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[youtube] Add an extractor for Youtube recommended videos (":ytrec" keyword) (closes #476)

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The new extractor and YoutubeSubscriptionsIE are subclasses of YoutubeFeedsInfoExtractor, which allows to fetch videos from http://www.youtube.com/feed_ajax
This commit is contained in:
Jaime Marquínez Ferrándiz 2013-07-20 19:33:40 +02:00
parent 0382435990
commit d7ae0639b4
2 changed files with 31 additions and 9 deletions
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1
youtube_dl/extractor/__init__.py
View file

@ -92,6 +92,7 @@
YoutubeChannelIE,
YoutubeShowIE,
YoutubeSubscriptionsIE,
YoutubeRecommendedIE,
)
from .zdf import ZDFIE

39
youtube_dl/extractor/youtube.py
View file

@ -898,12 +898,12 @@ def _real_extract(self, url):
return [self.url_result('https://www.youtube.com' + season.group(1), 'YoutubePlaylist') for season in m_seasons]
class YoutubeSubscriptionsIE(YoutubeIE):
"""It's a subclass of YoutubeIE because we need to login"""
IE_DESC = u'YouTube.com subscriptions feed, "ytsubs" keyword(requires authentication)'
_VALID_URL = r'https?://www\.youtube\.com/feed/subscriptions|:ytsubs(?:criptions)?'
IE_NAME = u'youtube:subscriptions'
_FEED_TEMPLATE = 'http://www.youtube.com/feed_ajax?action_load_system_feed=1&feed_name=subscriptions&paging=%s'
class YoutubeFeedsInfoExtractor(YoutubeIE):
"""
Base class for extractors that fetch info from
http://www.youtube.com/feed_ajax
Subclasses must define the _FEED_NAME and _PLAYLIST_TITLE properties.
"""
_PAGING_STEP = 30
# Overwrite YoutubeIE properties we don't want
@ -912,18 +912,27 @@ class YoutubeSubscriptionsIE(YoutubeIE):
def suitable(cls, url):
return re.match(cls._VALID_URL, url) is not None
@property
def _FEED_TEMPLATE(self):
return 'http://www.youtube.com/feed_ajax?action_load_system_feed=1&feed_name=%s&paging=%%s' % self._FEED_NAME
@property
def IE_NAME(self):
return u'youtube:%s' % self._FEED_NAME
def _real_initialize(self):
(username, password) = self._get_login_info()
if username is None:
raise ExtractorError(u'No login info available, needed for downloading the Youtube subscriptions.', expected=True)
super(YoutubeSubscriptionsIE, self)._real_initialize()
super(YoutubeFeedsInfoExtractor, self)._real_initialize()
def _real_extract(self, url):
feed_entries = []
# The step argument is available only in 2.7 or higher
for i in itertools.count(0):
paging = i*self._PAGING_STEP
info = self._download_webpage(self._FEED_TEMPLATE % paging, 'feed',
info = self._download_webpage(self._FEED_TEMPLATE % paging,
u'%s feed' % self._FEED_NAME,
u'Downloading page %s' % i)
info = json.loads(info)
feed_html = info['feed_html']
@ -932,4 +941,16 @@ def _real_extract(self, url):
feed_entries.extend(self.url_result(id, 'Youtube') for id in ids)
if info['paging'] is None:
break
return self.playlist_result(feed_entries, playlist_title='Youtube Subscriptions')
return self.playlist_result(feed_entries, playlist_title=self._PLAYLIST_TITLE)
class YoutubeSubscriptionsIE(YoutubeFeedsInfoExtractor):
IE_DESC = u'YouTube.com subscriptions feed, "ytsubs" keyword(requires authentication)'
_VALID_URL = r'https?://www\.youtube\.com/feed/subscriptions|:ytsubs(?:criptions)?'
_FEED_NAME = 'subscriptions'
_PLAYLIST_TITLE = u'Youtube Subscriptions'
class YoutubeRecommendedIE(YoutubeFeedsInfoExtractor):
IE_DESC = u'YouTube.com recommended videos, "ytrec" keyword (requires authentication)'
_VALID_URL = r'https?://www\.youtube\.com/feed/recommended|:ytrec(?:ommended)?'
_FEED_NAME = 'recommended'
_PLAYLIST_TITLE = u'Youtube Recommended videos'