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[youtube-dl] / brightcove.py
1 import re
2 import json
3 import xml.etree.ElementTree
4
5 from .common import InfoExtractor
6 from ..utils import (
7     compat_urllib_parse,
8     find_xpath_attr,
9     compat_urlparse,
10 )
11
12 class BrightcoveIE(InfoExtractor):
13     _VALID_URL = r'https?://.*brightcove\.com/(services|viewer).*\?(?P<query>.*)'
14     _FEDERATED_URL_TEMPLATE = 'http://c.brightcove.com/services/viewer/htmlFederated?%s'
15     _PLAYLIST_URL_TEMPLATE = 'http://c.brightcove.com/services/json/experience/runtime/?command=get_programming_for_experience&playerKey=%s'
16     
17     # There is a test for Brigtcove in GenericIE, that way we test both the download
18     # and the detection of videos, and we don't have to find an URL that is always valid
19
20     @classmethod
21     def _build_brighcove_url(cls, object_str):
22         """
23         Build a Brightcove url from a xml string containing
24         <object class="BrightcoveExperience">{params}</object>
25         """
26         object_doc = xml.etree.ElementTree.fromstring(object_str)
27         assert u'BrightcoveExperience' in object_doc.attrib['class']
28         params = {'flashID': object_doc.attrib['id'],
29                   'playerID': find_xpath_attr(object_doc, './param', 'name', 'playerID').attrib['value'],
30                   }
31         playerKey = find_xpath_attr(object_doc, './param', 'name', 'playerKey')
32         # Not all pages define this value
33         if playerKey is not None:
34             params['playerKey'] = playerKey.attrib['value']
35         videoPlayer = find_xpath_attr(object_doc, './param', 'name', '@videoPlayer')
36         if videoPlayer is not None:
37             params['@videoPlayer'] = videoPlayer.attrib['value']
38         data = compat_urllib_parse.urlencode(params)
39         return cls._FEDERATED_URL_TEMPLATE % data
40
41     def _real_extract(self, url):
42         mobj = re.match(self._VALID_URL, url)
43         query_str = mobj.group('query')
44         query = compat_urlparse.parse_qs(query_str)
45
46         videoPlayer = query.get('@videoPlayer')
47         if videoPlayer:
48             return self._get_video_info(videoPlayer[0], query_str)
49         else:
50             player_key = query['playerKey']
51             return self._get_playlist_info(player_key[0])
52
53     def _get_video_info(self, video_id, query):
54         request_url = self._FEDERATED_URL_TEMPLATE % query
55         webpage = self._download_webpage(request_url, video_id)
56
57         self.report_extraction(video_id)
58         info = self._search_regex(r'var experienceJSON = ({.*?});', webpage, 'json')
59         info = json.loads(info)['data']
60         video_info = info['programmedContent']['videoPlayer']['mediaDTO']
61
62         return self._extract_video_info(video_info)
63
64     def _get_playlist_info(self, player_key):
65         playlist_info = self._download_webpage(self._PLAYLIST_URL_TEMPLATE % player_key,
66                                                player_key, u'Downloading playlist information')
67
68         playlist_info = json.loads(playlist_info)['videoList']
69         videos = [self._extract_video_info(video_info) for video_info in playlist_info['mediaCollectionDTO']['videoDTOs']]
70
71         return self.playlist_result(videos, playlist_id=playlist_info['id'],
72                                     playlist_title=playlist_info['mediaCollectionDTO']['displayName'])
73
74     def _extract_video_info(self, video_info):
75         renditions = video_info['renditions']
76         renditions = sorted(renditions, key=lambda r: r['size'])
77         best_format = renditions[-1]
78
79         return {'id': video_info['id'],
80                 'title': video_info['displayName'],
81                 'url': best_format['defaultURL'], 
82                 'ext': 'mp4',
83                 'description': video_info.get('shortDescription'),
84                 'thumbnail': video_info.get('videoStillURL') or video_info.get('thumbnailURL'),
85                 'uploader': video_info.get('publisherName'),
86                 }