protect to_xml and/or disabled other format

hello, how protect to_xml and disabled other format or accpet only html format

example : if user type in url www.mysite/controller.xml , i want to redirect to another controller.

it's possible to use a routes to do that ?

one way would be a before_filter, e.g.

class ApplicationController < ActionController::Base

  before_filter :trap_xml

  def trap_xml     if params[:format] == 'xml' && params[:action] != 'my_xml_action'       redirect_to :controller => 'my_xml_controller', :action => 'my_xml_action'     end   end

end

yes it's this. thanks