Make OFS independent of webdav resource classes.

src/OFS/Application.py

@@ -29,7 +29,6 @@ from DateTime import DateTime
 from OFS.metaconfigure import get_packages_to_initialize
 from OFS.metaconfigure import package_initialized
 from OFS.userfolder import UserFolder
-from webdav.NullResource import NullResource
 from zExceptions import Redirect as RedirectException, Forbidden
 
 from zope.interface import implements
@@ -40,6 +39,11 @@ from FindSupport import FindSupport
 from interfaces import IApplication
 from misc_ import Misc_
 
+try:
+    from webdav.NullResource import NullResource
+except ImportError:
+    NullResource = None
+
 LOG = getLogger('Application')
 
 APP_MANAGER = None
@@ -124,7 +128,7 @@ class Application(ApplicationDefaultPermissions,
             pass
 
         method = REQUEST.get('REQUEST_METHOD', 'GET')
-        if not method in ('GET', 'POST'):
+        if NullResource is not None and method not in ('GET', 'POST'):
             return NullResource(self, name, REQUEST).__of__(self)
 
         # Waaa. unrestrictedTraverse calls us with a fake REQUEST.

src/OFS/Folder.py

@@ -17,7 +17,6 @@ Folders are the basic container objects and are analogous to directories.
 
 from AccessControl.class_init import InitializeClass
 from App.special_dtml import DTMLFile
-from webdav.Collection import Collection
 from zope.interface import implements
 
 from OFS.FindSupport import FindSupport
@@ -27,6 +26,12 @@ from OFS.PropertyManager import PropertyManager
 from OFS.role import RoleManager
 from OFS.SimpleItem import Item
 
+try:
+    from webdav.Collection import Collection
+except ImportError:
+    class Collection(object):
+        pass
+
 
 manage_addFolderForm=DTMLFile('dtml/folderAdd', globals())
 

src/OFS/ObjectManager.py

@@ -46,8 +46,6 @@ from App.Management import Tabs
 from App.special_dtml import DTMLFile
 from DateTime import DateTime
 from Persistence import Persistent
-from webdav.Collection import Collection
-from webdav.NullResource import NullResource
 from zExceptions import BadRequest, ResourceLockedError
 from zope.container.contained import notifyContainerModified
 from zope.event import notify
@@ -66,6 +64,16 @@ from OFS.XMLExportImport import importXML
 from OFS.XMLExportImport import exportXML
 from OFS.XMLExportImport import magic
 
+try:
+    from webdav.Collection import Collection
+    from webdav.NullResource import NullResource
+except ImportError:
+    NullResource = None
+
+    class Collection(object):
+        pass
+
+
 # Constants: __replaceable__ flags:
 NOT_REPLACEABLE = 0
 REPLACEABLE = 1
@@ -769,8 +777,9 @@ class ObjectManager(CopyContainer,
             return self._getOb(key, None)
         request = getattr(self, 'REQUEST', None)
         if not isinstance(request, (str, NoneType)):
-            method=request.get('REQUEST_METHOD', 'GET')
-            if (request.maybe_webdav_client and
+            method = request.get('REQUEST_METHOD', 'GET')
+            if (NullResource is not None and
+                    request.maybe_webdav_client and
                     method not in ('GET', 'POST')):
                 return NullResource(self, key, request).__of__(self)
         raise KeyError(key)

src/OFS/PropertySheets.py

@@ -21,25 +21,35 @@ from AccessControl.Permissions import access_contents_information
 from AccessControl.Permissions import manage_properties
 from AccessControl.Permissions import view_management_screens
 from AccessControl.SecurityInfo import ClassSecurityInfo
-from AccessControl.SecurityManagement import getSecurityManager
 from Acquisition import aq_base
 from Acquisition import aq_parent
 from Acquisition import Implicit
-from App.Common import iso8601_date
-from App.Common import rfc1123_date
 from App.Dialogs import MessageDialog
 from App.Management import Tabs
 from App.special_dtml import DTMLFile
 from ExtensionClass import Base
 from Persistence import Persistent
 from Traversable import Traversable
-from webdav.common import isDavCollection
-from webdav.common import urlbase
-from webdav.interfaces import IWriteLock
 from zExceptions import BadRequest
 from zExceptions import Redirect
 from ZPublisher.Converters import type_converters
 
