Include Danny Colligan's YouTube search InfoExtractor

This commit is contained in:
Ricardo Garcia 2009-02-02 19:59:48 +01:00
parent d1580ed990
commit 25af2bce3a
1 changed files with 86 additions and 0 deletions

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@ -721,6 +721,90 @@ class MetacafeIE(InfoExtractor):
'ext': video_extension.decode('utf-8'),
}]
class YoutubeSearchIE(InfoExtractor):
"""Information Extractor for YouTube search queries."""
_VALID_QUERY = r'ytsearch(\d+|all)?:[\s\S]+'
_TEMPLATE_URL = 'http://www.youtube.com/results?search_query=%s&page=%s&gl=US&hl=en'
_VIDEO_INDICATOR = r'href="/watch\?v=.+?"'
_MORE_PAGES_INDICATOR = r'>Next</a>'
_youtube_ie = None
def __init__(self, youtube_ie, downloader=None):
InfoExtractor.__init__(self, downloader)
self._youtube_ie = youtube_ie
@staticmethod
def suitable(url):
return (re.match(YoutubeSearchIE._VALID_QUERY, url) is not None)
def report_download_page(self, query, pagenum):
"""Report attempt to download playlist page with given number."""
self.to_stdout(u'[youtube] query "%s": Downloading page %s' % (query, pagenum))
def _real_initialize(self):
self._youtube_ie.initialize()
def _real_extract(self, query):
mobj = re.match(self._VALID_QUERY, query)
if mobj is None:
self.to_stderr(u'ERROR: invalid search query "%s"' % query)
return [None]
prefix, query = query.split(':')
prefix = prefix[8:]
if prefix == '':
return self._download_n_results(query, 1)
elif prefix == 'all':
return self._download_n_results(query, -1)
else:
try:
n = int(prefix)
if n <= 0:
self.to_stderr(u'ERROR: invalid download number %s for query "%s"' % (n, query))
return [None]
return self._download_n_results(query, n)
except ValueError: # parsing prefix as int fails
return self._download_n_results(query, 1)
def _download_n_results(self, query, n):
"""Downloads a specified number of results for a query"""
video_ids = []
already_seen = set()
pagenum = 1
while True:
self.report_download_page(query, pagenum)
result_url = self._TEMPLATE_URL % (urllib.quote(query.replace(' ', '+')), pagenum)
request = urllib2.Request(result_url, None, std_headers)
try:
page = urllib2.urlopen(request).read()
except (urllib2.URLError, httplib.HTTPException, socket.error), err:
self.to_stderr(u'ERROR: unable to download webpage: %s' % str(err))
return [None]
# Extract video identifiers
for mobj in re.finditer(self._VIDEO_INDICATOR, page):
video_id = page[mobj.span()[0]:mobj.span()[1]].split('=')[2][:-1]
if video_id not in already_seen:
video_ids.append(video_id)
already_seen.add(video_id)
if len(video_ids) == n:
# Specified n videos reached
information = []
for id in video_ids:
information.extend(self._youtube_ie.extract('http://www.youtube.com/watch?v=%s' % id))
return information
if self._MORE_PAGES_INDICATOR not in page:
information = []
for id in video_ids:
information.extend(self._youtube_ie.extract('http://www.youtube.com/watch?v=%s' % id))
return information
pagenum = pagenum + 1
class YoutubePlaylistIE(InfoExtractor):
"""Information Extractor for YouTube playlists."""
@ -925,6 +1009,7 @@ if __name__ == '__main__':
youtube_ie = YoutubeIE()
metacafe_ie = MetacafeIE(youtube_ie)
youtube_pl_ie = YoutubePlaylistIE(youtube_ie)
youtube_search_ie = YoutubeSearchIE(youtube_ie)
# File downloader
charset = locale.getdefaultlocale()[1]
@ -946,6 +1031,7 @@ if __name__ == '__main__':
'ignoreerrors': opts.ignoreerrors,
'ratelimit': opts.ratelimit,
})
fd.add_info_extractor(youtube_search_ie)
fd.add_info_extractor(youtube_pl_ie)
fd.add_info_extractor(metacafe_ie)
fd.add_info_extractor(youtube_ie)