68 lines
2.3 KiB
Python
68 lines
2.3 KiB
Python
"""
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SleekXMPP: The Sleek XMPP Library
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Copyright (C) 2010 Nathanael C. Fritz
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This file is part of SleekXMPP.
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See the file license.txt for copying permission.
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"""
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from . import base
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from xml.etree import cElementTree
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from xml.parsers.expat import ExpatError
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ignore_ns = False
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class MatchXMLMask(base.MatcherBase):
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def __init__(self, criteria):
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base.MatcherBase.__init__(self, criteria)
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if type(criteria) == type(''):
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self._criteria = cElementTree.fromstring(self._criteria)
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self.default_ns = 'jabber:client'
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def setDefaultNS(self, ns):
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self.default_ns = ns
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def match(self, xml):
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if hasattr(xml, 'xml'):
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xml = xml.xml
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return self.maskcmp(xml, self._criteria, True)
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def maskcmp(self, source, maskobj, use_ns=False, default_ns='__no_ns__'):
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"""maskcmp(xmlobj, maskobj):
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Compare etree xml object to etree xml object mask"""
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use_ns = not ignore_ns
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#TODO require namespaces
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if source == None: #if element not found (happens during recursive check below)
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return False
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if not hasattr(maskobj, 'attrib'): #if the mask is a string, make it an xml obj
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try:
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maskobj = cElementTree.fromstring(maskobj)
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except ExpatError:
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logging.log(logging.WARNING, "Expat error: %s\nIn parsing: %s" % ('', maskobj))
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if not use_ns and source.tag.split('}', 1)[-1] != maskobj.tag.split('}', 1)[-1]: # strip off ns and compare
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return False
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if use_ns and (source.tag != maskobj.tag and "{%s}%s" % (self.default_ns, maskobj.tag) != source.tag ):
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return False
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if maskobj.text and source.text != maskobj.text:
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return False
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for attr_name in maskobj.attrib: #compare attributes
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if source.attrib.get(attr_name, "__None__") != maskobj.attrib[attr_name]:
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return False
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#for subelement in maskobj.getiterator()[1:]: #recursively compare subelements
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for subelement in maskobj: #recursively compare subelements
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if use_ns:
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if not self.maskcmp(source.find(subelement.tag), subelement, use_ns):
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return False
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else:
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if not self.maskcmp(self.getChildIgnoreNS(source, subelement.tag), subelement, use_ns):
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return False
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return True
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def getChildIgnoreNS(self, xml, tag):
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tag = tag.split('}')[-1]
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try:
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idx = [c.tag.split('}')[-1] for c in xml.getchildren()].index(tag)
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except ValueError:
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return None
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return xml.getchildren()[idx]
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