code: def dispatch_url(self, url_string):
          
          url, url_adapter, query_args = self.parse_url(url_string)
  
          try:
              endpoint, kwargs = url_adapter.match()
          except NotFound:
              raise NotSupported(url_string)
          except RequestRedirect as e:
              new_url = "{0.new_url}?{1}".format(e, url_encode(query_args))
              return self.dispatch_url(new_url)
  
          try:
              handler = import_string(endpoint)
              request = Request(url=url, args=query_args)
              return handler(request, **kwargs)
          except RequestRedirect as e:
              return self.dispatch_url(e.new_url)
docs: Dispatch the URL string to the target endpoint function.
  
          :param url_string: the origin URL string.
          :returns: the return value of calling dispatched function.