-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Willi Langenberger wrote:
Trying to get a Zope DateTime object (as dictionary value) via xml-rpc gives on OverflowError! You can try it yourself:
(I used a freshly installed Zope-2.9.3 [with python-2.4.3] on Linux FC3; but other versions should behave equally.)
Add a Python Script in the Zope OFS root folder:
return {'root_modification_time': container.bobobase_modification_time()}
The www request returns:
{'root_modification_time': DateTime('2006/05/13 14:33:12.445 GMT+2')}
But the XML-RPC returns:
xmlrpclib.Fault: (-1, 'Unexpected Zope exception: exceptions.OverflowError - long int exceeds XML-RPC limits'
The reason for this is, that the DateTime object is treated as a normal instance by xmlrpclib, ie __dict__ is marshalled (which, unfortunately, contains the attribute '_millis', which is usually too big).
It would be better anyway, if Zope DateTime objects would be marshalled as XML-RPC dates (dateTime.iso8601). Eg like that:
--- xmlrpclib.py.ori 2006-05-13 13:29:45.606954800 +0200 +++ xmlrpclib.py.wlang 2006-05-13 13:32:45.923542512 +0200 @@ -701,10 +701,15 @@
def dump_instance(self, value, write): # check for special wrappers + import DateTime as ZopeDateTime if value.__class__ in WRAPPERS: self.write = write value.encode(self) del self.write + elif value.__class__ == ZopeDateTime.DateTime: + self.write = write + DateTime(value).encode(self) + del self.write else: # store instance attributes as a struct (really?) self.dump_struct(value.__dict__, write)
However, this would modify xmlrpclib.py from the python distribution, wich is plain ugly.
Can anyone think of a better solution? Is it possible to change xmlrpclib.WRAPPERS from Zope, but leave python's xmlrpclib.py unaffected?
A monkeypatch of the module should work fine, as the 'WRAPPERS' object is looked up as a global at each use. If anybody *else* imports it using 'from xmlrpc import WRAPPERS', then they won't see the new registration after the monkeypatch, because 'WRAPPERS' is a tuple, and must therefore be replaced, rather than mutated. Tres. - -- =================================================================== Tres Seaver +1 202-558-7113 tseaver@palladion.com Palladion Software "Excellence by Design" http://palladion.com -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iD8DBQFEZ16G+gerLs4ltQ4RAkVcAKC65Q7BndJYWAMrTxAnMQpGE6PSPwCcDeei wH2FCbIssrTcXUL5zaMpehw= =5HQX -----END PGP SIGNATURE-----