https://blog.csdn.net/qq_37372007/article/details/82937584
使用netty实现一个多人聊天室--failed: Error during WebSocket handshake: Unexpected response code: 200
https://blog.csdn.net/qq_37372007/article/details/82937584
使用netty实现一个多人聊天室--failed: Error during WebSocket handshake: Unexpected response code: 200