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implement fallbacks and defaults in _search_regex

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This commit is contained in:
Filippo Valsorda 2013-06-06 14:35:08 +02:00
parent ac3e9394e7
commit 468e2e926b
2 changed files with 48 additions and 41 deletions
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86
youtube_dl/InfoExtractors.py
View file

@ -191,19 +191,37 @@ class InfoExtractor(object):
video_info['title'] = playlist_title
return video_info
def _search_regex(self, pattern, text, name, fatal=True, flags=0):
"""Extract a field from some text based on regex"""
mobj = re.search(pattern, text, flags)
if mobj is None and fatal:
raise ExtractorError(u'Unable to extract %s; '
u'please report this issue on GitHub.' % name)
elif mobj is None:
self._downloader.report_warning(u'unable to extract %s; '
u'please report this issue on GitHub.' % name)
return None
def _search_regex(self, pattern, string, name, default=None, fatal=True, flags=0):
"""
Perform a regex search on the given string, using a single or a list of
patterns returning the first matching group.
In case of failure return a default value or raise a WARNING or a
ExtractorError, depending on fatal, specifying the field name.
"""
if isinstance(pattern, (str, compat_str, compiled_regex_type)):
mobj = re.search(pattern, string, flags)
else:
# return the first matched group
for p in pattern:
mobj = re.search(p, string, flags)
if mobj: break
if sys.stderr.isatty() and os.name != 'nt':
_name = u'\033[0;34m%s\033[0m' % name
else:
_name = name
if mobj:
# return the first matching group
return next(g for g in mobj.groups() if g is not None)
elif default is not None:
return default
elif fatal:
raise ExtractorError(u'Unable to extract %s; '
u'please report this issue on GitHub.' % _name)
else:
self._downloader.report_warning(u'unable to extract %s; '
u'please report this issue on GitHub.' % _name)
return None
class SearchInfoExtractor(InfoExtractor):
"""
@ -2820,12 +2838,8 @@ class StanfordOpenClassroomIE(InfoExtractor):
note='Downloading course info page',
errnote='Unable to download course info page')
# TODO: implement default_value in search_regex
m = re.search('<h1>([^<]+)</h1>', coursepage)
if m:
info['title'] = unescapeHTML(m.group(1))
else:
info['title'] = info['id']
info['title'] = self._search_regex('<h1>([^<]+)</h1>', coursepage, 'title', default=info['id'])
info['title'] = unescapeHTML(info['title'])
info['description'] = self._search_regex('<description>([^<]+)</description>',
coursepage, u'description', fatal=False)
@ -3108,12 +3122,8 @@ class GooglePlusIE(InfoExtractor):
# Extract title
# Get the first line for title
# TODO: implement default_value in search_regex
video_title = u'NA'
pattern = r'<meta name\=\"Description\" content\=\"(.*?)[\n<"]'
mobj = re.search(pattern, webpage)
if mobj:
video_title = mobj.group(1)
video_title = self._search_regex(r'<meta name\=\"Description\" content\=\"(.*?)[\n<"]',
webpage, 'title', default=u'NA')
# Step 2, Stimulate clicking the image box to launch video
video_page = self._search_regex('"(https\://plus\.google\.com/photos/.*?)",,"image/jpeg","video"\]',
@ -3167,23 +3177,21 @@ class NBAIE(InfoExtractor):
video_url = u'http://ht-mobile.cdn.turner.com/nba/big' + video_id + '_nba_1280x720.mp4'
# TODO: implement default_value in search_regex
def _findProp(rexp, default=None):
m = re.search(rexp, webpage)
if m:
return unescapeHTML(m.group(1))
else:
return default
shortened_video_id = video_id.rpartition('/')[2]
title = _findProp(r'<meta property="og:title" content="(.*?)"', shortened_video_id).replace('NBA.com: ', '')
title = self._search_regex(r'<meta property="og:title" content="(.*?)"',
webpage, 'title', default=shortened_video_id).replace('NBA.com: ', '')
uploader_date = self._search_regex(r'<b>Date:</b> (.*?)</div>', webpage, 'upload_date', fatal=False)
description = self._search_regex(r'<div class="description">(.*?)</h1>', webpage, 'description', fatal=False)
info = {
'id': shortened_video_id,
'url': video_url,
'ext': 'mp4',
'title': title,
'uploader_date': _findProp(r'<b>Date:</b> (.*?)</div>'),
'description': _findProp(r'<div class="description">(.*?)</h1>'),
'uploader_date': uploader_date,
'description': description,
}
return [info]
@ -3335,13 +3343,9 @@ class FunnyOrDieIE(InfoExtractor):
webpage, u'video URL', flags=re.DOTALL)
video_url = unescapeHTML(video_url)
# TODO: implement fallbacks in regex_search
m = re.search(r"<h1 class='player_page_h1'.*?>(?P<title>.*?)</h1>", webpage, flags=re.DOTALL)
if not m:
m = re.search(r'<title>(?P<title>[^<]+?)</title>', webpage)
if not m:
raise ExtractorError(u'Cannot find video title')
title = clean_html(m.group('title'))
title = self._search_regex((r"<h1 class='player_page_h1'.*?>(?P<title>.*?)</h1>",
r'<title>(?P<title>[^<]+?)</title>'), webpage, 'title', flags=re.DOTALL)
title = clean_html(title)
video_description = self._search_regex(r'<meta property="og:description" content="(?P<desc>.*?)"',
webpage, u'description', flags=re.DOTALL)

3
youtube_dl/utils.py
View file

@ -154,6 +154,9 @@ def compat_ord(c):
if type(c) is int: return c
else: return ord(c)
# This is not clearly defined otherwise
compiled_regex_type = type(re.compile(''))
std_headers = {
'User-Agent': 'Mozilla/5.0 (X11; Linux x86_64; rv:10.0) Gecko/20100101 Firefox/10.0',
'Accept-Charset': 'ISO-8859-1,utf-8;q=0.7,*;q=0.7',