[Twisted-web] xmlrpc question

[lotek at softhome.net]

How can i do this in twisted? 

from SimpleXMLRPCServer import SimpleXMLRPCServer, 
SimpleXMLRPCRequestHandler 

class ExtendedXMLRPCRequestHandler(SimpleXMLRPCRequestHandler):
 def do_GET(self):
   #only allow a request for the crossdomain file
   #this can be changed to support GETs of any file if needed
   if self.path != '/crossdomain.xml':
     self.send_response(403)
     self.log_request(403)
     return 

   #open the crossdomain file and read its contents
   f = file('crossdomain.xml', 'r')
   msg = f.read()
   f.close() 

   #write the data to the socket along with valid HTTP headers
   res = 'HTTP/1.0 200 OK\r\nDate: %s\r\n\r\n%s' % \
     (self.date_time_string(),msg)
   self.wfile.write(res)
   self.log_request(200) 

class EchoClass:
 def echo(self, data):
   return data 

#create an instance of the class
s = EchoClass()
#create the server on localhost
server = SimpleXMLRPCServer(('', 8000), ExtendedXMLRPCRequestHandler)
#register the instance as a web service
server.register_instance(s)
#start accepting requests
server.serve_forever()