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Asked: 2026-05-11T14:32:33+00:00

I am playing around trying to call a simple SOAP webservice using the following

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I am playing around trying to call a simple SOAP webservice using the following code in the Python interpreter:

from SOAPpy import WSDL wsdl = 'http://www.webservicex.net/whois.asmx?wsdl' proxy = WSDL.Proxy(wsdl) proxy.soapproxy.config.dumpSOAPOut=1 proxy.soapproxy.config.dumpSOAPIn=1 proxy.GetWhoIS(HostName='google.com')

(Yep, I’m new to Python, doing the diveintopython thing…)

The call to the GetWhoIS method fails – otherwise I wouldn’t be asking here, I guess. Here’s my outgoing SOAP:

<?xml version='1.0' encoding='UTF-8'?> <SOAP-ENV:Envelope   SOAP-ENV:encodingStyle='http://schemas.xmlsoap.org/soap/encoding/'   xmlns:SOAP-ENC='http://schemas.xmlsoap.org/soap/encoding/'   xmlns:xsi='http://www.w3.org/1999/XMLSchema-instance'   xmlns:SOAP-ENV='http://schemas.xmlsoap.org/soap/envelope/'   xmlns:xsd='http://www.w3.org/1999/XMLSchema'>   <SOAP-ENV:Body>     <GetWhoIS SOAP-ENC:root='1'>       <HostName xsi:type='xsd:string'>google.com</HostName>     </GetWhoIS>   </SOAP-ENV:Body> </SOAP-ENV:Envelope>

And here’s the incoming response.

<?xml version='1.0' encoding='utf-8'?> <soap:Envelope     xmlns:soap='http://schemas.xmlsoap.org/soap/envelope/'     xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance'     xmlns:xsd='http://www.w3.org/2001/XMLSchema'>   <soap:Body>     <soap:Fault>       <faultcode>soap:Server</faultcode>       <faultstring>            System.Web.Services.Protocols.SoapException:            Server was unable to process request. ---&gt;            System.ArgumentNullException: Value cannot be null.          at whois.whois.GetWhoIS(String HostName)          --- End of inner exception stack trace ---       </faultstring>       <detail />     </soap:Fault>   </soap:Body> </soap:Envelope>

(manually formatted for easier reading)

Can anyone tell me what am I doing wrong?

Ideally both in terms of use of SOAPpy, and why the SOAP message is incorrect.

Thanks!

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1 Answer

  1. Your call seems all right to me, i think this could be a soappy problem or misconfigured server (although i have not checked this thoroughly).

    This document also suggests incompatibilities between soappy and webservicex.net: http://users.jyu.fi/~mweber/teaching/ITKS545/exercises/ex5.pdf

    How i would work around this in this specific case?

    import urllib  url_handle = urllib.urlopen( 'http://www.webservicex.net/whois.asmx/GetWhoIS?HostName=%s' \                              % ('www.google.com') ) print url_handle.read()
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