respond_to_invalid_request

# File actioncable/lib/action_cable/connection/base.rb, line 211
        def respond_to_invalid_request
          close if websocket.alive?

          logger.error invalid_request_message
          logger.info finished_request_message
          [ 404, { 'Content-Type' => 'text/plain' }, [ 'Page not found' ] ]
        end