I'm trying to call a SOAP webservice from the Dutch land register (WSDL here). I first tried doing that using the pysimplesoap library. Although I do get relevant xml back, pysimplesoap gives a TypeError: Tag: IMKAD_Perceel invalid (type not found) (I created a SO question about that here). Since I suspect this to be a bug in pysimplesoap I'm now trying to use the suds library.
In pysimplesoap the following returned correct xml (but as I said pysimplesoap gave a TypeError):
from pysimplesoap.client import SoapClient
client = SoapClient(wsdl='http://www1.kadaster.nl/1/schemas/kik-inzage/20141101/verzoekTotInformatie-2.1.wsdl', username=xxx, password=xxx, trace=True)
response = client.VerzoekTotInformatie(
Aanvraag={
'berichtversie': '4.7', # Refers to the schema version: http://www.kadaster.nl/web/show?id=150593&op=/1/schemas/homepage.html
'klantReferentie': 'MyReference1', # Refers to something we can set ourselves.
'productAanduiding': '1185', # a four-digit code referring to whether the response should be in "XML" (1185), "PDF" (1191) or "XML and PDF" (1057).
'Ingang': {
'Object': {
'IMKAD_KadastraleAanduiding': {
'gemeente': 'ARNHEM',
'sectie': 'AC',
'perceelnummer': '1234'
}
}
}
}
)
This produced the xml below:
<soap:Body>
<VerzoekTotInformatieRequest xmlns="http://www.kadaster.nl/schemas/kik-inzage/20141101">
<Aanvraag xmlns="http://www.kadaster.nl/schemas/kik-inzage/ip-aanvraag/v20141101">
<berichtversie xmlns="http://www.kadaster.nl/schemas/kik-inzage/ip-aanvraag/v20141101">4.7</berichtversie>
<klantReferentie xmlns="http://www.kadaster.nl/schemas/kik-inzage/ip-aanvraag/v20141101">ARNHEM-AC-1234</klantReferentie>
<productAanduiding xmlns="http://www.kadaster.nl/schemas/kik-inzage/ip-aanvraag/v20141101">1185</productAanduiding>
<Ingang xmlns="http://www.kadaster.nl/schemas/kik-inzage/ip-aanvraag/v20141101">
<Object xmlns="http://www.kadaster.nl/schemas/kik-inzage/ip-aanvraag/v20141101">
<IMKAD_KadastraleAanduiding xmlns="http://www.kadaster.nl/schemas/kik-inzage/ip-aanvraag/v20141101">
<gemeente xmlns="http://www.kadaster.nl/schemas/kik-inzage/ip-aanvraag/v20141101">ARNHEM AC</gemeente>
<sectie xmlns="http://www.kadaster.nl/schemas/kik-inzage/ip-aanvraag/v20141101">AC</sectie>
<perceelnummer xmlns="http://www.kadaster.nl/schemas/kik-inzage/ip-aanvraag/v20141101">5569</perceelnummer>
</IMKAD_KadastraleAanduiding>
</Object>
</Ingang>
</Aanvraag>
</VerzoekTotInformatieRequest>
</soap:Body>
So now I tried changing this code to use suds instead. So far I came up with this:
from suds.client import Client
client = Client(url='http://www1.kadaster.nl/1/schemas/kik-inzage/20141101/verzoekTotInformatie-2.1.wsdl', username='xxx', password='xxx')
Aanvraag = client.factory.create('ns3:Aanvraag')
Aanvraag.berichtversie = '4.7'
Aanvraag.klantReferentie = 'MyReference1'
Aanvraag.productAanduiding = '1185'
IMKAD_KadastraleAanduiding = client.factory.create('ns3:IMKAD_KadastraleAanduiding')
IMKAD_KadastraleAanduiding.gemeente = 'ARNHEM'
IMKAD_KadastraleAanduiding.sectie = 'AC'
IMKAD_KadastraleAanduiding.perceelnummer = '1234'
Object = client.factory.create('ns3:Object')
Object.IMKAD_KadastraleAanduiding = IMKAD_KadastraleAanduiding
Ingang = client.factory.create('ns3:Ingang')
Ingang.Object = Object
Aanvraag.Ingang = Ingang
result = client.service.VerzoekTotInformatie(Aanvraag)
which produces the following xml:
<ns2:Body>
<ns0:VerzoekTotInformatieRequest>
<ns0:Aanvraag>
<ns1:berichtversie>4.7</ns1:berichtversie>
<ns1:klantReferentie>MyReference1</ns1:klantReferentie>
<ns1:productAanduiding>1185</ns1:productAanduiding>
<ns1:Ingang>
<ns1:Object>
<ns1:IMKAD_KadastraleAanduiding>
<ns1:gemeente>ARNHEM</ns1:gemeente>
<ns1:sectie>AC</ns1:sectie>
<ns1:perceelnummer>1234</ns1:perceelnummer>
</ns1:IMKAD_KadastraleAanduiding>
</ns1:Object>
</ns1:Ingang>
</ns0:Aanvraag>
</ns0:VerzoekTotInformatieRequest>
</ns2:Body>
Unfortunately, this results in the server giving back a Nullpointer:
Traceback (most recent call last):
File "<input>", line 1, in <module>
result = client.service.VerzoekTotInformatie(Aanvraag)
File "/Library/Python/2.7/site-packages/suds/client.py", line 542, in __call__
return client.invoke(args, kwargs)
File "/Library/Python/2.7/site-packages/suds/client.py", line 602, in invoke
result = self.send(soapenv)
File "/Library/Python/2.7/site-packages/suds/client.py", line 649, in send
result = self.failed(binding, e)
File "/Library/Python/2.7/site-packages/suds/client.py", line 702, in failed
r, p = binding.get_fault(reply)
File "/Library/Python/2.7/site-packages/suds/bindings/binding.py", line 265, in get_fault
raise WebFault(p, faultroot)
WebFault: Server raised fault: 'java.lang.NullPointerException'
This error is of course terribly unhelpful. The error gives no hint whatsoever on what causes the NullPointer.
If I look at the differences between the xml which pysimplesoap and suds send over the wire, the xml by suds is missing a lot of xmlns definitions (although I don't know whether they are needed) and the names of the tags include prefixes with for example ns0:. I don't know if these differences are relevant, and I also don't know how I would make suds create the same xml as pysimplesoap.
Although the wsdl file of the service is public, the service itself is paid (€60 yearly + €3 for every successful request). So I guess it is hard/impossible for people reading this to reproduce the issue, and I can't really give out my user credentials here.
But since I'm really stuck on this issue, maybe someone can give me some tips on how to debug this? For example; how can I make suds create the same xml as pysimplesoap? Or how I can get more information on the nullpointer?
Any help is welcome!