+try:
+    from webdav.PropertySheet import DAVPropertySheetMixin
+except ImportError:
+    class DAVPropertySheetMixin(object):
+        pass
+
+
+class Virtual:
+    """A virtual propertysheet stores it's properties in it's instance."""
+
+    def __init__(self):
+        pass
+
+    def v_self(self):
+        return aq_parent(aq_parent(self))
+
 
 class View(Tabs, Base):
     """A view of an object, typically used for management purposes
@@ -101,7 +111,7 @@ class View(Tabs, Base):
             return ''
 
 
-class PropertySheet(Traversable, Persistent, Implicit):
+class PropertySheet(Traversable, Persistent, Implicit, DAVPropertySheetMixin):
     """A PropertySheet is a container for a set of related properties and
        metadata describing those properties. PropertySheets may or may not
        provide a web interface for managing its properties."""
@@ -309,110 +319,6 @@ class PropertySheet(Traversable, Persistent, Implicit):
             dict[p['id']] = p
         return dict
 
-    propstat='<d:propstat xmlns:n="%s">\n' \
-             '  <d:prop>\n' \
-             '%s\n' \
-             '  </d:prop>\n' \
-             '  <d:status>HTTP/1.1 %s</d:status>\n%s' \
-             '</d:propstat>\n'
-
-    propdesc='  <d:responsedescription>\n' \
-             '  %s\n' \
-             '  </d:responsedescription>\n'
-
-    def dav__allprop(self, propstat=propstat ):
-        # DAV helper method - return one or more propstat elements
-        # indicating property names and values for all properties.
-        result=[]
-        for item in self._propertyMap():
-            name, type=item['id'], item.get('type','string')
-            value=self.getProperty(name)
-
-            if type=='tokens':
-                value=' '.join(map(str, value))
-            elif type=='lines':
-                value='\n'.join(map(str, value))
-            # check for xml property
-            attrs=item.get('meta', {}).get('__xml_attrs__', None)
-            if attrs is not None:
-                # It's a xml property. Don't escape value.
-                attrs=''.join(' %s="%s"' % n for n in attrs.items())
-            else:
-                # It's a non-xml property. Escape value.
-                attrs=''
-                if not hasattr(self,"dav__"+name):
-                    value = xml_escape(value)
-            prop='  <n:%s%s>%s</n:%s>' % (name, attrs, value, name)
-
-            result.append(prop)
-        if not result: return ''
-        result='\n'.join(result)
-
-        return propstat % (self.xml_namespace(), result, '200 OK', '')
-
-    def dav__propnames(self, propstat=propstat):
-        # DAV helper method - return a propstat element indicating
-        # property names for all properties in this PropertySheet.
-        result=[]
-        for name in self.propertyIds():
-            result.append('  <n:%s/>' % name)
-        if not result: return ''
-        result='\n'.join(result)
-        return propstat % (self.xml_namespace(), result, '200 OK', '')
-
-
-    def dav__propstat(self, name, result,
-                      propstat=propstat, propdesc=propdesc):
-        # DAV helper method - return a propstat element indicating
-        # property name and value for the requested property.
-        xml_id=self.xml_namespace()
-        propdict=self._propdict()
-        if name not in propdict:
-            if xml_id:
-                prop='<n:%s xmlns:n="%s"/>\n' % (name, xml_id)
-            else:
-                prop='<%s xmlns=""/>\n' % name
-            code='404 Not Found'
-            if not result.has_key(code):
-                result[code]=[prop]
-            else: result[code].append(prop)
-            return
-        else:
-            item=propdict[name]
-            name, type=item['id'], item.get('type','string')
-            value=self.getProperty(name)
-            if type=='tokens':
-                value=' '.join(map(str, value))
-            elif type=='lines':
-                value='\n'.join(map(str, value))
-            # allow for xml properties
-            attrs=item.get('meta', {}).get('__xml_attrs__', None)
-            if attrs is not None:
-                # It's a xml property. Don't escape value.
-                attrs=''.join(' %s="%s"' % n for n in attrs.items())
-            else:
-                # It's a non-xml property. Escape value.
-                attrs=''
-                if not hasattr(self, 'dav__%s' % name):
-                    value = xml_escape(value)
-            if xml_id:
-                prop='<n:%s%s xmlns:n="%s">%s</n:%s>\n' % (
-                    name, attrs, xml_id, value, name)
-            else:
-                prop ='<%s%s xmlns="">%s</%s>\n' % (
-                    name, attrs, value, name)
-            code='200 OK'
-            if not result.has_key(code):
-                result[code]=[prop]
-            else: result[code].append(prop)
-            return
-
-    del propstat
-    del propdesc
-
-
-    # Web interface
-
     manage = DTMLFile('dtml/properties', globals())
 
