401 error using Authentification on DHL-SOAP API with zeep

Question

regarding Authentification on DHL-SOAP API with zeep

i tried authenticating with the code provided by derAndre. but for me it didn't worked.

i am just trying to get the "getVersion" operation but it failed because of the Authentification.
But if i use it, i get an 401.

Server returned response (401) with invalid XML: Invalid XML content received (Space required after the Public Identifier, line 1, column 50).
Content: b'\n\n401 Unauthorized\n\n
Unauthorized
\n
This server could not verify that you\nare authorized to access the document\nrequested.  Either you supplied the wrong\ncredentials (e.g., bad password), or your\nbrowser doesn\'t understand how to supply\nthe credentials required.
\n\n'

this is the code, and i'm not getting the hang of it.

session = Session()
session.auth = HTTPBasicAuth(settings.DHL_SOAP_API_USER,settings.DHL_SOAP_API_PW)
client = Client(settings.DHL_WSDL, transport=Transport(session=session))
# Build Authentification header for API-Endpoint using zeep xsd
header = xsd.Element(
    '{http://test.python-zeep.org}Authentification',
    xsd.ComplexType([
        xsd.Element(
            '{http://test.python-zeep.org}user',
            xsd.String()),
        xsd.Element(
            '{http://test.python-zeep.org}signature',
            xsd.String()),
    ])
)
header_value = header(user=settings.DHL_SOAP_API_USER, signature=settings.DHL_SOAP_API_PW)
result = client.service.getVersion('majorRelease:?', 'minorRelease:?', _soapheaders=[header_value])

Answer 1

I was facing similar problem and found a solution by following zeep debugger

Note that, my purpose was to test data via sandbox endpoint: https://cig.dhl.de/services/sandbox/soap

However, the debugger said, it was sending request to production endpoint: https://cig.dhl.de/services/production/soap

The problem was in the wsdl file that I stored geschaeftskundenversand-api-3.2.2.wsdl locally.

If you notice, by the end of the file production address has been set to production by default.

 <soap:address location="https://cig.dhl.de/services/production/soap"/>

Just set it to -

<soap:address location="https://cig.dhl.de/services/sandbox/soap"/>

Everything else are okay.

One just needs to make sure that the endpoint is okay. Because credentials are bit different for these two endpoints.