--On Mittwoch, Mai 29, 2002 16:15:44 +0100 Toby Dickenson <tdickenson@geminidataloggers.com> 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 -------------------------------------------------------------------- AixtraWare Ingenieurbüro für Internetanwendungen Hüsgenstr. 33a, D-52457 Aldenhoven Telefon: +49-2464-8851, FAX: +49-2464-905163 -------------------------------------------------------------------- Key fingerprint = DA10 CC82 62F8 1DBB 39A1 1EDC 725B 3317 A8D7 C3A6 Keyserver: http://www.keyserver.net/en/