     security.declareProtected(manage_properties, 'manage_propertiesForm')
@@ -490,16 +396,6 @@ class PropertySheet(Traversable, Persistent, Implicit):
 InitializeClass(PropertySheet)
 
 
-class Virtual:
-    """A virtual propertysheet stores it's properties in it's instance."""
-
-    def __init__(self):
-        pass
-
-    def v_self(self):
-        return aq_parent(aq_parent(self))
-
-
 class DefaultProperties(Virtual, PropertySheet, View):
     """The default property set mimics the behavior of old-style Zope
        properties -- it stores its property values in the instance of
@@ -511,115 +407,12 @@ class DefaultProperties(Virtual, PropertySheet, View):
 InitializeClass(DefaultProperties)
 
 
-class DAVProperties(Virtual, PropertySheet, View):
-    """WebDAV properties"""
-
-    id='webdav'
-    _md={'xmlns': 'DAV:'}
-    pm=({'id':'creationdate',     'mode':'r'},
-        {'id':'displayname',      'mode':'r'},
-        {'id':'resourcetype',     'mode':'r'},
-        {'id':'getcontenttype',   'mode':'r'},
-        {'id':'getcontentlength', 'mode':'r'},
-        {'id':'source',           'mode':'r'},
-        {'id':'supportedlock',    'mode':'r'},
-        {'id':'lockdiscovery',    'mode':'r'},
-        )
-
-    def getProperty(self, id, default=None):
-        method='dav__%s' % id
-        if not hasattr(self, method):
-            return default
-        return getattr(self, method)()
-
-    def _setProperty(self, id, value, type='string', meta=None):
-        raise ValueError, '%s cannot be set.' % escape(id)
-
-    def _updateProperty(self, id, value):
-        raise ValueError, '%s cannot be updated.' % escape(id)
-
-    def _delProperty(self, id):
-        raise ValueError, '%s cannot be deleted.' % escape(id)
-
-    def _propertyMap(self):
-        # Only use getlastmodified if returns a value
-        if hasattr(self.v_self(), '_p_mtime'):
-            return self.pm + ({'id':'getlastmodified',  'mode':'r'},)
-        return self.pm
-
-    def propertyMap(self):
-        return [dict.copy() for dict in self._propertyMap()]
-
-    def dav__creationdate(self):
-        return iso8601_date(43200.0)
-
-    def dav__displayname(self):
-        return absattr(xml_escape(self.v_self().title_or_id()))
-
-    def dav__resourcetype(self):
-        vself=self.v_self()
-        if isDavCollection(vself):
-            return '<n:collection/>'
-        return ''
-
-    def dav__getlastmodified(self):
-        return rfc1123_date(self.v_self()._p_mtime)
-
-    def dav__getcontenttype(self):
-        vself=self.v_self()
-        if hasattr(vself, 'content_type'):
-            return absattr(vself.content_type)
-        if hasattr(vself, 'default_content_type'):
-            return absattr(vself.default_content_type)
-        return ''
-
-    def dav__getcontentlength(self):
-        vself=self.v_self()
-        if hasattr(vself, 'get_size'):
-            return vself.get_size()
-        return ''
-
-    def dav__source(self):
-        vself=self.v_self()
-        if hasattr(vself, 'document_src'):
-            url=urlbase(vself.absolute_url())
-            return '\n  <n:link>\n' \
-                   '  <n:src>%s</n:src>\n' \
-                   '  <n:dst>%s/document_src</n:dst>\n' \
-                   '  </n:link>\n  ' % (url, url)
-        return ''
-
-    def dav__supportedlock(self):
-        vself = self.v_self()
-        out = '\n'
-        if IWriteLock.providedBy(vself):
-            out += ('  <n:lockentry>\n'
-                    '  <d:lockscope><d:exclusive/></d:lockscope>\n'
-                    '  <d:locktype><d:write/></d:locktype>\n'
-                    '  </n:lockentry>\n  ')
-        return out
-
-    def dav__lockdiscovery(self):
-        security = getSecurityManager()
-        user = security.getUser().getId()
-
-        vself = self.v_self()
-        out = '\n'
-        if IWriteLock.providedBy(vself):
-            locks = vself.wl_lockValues(killinvalids=1)
-            for lock in locks:
-
-                creator = lock.getCreator()[-1]
-                if creator == user: fake=0
-                else:               fake=1
-
-                out = '%s\n%s' % (out, lock.asLockDiscoveryProperty('n',fake=fake))
-
-            out = '%s\n' % out
-
-        return out
-
-InitializeClass(DAVProperties)
+# import cycles
+try:
+    from webdav.PropertySheets import DAVProperties
+except ImportError:
+    class DAVProperties(object):
+        pass
 
