Consume web service in ABAP with SOAP header

Question

I'm trying to call a SalesForce Web Service from ABAP.
After the login I use the WS_HEADER to pass header information.
  TRY.
Additional Header:
      CONCATENATE
      '<soap:Header>'
      '<s1:SessionHeader>'
      '<s1:sessionId>' login_output-result-session_id '</s1:sessionId>'
      '</s1:SessionHeader>'
      '</soap:Header>' INTO l_string.
convert to xstring
      l_xstring = cl_proxy_service=>cstring2xstring( l_string ).
      ws_header ?= obj_add->get_protocol('IF_WSPROTOCOL_WS_HEADER').
      IF NOT l_string IS INITIAL.
create iXML DOM document from XML xstring
        CALL FUNCTION 'SDIXML_XML_TO_DOM'
          EXPORTING
            xml           = l_xstring
          IMPORTING
            document      = xml_document
          EXCEPTIONS
            invalid_input = 1
            OTHERS        = 2.
        IF sy-subrc = 0 AND NOT xml_document IS INITIAL.
          xml_root = xml_document->get_root_element( ).
          xml_element ?= xml_root->get_first_child( ).
add header element by element to SOAP header
          WHILE NOT xml_element IS INITIAL.
            name = xml_element->get_name( ).
            namespace = xml_element->get_namespace_uri( ).
            namespace = 'urn:partner.soap.sforce.com'."xml_element->get_namespace_uri( ).
            IF NOT xml_element IS INITIAL.
            ENDIF.
get WS_HEADER protocol
            ws_header->set_request_header(
            name = name
            namespace = namespace
            dom = xml_element ).
            xml_element ?= xml_element->get_next( ).
          ENDWHILE.
        ENDIF.
      ENDIF.
    CATCH cx_ai_system_fault .
  ENDTRY.
I get the following exception: CX_SXML_PARSE_ERROR
I guess the error has to do with the wrong description of the additional header.
In soapUI the header looks like that:
   <soapenv:Header>
      <urn:SessionHeader>
         <urn:sessionId>1234567890</urn:sessionId>
      </urn:SessionHeader>
   </soapenv:Header>
Is there somebody who knows how I should "translate" this to ABAP?
Thanks,
Daniel

Answer 1

Hi Jelena
Thanks for your answer.
I've already created the proxy.
The question is how or where I get the correct format for the header of this string in ABAP:
CONCATENATE
'<soap:Header>'
'<s1:SessionHeader>'
'<s1:sessionId>' login_output-result-session_id '</s1:sessionId>'
'</s1:SessionHeader>'
'</soap:Header>' INTO l_string.
This example is wrong. I get the following error: CX_SXML_PARSE_ERROR
As I mentioned before in soapUI the header looks like that:
<soapenv:Header>
<urn:SessionHeader>
<urn:sessionId>1234567890</urn:sessionId>
</urn:SessionHeader>
</soapenv:Header>
Daniel