- LP #143946: Provide a more informative error message when a

  WebDAV PUT fails.

doc/CHANGES.rst

@@ -181,6 +181,9 @@ Features Added
 Bugs Fixed
 ++++++++++
 
+- LP #143946: Provide a more informative error message when a
+  WebDAV PUT fails.
+
 - LP #143261: The (very old-fashioned) Zope2.debug interactive request
   debugger still referred to the toplevel module ``Zope``, which was
   renamed to ``Zope2`` a long time ago.

src/webdav/NullResource.py

@@ -166,7 +166,9 @@ class NullResource(Persistent, Implicit, Resource):
         try:
             parent._verifyObjectPaste(ob.__of__(parent), 0)
         except CopyError:
-            raise Unauthorized, sys.exc_info()[1]
+             sMsg = 'Unable to create object of class %s in %s: %s' % \
+                    (ob.__class__, repr(parent), sys.exc_info()[1],)
+             raise Unauthorized, sMsg
 
         # Delegate actual PUT handling to the new object,
         # SDS: But just *after* it has been stored.

src/webdav/tests/testNullResource.py

@@ -48,6 +48,33 @@ class TestNullResource(unittest.TestCase):
         self.assertEqual(response.body, '')
         self.failUnless(response.locked)
 
+    def test_PUT_unauthorized_message(self):
+        # See https://bugs.launchpad.net/bugs/143946
+        import ExtensionClass
+        from OFS.CopySupport import CopyError
+        from zExceptions import Unauthorized
+        class DummyRequest:
+            def get_header(self, header, default=''):
+                return default
+            def get(self, name, default=None):
+                return default
+        class DummyResponse:
+            _server_version = 'Dummy' # emulate ZServer response
+            def setHeader(self, *args):
+                pass
+        class DummyParent(ExtensionClass.Base):
+            def _verifyObjectPaste(self, *args, **kw):
+                raise CopyError('Bad Boy!')
+        nonesuch = self._makeOne()
+        nonesuch.__parent__ = DummyParent()
+        request = DummyRequest()
+        response = DummyResponse()
+
+        try:
+            nonesuch.PUT(request, response)
+        except Unauthorized, e:
+            self.failUnless(str(e).startswith('Unable to create object'))
+
 
 def test_suite():
     return unittest.TestSuite((