External WebService call from CAF Core returns Invalid soap message

Question

I am trying to perform the very simple action of calling a WebService from a CAF Core app service.
  1. I imported the WS (Axis Web service running on NW 2004s SP9 server) with WSDL (option 2 on import external service page).
  2. I then assembled the call in an app service method and invoke it.
  3. I made sure to configure the end point for the service and the method using the External Service configuration.
When I execute the CAF core method using a simple Callable Object test client, I get the following error:
com.sap.caf.mp.base.exception.EngineException: Invalid soap message received
     at com.sap.caf.mp.core.data.service.manager.wsdl11.SOAPToMessageValueConverter.processComplexTypeMode(SOAPToMessageValueConverter.java:290)
     at com.sap.caf.mp.core.data.service.manager.wsdl11.SOAPToMessageValueConverter.generateComplexTypeValue(SOAPToMessageValueConverter.java:179)
     at
truncated.
I have also captured the XML request/reponse trace using tcpmon :
REQUEST:
POST /NWTestExpressWAR/services/TestExpressService HTTP/1.1
Host: 192.168.99.120:8078
Content-Type: text/xml; charset=UTF-8
Content-Length: 348
SOAPAction: http://www.testsys.com/TestExpressService/getAvailableModels
<?xml version="1.0" encoding="utf-8"?>
<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"><SOAP-ENV:Body><ns1:GetAvailableModels xmlns:ns1="http://www.testsys.com/TestExpressService"/></SOAP-ENV:Body></SOAP-ENV:Envelope>
RESPONSE:
HTTP/1.1 200 OK
Server: SAP J2EE Engine/7.00
Set-Cookie: saplb_*=(J2EE11743000)11743050; Version=1; Path=/
Content-Type: text/xml; charset=utf-8
Date: Mon, 04 Dec 2006 02:19:39 GMT
Transfer-Encoding: chunked
Set-Cookie: JSESSIONID=(J2EE11743000)ID1261187150DB11296929644926762709End; Version=1; Domain=192.168.99.120; Path=/
1f3
<?xml version="1.0" encoding="UTF-8"?><soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"><soapenv:Body><GetAvailableModelsResponse xmlns="http://www.testsys.com/TestExpressService"><modelNames><name>Great Oak Manufacturing-January03 Test</name><name>PriceCheck-default</name></modelNames><errorMessagesReturn/></GetAvailableModelsResponse></soapenv:Body></soapenv:Envelope>
0
The only problem I can think off is that the transfer-encoding is marked as chunked which is causing the characters '1f3' and '0' to appear after and before the response and that this is causing the app to crash.
192.168.99.120 is the server the hosts the WS. It is also a 2004s SP9 server. The client server that hosts the CAF core service is of the same configuration. 8078 is the port I redirect for tcpmon purposes.
Could anyone shed some light on my problem?
Thanks,
Pratap.

Answer 1

It looks like NW WS client cannot handle Transfer-encoding of chunked even though this is part of HTTP 1.1. What seems to be happening is that the NW WS client is creating a HTTP 1.1 request. The service (axis ws running on NW) seeing this is creating a HTTP 1.1 response w/ chunked encoding. However, the client cannot handle this encoding and barfs. The solution is to change the service to return a HTTP/1.0 response since NW cant handle HTTP 1.1.
Pratap.