[Twisted-Python] Mobile code using PB

[Tzahi Fadida]

Hi,
I am looking for a way to have a mobile code feature using PB very similar to 
pyro. The idea is like this: There is a server and a client.
The client trust the server completly.
The server does not trust the client.
The client gets arbitrary classes from the server and if a module
of the class is missing it raises an exception that will ultimately
result in downloading the module and injecting it.
If the module exists locally (same ver or something like that)
do not download it.
Basically i can override the security options like so:
pb.globalSecurity.isModuleAllowed=\
        jelly.DummySecurityOptions().isModuleAllowed
    pb.globalSecurity.isClassAllowed=\
        jelly.DummySecurityOptions().isClassAllowed
    pb.globalSecurity.isTypeAllowed=\
        jelly.DummySecurityOptions().isTypeAllowed

If i call a remote method and the returned value is an unknown class,
i recieve importError as "failure" which i can handle and 
send the module to the client 

However, if i send an unknown class as a parameter for a remote
method, the exception at the remote side is handled behind the scene
and i can't seem to trap it. Though, i am getting the importError 
failure message on the calling side (so it is somehow manageable).

Is there something that already exists so i won't have to reinvent the wheel?
using this trust model, do i really need pb.copyable and pb.remotecopy?
I.e. i want to replace these with custom isModuleAllowed isClassAllowed, 
etc...

10x.

-- 
Regards,
        Tzahi.
--
Tzahi Fadida
Blog: http://tzahi.blogsite.org | Home Site: http://tzahi.webhop.info
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