Building SOAP request from WSDL

Question

I need to execute a SOAP request to an external server. I have never worked with SOAP before, but I know the basics of REST. I've been given this following WSDL file and this example query:

<Messages>
    <Version Ds_Version="0.0">
        <Message>
            <Detail>
                <Ds_MerchantCode>999008881</Ds_MerchantCode>
                <Ds_Terminal>1</Ds_Terminal>
                <Ds_Order>5799L</Ds_Order>
                <Ds_TransactionType>3</Ds_TransactionType>
            </Detail>
        </Message>
    </Version>
    <Signature>UfECD0KD9Wwo1iqY6PYZoJxw8KwMUz8m18bgLyH3BCI=</Signature>
    <SignatureVersion>HMAC_SHA256_V1</SignatureVersion>
</Messages>

I'm using Postman in order to test the API. Following some instructions I found on the internet, I added a Content-Type HTTP header with value text/xml and the SOAPAction HTTP header with value consultaOperaciones as found in the WSDL file.

I've set this body:

<?xml version="1.0"?>
<soap:Envelope
xmlns:soap="http://www.w3.org/2003/05/soap-envelope/"
soap:encodingStyle="http://www.w3.org/2003/05/soap-encoding">
    <soap:Body xmlns:m="http://webservices.apl02.redsys.es">
        <m:consultaOperacionesRequest>
            <Messages>
                <Version Ds_Version="0.0">
                    <Message>
                        <Transaction>
                            <Ds_MerchantCode>999008881</Ds_MerchantCode>
                            <Ds_Terminal>1</Ds_Terminal>
                            <Ds_Order>5799L</Ds_Order>
                            <Ds_TransactionType>3</Ds_TransactionType>
                        </Transaction>
                    </Message>
                </Version>
                <Signature>1KoxTgTakbTprzJ2N/e9JJ8yw/C3QzeNafbUMCNGSFM=</Signature>
                <SignatureVersion>HMAC_SHA256_V1</SignatureVersion>
            </Messages>
        </m:consultaOperacionesRequest>
    </soap:Body>
</soap:Envelope>

However, when I send the request I receive the following error message:

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    <soapenv:Header/>
    <soapenv:Body>
        <soapenv:Fault>
            <faultcode>Server</faultcode>
            <faultstring>Internal Error</faultstring>
        </soapenv:Fault>
    </soapenv:Body>
</soapenv:Envelope>

It's a generic SOAP error message, therefore I think that the problem has to be related to the codification instead of the external service.

Thanks in advance.

Neo Neo · Accepted Answer · 2019-02-09T18:01:44

In the WSDL file you will see that the XML should be sent as a string:

<element name="consultaOperaciones">
    <complexType>
        <sequence>
            <element name="cadenaXML" nillable="true" type="xsd:string"/>
        </sequence>
    </complexType>
</element>

Hence the XML sent should be:

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:web="http://webservices.apl02.redsys.es">
   <soapenv:Header/>
   <soapenv:Body>
      <web:consultaOperaciones>
         <cadenaXML><![CDATA[
         <Messages>
    <Version Ds_Version="0.0">
        <Message>
            <Detail>
                <Ds_MerchantCode>999008881</Ds_MerchantCode>
                <Ds_Terminal>1</Ds_Terminal>
                <Ds_Order>5799L</Ds_Order>
                <Ds_TransactionType>3</Ds_TransactionType>
            </Detail>
        </Message>
    </Version>
    <Signature>UfECD0KD9Wwo1iqY6PYZoJxw8KwMUz8m18bgLyH3BCI=</Signature>
    <SignatureVersion>HMAC_SHA256_V1</SignatureVersion>
</Messages>
         ]]>
         </cadenaXML>
      </web:consultaOperaciones>
   </soapenv:Body>
</soapenv:Envelope>

Note that we are using CDATA because as mentioned the XML message should be sent as a string based on the WSDL. I have tried running it and got the response:

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
   <soapenv:Header/>
   <soapenv:Body>
      <p259:consultaOperacionesResponse xmlns:p259="http://webservices.apl02.redsys.es">
         <consultaOperacionesReturn><![CDATA[<Messages><Version Ds_Version="0.0"><Message><ErrorMsg><Ds_ErrorCode>XML0023</Ds_ErrorCode></ErrorMsg></Message></Version></Messages>]]></consultaOperacionesReturn>
      </p259:consultaOperacionesResponse>
   </soapenv:Body>
</soapenv:Envelope>

This means that your message is being parsed now because there are no server errors and a consultaOperacionesResponse is being sent which looks legit. The error seems to be related to the data being sent but in general the API is working fine as expected.

Building SOAP request from WSDL

1 Answers