Unable to successfully login to DACS Station SOAP API via Python Suds 1.4.5

charlie.smith

I am trying to use the DACS Station Soap API on DACS 7.7. This DACS has been running fine with our RTDS for some time, and I now want to try automate our usage of DACS using Python on Linux. I have looked at the code examples, but when logging in, I get the following error:

from suds.client import Client
url = 'http://localhost:8080/DacsWS/DacsWebServiceService?wsdl'
client = Client(url

l = client.factory.create("dacsAdministratorLogin")
l.aAdministratorName.mAdministratorName = "reuter"
l.aAdministratorPassword.mAdministratorPassword = "<redacted>"
client.service.getDacsAdministratorDefinition(l)

output is

2024-03-19 09:59:24,805 ERROR [suds.client] <?xml version="1.0" encoding="UTF-8"?>
<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ns0="http://dacsWebService.rfa.reuters.com/" xmlns:ns1="http://schemas.xmlsoap.org/soap/envelope/">
   <SOAP-ENV:Header/>
   <ns1:Body>
      <ns0:getDacsAdministratorDefinition>
         <loginAttribute>
            <aAdministratorName>
               <mAdministratorName>reuter</mAdministratorName>
            </aAdministratorName>
            <aAdministratorPassword>
               <mAdministratorPassword>p_reuter</mAdministratorPassword>
            </aAdministratorPassword>
         </loginAttribute>
      </ns0:getDacsAdministratorDefinition>
   </ns1:Body>
</SOAP-ENV:Envelope>
.
.
.
WebFault: b"Server raised fault: 'java.lang.NullPointerException'"

I also tried

l = client.factory.create("dacsAdministratorLogin")
l.aAdministratorName = "reuter"
l.aAdministratorPassword = "<redacted>"
client.service.getDacsAdministratorDefinition(l).aResult.mErrorText

which gets further as we don't get a 500, but we this returns `Invalid Administrator Name`

I made sure that within DACS, that I have checked the "Enable Web Service Usage" (see attached screenshot).

Does anyone have any pointers on how I can get this working? I am using Suds 1.4.5 on Python 3.8. Thanks in advance.

Jirapongse

@charlie.smith

Thank you for reaching out to us.

I checked the DACS Web Sevices Programmer's Guide and found that the getDacsAdministratorDefinition method requires two parameters.

The code should look like this:

_dl = client.factory.create('dacsAdministratorLogin')
_dl.aAdministratorName.mAdministratorName         = dacsLogin
_dl.aAdministratorPassword.mAdministratorPassword = dacsPasswd


_dn = client.factory.create('dacsAdministratorName')
_dn.mAdministratorName = "reuter"
_adminDef = client.service.getDacsAdministratorDefinition(_dl, _dn)
print(_adminDef)

charlie.smith

Thanks @Jirapongse. I have updated my code but I am still getting the same NullPointerException error. The transmitted XML is:

2024-03-20 08:34:16,983 ERROR [suds.client] <?xml version="1.0" encoding="UTF-8"?>
<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ns0="http://dacsWebService.rfa.reuters.com/" xmlns:ns1="http://schemas.xmlsoap.org/soap/envelope/">
   <SOAP-ENV:Header/>
   <ns1:Body>
      <ns0:getDacsAdministratorDefinition>
         <loginAttribute>
            <aAdministratorName>
               <mAdministratorName>reuter</mAdministratorName>
            </aAdministratorName>
            <aAdministratorPassword>
               <mAdministratorPassword>redacted</mAdministratorPassword>
            </aAdministratorPassword>
         </loginAttribute>
         <adminName>
            <mAdministratorName>reuter</mAdministratorName>
         </adminName>
      </ns0:getDacsAdministratorDefinition>
   </ns1:Body>
</SOAP-ENV:Envelope>

Jirapongse

@charlie.smith

I tested the request on SOAP UI and it works fine.

You can contact the DACS support team directly to verify if the DACS WS is working properly.