Calling Web Service - XML Parse Error

Question

Hello,
I have created Client proxy to call a Web Service. This service requires WS Header. This is my code to create the header:
concatenate
'<soap:Header>'
'  <wsse:Security mustUnderstand="1" xmlns:wsse="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd">'
  '  <wsse:UsernameToken Id="uuid-90128b0b">  '
     '  <wsse:Username>User123</wsse:Username>  '
     '  <wsse:Password Type="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wssusername-token-profile-1.0#PasswordText">Pass123</wsse:Password>  '
  '  </wsse:UsernameToken>  '
'  </wsse:Security> '
' </soap:Header> ' into l_string.
When I make the call, I receive the following error:
CODE                                        SoapFaultCode:4
ERRORTEXT                           #XML parse error.#
If I comment out UsernameToken element, the errors says that UsernameToken is missing, once I added it, I get XML parse error.
Here is the info from trace file:
XRFC>                                                                     <
XRFC>                                                                     <
XRFC> INFO 09:40:16: SOAP SESSION Protocol CL_SOAP_SESSION_PROTOCOL       <
XRFC> ->IF_SOAP_PROTOCOL~PRE_PROCESS() SOAP Session Protocol              <
XRFC> preprocessed                                                        <
XRFC>                                                                     <
XRFC> INFO 09:40:16: SOAP Transport Binding CL_SOAP_HTTP_TPBND_ROOT       <
XRFC> ->IF_SOAP_TRANSPORT_BINDING~SEND() Try to send message ( DEST =     <
XRFC> CCTEST_AUC ,PATH = ,URL = ,SOAP Action = "runTransaction" )         <
XRFC>                                                                     <
XRFC> INFO 09:40:16: SOAP Transport Binding CL_SOAP_HTTP_TPBND_ROOT       <
XRFC> ->IF_SOAP_TRANSPORT_BINDING~SEND() Message sent                     <
XRFC>                                                                     <
XRFC> INFO 09:40:16: SOAP Transport binding CL_SOAP_HTTP_TPBND_ROOT       <
XRFC> ->IF_SOAP_TRANSPORT_BINDING~RECEIVE() Try to receive message        <
XRFC>                                                                     <
XRFC> INFO 09:40:16: SOAP HTTP Binding CL_SOAP_HTTP_TPBND_ROOT->HANDLE    <
XRFC> STATUSCODE() Received return code 500 ( Internal Server Error )   <
XRFC>                                                                     <
XRFC> ERROR 09:40:16: SOAP Message CL_SOAP_MESSAGE->IF_SOAP_MESSAGE       <
XRFC> PART~INITFOR_DESERIALIZE() SOAP Fault Exception caught: :          
XML    <                                                                   
XRFC> parse error.                                                                               
<                   
XRFC>                                                                     <
Does anyone know what could be the problem?
Thanks,
Alex

Answer 1

I was able to fix the issue last night, it was caused by preparing WS header incorrectly. Originally, I did not use wsse prefix, and this was issue number 1. Once I added the prefix, I thought that the following code is incorrect because it was only retreiving 1 elements - UsernameToken.
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( ).
ws_header->set_request_header(
name = name
namespace = namespace
dom = xml_element ).
xml_element ?= xml_element->get_next( ).
endwhile.
So, I added to logic to get and then set all childeren, and this was the mistake. This is what caused "XML Parse Error". UsernameToken had already all info with user name and password. Once I removed the extra logic to get all 4 elements, the client proxy began working.
Regards,
Alex