 
 class PropertySheets(Traversable, Implicit, Tabs):
@@ -793,17 +586,3 @@ class vps(Base):
 
     def __of__(self, parent):
         return self.c().__of__(parent)
-
-def absattr(attr):
-    if callable(attr):
-        return attr()
-    return attr
-
-def xml_escape(value):
-    from webdav.xmltools import escape
-    if not isinstance(value, basestring):
-        value = unicode(value)
-    if not isinstance(value, unicode):
-        value = value.decode('utf-8')
-    value = escape(value)
-    return value.encode('utf-8')

src/OFS/SimpleItem.py

@@ -47,7 +47,6 @@ from DocumentTemplate.html_quote import html_quote
 from DocumentTemplate.ustr import ustr
 from ExtensionClass import Base
 from Persistence import Persistent
-from webdav.Resource import Resource
 from zExceptions import Redirect
 from zExceptions.ExceptionFormatter import format_exception
 from zope.interface import implements
@@ -60,6 +59,12 @@ from OFS.CopySupport import CopySource
 from OFS.role import RoleManager
 from OFS.Traversable import Traversable
 
+try:
+    from webdav.Resource import Resource
+except ImportError:
+    class Resource(object):
+        pass
+
 logger = logging.getLogger()
 
 

src/OFS/Traversable.py

@@ -195,7 +195,11 @@ class Traversable:
             obj = self
 
         # import time ordering problem
+        try:
             from webdav.NullResource import NullResource
+        except ImportError:
+            NullResource = None
+
         resource = _marker
         try:
             while path:
@@ -277,10 +281,12 @@ class Traversable:
                             else:
                                 try:
                                     next = obj[name]
-                                    # The item lookup may return a NullResource,
-                                    # if this is the case we save it and return it
-                                    # if all other lookups fail.
-                                    if isinstance(next, NullResource):
+                                    # The item lookup may return a
+                                    # NullResource, if this is the case we
+                                    # save it and return it if all other
+                                    # lookups fail.
+                                    if (NullResource is not None and
+                                            isinstance(next, NullResource)):
                                         resource = next
                                         raise KeyError(name)
                                 except (AttributeError, TypeError):

src/OFS/interfaces.py

@@ -27,8 +27,16 @@ from Acquisition.interfaces import IAcquirer
 from App.interfaces import INavigation
 from App.interfaces import IUndoSupport
 from persistent.interfaces import IPersistent
-from webdav.interfaces import IDAVCollection
-from webdav.interfaces import IDAVResource
+
+try:
+    from webdav.interfaces import IDAVCollection
+    from webdav.interfaces import IDAVResource
+except ImportError:
+    class IDAVCollection(Interface):
+        pass
+
+    class IDAVResource(Interface):
+        pass
 
 
 class IOrderedContainer(Interface):

src/OFS/tests/testApplication.py

 import unittest
 
+try:
+    from webdav.NullResource import NullResource
+except ImportError:
+    NullResource = None
+
 
 class ApplicationTests(unittest.TestCase):
 
