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[youtube-dl] / youtube_dl / extractor / ted.py
1 from __future__ import unicode_literals
2
3 import json
4 import re
5
6 from .subtitles import SubtitlesInfoExtractor
7
8 from ..utils import (
9     RegexNotFoundError,
10 )
11
12
13 class TEDIE(SubtitlesInfoExtractor):
14     _VALID_URL=r'''http://www\.ted\.com/
15                    (
16                         ((?P<type_playlist>playlists)/(?P<playlist_id>\d+)) # We have a playlist
17                         |
18                         ((?P<type_talk>talks)) # We have a simple talk
19                    )
20                    (/lang/(.*?))? # The url may contain the language
21                    /(?P<name>\w+) # Here goes the name and then ".html"
22                    '''
23     _TEST = {
24         'url': 'http://www.ted.com/talks/dan_dennett_on_our_consciousness.html',
25         'file': '102.mp4',
26         'md5': '4ea1dada91e4174b53dac2bb8ace429d',
27         'info_dict': {
28             "description": "md5:c6fa72e6eedbd938c9caf6b2702f5922",
29             "title": "Dan Dennett: The illusion of consciousness"
30         }
31     }
32
33     @classmethod
34     def suitable(cls, url):
35         """Receives a URL and returns True if suitable for this IE."""
36         return re.match(cls._VALID_URL, url, re.VERBOSE) is not None
37
38     def _real_extract(self, url):
39         m=re.match(self._VALID_URL, url, re.VERBOSE)
40         if m.group('type_talk'):
41             return self._talk_info(url)
42         else :
43             playlist_id=m.group('playlist_id')
44             name=m.group('name')
45             self.to_screen(u'Getting info of playlist %s: "%s"' % (playlist_id,name))
46             return [self._playlist_videos_info(url,name,playlist_id)]
47
48
49     def _playlist_videos_info(self, url, name, playlist_id):
50         '''Returns the videos of the playlist'''
51
52         webpage = self._download_webpage(
53             url, playlist_id, 'Downloading playlist webpage')
54         matches = re.finditer(
55             r'<p\s+class="talk-title[^"]*"><a\s+href="(?P<talk_url>/talks/[^"]+\.html)">[^<]*</a></p>',
56             webpage)
57
58         playlist_title = self._html_search_regex(r'div class="headline">\s*?<h1>\s*?<span>(.*?)</span>',
59                                                  webpage, 'playlist title')
60
61         playlist_entries = [
62             self.url_result(u'http://www.ted.com' + m.group('talk_url'), 'TED')
63             for m in matches
64         ]
65         return self.playlist_result(
66             playlist_entries, playlist_id=playlist_id, playlist_title=playlist_title)
67
68     def _talk_info(self, url, video_id=0):
69         """Return the video for the talk in the url"""
70         m = re.match(self._VALID_URL, url,re.VERBOSE)
71         video_name = m.group('name')
72         webpage = self._download_webpage(url, video_id, 'Downloading \"%s\" page' % video_name)
73         self.report_extraction(video_name)
74         # If the url includes the language we get the title translated
75         title = self._html_search_regex(r'<span .*?id="altHeadline".+?>(?P<title>.*)</span>',
76                                         webpage, 'title')
77         json_data = self._search_regex(r'<script.*?>var talkDetails = ({.*?})</script>',
78                                     webpage, 'json data')
79         info = json.loads(json_data)
80         desc = self._html_search_regex(r'<div class="talk-intro">.*?<p.*?>(.*?)</p>',
81                                        webpage, 'description', flags = re.DOTALL)
82         
83         thumbnail = self._search_regex(r'</span>[\s.]*</div>[\s.]*<img src="(.*?)"',
84                                        webpage, 'thumbnail')
85         formats = [{
86             'ext': 'mp4',
87             'url': stream['file'],
88             'format': stream['id']
89         } for stream in info['htmlStreams']]
90
91         video_id = info['id']
92
93         # subtitles
94         video_subtitles = self.extract_subtitles(video_id, webpage)
95         if self._downloader.params.get('listsubtitles', False):
96             self._list_available_subtitles(video_id, webpage)
97             return
98
99         return {
100             'id': video_id,
101             'title': title,
102             'thumbnail': thumbnail,
103             'description': desc,
104             'subtitles': video_subtitles,
105             'formats': formats,
106         }
107
108     def _get_available_subtitles(self, video_id, webpage):
109         try:
110             options = self._search_regex(r'(?:<select name="subtitles_language_select" id="subtitles_language_select">)(.*?)(?:</select>)', webpage, 'subtitles_language_select', flags=re.DOTALL)
111             languages = re.findall(r'(?:<option value=")(\S+)"', options)
112             if languages:
113                 sub_lang_list = {}
114                 for l in languages:
115                     url = 'http://www.ted.com/talks/subtitles/id/%s/lang/%s/format/srt' % (video_id, l)
116                     sub_lang_list[l] = url
117                 return sub_lang_list
118         except RegexNotFoundError:
119             self._downloader.report_warning(u'video doesn\'t have subtitles')
120         return {}