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Code Issues Releases Wiki Activity

[generic] Create new _search_regex_all method that returns all matches

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This commit is contained in:
jesus 2019-03-14 19:45:56 +01:00
parent 8813775c98
commit a01e16e5fd
1 changed files with 42 additions and 22 deletions
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64
youtube_dl/extractor/common.py
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@ -965,41 +965,27 @@ class InfoExtractor(object):
video_info['description'] = playlist_description
return video_info
def _search_regex(self, pattern, string, name, default=NO_DEFAULT, fatal=True, flags=0, group=None, return_all=False):
def _search_regex(self, pattern, string, name, default=NO_DEFAULT, fatal=True, flags=0, group=None):
"""
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
RegexNotFoundError, depending on fatal, specifying the field name.
"""
matches = []
if isinstance(pattern, (str, compat_str, compiled_regex_type)):
if return_all:
matches = list(re.finditer(pattern, string, flags))
else:
mobj = re.search(pattern, string, flags)
mobj = re.search(pattern, string, flags)
else:
for p in pattern:
if return_all:
new_matches = list(re.finditer(p, string, flags))
matches.extend(new_matches)
else:
mobj = re.search(p, string, flags)
if mobj:
break
mobj = re.search(p, string, flags)
if mobj:
break
if not self._downloader.params.get('no_color') and compat_os_name != 'nt' and sys.stderr.isatty():
_name = '\033[0;34m%s\033[0m' % name
else:
_name = name
if return_all and len(matches) > 0:
if group is None:
return list(map(lambda m: next(g for g in m.groups() if g is not None), matches))
else:
return list(map(lambda m: m.group(group), matches))
elif mobj:
if mobj:
if group is None:
# return the first matching group
return next(g for g in mobj.groups() if g is not None)
@ -1013,6 +999,40 @@ class InfoExtractor(object):
self._downloader.report_warning('unable to extract %s' % _name + bug_reports_message())
return None
def _search_regex_all(self, pattern, string, name, default=NO_DEFAULT, fatal=True, flags=0, group=None):
"""
Perform a regex search on the given string, using a single or a list of
patterns returning the first matching group. Returns all matches.
In case of failure return a default value or raise a WARNING or a
RegexNotFoundError, depending on fatal, specifying the field name.
"""
matches = []
if isinstance(pattern, (str, compat_str, compiled_regex_type)):
matches = list(re.finditer(pattern, string, flags))
else:
for p in pattern:
new_matches = list(re.finditer(p, string, flags))
matches.extend(new_matches)
if not self._downloader.params.get('no_color') and compat_os_name != 'nt' and sys.stderr.isatty():
_name = '\033[0;34m%s\033[0m' % name
else:
_name = name
if len(matches) > 0:
if group is None:
return list(map(lambda m: next(g for g in m.groups() if g is not None), matches))
else:
return list(map(lambda m: m.group(group), matches))
elif default is not NO_DEFAULT:
return default
elif fatal:
raise RegexNotFoundError('Unable to extract %s' % _name)
else:
self._downloader.report_warning('unable to extract %s' % _name + bug_reports_message())
return None
def _html_search_regex(self, pattern, string, name, default=NO_DEFAULT, fatal=True, flags=0, group=None):
"""
Like _search_regex, but strips HTML tags and unescapes entities.
@ -1188,10 +1208,10 @@ class InfoExtractor(object):
'twitter card player')
def _search_json_ld(self, html, video_id, expected_type=None, **kwargs):
json_lds = self._search_regex(
json_lds = self._search_regex_all(
JSON_LD_RE, html, 'JSON-LD', group='json_ld', return_all=True, **kwargs)
default = kwargs.get('default', NO_DEFAULT)
if not json_lds or len(json_lds) == 0:
if not json_lds:
return default if default is not NO_DEFAULT else {}
# JSON-LD may be malformed and thus `fatal` should be respected.
# At the same time `default` may be passed that assumes `fatal=False`