Rails - Oct 2006 - ActionWebService - how to raise SOAP::FaultError

I''m testing SOAP interoperability between a command line ruby script  
and a Ruby on Rails based web service.

I can''t seem to figure out how to get the service to raise an  
exception that gets propagated back to the client as a  
SOAP::FaultError, complete with fault code and fault string.

Running my client ruby script against an Apache AXIS based Java SOAP  
Server or NUSOAP based PHP correctly gives me back an error of the form:

#<SOAP::FaultError: authentication failed>

from which I can then extract

   fault code: 1001
   fault string: authentication failed

Running against a Rails based Web service no matter what I raise on  
the server, it always seems to end up on the client as a  
#<RuntimeError: authentication failed>.

Any suggestions?

Here''s the code for my service:

   def authenticate(login, password, version)
     if (login == ''khans'')
       return [1, ''Shehryar'', ''Khan'']
     elsif
       raise ''authentication failed''
     end
   end

Here''s the code for my client:

require ''soap/wsdlDriver''

# Ruby on Rails URL
factory = SOAP::WSDLDriverFactory.new("http://localhost:3000/service/ 
wsdl")

soap = factory.create_rpc_driver
begin
     soap_response =
soap.authenticate("khans","bollox","1.0")

     puts
">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>"
     puts "Service.authenticate() succeeded:"
     puts "  id: "+soap_response[0].to_s
     puts "  firstname: "+soap_response[1].to_s
     puts "  lastname: "+soap_response[2].to_s
     puts
">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>"

rescue => e

     puts
">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>"
     puts "Service.authenticate() failed:"
     puts "  fault code: "+e.faultcode.to_s
     puts "  fault string: "+e.faultstring.to_s
     puts
">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>"

end
soap.reset_stream


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