package com.imdroid.beidou.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.socket.server.standard.ServerEndpointExporter;


import javax.servlet.http.HttpSession;
import javax.websocket.HandshakeResponse;
import javax.websocket.server.HandshakeRequest;
import javax.websocket.server.ServerEndpointConfig;

@Configuration
public class WebSocketConfig extends ServerEndpointConfig.Configurator{

    /* 修改握手,就是在握手协议建立之前修改其中携带的内容 */
    @Override
    public void modifyHandshake(ServerEndpointConfig sec, HandshakeRequest request, HandshakeResponse response) {
        HttpSession httpSession = (HttpSession)request.getHttpSession();
        if (httpSession != null) {
            // 读取session域中存储的数据
            sec.getUserProperties().put(HttpSession.class.getName(),httpSession);
        }
        super.modifyHandshake(sec, request, response);
    }

    @Bean
    public ServerEndpointExporter serverEndpointExporter(){
        return new ServerEndpointExporter();
    }
}