@@ -90,9 +95,9 @@ class ApplicationTests(unittest.TestCase):
         request = {'REQUEST_METHOD': 'GET'}
         self.assertRaises(KeyError, app.__bobo_traverse__, request, 'NONESUCH')
 
+    if NullResource is not None:
         def test___bobo_traverse__attribute_key_miss_R_M_not_GET_POST(self):
             from Acquisition import aq_inner, aq_parent
-        from webdav.NullResource import NullResource
 
             app = self._makeOne()
             app._getOb = _noWay
@@ -103,5 +108,6 @@ class ApplicationTests(unittest.TestCase):
             self.assertTrue(isinstance(result, NullResource))
             self.assertTrue(aq_parent(aq_inner(result)) is app)
 
+
 def _noWay(self, key, default=None):
     raise KeyError(key)

src/OFS/tests/testProperties.py

@@ -104,56 +104,5 @@ class TestPropertySheet(unittest.TestCase):
         self.assertTrue(isinstance(inst.prop, tuple))
 
         inst.manage_addProperty('prop2', ['xxx', 'yyy'], 'lines')
-        self.assertTrue(type(inst.getProperty('prop2')) == type(()))
-        self.assertTrue(type(inst.prop2) == type(()))
-
-    def test_dav__propstat_nullns(self):
-        # Tests 15 (propnullns) and 16 (propget) from the props suite
-        # of litmus version 10.5 (http://www.webdav.org/neon/litmus/)
-        # expose a bug in Zope propertysheet access via DAV.  If a
-        # proppatch command sets a property with a null xmlns,
-        # e.g. with a PROPPATCH body like:
-        #
-        # <?xml version="1.0" encoding="utf-8" ?>
-        # <propertyupdate xmlns="DAV:">
-        # <set>
-        # <prop>
-        # <nonamespace xmlns="">randomvalue</nonamespace>
-        # </prop>
-        # </set>
-        # </propertyupdate>
-        #
-        # When we set properties in the null namespace, Zope turns
-        # around and creates (or finds) a propertysheet with the
-        # xml_namespace of None and sets the value on it.  The
-        # response to a subsequent PROPFIND for the resource will fail
-        # because the XML generated by dav__propstat included a bogus
-        # namespace declaration (xmlns="None").
-        #
-        inst = self._makeOne('foo')
-
-        inst._md = {'xmlns':None}
-        resultd = {}
-        inst._setProperty('foo', 'bar')
-        inst.dav__propstat('foo', resultd)
-        self.assertEqual(len(resultd['200 OK']), 1)
-        self.assertEqual(resultd['200 OK'][0], '<foo xmlns="">bar</foo>\n')
-
-    def test_dav__propstat_notnullns(self):
-        # see test_dav__propstat_nullns
-        inst = self._makeOne('foo')
-
-        inst._md = {'xmlns':'http://www.example.com/props'}
-        resultd = {}
-        inst._setProperty('foo', 'bar')
-        inst.dav__propstat('foo', resultd)
-        self.assertEqual(len(resultd['200 OK']), 1)
-        self.assertEqual(resultd['200 OK'][0],
-                         '<n:foo xmlns:n="http://www.example.com/props">bar'
-                         '</n:foo>\n')
-
-def test_suite():
-    return unittest.TestSuite((
-        unittest.makeSuite(TestPropertyManager),
-        unittest.makeSuite(TestPropertySheet),
-        ))
+        self.assertTrue(isinstance(inst.getProperty('prop2'), tuple))
+        self.assertTrue(isinstance(inst.prop2, tuple))

src/ZPublisher/BaseRequest.py

@@ -435,6 +435,12 @@ class BaseRequest:
         # Set the posttraverse for duration of the traversal here
         self._post_traverse = post_traverse = []
 
