Springboot+Vue+Websocket

2023-10-12  本文已影响0人  Buckler

Springboot+Vue+Websocket 事例

Springboot

1.Maven导入websocket依赖

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-websocket</artifactId>
</dependency>

2.加入websocket配置类

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

/**
 * @author :宗
 * @date :Created in 2023/10/13 10:31
 * @description:WebSocket配置类
 */
@Configuration
public class WebSocketConfig {
    @Bean
    public ServerEndpointExporter serverEndpointExporter() {
        System.out.println("config");
        return new ServerEndpointExporter();
    }
}

3.封装websocket常用方法

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.baomidou.mybatisplus.core.toolkit.StringUtils;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Component;

import javax.websocket.*;
import javax.websocket.server.PathParam;
import javax.websocket.server.ServerEndpoint;
import java.io.IOException;
import java.util.HashMap;
import java.util.Iterator;
import java.util.concurrent.ConcurrentHashMap;

/**
 * @author :宗
 * @date :Created in 2023/10/13 10:35
 * @description:
 */
@ServerEndpoint("/websocket/{userId}")
@Component
@Slf4j
public class WebSocketServer {
    /**
     * 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;
    /**
     * concurrent包的线程安全Set,用来存放每个客户端对应的MyWebSocket对象。
     */
    private static ConcurrentHashMap<String, WebSocketServer> webSocketMap = new ConcurrentHashMap<>();
    /**
     * 与某个客户端的连接会话,需要通过它来给客户端发送数据
     */
    private Session session;
    /**
     * 接收userId
     */
    private String userId = "";


    /**
     * 连接建立成功调用的方法
     */
    @OnOpen
    public void onOpen(Session session, @PathParam("userId") String userId) {
        System.out.println("-------------------> onOpen");
        this.session = session;
        this.userId = userId;
        if (webSocketMap.containsKey(userId)) {
            webSocketMap.remove(userId);
            //加入set中
        } else {
            webSocketMap.put(userId, this);
            //加入set中
            addOnlineCount();
            //在线数加1
        }

        log.info("用户连接:" + userId + ",当前在线人数为:" + getOnlineCount());

        try {
            HashMap<Object, Object> map = new HashMap<>();
            map.put("key", "连接成功");
            sendMessage(JSON.toJSONString(map));
        } catch (IOException e) {
            log.error("用户:" + userId + ",网络异常!!!!!!");
        }
    }

    /**
     * 连接关闭调用的方法
     */
    @OnClose
    public void onClose() {
        System.out.println("-------------------> onClose");
        if (webSocketMap.containsKey(userId)) {
            webSocketMap.remove(userId);
            //从set中删除
            subOnlineCount();
        }
        log.info("用户退出:" + userId + ",当前在线人数为:" + getOnlineCount());
    }

    /**
     * 收到客户端消息后调用的方法
     *
     * @param message 客户端发送过来的消息
     */
    @OnMessage
    public void onMessage(String message, Session session) {
        System.out.println("-------------------> onMessage");
        log.info("用户消息:" + userId + ",报文:" + message);
        //可以群发消息
        //消息保存到数据库、redis
        if (StringUtils.isNotBlank(message)) {
            try {
                //解析发送的报文
                JSONObject jsonObject = JSONObject.parseObject(message);
                //追加发送人(防止串改)
                jsonObject.put("fromUserId", this.userId);
                String fromUserId = jsonObject.getString("fromUserId");
                //传送给对应toUserId用户的websocket
                if (StringUtils.isNotBlank(fromUserId) && webSocketMap.containsKey(fromUserId)) {
                    webSocketMap.get(fromUserId).sendMessage(jsonObject.toJSONString());
                    //自定义-业务处理
//                    DeviceLocalThread.paramData.put(jsonObject.getString("group"),jsonObject.toJSONString());
                } else {
                    log.error("请求的userId:" + fromUserId + "不在该服务器上");
                    //否则不在这个服务器上,发送到mysql或者redis
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }

    /**
     * 发生错误时候
     *
     * @param session
     * @param error
     */
    @OnError
    public void onError(Session session, Throwable error) {
        System.out.println("-------------------> onError");
        log.error("用户错误:" + this.userId + ",原因:" + error.getMessage());
        error.printStackTrace();
    }

    /**
     * 实现服务器主动推送
     */
    public void sendMessage(String message) throws IOException {
        System.out.println("-------------------> sendMessage");
        //加入线程锁
        synchronized (session) {
            try {
                //同步发送信息
                this.session.getBasicRemote().sendText(message);
            } catch (IOException e) {
                log.error("服务器推送失败:" + e.getMessage());
            }
        }
    }

