问题整理

1. websocket handshake 404 : 
http://www.jfinal.com/feedback/687
http://www.oschina.net/question/170972_128842
https://www.oschina.net/question/1756518_238747

2. demo
http://www.cnblogs.com/likun10579/p/5450209.html
http://blog.csdn.net/wilsonke/article/details/22397819
http://blog.csdn.net/ssrc0604hx/article/details/41694121
http://www.cnblogs.com/likun10579/p/5450209.html
http://blog.csdn.net/a79412906/article/details/9393515