[Zope-dev] Protected session items?

[Lennart Regebro]

In TransientObject __guarded_setitem__ is just set to __setitem__.
This means, that everything you set in the session dictionary is 
changeable through user code. Is there a good reason for this?

I think it would be nice if I could set secret things in the session, 
mainly authentication information. If i do this currently, any user code 
can change it, which isn't exactly safe.

    REQUEST.SESSION['__ac_username'] = 'root'

Ooops! :)

This change:

     def __guarded_setitem__(self, k, v):
         if k[0] == '_':
             raise SomeThingOrAnotherError
         self.__setitem__(k, v)

Fixes that. Then you can only set it from protected code.
Is there some reason why this is NOT a good idea?

//Lennart