在springboot里面使用HttpSessionConfigurator报错

Question

package cn.springbootlearn.socket;

import cn.spring.inter.bean.ResponseData;
import cn.spring.inter.bean.RoundData;
import cn.spring.inter.bean.User;
import cn.spring.inter.bean.UserGridInfo;
import cn.spring.inter.utils.ChessDataCompute;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import org.springframework.stereotype.Controller;

import javax.servlet.http.HttpSession;
import javax.websocket.CloseReason;
import javax.websocket.EndpointConfig;
import javax.websocket.OnClose;
import javax.websocket.OnError;
import javax.websocket.OnMessage;
import javax.websocket.OnOpen;
import javax.websocket.Session;
import javax.websocket.server.PathParam;
import javax.websocket.server.ServerEndpoint;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.CopyOnWriteArraySet;


@Controller
@ServerEndpoint(value="/websocket/{info}", configurator = HttpSessionConfigurator.class)
public class Socket {
    //静态变量，用来记录当前在线连接数。应该把它设计成线程安全的。
    private static int onlineCount = 0;
    /*websocket 客户端会话 通过Session 向客户端发送数据*/
    private Session session;
    /*线程安全set 存放每个客户端处理消息的对象*/
    private static CopyOnWriteArraySet<Socket> webSocketSet = new CopyOnWriteArraySet();
    /*websocket 连接建立成功后进行调用*/


    private static Map<String, String> userList = new HashMap<String, String>();

    private static SimpleDateFormat df = new SimpleDateFormat("HH:mm:ss");//创建时间格式对象

    /**
     * 功能：创建一个房间的集合，用来存放房间
     * concurrent包的线程安全Set，用来存放每个客户端对应的MyWebSocket对象。
     * 若要实现服务端与单一客户端通信的话，可以使用Map来存放，其中Key可以为用户标识
     */
    private static ConcurrentHashMap<String, ConcurrentHashMap<String, Socket>> roomList = new  ConcurrentHashMap<String,ConcurrentHashMap<String, Socket>>();

    //重新加入房间的标示；
    private int rejoin = 0;
    static {
        roomList.put("room1", new ConcurrentHashMap<String, Socket>());
        roomList.put("room2", new ConcurrentHashMap<String, Socket>());
        roomList.put("wuxian20200424", new ConcurrentHashMap<String, Socket>());
    }

    private static Map<String, String> recordMap = new HashMap<String,String>();
    Map<String, String[]> userMap = new HashMap<String,String[]>();

    @OnOpen
    public void onOpen(@PathParam(value = "info") String param, Session session, EndpointConfig config) {
        this.session = session;
        String flag = param.split("[|]")[0];         //标识
        String roomId = param.split("[|]")[1];        //成员名


        // 获取当前用户的session
        System.out.println("sessionId = " + session.getId());
        HttpSession httpSession = (HttpSession) config.getUserProperties().get(HttpSession.class.getName());
        User user  = (User) httpSession.getAttribute("user"); // 获得当前用户信息
    }
}

package cn.springbootlearn.socket;

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

/**
 * @author abbottLiu
 * @Description
 * @date 2020/04/28
 */
public class HttpSessionConfigurator extends ServerEndpointConfig.Configurator{

    @Override
    public void modifyHandshake(ServerEndpointConfig config, HandshakeRequest request, HandshakeResponse response) {
        HttpSession session = (HttpSession) request.getHttpSession();
        config.getUserProperties().put(HttpSession.class.getName(), session);
    }
}

Answer 1

没有示例这边不好还原测试。
倒是在网上找到了一个似乎相近的问题答案，你可以尝试看看。

Springboot-WebSocket获取HttpSession问题

Answer 2

这个可能是来自前端建立websocket连接时的错误。
localhost和127.0.0.1其实并不是同一个连接。
可以采用拼接来解决这个问题：

//例如:
var host = window.location.host;
var url = "ws://"+host+"/chatRoom/null";