Spring provides a SockJS-less Websocket endpoint at `ws://host:port/socketentry/websocket` without using the SockJS bucket and session URL componets: `ws://host:port/socketentry/{bucket}/{session}/websocket`
I. Ruiz, M. Nagappan, B. Adams, and A. Hassan. Proceedings of the 20th IEEE International Conference on Program Comprehension (ICPC), page 113--122. Passau, Germany, (June 2012)