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Refactor IDParser to search for elements by any attribute not just ID

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This commit is contained in:
Nick Daniels 2012-12-19 14:21:14 +00:00 committed by Philipp Hagemeister
parent 314d506b96
commit 43e8fafd49
1 changed files with 12 additions and 7 deletions
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19
youtube_dl/utils.py
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@ -214,10 +214,11 @@ def htmlentity_transform(matchobj):
return (u'&%s;' % entity)
compat_html_parser.locatestarttagend = re.compile(r"""<[a-zA-Z][-.a-zA-Z0-9:_]*(?:\s+(?:(?<=['"\s])[^\s/>][^\s/=>]*(?:\s*=+\s*(?:'[^']*'|"[^"]*"|(?!['"])[^>\s]*))?\s*)*)?\s*""", re.VERBOSE) # backport bugfix
class IDParser(compat_html_parser.HTMLParser):
"""Modified HTMLParser that isolates a tag with the specified id"""
def __init__(self, id):
self.id = id
class AttrParser(compat_html_parser.HTMLParser):
"""Modified HTMLParser that isolates a tag with the specified attribute"""
def __init__(self, attribute, value):
self.attribute = attribute
self.value = value
self.result = None
self.started = False
self.depth = {}
@ -242,7 +243,7 @@ class IDParser(compat_html_parser.HTMLParser):
attrs = dict(attrs)
if self.started:
self.find_startpos(None)
if 'id' in attrs and attrs['id'] == self.id:
if self.attribute in attrs and attrs[self.attribute] == self.value:
self.result = [tag]
self.started = True
self.watch_startpos = True
@ -280,8 +281,12 @@ class IDParser(compat_html_parser.HTMLParser):
return '\n'.join(lines).strip()
def get_element_by_id(id, html):
"""Return the content of the tag with the specified id in the passed HTML document"""
parser = IDParser(id)
"""Return the content of the tag with the specified ID in the passed HTML document"""
return get_element_by_attribute("id", id, html)
def get_element_by_attribute(attribute, value, html):
"""Return the content of the tag with the specified attribute in the passed HTML document"""
parser = AttrParser(attribute, value)
try:
parser.loads(html)
except compat_html_parser.HTMLParseError: