docs: def request_middleware(api=None):
      """Registers a middleware function that will be called on every request"""
      def decorator(middleware_method):
          apply_to_api = hug.API(api) if api else hug.api.from_object(middleware_method)
  
          class MiddlewareRouter(object):
              __slots__ = ()
  
              def process_request(self, request, response):
                  return middleware_method(request, response)
  
          apply_to_api.http.add_middleware(MiddlewareRouter())
          return middleware_method
      return decorator