+        # import time ordering problem
+        try:
+            from webdav.NullResource import NullResource
+        except ImportError:
+            NullResource = None
+
         entry_name = ''
         try:
             # We build parents in the wrong order, so we
@@ -459,11 +465,11 @@ class BaseRequest:
                     # This is webdav support. The last object in the path
                     # should not be acquired. Instead, a NullResource should
                     # be given if it doesn't exist:
-                    if (no_acquire_flag and
+                    if (NullResource is not None and no_acquire_flag and
                             hasattr(object, 'aq_base') and
-                        not hasattr(object,'__bobo_traverse__')):
+                            not hasattr(object, '__bobo_traverse__')):
+
                         if object.aq_parent is not object.aq_inner.aq_parent:
-                            from webdav.NullResource import NullResource
                             object = NullResource(parents[-2], object.getId(),
                                                   self).__of__(parents[-2])
 

src/webdav/PropertySheet.py

+##############################################################################
+#
+# Copyright (c) 2002 Zope Foundation and Contributors.
+#
+# This software is subject to the provisions of the Zope Public License,
+# Version 2.1 (ZPL).  A copy of the ZPL should accompany this distribution.
+# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
+# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
+# FOR A PARTICULAR PURPOSE.
+#
+##############################################################################
+
+import sys
+
+from webdav.xmltools import escape
+
+if sys.version_info >= (3, 0):
+    basestring = str
+    unicode = str
+
+
+def xml_escape(value):
+    if not isinstance(value, basestring):
+        value = unicode(value)
+    if not isinstance(value, unicode):
+        value = value.decode('utf-8')
+    value = escape(value)
+    return value.encode('utf-8')
+
+
+class DAVPropertySheetMixin(object):
+
+    propstat = ('<d:propstat xmlns:n="%s">\n'
+                '  <d:prop>\n'
+                '%s\n'
+                '  </d:prop>\n'
+                '  <d:status>HTTP/1.1 %s</d:status>\n%s'
+                '</d:propstat>\n')
+
+    propdesc = ('  <d:responsedescription>\n'
+                '  %s\n'
+                '  </d:responsedescription>\n')
+
+    def dav__allprop(self, propstat=propstat):
+        # DAV helper method - return one or more propstat elements
+        # indicating property names and values for all properties.
+        result = []
+        for item in self._propertyMap():
+            name, type = item['id'], item.get('type', 'string')
+            value = self.getProperty(name)
+
+            if type == 'tokens':
+                value = ' '.join(map(str, value))
+            elif type == 'lines':
+                value = '\n'.join(map(str, value))
+            # check for xml property
+            attrs = item.get('meta', {}).get('__xml_attrs__', None)
+            if attrs is not None:
+                # It's a xml property. Don't escape value.
+                attrs = ''.join(' %s="%s"' % n for n in attrs.items())
+            else:
+                # It's a non-xml property. Escape value.
+                attrs = ''
+                if not hasattr(self, "dav__" + name):
+                    value = xml_escape(value)
+            prop = '  <n:%s%s>%s</n:%s>' % (name, attrs, value, name)
+
+            result.append(prop)
+        if not result:
+            return ''
+        result = '\n'.join(result)
+
+        return propstat % (self.xml_namespace(), result, '200 OK', '')
+
+    def dav__propnames(self, propstat=propstat):
+        # DAV helper method - return a propstat element indicating
+        # property names for all properties in this PropertySheet.
+        result = []
+        for name in self.propertyIds():
+            result.append('  <n:%s/>' % name)
+        if not result:
+            return ''
+        result = '\n'.join(result)
+        return propstat % (self.xml_namespace(), result, '200 OK', '')
+
+    def dav__propstat(self, name, result,
+                      propstat=propstat, propdesc=propdesc):
+        # DAV helper method - return a propstat element indicating
+        # property name and value for the requested property.
+        xml_id = self.xml_namespace()
+        propdict = self._propdict()
+        if name not in propdict:
+            if xml_id:
+                prop = '<n:%s xmlns:n="%s"/>\n' % (name, xml_id)
+            else:
+                prop = '<%s xmlns=""/>\n' % name
+            code = '404 Not Found'
+            if code not in result:
+                result[code] = [prop]
+            else:
+                result[code].append(prop)
+            return
+        else:
+            item = propdict[name]
+            name, type = item['id'], item.get('type', 'string')
+            value = self.getProperty(name)
+            if type == 'tokens':
+                value = ' '.join(map(str, value))
+            elif type == 'lines':
+                value = '\n'.join(map(str, value))
+            # allow for xml properties
+            attrs = item.get('meta', {}).get('__xml_attrs__', None)
+            if attrs is not None:
+                # It's a xml property. Don't escape value.
+                attrs = ''.join(' %s="%s"' % n for n in attrs.items())
+            else:
+                # It's a non-xml property. Escape value.
+                attrs = ''
+                if not hasattr(self, 'dav__%s' % name):
+                    value = xml_escape(value)
+            if xml_id:
+                prop = '<n:%s%s xmlns:n="%s">%s</n:%s>\n' % (
+                    name, attrs, xml_id, value, name)
+            else:
+                prop = '<%s%s xmlns="">%s</%s>\n' % (
+                    name, attrs, value, name)
+            code = '200 OK'
+            if code not in result:
+                result[code] = [prop]
+            else:
+                result[code].append(prop)
+            return
+
+    del propstat
+    del propdesc

