Web service reference - request error

Question

Hi all,
I have created a webservice reference to a webservice (drived by tomcat7 and axis2) of our system. Somehow the request Apex makes for the requests in this webservice, aren't correct. (Apex version 4.1.1, on Oracle 10.2.0.3 DB)
In the webservice there are a lot of operations. Below is a snippet of the WSDL, with two operations: test_functie and testconnection. The first operation just checks if the webservice is working, the second one checks the connection to the database.
<?xml version="1.0" encoding="UTF-8"?>
<wsdl:definitions targetNamespace="http://zeno.socho.nl" xmlns:ns="http://zeno.socho.nl" xmlns:wsaw="http://www.w3.org/2006/05/addressing/wsdl" xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/" xmlns:ax21="http://zeno.socho.nl/xsd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/">
<wsdl:documentation>
    Please Type your service description here
  </wsdl:documentation>
  <wsdl:types>
    <xs:schema attributeFormDefault="qualified" elementFormDefault="qualified" targetNamespace="http://zeno.socho.nl" xmlns:ax22="http://zeno.socho.nl/xsd">
      <xs:import namespace="http://zeno.socho.nl/xsd"/>
      <xs:element name="test_functie">
        <xs:complexType>
          <xs:sequence>
            <xs:element minOccurs="0" name="text" nillable="true" type="xs:string"/>
          </xs:sequence>
        </xs:complexType>
      </xs:element>
      <xs:element name="test_functieResponse">
        <xs:complexType>
          <xs:sequence>
            <xs:element minOccurs="0" name="return" nillable="true" type="xs:string"/>
          </xs:sequence>
        </xs:complexType>
      </xs:element>
      <xs:element name="testConnection">
        <xs:complexType>
          <xs:sequence>
            <xs:element minOccurs="0" name="requestTag" nillable="true" type="xs:string"/>
          </xs:sequence>
        </xs:complexType>
      </xs:element>
      <xs:element name="testConnectionResponse">
        <xs:complexType>
          <xs:sequence>
            <xs:element minOccurs="0" name="return" nillable="true" type="ax22:Result"/>
          </xs:sequence>
        </xs:complexType>
      </xs:element>
    </xs:schema>
  </wsdl:types>
  <wsdl:message name="test_functieResponse">
    <wsdl:part name="parameters" element="ns:test_functieResponse">
    </wsdl:part>
  </wsdl:message>
  <wsdl:message name="testConnectionResponse">
    <wsdl:part name="parameters" element="ns:testConnectionResponse">
    </wsdl:part>
  </wsdl:message>
  <wsdl:message name="test_functieRequest">
    <wsdl:part name="parameters" element="ns:test_functie">
    </wsdl:part>
  </wsdl:message>
  <wsdl:message name="testConnectionRequest">
    <wsdl:part name="parameters" element="ns:testConnection">
    </wsdl:part>
  </wsdl:message>
  <wsdl:portType name="WebApiV2PortType">
    <wsdl:operation name="testConnection">
      <wsdl:input message="ns:testConnectionRequest" wsaw:Action="urn:testConnection">
    </wsdl:input>
      <wsdl:output message="ns:testConnectionResponse" wsaw:Action="urn:testConnectionResponse">
    </wsdl:output>
    </wsdl:operation>
    <wsdl:operation name="test_functie">
      <wsdl:input message="ns:test_functieRequest" wsaw:Action="urn:test_functie">
    </wsdl:input>
      <wsdl:output message="ns:test_functieResponse" wsaw:Action="urn:test_functieResponse">
    </wsdl:output>
    </wsdl:operation>
  </wsdl:portType>
  <wsdl:binding name="WebApiV2Soap11Binding" type="ns:WebApiV2PortType">
    <soap:binding style="document" transport="http://schemas.xmlsoap.org/soap/http"/>
    <wsdl:operation name="testConnection">
      <soap:operation soapAction="http://zeno.socho.nl/testConnection"/>
      <wsdl:input>
        <soap:body use="literal"/>
      </wsdl:input>
      <wsdl:output>
        <soap:body use="literal"/>
