- https://docs.spring.io/spring-framework/docs/5.3.4/reference/html/web.html#websocket
- https://www.ruanyifeng.com/blog/2017/05/websocket.html
- https://developer.mozilla.org/zh-CN/docs/Web/API/Fetch_API/Using_Fetch
- LoggingWebSocketHandlerDecorator/ExceptionWebSocketHandlerDecorator默认启用：https://docs.spring.io/spring-framework/docs/5.3.4/reference/html/web.html#websocket-server-handshake