Handler for request is stream or not.
        :param request: Request object
        :return: bool

def is_stream_handler(self, request):
        """ Handler for request is stream or not.
        :param request: Request object
        :return: bool
        """
        handler = self.get(request)[0]
        if (hasattr(handler, 'view_class') and
                hasattr(handler.view_class, request.method.lower())):
            handler = getattr(handler.view_class, request.method.lower())
        return hasattr(handler, 'is_stream')