35 video_RE=r'''
36 <li\ id="talk_(\d+)"([.\s]*?)data-id="(?P<video_id>\d+)"
37 ([.\s]*?)data-playlist_item_id="(\d+)"
38 ([.\s]*?)data-mediaslug="(?P<mediaSlug>.+?)"
39 '''
40 video_name_RE=r'<p\ class="talk-title"><a href="(?P<talk_url>/talks/(.+).html)">(?P<fullname>.+?)</a></p>'
41 webpage=self._download_webpage(url, playlist_id, 'Downloading playlist webpage')
42 m_videos=re.finditer(video_RE,webpage,re.VERBOSE)
43 m_names=re.finditer(video_name_RE,webpage)
44
45 playlist_title = self._html_search_regex(r'div class="headline">\s*?<h1>\s*?<span>(.*?)</span>',
46 webpage, 'playlist title')
47
48 playlist_entries = []
49 for m_video, m_name in zip(m_videos,m_names):
50 talk_url='http://www.ted.com%s' % m_name.group('talk_url')
51 playlist_entries.append(self.url_result(talk_url, 'TED'))
52 return self.playlist_result(playlist_entries, playlist_id = playlist_id, playlist_title = playlist_title)
53
54 def _talk_info(self, url, video_id=0):
55 """Return the video for the talk in the url"""
56 m = re.match(self._VALID_URL, url,re.VERBOSE)
57 video_name = m.group('name')
58 webpage = self._download_webpage(url, video_id, 'Downloading \"%s\" page' % video_name)
59 self.report_extraction(video_name)
60 # If the url includes the language we get the title translated
61 title = self._html_search_regex(r'<span id="altHeadline" >(?P<title>.*)</span>',
62 webpage, 'title')
63 json_data = self._search_regex(r'<script.*?>var talkDetails = ({.*?})</script>',
64 webpage, 'json data')
65 info = json.loads(json_data)
66 desc = self._html_search_regex(r'<div class="talk-intro">.*?<p.*?>(.*?)</p>',
67 webpage, 'description', flags = re.DOTALL)
68
69 thumbnail = self._search_regex(r'</span>[\s.]*</div>[\s.]*<img src="(.*?)"',
70 webpage, 'thumbnail')
71 info = {
72 'id': info['id'],
73 'url': info['htmlStreams'][-1]['file'],
74 'ext': 'mp4',
75 'title': title,
76 'thumbnail': thumbnail,
77 'description': desc,
78 }
79 return info