    /**
     * 发送自定义消息
     * */
    /**
     * 发送自定义消息
     *
     * @param message  发送的信息
     * @param toUserId 如果为null默认发送所有
     * @throws IOException
     */
    public static void sendInfo(String message, String toUserId) throws IOException {
        System.out.println("-------------------> sendInfo");
        //如果userId为空,向所有群体发送
        if (StringUtils.isEmpty(toUserId)) {
            //向所有用户发送信息
            Iterator<String> itera = webSocketMap.keySet().iterator();
            while (itera.hasNext()) {
                String keys = itera.next();
                WebSocketServer item = webSocketMap.get(keys);
                item.sendMessage(message);
            }
        }
        //如果不为空,则发送指定用户信息
        else if (webSocketMap.containsKey(toUserId)) {
            WebSocketServer item = webSocketMap.get(toUserId);
            item.sendMessage(message);
        } else {
            log.error("请求的userId:" + toUserId + "不在该服务器上");
        }
    }

    public static synchronized int getOnlineCount() {
        return onlineCount;
    }

    public static synchronized void addOnlineCount() {
        WebSocketServer.onlineCount++;
    }

    public static synchronized void subOnlineCount() {
        WebSocketServer.onlineCount--;
    }

    public static synchronized ConcurrentHashMap<String, WebSocketServer> getWebSocketMap() {
        return WebSocketServer.webSocketMap;
    }
}

4.1使用postman进行ws的测试

4.2使用网页进行ws测试(支持localhost本地测试)

网站地址:http://www.websocket-test.com/

Vue前端配置

在App.vue中添加如下代码,针对于使用框架的,直接复制就好了。

<script>
export default {
    data() {
        return {
            // socket参数
            socket: null,
            timeout: 10 * 1000, // 45秒一次心跳
            timeoutObj: null, // 心跳心跳倒计时
            serverTimeoutObj: null, // 心跳倒计时
            timeoutnum: null, // 断开 重连倒计时
            lockReconnect: false, // 防止
            websocket: null
        };
    },
    methods: {
        initWebSocket() {
            // WebSocket与普通的请求所用协议有所不同,ws等同于http,wss等同于https
            let wsUrl = 'ws://localhost:9898/api/v1/websocket/' + localStorage.getItem('ms_username');
            this.websocket = new WebSocket(wsUrl);
            this.websocket.onopen = this.websocketonopen;
            this.websocket.onerror = this.websocketonerror;
            this.websocket.onmessage = this.setOnmessageMessage;
            this.websocket.onclose = this.websocketclose;
            // 监听窗口关闭事件,当窗口关闭时,主动去关闭websocket连接,防止连接还没断开就关闭窗口,server端会抛异常。
            // window.onbeforeunload = that.onbeforeunload
        },
        start() {
            console.log('start');
            console.log(localStorage.getItem('ms_username'));
            //清除延时器
            this.timeoutObj && clearTimeout(this.timeoutObj);
            this.serverTimeoutObj && clearTimeout(this.serverTimeoutObj);
            this.timeoutObj = setTimeout(() => {
                if (this.websocket && this.websocket.readyState == 1) {
                    // let actions = { 'test': '12345' };
                    // this.websocket.send(JSON.stringify(actions));//发送消息,服务端返回信息,即表示连接良好,可以在socket的onmessage事件重置心跳机制函数
                } else {
                    this.reconnect();
                }
                //定义一个延时器等待服务器响应,若超时,则关闭连接,重新请求server建立socket连接
                this.serverTimeoutObj = setTimeout(() => {
                    this.websocket.close();
                }, this.timeout);
            }, this.timeout);
        },
        reset() { // 重置心跳
            // 清除时间
            clearTimeout(this.timeoutObj);
            clearTimeout(this.serverTimeoutObj);
            // 重启心跳
            this.start();
        },
        // 重新连接
        reconnect() {
            if (this.lockReconnect) return;
            this.lockReconnect = true;
            //没连接上会一直重连,设置延迟避免请求过多
            this.timeoutnum && clearTimeout(this.timeoutnum);
            this.timeoutnum = setTimeout(() => {
                this.initWebSocket();
                this.lockReconnect = false;
            }, 5000);
        },
        async setOnmessageMessage(event) {
            // console.log(event.data, '获得消息');
            this.reset();
            // 自定义全局监听事件
            window.dispatchEvent(new CustomEvent('onmessageWS', {
                detail: {
                    data: event.data
                }
            }));
            //发现消息进入 开始处理前端触发逻辑
            // if (event.data === 'success' || event.data === 'heartBath') return
        },
        websocketonopen() {
            //开启心跳
            this.start();
            console.log('WebSocket连接成功!!!' + new Date() + '----' + this.websocket.readyState);
            clearInterval(this.otimer);//停止
        },
        websocketonerror(e) {
            console.log('WebSocket连接发生错误' + e);
        },
        websocketclose(e) {
            this.websocket.close();
            clearTimeout(this.timeoutObj);
            clearTimeout(this.serverTimeoutObj);
            console.log('WebSocket连接关闭');
        },
        websocketsend(messsage) {
            that.websocket.send(messsage);
        },
        closeWebSocket() { // 关闭websocket
            that.websocket.close();
        }
        //  // 收到消息处理
        // getSocketData (res) {
        //  if (res.detail.data === 'success' || res.detail.data === 'heartBath') return
        //  // ...业务处理
        // }
    },
    mounted() {
        this.initWebSocket();
    }
};
</script>

在需要使用的界面添加监听器

methods:{
    getSocketData(res) {
            let parse = JSON.parse(res.detail.data);
            console.log(parse.msg);
        }
},
mounted() {
        window.addEventListener('onmessageWS', this.getSocketData);
    }

到此不出意外的话,【应该出意外了(bushi)】,就配置好了!

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