--On Mittwoch, Mai 29, 2002 16:15:44 +0100 Toby Dickenson
<[EMAIL PROTECTED]> wrote:
> On Wednesday 29 May 2002 3:24 pm, Joachim Schmitz wrote:
>> Hi,
>>
>> I want to acces a ZCatalog via xmlrpc, but
>>
>> server=xmlrpclib.Server("http://myserver.aixtraware.de";
>> ,BasicAuthTransport(username="user",password="pw
>> "))
>> r = server.Catalog()
>>
>> results in
>>
>> <Fault -1: "Unexpected Zope exception: cannot marshal <type
>> 'IOBTreeItems'> objects">
>>
>> What is to do, to enable marshalling of those types ?
>
> You could hack xmlrpclib to marshall those object, but I dont recommend
> it. Those objects can be big (but lazily evaluated), and you would be
> opening a significant denial of service vulnerability in your server.
But it also can be very interesting for exporting data from a Zope site, to
be used in other applications.
>
> I suggest you create a method (Python Script?) that makes the catalog
> query, sanitizes the response by making sure it is not too big, and
> returns a vanilla list or dictionary
I wrote a little pythonscript to export data from a ZPatterns Rack, where
the data is stored in a propertysheet:
res=context.Catalog()
t=[]
for m in sequence.sort(res,(('reg_id','cmp','desc'),)):
r=m.propertysheets.Basic.propertyItems()
t.append(r)
return t
This runs fine, when I test the script. But when I access it with xmlrpc, I
get:
<Fault -1: "Unexpected Zope exception: cannot marshal <type 'None'>
objects">
I changed Zope xmlrpclib.py and added to the Marshaller class:
def dump_None(self, value):
self.write("<value><string>None</string></value>\n")
dispatch[NoneType] = dump_None
Now that works, but I think the xmlrpclib.py, should be able to marshall
the "None" type.
Mit freundlichen Grüßen Joachim Schmitz
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