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[youtubedl] / youtube_dl / extractor / ted.py
1 import json
2 import re
3
4 from .subtitles import SubtitlesInfoExtractor
5
6 from ..utils import (
7 RegexNotFoundError,
8 )
9
10 class TEDIE(SubtitlesInfoExtractor):
11 _VALID_URL=r'''http://www\.ted\.com/
12 (
13 ((?P<type_playlist>playlists)/(?P<playlist_id>\d+)) # We have a playlist
14 |
15 ((?P<type_talk>talks)) # We have a simple talk
16 )
17 (/lang/(.*?))? # The url may contain the language
18 /(?P<name>\w+) # Here goes the name and then ".html"
19 '''
20 _TEST = {
21 u'url': u'http://www.ted.com/talks/dan_dennett_on_our_consciousness.html',
22 u'file': u'102.mp4',
23 u'md5': u'2d76ee1576672e0bd8f187513267adf6',
24 u'info_dict': {
25 u"description": u"md5:c6fa72e6eedbd938c9caf6b2702f5922",
26 u"title": u"Dan Dennett: The illusion of consciousness"
27 }
28 }
29
30 @classmethod
31 def suitable(cls, url):
32 """Receives a URL and returns True if suitable for this IE."""
33 return re.match(cls._VALID_URL, url, re.VERBOSE) is not None
34
35 def _real_extract(self, url):
36 m=re.match(self._VALID_URL, url, re.VERBOSE)
37 if m.group('type_talk'):
38 return self._talk_info(url)
39 else :
40 playlist_id=m.group('playlist_id')
41 name=m.group('name')
42 self.to_screen(u'Getting info of playlist %s: "%s"' % (playlist_id,name))
43 return [self._playlist_videos_info(url,name,playlist_id)]
44
45
46 def _playlist_videos_info(self, url, name, playlist_id):
47 '''Returns the videos of the playlist'''
48
49 webpage = self._download_webpage(
50 url, playlist_id, u'Downloading playlist webpage')
51 matches = re.finditer(
52 r'<p\s+class="talk-title[^"]*"><a\s+href="(?P<talk_url>/talks/[^"]+\.html)">[^<]*</a></p>',
53 webpage)
54
55 playlist_title = self._html_search_regex(r'div class="headline">\s*?<h1>\s*?<span>(.*?)</span>',
56 webpage, 'playlist title')
57
58 playlist_entries = [
59 self.url_result(u'http://www.ted.com' + m.group('talk_url'), 'TED')
60 for m in matches
61 ]
62 return self.playlist_result(
63 playlist_entries, playlist_id=playlist_id, playlist_title=playlist_title)
64
65 def _talk_info(self, url, video_id=0):
66 """Return the video for the talk in the url"""
67 m = re.match(self._VALID_URL, url,re.VERBOSE)
68 video_name = m.group('name')
69 webpage = self._download_webpage(url, video_id, 'Downloading \"%s\" page' % video_name)
70 self.report_extraction(video_name)
71 # If the url includes the language we get the title translated
72 title = self._html_search_regex(r'<span .*?id="altHeadline".+?>(?P<title>.*)</span>',
73 webpage, 'title')
74 json_data = self._search_regex(r'<script.*?>var talkDetails = ({.*?})</script>',
75 webpage, 'json data')
76 info = json.loads(json_data)
77 desc = self._html_search_regex(r'<div class="talk-intro">.*?<p.*?>(.*?)</p>',
78 webpage, 'description', flags = re.DOTALL)
79
80 thumbnail = self._search_regex(r'</span>[\s.]*</div>[\s.]*<img src="(.*?)"',
81 webpage, 'thumbnail')
82 formats = [{
83 'ext': 'mp4',
84 'url': stream['file'],
85 'format': stream['id']
86 } for stream in info['htmlStreams']]
87
88 video_id = info['id']
89
90 # subtitles
91 video_subtitles = self.extract_subtitles(video_id, webpage)
92 if self._downloader.params.get('listsubtitles', False):
93 self._list_available_subtitles(video_id, webpage)
94 return
95
96 return {
97 'id': video_id,
98 'title': title,
99 'thumbnail': thumbnail,
100 'description': desc,
101 'subtitles': video_subtitles,
102 'formats': formats,
103 }
104
105 def _get_available_subtitles(self, video_id, webpage):
106 try:
107 options = self._search_regex(r'(?:<select name="subtitles_language_select" id="subtitles_language_select">)(.*?)(?:</select>)', webpage, 'subtitles_language_select', flags=re.DOTALL)
108 languages = re.findall(r'(?:<option value=")(\S+)"', options)
109 if languages:
110 sub_lang_list = {}
111 for l in languages:
112 url = 'http://www.ted.com/talks/subtitles/id/%s/lang/%s/format/srt' % (video_id, l)
113 sub_lang_list[l] = url
114 return sub_lang_list
115 except RegexNotFoundError:
116 self._downloader.report_warning(u'video doesn\'t have subtitles')
117 return {}