mirror of
https://github.com/correl/SleekXMPP.git
synced 2024-12-18 03:00:18 +00:00
79 lines
2.5 KiB
Python
79 lines
2.5 KiB
Python
"""
|
|
SleekXMPP: The Sleek XMPP Library
|
|
Copyright (C) 2010 Nathanael C. Fritz
|
|
This file is part of SleekXMPP.
|
|
|
|
See the file LICENSE for copying permission.
|
|
"""
|
|
|
|
from sleekxmpp.xmlstream.stanzabase import ET
|
|
from sleekxmpp.xmlstream.matcher.base import MatcherBase
|
|
|
|
|
|
# Flag indicating if the builtin XPath matcher should be used, which
|
|
# uses namespaces, or a custom matcher that ignores namespaces.
|
|
# Changing this will affect ALL XPath matchers.
|
|
IGNORE_NS = False
|
|
|
|
|
|
class MatchXPath(MatcherBase):
|
|
|
|
"""
|
|
The XPath matcher selects stanzas whose XML contents matches a given
|
|
XPath expression.
|
|
|
|
Note that using this matcher may not produce expected behavior when using
|
|
attribute selectors. For Python 2.6 and 3.1, the ElementTree find method
|
|
does not support the use of attribute selectors. If you need to support
|
|
Python 2.6 or 3.1, it might be more useful to use a StanzaPath matcher.
|
|
|
|
If the value of IGNORE_NS is set to true, then XPath expressions will
|
|
be matched without using namespaces.
|
|
|
|
Methods:
|
|
match -- Overrides MatcherBase.match.
|
|
"""
|
|
|
|
def match(self, xml):
|
|
"""
|
|
Compare a stanza's XML contents to an XPath expression.
|
|
|
|
If the value of IGNORE_NS is set to true, then XPath expressions
|
|
will be matched without using namespaces.
|
|
|
|
Note that in Python 2.6 and 3.1 the ElementTree find method does
|
|
not support attribute selectors in the XPath expression.
|
|
|
|
Arguments:
|
|
xml -- The stanza object to compare against.
|
|
"""
|
|
if hasattr(xml, 'xml'):
|
|
xml = xml.xml
|
|
x = ET.Element('x')
|
|
x.append(xml)
|
|
|
|
if not IGNORE_NS:
|
|
# Use builtin, namespace respecting, XPath matcher.
|
|
if x.find(self._criteria) is not None:
|
|
return True
|
|
return False
|
|
else:
|
|
# Remove namespaces from the XPath expression.
|
|
criteria = []
|
|
for ns_block in self._criteria.split('{'):
|
|
criteria.extend(ns_block.split('}')[-1].split('/'))
|
|
|
|
# Walk the XPath expression.
|
|
xml = x
|
|
for tag in criteria:
|
|
if not tag:
|
|
# Skip empty tag name artifacts from the cleanup phase.
|
|
continue
|
|
|
|
children = [c.tag.split('}')[-1] for c in xml.getchildren()]
|
|
try:
|
|
index = children.index(tag)
|
|
except ValueError:
|
|
return False
|
|
xml = xml.getchildren()[index]
|
|
return True
|