[Twisted-Python] Problem passing objects with perspective broker

[Fourat ZOUARI]

I didnt make bClass as copyable and unjellyed it just for the question, in
fact, the example i gave was the bare minimum of my source code to let
people clearly view the issue.

In the real problem, aClass has many references to other objects and if i
were to set them all as copyable and then unjellyed them all on the server
side, that would be a headache ...

Am asking whether if a clean solution exist for such problems.


On Sun, Jan 29, 2012 at 7:11 AM, David Ripton <dripton at ripton.net> wrote:

> On 01/29/12 00:57, Fourat ZOUARI wrote:
>
> > Whenever i try to pass an object (aClass) with a property with a second
> > object (bClass) Am getting:
> >
> >     *Unpersistable('Unpersistable data: instance of class amodule.bClass
> >     deemed insecure')*
> >
> >
> > The aClass is copyable and unjellied, the bClass is not.
> >
> > Here's my code:
> >
> > server.py:
> >
> >     from twisted.application import internet, service
> >     from twisted.spread import pb
> >     from amodule import PBServer
> >
> >     application = service.Application("Test app")
> >
> >     # Prepare managers
> >     clientManager = internet.TCPServer(8282,
> >     pb.PBServerFactory(PBServer()));
> >     clientManager.setServiceParent(application)
> >
> >     if __name__ == '__main__':
> >          print "Run with twistd"
> >          import sys
> >          sys.exit(1)
> >
> >
> > amodule.py:
> >
> >     from twisted.spread import pb
> >
> >     class bClass:
> >     """This is not a Copyable class
> >     """
> >
> >     class aClass(pb.RemoteCopy, pb.Copyable):
> >          b = bClass()
> >     pb.setUnjellyableForClass(aClass, aClass)
> >
> >     class PBServer(pb.Root):
> >          def remote_echo(self, a):
> >              return a.b
> >
> > Is there anyway to unjelly aClass and all the objects it can contain ?
> > because unjellying included object is a headache and may turn into dirty
> > code ...
>
> If you make bClass inherit from pb.Copyable and do
> pb.setUnjellyableForClass(bClass, bClass) then everything should work.
>
> Twisted knows how to do what you want, but it's refusing to do because
> you haven't marked bClass as safe to pass over the wire.
>
> --
> David Ripton    dripton at ripton.net
>
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