Dieter Maurer escribió:
Garito wrote at 2006-11-8 02:50 +0100:
Please consider this code:
def __bobo_traverse__(self, REQUEST, name): obj = self.Propiedad(name) if obj is None: return self else: return obj
def Propiedad(self, propiedad): obj = getattr(self, propiedad, None) if obj is None: return obj # Añadir busqueda al catalogo else: if type(obj) == type(str('')) and obj.startswith('[') and obj.endswith(']'): return self.Expresion({'Expresion': obj[1:-1]})['Resultado'] return obj
I wonder why I can do:
<tal:b tal:replace='python: here.Propiedad("Modificacion")' />
but not:
<tal:b tal:replace='here/Modificacion' /> ... When I try here/Modificacion an unauthorized error trying to access Modificacion
What you see is an authentication weekness with "__bobo_traverse__":
Zope's security machinery requires acquisition wrappers to work reliably.
When "__bobo_traverse__" returns a non acquisition wrapped object without public security declarations, then the normal security check would not help.
Zope therefore tries to check whether a standard 'getattr' would return the same object and accept it in this case. Otherwise, it will raise "Unauthorized" with the intent that an unmotivated "Unauthorized" is better than giving access to some piece of information that should be protected.
In my view, the behaviour is buggy as "__bobo_traverse__" has no way to return a non-trivial elementary data type -- but almost surely, it will not be changed...
Hi Dieter! Then: what solution did you think will be the best solution for my request? Thanks! -- Mis Cosas http://blogs.sistes.net/Garito