[Pywebsvcs-talk] ZSI & EBI web services

[Anakim B. <ab...@us...>]

I'm trying to use ZSI (release 1.4.1) to access web services exposed by EBI 
(http://www.ebi.ac.uk/Tools/webservices/WSDbfetch.html).
My first attempt resulted in a failure:

>>> from ZSI import ServiceProxy
>>> p=ServiceProxy('db.wsdl')
>>> p.getSupportedDBs()
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "/usr/lib/python2.3/site-packages/ZSI/ServiceProxy.py", line 82, in 
__call__
    return self.parent()._call(self.__name__, *args, **kwargs)
  File "/usr/lib/python2.3/site-packages/ZSI/ServiceProxy.py", line 65, in 
_call
    apply(getattr(binding, callinfo.methodName), args)
  File "/usr/lib/python2.3/site-packages/ZSI/client.py", line 28, in __call__
    requesttypecode=TC.Any(self.name, aslist=1))
  File "/usr/lib/python2.3/site-packages/ZSI/client.py", line 132, in RPC
    return self.Receive(replytype, **kw)
  File "/usr/lib/python2.3/site-packages/ZSI/client.py", line 261, in Receive
    raise FaultException(msg)
ZSI.FaultException: The AXIS engine could not find a target service to invoke!  
targetService is null

Taking a look at the SOAP message ZSI generated and comparing it with the one 
by the Java client EBI provides, I think I've found the problem:

--- ZSI ---

<?xml version="1.0" encoding="utf-8"?>
<SOAP-ENV:Envelope
  xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/"
  xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xmlns:xsd="http://www.w3.org/2001/XMLSchema"
  xmlns:ZSI="http://www.zolera.com/schemas/ZSI/"
  SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" >
<SOAP-ENV:Body
>
<getSupportedDBs>
</getSupportedDBs>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>

-----------

--- Java client ---

<?xml version="1.0" encoding="UTF-8"?>
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" 
xmlns:xsd="http://www.w3.org/2001/XMLSchema" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
 <soapenv:Body>
  <ns1:getSupportedDBs 
soapenv:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" 
xmlns:ns1="urn:Dbfetch"/>
 </soapenv:Body>
</soapenv:Envelope>

-----------

The <getSupportedDBs> tag should be <ns1:getSupportedDBs 
xmlns:ns1="urn:Dbfetch"/>; if I manually change the ZSI request adding the 
namespace, everything works.
Is there any way I can tell ZSI to do that automatically?

Thanks for the help

-- 
	Anakim Border
	ab...@us...
	http://pydc.sourceforge.net