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Add base class SearchInfoExtractor for search queries IEs

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This commit is contained in:
Jaime Marquínez Ferrándiz 2013-05-11 23:04:56 +02:00
parent 929f85d851
commit e30e9318da
1 changed files with 48 additions and 76 deletions
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124
youtube_dl/InfoExtractors.py
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@ -188,6 +188,45 @@ class InfoExtractor(object):
video_info['title'] = playlist_title
return video_info
class SearchInfoExtractor(InfoExtractor):
"""
Base class for search queries extractors
They accept urls in the format _SEARCH_KEY(|all|[0-9]):{query}
"""
_max_results = 0 # The maximum number of results the extractor can get
@classmethod
def _VALID_URL(cls):
return r'%s(?P<prefix>|\d+|all):(?P<query>[\s\S]+)' % cls._SEARCH_KEY
@classmethod
def suitable(cls, url):
return re.match(cls._VALID_URL() , url) is not None
def _real_extract(self, query):
mobj = re.match(self._VALID_URL(), query)
if mobj is None:
raise ExtractorError(u'Invalid search query "%s"' % query)
prefix = mobj.group('prefix')
query = mobj.group('query')
if prefix == '':
return self._get_n_results(query, 1)
elif prefix == 'all':
return self._get_n_results(query, self._max_results)
else:
n = int(prefix)
if n <= 0:
raise ExtractorError(u'invalid download number %s for query "%s"' % (n, query))
elif n > self._max_results:
self._downloader.report_warning(u'%s returns max %i results (you requested %i)' % (self._SEARCH_KEY, self._max_results, n))
n = self._max_results
return self._get_n_results(query, n)
def _get_n_results(self, query, n):
"""Get a specified number of results for a query"""
raise NotImplementedError("This method must be implemented by sublclasses")
class YoutubeIE(InfoExtractor):
"""Information extractor for youtube.com."""
@ -1336,42 +1375,18 @@ class GenericIE(InfoExtractor):
}]
class YoutubeSearchIE(InfoExtractor):
class YoutubeSearchIE(SearchInfoExtractor):
"""Information Extractor for YouTube search queries."""
_VALID_URL = r'ytsearch(\d+|all)?:[\s\S]+'
_API_URL = 'https://gdata.youtube.com/feeds/api/videos?q=%s&start-index=%i&max-results=50&v=2&alt=jsonc'
_max_youtube_results = 1000
_max_results = 1000
IE_NAME = u'youtube:search'
_SEARCH_KEY = 'ytsearch'
def report_download_page(self, query, pagenum):
"""Report attempt to download search page with given number."""
query = query.decode(preferredencoding())
self._downloader.to_screen(u'[youtube] query "%s": Downloading page %s' % (query, pagenum))
def _real_extract(self, query):
mobj = re.match(self._VALID_URL, query)
if mobj is None:
raise ExtractorError(u'Invalid search query "%s"' % query)
prefix, query = query.split(':')
prefix = prefix[8:]
query = query.encode('utf-8')
if prefix == '':
return self._get_n_results(query, 1)
elif prefix == 'all':
self._get_n_results(query, self._max_youtube_results)
else:
try:
n = int(prefix)
if n <= 0:
raise ExtractorError(u'Invalid download number %s for query "%s"' % (n, query))
elif n > self._max_youtube_results:
self._downloader.report_warning(u'ytsearch returns max %i results (you requested %i)' % (self._max_youtube_results, n))
n = self._max_youtube_results
return self._get_n_results(query, n)
except ValueError: # parsing prefix as integer fails
return self._get_n_results(query, 1)
def _get_n_results(self, query, n):
"""Get a specified number of results for a query"""
@ -1404,30 +1419,12 @@ class YoutubeSearchIE(InfoExtractor):
return self.playlist_result(videos, query)
class GoogleSearchIE(InfoExtractor):
class GoogleSearchIE(SearchInfoExtractor):
"""Information Extractor for Google Video search queries."""
_VALID_URL = r'gvsearch(?P<prefix>|\d+|all):(?P<query>[\s\S]+)'
_MORE_PAGES_INDICATOR = r'id="pnnext" class="pn"'
_max_google_results = 1000
_max_results = 1000
IE_NAME = u'video.google:search'
def _real_extract(self, query):
mobj = re.match(self._VALID_URL, query)
prefix = mobj.group('prefix')
query = mobj.group('query')
if prefix == '':
return self._get_n_results(query, 1)
elif prefix == 'all':
return self._get_n_results(query, self._max_google_results)
else:
n = int(prefix)
if n <= 0:
raise ExtractorError(u'invalid download number %s for query "%s"' % (n, query))
elif n > self._max_google_results:
self._downloader.report_warning(u'gvsearch returns max %i results (you requested %i)' % (self._max_google_results, n))
n = self._max_google_results
return self._get_n_results(query, n)
_SEARCH_KEY = 'gvsearch'
def _get_n_results(self, query, n):
"""Get a specified number of results for a query"""
@ -1453,37 +1450,12 @@ class GoogleSearchIE(InfoExtractor):
if (pagenum * 10 > n) or not re.search(self._MORE_PAGES_INDICATOR, webpage):
return res
class YahooSearchIE(InfoExtractor):
class YahooSearchIE(SearchInfoExtractor):
"""Information Extractor for Yahoo! Video search queries."""
_VALID_URL = r'yvsearch(\d+|all)?:[\s\S]+'
_max_yahoo_results = 1000
_max_results = 1000
IE_NAME = u'screen.yahoo:search'
def _real_extract(self, query):
mobj = re.match(self._VALID_URL, query)
if mobj is None:
raise ExtractorError(u'Invalid search query "%s"' % query)
prefix, query = query.split(':')
prefix = prefix[8:]
query = query.encode('utf-8')
if prefix == '':
return self._get_n_results(query, 1)
elif prefix == 'all':
return self._get_n_results(query, self._max_yahoo_results)
else:
try:
n = int(prefix)
if n <= 0:
raise ExtractorError(u'Invalid download number %s for query "%s"' % (n, query))
elif n > self._max_yahoo_results:
self._downloader.report_warning(u'yvsearch returns max %i results (you requested %i)' % (self._max_yahoo_results, n))
n = self._max_yahoo_results
return self._get_n_results(query, n)
except ValueError: # parsing prefix as integer fails
return self._get_n_results(query, 1)
_SEARCH_KEY = 'yvsearch'
def _get_n_results(self, query, n):
"""Get a specified number of results for a query"""