Spring WebSocket, 스프링 공식문서

 

https://docs.spring.io/spring-framework/reference/

Spring Framework Documentation :: Spring Framework

Web on Servlet Stack	WebSockets
Servlet-stack web applications        built on the Servlet API        and deployed to Servlet containers	WebSocket messaging             that includes raw WebSocket interactions , WebSocket emulation through SockJS , and publish-subscribe messaging through STOMP               as a sub-protocol over WebSocket.

 

WebSocket API	1. WebSocketHandler 예) ~ extends TextWebSocketHandler        ~ implements WebSocketHandler 2. WebSocket Handshake 예) ~ implements HandshakeInterceptor
The Spring Framework provides a WebSocket API      that you can use to write client- and server-side applications             that handle WebSocket messages.

The easiest way to customize the initial HTTP WebSocket handshake request

                    is through a HandshakeInterceptor

You can use such an interceptor to preclude the handshake 

                                     or to make any attributes available to the WebSocketSession

A more advanced option is to extend the DefaultHandshakeHandler 

                                                               that performs the steps of the WebSocket handshake 

              , including validating the client origin, negotiating a sub-protocol, and other details.