      </wsdl:output>
    </wsdl:operation>
    <wsdl:operation name="test_functie">
      <soap:operation soapAction="http://zeno.socho.nl/test_functie"/>
      <wsdl:input>
        <soap:body use="literal"/>
      </wsdl:input>
      <wsdl:output>
        <soap:body use="literal"/>
      </wsdl:output>
    </wsdl:operation>
  </wsdl:binding>
  <wsdl:service name="WebApiV2">
    <wsdl:port name="WebApiV2HttpSoap11Endpoint" binding="ns:WebApiV2Soap11Binding">
      <soap:address location="http://yyy.socho.internal:8080/axis2/services/WebApiV2/"/>
    </wsdl:port>
  </wsdl:service>
</wsdl:definitions>When I perform a test of the testconnection operation, apex makes this request:
<?xml version='1.0' encoding='UTF-8'?>
<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <SOAP-ENV:Body>
    <ns1:testConnection xmlns:ns1="http://zeno.socho.nl">
    <!-- No namespace! -->
    <requestTag>test</requestTag>
    </ns1:testConnection>
  </SOAP-ENV:Body>
</SOAP-ENV:Envelope>the response is as follows:
<?xml version='1.0' encoding='UTF-8'?>
  <soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
  <soapenv:Body>
    <soapenv:Fault>
      <faultcode>soapenv:Server</faultcode>
      <faultstring>org.apache.axis2.databinding.ADBException: Unexpected subelement requestTag</faultstring>
      <detail />
    </soapenv:Fault>
  </soapenv:Body>
</soapenv:Envelope>When I use SoapUI to invoke the same operation, then the request is:
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:zeno="http://zeno.socho.nl">
   <soapenv:Header/>
   <soapenv:Body>
      <zeno:testConnection>
         <!-- SoapUI does provide a namespace! -->
         <zeno:requestTag>test</zeno:requestTag>
      </zeno:testConnection>
   </soapenv:Body>
</soapenv:Envelope>and the response is:
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
   <soapenv:Body>
      <ns:testConnectionResponse xmlns:ns="http://zeno.socho.nl">
         <ax21:return xsi:type="ax21:Result" xmlns:ax21="http://zeno.socho.nl/xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
            <ax21:errorNo>0</ax21:errorNo>
            <ax21:errorTxt>OK</ax21:errorTxt>
            <ax21:requestTag>?</ax21:requestTag>
         </ax21:return>
      </ns:testConnectionResponse>
   </soapenv:Body>
</soapenv:Envelope>Does Apex interprete my wdsl incorrect? Seems like the namespace is missing in the request from Apex!

Answer 1

Over the last couple of days, I did some debugging, trying to find the cause for this problem. This is what I've found:
in WSDL documents, on the schema node in the wsdl:types branch, there's an element elementFormDefault that states if the schema uses qualified or unqualified namespaces. qualified means that every child node must have a namespace. When it's unqualified, only the root element has to have a namespace, the child nodes don't require one.
It seems that Apex stores this in the table WWV_FLOW_WS_PARAMETERS, in the field FORM_QUALIFIED. All the rows in that table for my webservice has a value of 'N' for FORM_QUALIFIED, that's why Apex doesn't add a namespace to the child element.
I did some testing and it seems that Apex can't handle WSDL documents with *2* schema brances in the wsdl:types branch. our WSDL has that. I got a simplified version of the WSDL (that lacks some features) that only has one schema branch in the wsdl:types branch; then the 'FORM_QUALIFIED' columns is properly filled with a Y. When I manually update the WWV_FLOW_WS_PARAMETERS table and change the N in an Y in the FORM_QUALIFIED for my WSDL, the requests are properly generated!
Of course I don't want to manually update the Apex repository and want to work towards a proper solution. It seems like a bug though in the Apex WSDL parsing. What is the proper way to file a bug request to the valuable Apex developers for this?