module ActionController::Rescue

def process_action(*args)
  super
rescue Exception => exception
  rescue_with_handler(exception) || raise(exception)
end

def rescue_with_handler(exception)
  if (exception.respond_to?(:original_exception) &&
      (orig_exception = exception.original_exception) &&
      handler_for_rescue(orig_exception))
    exception = orig_exception
  end
  super(exception)
end