src/webdav/PropertySheets.py

+##############################################################################
+#
+# Copyright (c) 2002 Zope Foundation and Contributors.
+#
+# This software is subject to the provisions of the Zope Public License,
+# Version 2.1 (ZPL).  A copy of the ZPL should accompany this distribution.
+# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
+# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
+# FOR A PARTICULAR PURPOSE.
+#
+##############################################################################
+
+from cgi import escape
+import sys
+
+from AccessControl.class_init import InitializeClass
+from AccessControl.SecurityManagement import getSecurityManager
+from App.Common import iso8601_date
+from App.Common import rfc1123_date
+from OFS.PropertySheets import Virtual, PropertySheet, View
+
+from webdav.common import isDavCollection
+from webdav.common import urlbase
+from webdav.interfaces import IWriteLock
+
+if sys.version_info >= (3, 0):
+    basestring = str
+    unicode = str
+
+
+def absattr(attr):
+    if callable(attr):
+        return attr()
+    return attr
+
+
+def xml_escape(value):
+    from webdav.xmltools import escape
+    if not isinstance(value, basestring):
+        value = unicode(value)
+    if not isinstance(value, unicode):
+        value = value.decode('utf-8')
+    value = escape(value)
+    return value.encode('utf-8')
+
+
+class DAVProperties(Virtual, PropertySheet, View):
+    """WebDAV properties"""
+
+    id = 'webdav'
+    _md = {'xmlns': 'DAV:'}
+    pm = ({'id': 'creationdate', 'mode': 'r'},
+          {'id': 'displayname', 'mode': 'r'},
+          {'id': 'resourcetype', 'mode': 'r'},
+          {'id': 'getcontenttype', 'mode': 'r'},
+          {'id': 'getcontentlength', 'mode': 'r'},
+          {'id': 'source', 'mode': 'r'},
+          {'id': 'supportedlock', 'mode': 'r'},
+          {'id': 'lockdiscovery', 'mode': 'r'},
+          )
+
+    def getProperty(self, id, default=None):
+        method = 'dav__%s' % id
+        if not hasattr(self, method):
+            return default
+        return getattr(self, method)()
+
+    def _setProperty(self, id, value, type='string', meta=None):
+        raise ValueError('%s cannot be set.' % escape(id))
+
+    def _updateProperty(self, id, value):
+        raise ValueError('%s cannot be updated.' % escape(id))
+
+    def _delProperty(self, id):
+        raise ValueError('%s cannot be deleted.' % escape(id))
+
+    def _propertyMap(self):
+        # Only use getlastmodified if returns a value
+        if hasattr(self.v_self(), '_p_mtime'):
+            return self.pm + ({'id': 'getlastmodified', 'mode': 'r'},)
+        return self.pm
+
+    def propertyMap(self):
+        return [dict.copy() for dict in self._propertyMap()]
+
+    def dav__creationdate(self):
+        return iso8601_date(43200.0)
+
+    def dav__displayname(self):
+        return absattr(xml_escape(self.v_self().title_or_id()))
+
+    def dav__resourcetype(self):
+        vself = self.v_self()
+        if isDavCollection(vself):
+            return '<n:collection/>'
+        return ''
+
+    def dav__getlastmodified(self):
+        return rfc1123_date(self.v_self()._p_mtime)
+
+    def dav__getcontenttype(self):
+        vself = self.v_self()
+        if hasattr(vself, 'content_type'):
+            return absattr(vself.content_type)
+        if hasattr(vself, 'default_content_type'):
+            return absattr(vself.default_content_type)
+        return ''
+
+    def dav__getcontentlength(self):
+        vself = self.v_self()
+        if hasattr(vself, 'get_size'):
+            return vself.get_size()
+        return ''
+
+    def dav__source(self):
+        vself = self.v_self()
+        if hasattr(vself, 'document_src'):
+            url = urlbase(vself.absolute_url())
+            return '\n  <n:link>\n' \
+                   '  <n:src>%s</n:src>\n' \
+                   '  <n:dst>%s/document_src</n:dst>\n' \
+                   '  </n:link>\n  ' % (url, url)
+        return ''
+
+    def dav__supportedlock(self):
+        vself = self.v_self()
+        out = '\n'
+        if IWriteLock.providedBy(vself):
+            out += ('  <n:lockentry>\n'
+                    '  <d:lockscope><d:exclusive/></d:lockscope>\n'
+                    '  <d:locktype><d:write/></d:locktype>\n'
+                    '  </n:lockentry>\n  ')
+        return out
+
+    def dav__lockdiscovery(self):
+        security = getSecurityManager()
+        user = security.getUser().getId()
+
+        vself = self.v_self()
+        out = '\n'
+        if IWriteLock.providedBy(vself):
+            locks = vself.wl_lockValues(killinvalids=1)
+            for lock in locks:
+
+                creator = lock.getCreator()[-1]
+                if creator == user:
+                    fake = 0
+                else:
+                    fake = 1
+
+                out = '%s\n%s' % (
+                    out, lock.asLockDiscoveryProperty('n', fake=fake))
+
+            out = '%s\n' % out
+
+        return out
+
+InitializeClass(DAVProperties)

