Error when calling a hosted WCF in Service Application anonymously

Question

Hi,
I have a WCF service hosted in SharePoint 2013 service application, I am able to call this endpoint when i am logged in but after i enabled the anonymous access in sharepoint, i am not able to call the WCF endpoint and the error that i am getting: "The
security token request cannot be completed"
Log Error in Details:
2014-02-13 12:01:52Z Severity:Error
ThreadID:6548 ManagedThreadName:Pool_ef4d_0
Message:System.Web.HttpException (0x80004005): Exception processing request ---> System.Web.HttpException (0x80004005): Exception handling secured request ---> System.InvalidOperationException: The security token request cannot be completed.
   at Microsoft.SharePoint.SPSecurityContext.SecurityTokenForServiceContext(Uri contextUri)
   at Microsoft.SharePoint.SPChannelFactoryOperations.InternalCreateChannelActingAsLoggedOnUser[TChannel](ChannelFactory`1 factory, EndpointAddress address, Uri via)
   at myServiceApp.Service.BaseServiceClient.GetChannel[TChannel](SPServiceLoadBalancerContext loadBalancerContext, Boolean asProcess)
   at myServiceApp.Service.BaseServiceClient.ExecuteOnChannel[TChannel](CodeToExecuteOnChannel`1 codeToExecute, Boolean asProcess)
   at myServiceApp.Service.Client.MyMethod(IsAllowedRequest request)
As you see, the error is related to the trust relationship between the WCF and the Security Token Service is not able to authenticate the anonymous user. since the last call for a sharepoint method InternalCreateChannelActingAsLoggedOnUser which assume there
is a logged in user.
This is the web.config for my endpoint WCF hosted in the Service App:
Anyone has went through this and could recommend a fix ?
Mostafa Elzoghbi

Answer 1

Hi Sam,
The correct code for creating a popup window will be:
  data lo_window_manager type ref to if_wd_window_manager.
  data lo_api_component  type ref to if_wd_component.
  data lo_window         type ref to if_wd_window.
  lo_api_component  = wd_comp_controller->wd_get_api( ).
  lo_window_manager = lo_api_component->get_window_manager( ).
  lo_window         = lo_window_manager->create_window(
                     window_name            = 'WINDOW_NAME'
*                    title                  =
*                    close_in_any_case      = abap_true
                     message_display_mode   = if_wd_window=>co_msg_display_mode_selected
*                    close_button           = abap_true
                     button_kind            = if_wd_window=>co_buttons_okcancel
                     message_type           = if_wd_window=>co_msg_type_none
                     default_button         = if_wd_window=>co_button_ok
  lo_window->open( ).
Hope this helps.
Regards,
Ram