• Netty-SocketIO+scoket-io-client实现实时聊天思路


    一、后端

    参考https://www.jianshu.com/p/c67853e729e2

    1、引入依赖

    <dependency>
        <groupId>com.corundumstudio.socketio</groupId>
        <artifactId>netty-socketio</artifactId>
        <version>1.7.7</version>
    </dependency>

    2、application.properties相关配置

    # host在本地测试可以设置为localhost或者本机IP,在Linux服务器跑可换成服务器IP
    socketio.host=localhost
    socketio.port=9099
    # 设置最大每帧处理数据的长度,防止他人利用大数据来攻击服务器
    socketio.maxFramePayloadLength=1048576
    # 设置http交互最大内容长度
    socketio.maxHttpContentLength=1048576
    # socket连接数大小(如只监听一个端口boss线程组为1即可)
    socketio.bossCount=1
    socketio.workCount=100
    socketio.allowCustomRequests=true
    # 协议升级超时时间(毫秒),默认10秒。HTTP握手升级为ws协议超时时间
    socketio.upgradeTimeout=1000000
    # Ping消息超时时间(毫秒),默认60秒,这个时间间隔内没有接收到心跳消息就会发送超时事件
    socketio.pingTimeout=6000000
    # Ping消息间隔(毫秒),默认25秒。客户端向服务器发送一条心跳消息间隔
    socketio.pingInterval=25000

    3、SocketIOConfig.java配置文件相关配置

     1 import com.corundumstudio.socketio.SocketConfig;
     2 import org.springframework.beans.factory.annotation.Value;
     3 import org.springframework.context.annotation.Bean;
     4 import org.springframework.context.annotation.Configuration;
     5 
     6 import com.corundumstudio.socketio.SocketIOServer;
     7 
     8 @Configuration
     9 public class SocketIOConfig {
    10 
    11     @Value("${socketio.host}")
    12     private String host;
    13 
    14     @Value("${socketio.port}")
    15     private Integer port;
    16 
    17     @Value("${socketio.bossCount}")
    18     private int bossCount;
    19 
    20     @Value("${socketio.workCount}")
    21     private int workCount;
    22 
    23     @Value("${socketio.allowCustomRequests}")
    24     private boolean allowCustomRequests;
    25 
    26     @Value("${socketio.upgradeTimeout}")
    27     private int upgradeTimeout;
    28 
    29     @Value("${socketio.pingTimeout}")
    30     private int pingTimeout;
    31 
    32     @Value("${socketio.pingInterval}")
    33     private int pingInterval;
    34 
    35     /**
    36      * 以下配置在上面的application.properties中已经注明
    37      * @return
    38      */
    39     @Bean
    40     public SocketIOServer socketIOServer() {
    41         SocketConfig socketConfig = new SocketConfig();
    42         socketConfig.setTcpNoDelay(true);
    43         socketConfig.setSoLinger(0);
    44         com.corundumstudio.socketio.Configuration config = new com.corundumstudio.socketio.Configuration();
    45         config.setSocketConfig(socketConfig);
    46         config.setHostname(host);
    47         config.setPort(port);
    48         config.setBossThreads(bossCount);
    49         config.setWorkerThreads(workCount);
    50         config.setAllowCustomRequests(allowCustomRequests);
    51         config.setUpgradeTimeout(upgradeTimeout);
    52         config.setPingTimeout(pingTimeout);
    53         config.setPingInterval(pingInterval);
    54         return new SocketIOServer(config);
    55     }
    56 }

    四、提供SocketIOService接口

    public interface SocketIOService {
    // 启动服务
        void start() throws Exception;
        
        // 停止服务
        void stop();
        
    }

    五、具体实现方法

    import java.util.List;
    import java.util.Map;
    import java.util.concurrent.ConcurrentHashMap;
    
    import javax.annotation.PostConstruct;
    import javax.annotation.PreDestroy;
    import org.apache.commons.lang3.StringUtils;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Service;
    
    import com.corundumstudio.socketio.SocketIOClient;
    import com.corundumstudio.socketio.SocketIOServer;
    
    @Service(value = "socketIOService")
    public class SocketIOServiceImpl implements SocketIOService {
    
        // 用来存已连接的客户端
        private static Map<String, SocketIOClient> clientMap = new ConcurrentHashMap<>();
    
        @Autowired
        private SocketIOServer socketIOServer;
    
        /**
         * Spring IoC容器创建之后,在加载SocketIOServiceImpl Bean之后启动
         * @throws Exception
         */
        @PostConstruct
        private void autoStartup() throws Exception {
            start();
        }
    
        /**
         * Spring IoC容器在销毁SocketIOServiceImpl Bean之前关闭,避免重启项目服务端口占用问题
         * @throws Exception
         */
        @PreDestroy
        private void autoStop() throws Exception  {
            stop();
        }
        
        @Override
        public void start() {
            // 监听客户端连接
            socketIOServer.addConnectListener(client -> {
                String loginUserNum = getParamsByClient(client);
                if (loginUserNum != null) {
                    clientMap.put(loginUserNum, client);
                }
            });
    
            // 监听客户端断开连接
            socketIOServer.addDisconnectListener(client -> {
                String loginUserNum = getParamsByClient(client);
                if (loginUserNum != null) {
                    clientMap.remove(loginUserNum);
                    client.disconnect();
                }
            });
    
            // 处理自定义的事件,与连接监听类似,event为事件名,PushMessage为参数实体类
         // 监听前端发送的事件
    socketIOServer.addEventListener("event", PushMessage.class, (client, data, ackSender) -> { // TODO do something }); socketIOServer.start(); } @Override public void stop() { if (socketIOServer != null) { socketIOServer.stop(); socketIOServer = null; } } public void pushMessageToUser(PushMessage pushMessage) { String loginUserNum = pushMessage.getLoginUserNum(); if (StringUtils.isNotBlank(loginUserNum)) { SocketIOClient client = clientMap.get(loginUserNum); if (client != null)
             // 通过sendEvent给前端发送事件,并传递参数 client.sendEvent(PUSH_EVENT, pushMessage); } }
    /** * 此方法为获取client连接中的参数,可根据需求更改 * @param client * @return */ private String getParamsByClient(SocketIOClient client) { // 从请求的连接中拿出参数(这里的loginUserNum必须是唯一标识) Map<String, List<String>> params = client.getHandshakeData().getUrlParams(); List<String> list = params.get("loginUserNum"); if (list != null && list.size() > 0) { return list.get(0); } return null; } }

    二、前端

    1、下载

    npm install socket.io-client

    2、引入

    import io from 'socket.io-client';

    3、监听连接、自定义事件、退出

    mounted {
      // 连接参数
      let opts = new Object();
      // 连接scoket服务器,ip为socket地址
      var socket = io('ip', opts);
      // 监听连接后的回调
      socket.on('connect', function(){});
      // 监听自定义事件,event为事件名,并接受后台传过来的参数    
      socket.on('event', function(data){});
      // 监听退出后的回调函数
      socket.on('disconnect', function(){});
    }

    4、发送事件

    // event为事件名,data为参数
    socket.emit('event', data);

    三、总结

    1、前端可以通过socket.on来监听,socket.emit来发送事件。

    2、后端可以通过SocketIOClient的sendEvent发送事件,socketIOServer.addDisconnectListener来监听。

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  • 原文地址:https://www.cnblogs.com/liuyu666/p/13550125.html
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