src/webdav/tests/testProperties.py

+##############################################################################
+#
+# Copyright (c) 2002 Zope Foundation and Contributors.
+#
+# This software is subject to the provisions of the Zope Public License,
+# Version 2.1 (ZPL).  A copy of the ZPL should accompany this distribution.
+# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
+# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
+# FOR A PARTICULAR PURPOSE.
+#
+##############################################################################
+
+import unittest
+
+
+class TestPropertySheet(unittest.TestCase):
+
+    def _makeOne(self, *args, **kw):
+        from OFS.PropertySheets import PropertySheet
+        return PropertySheet(*args, **kw)
+
+    def test_dav__propstat_nullns(self):
+        # Tests 15 (propnullns) and 16 (propget) from the props suite
+        # of litmus version 10.5 (http://www.webdav.org/neon/litmus/)
+        # expose a bug in Zope propertysheet access via DAV.  If a
+        # proppatch command sets a property with a null xmlns,
+        # e.g. with a PROPPATCH body like:
+        #
+        # <?xml version="1.0" encoding="utf-8" ?>
+        # <propertyupdate xmlns="DAV:">
+        # <set>
+        # <prop>
+        # <nonamespace xmlns="">randomvalue</nonamespace>
+        # </prop>
+        # </set>
+        # </propertyupdate>
+        #
+        # When we set properties in the null namespace, Zope turns
+        # around and creates (or finds) a propertysheet with the
+        # xml_namespace of None and sets the value on it.  The
+        # response to a subsequent PROPFIND for the resource will fail
+        # because the XML generated by dav__propstat included a bogus
+        # namespace declaration (xmlns="None").
+        #
+        inst = self._makeOne('foo')
+
+        inst._md = {'xmlns': None}
+        resultd = {}
+        inst._setProperty('foo', 'bar')
+        inst.dav__propstat('foo', resultd)
+        self.assertEqual(len(resultd['200 OK']), 1)
+        self.assertEqual(resultd['200 OK'][0], '<foo xmlns="">bar</foo>\n')
+
+    def test_dav__propstat_notnullns(self):
+        # see test_dav__propstat_nullns
+        inst = self._makeOne('foo')
+
+        inst._md = {'xmlns': 'http://www.example.com/props'}
+        resultd = {}
+        inst._setProperty('foo', 'bar')
+        inst.dav__propstat('foo', resultd)
+        self.assertEqual(len(resultd['200 OK']), 1)
+        self.assertEqual(resultd['200 OK'][0],
+                         '<n:foo xmlns:n="http://www.example.com/props">bar'
+                         '</n:foo>\n')