netty与websockt实现聊天

配置websockt：

import lombok.Data;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Configuration;

/**
 * websocket配置
 */
@Data
@Configuration
@ConfigurationProperties(prefix = "ws")
public class WsConfig {
    /**
     * websockt服务端口，不可和web服务同一个端口
     */
    private Integer port=8779;
    /**
     * 心跳超时时间-单位-秒
     */
    private Integer heartTimeout = 60;
    /**
     * 默认匹配的路径
     */
    private String url="/";
}

返回实体载体：

import com.alibaba.fastjson2.JSON;
import lombok.Data;

import java.io.Serializable;

@Data
public class MsgBody implements Serializable {
    public enum MsgType{
        /**
         * 普通文字消息
         */
        text,
        /**
         * 图片消息
         */
        img,
        /**
         * 文件
         */
        file,
    }
    public enum Type{
        /**
         * 自己
         */
        self,
        /**
         * 别人
         */
        other,
    }
    private Type type;
    private MsgType msgType;
    /**
     * 消息主体
     */
    private String msgContent;
    public String toJson(){
        return JSON.toJSONString(this);
    }
}

import com.alibaba.fastjson2.JSON;

import java.io.Serializable;
import java.util.LinkedHashMap;

/**
 * websocket返回载体
 */
public class WsBean extends LinkedHashMap<String,Object> implements Serializable {
    /**
     * 指定调用前端的回调函数
     */
    public enum CallbackEm{
        /**
         * 通知回调函数
         */
        notice,
        /**
         * 收到消息的回调
         */
        receive_msg,
    }

    public WsBean(CallbackEm callbackEm,Object data) {
        super();
        this.put("code",callbackEm.name());
        this.put("data",data);
    }
    public static WsBean get(CallbackEm callbackEm){
        return new WsBean(callbackEm,"");
    }
    public static WsBean get(CallbackEm callbackEm,Object data){
        return new WsBean(callbackEm,data);
    }
    public WsBean setData(Object data){
        this.put("data",data);
        return this;
    }
    public WsBean set(String key,Object value){
        this.put(key,value);
        return this;
    }
    public String toJson(){
        return JSON.toJSONString(this);
    }

}

netty通道：

import cn.hutool.core.map.BiMap;
import io.netty.channel.Channel;
import io.netty.channel.ChannelId;
import io.netty.channel.group.DefaultChannelGroup;
import io.netty.handler.codec.http.websocketx.TextWebSocketFrame;
import io.netty.util.concurrent.GlobalEventExecutor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Component;

import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;

/**
 * 这个类用来处理用户和连接的关联关系
 */
@Slf4j
@Component
public class NioWebSocketChannelPool {
    /**
     * 用户保持连接
     */
    private final DefaultChannelGroup channels = new DefaultChannelGroup(GlobalEventExecutor.INSTANCE);
    /**
     * 保持连接用户对应的长连接id，此为双向绑定
     */
    private final BiMap<String, ChannelId> bindUserMap = new BiMap<>(new ConcurrentHashMap<>());
    /**
     * 新增一个客户端通道
     */
    public void addChannel(Channel channel){
        channels.add(channel);
    }
    /**
     * 移除一个客户端通道
     * @param channel
     */
    public void removeChannel(Channel channel){
        String mapKey = bindUserMap.getKey(channel.id());
        if (mapKey != null){
            bindUserMap.remove(mapKey);
        }
        channels.remove(channel);
    }
    /**
     * 绑定用户
     */
    public void bindUser(String userId,Channel channel){
        bindUserMap.put(userId,channel.id());
    }
    /**
     * 向用户推送消息
     */
    public void sendToUser(String userId,WsBean data){
        ChannelId channelId = bindUserMap.get(userId);
        if (channelId != null){
            channels.find(channelId).writeAndFlush(new TextWebSocketFrame(data.toJson()));
        }
    }
    public void sendToUser(String userId,MsgBody data){
        ChannelId channelId = bindUserMap.get(userId);
        if (channelId != null){
            channels.find(channelId).writeAndFlush(new TextWebSocketFrame(data.toJson()));
        }
    }
    public BiMap<String,ChannelId> getBindUserMap(){
        return bindUserMap;
    }
    /**
     * 群发推送消息
     */
    public void writeAndFlush(WsBean data){
        Set<String> onlineIds = getBindUserMap().keySet();
        onlineIds.forEach(userId->{
            ChannelId channelId = bindUserMap.get(userId);
            if (channelId != null){
                channels.find(channelId).writeAndFlush(new TextWebSocketFrame(data.toJson()));
            }
        });
    }


}

netty处理类：

import cn.hutool.core.util.StrUtil;
import com.xx.framework.config.WsConfig;
import io.netty.channel.ChannelHandler;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.handler.codec.http.FullHttpRequest;
import io.netty.handler.codec.http.websocketx.*;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Component;

import javax.annotation.Resource;
import java.util.HashMap;
import java.util.Map;

/**
 * 处理端
 */
@Slf4j
@ChannelHandler.Sharable
@Component
public class NioWebSocketHandler extends SimpleChannelInboundHandler<WebSocketFrame> {
    @Resource
    private WsConfig wsConfig;
    @Resource
    private NioWebSocketChannelPool webSocketChannelPool;

    @Override
    public void channelActive(ChannelHandlerContext ctx) throws Exception {
        log.info("客户端连接：{}",ctx.channel().id());
        webSocketChannelPool.addChannel(ctx.channel());
        super.channelActive(ctx);
    }

    @Override
    public void channelInactive(ChannelHandlerContext ctx) throws Exception {
        log.info("客户端端口连接：{}",ctx.channel().id());
        webSocketChannelPool.removeChannel(ctx.channel());
        super.channelInactive(ctx);
    }

    @Override
    public void channelReadComplete(ChannelHandlerContext ctx) throws Exception {
        ctx.channel().flush();
        super.channelReadComplete(ctx);
    }

    @Override
    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
        log.info("客户端请求数据类型:{}",msg.getClass());
        if (msg instanceof FullHttpRequest){
            fullHttpRequestHandler(ctx,(FullHttpRequest)msg);
        }
        super.channelRead(ctx, msg);
    }

    /**
     * 处理连接请求，客户端websockt发送握手包时会执行第一次请求
     * @param ctx
     * @param request
     */
    private void fullHttpRequestHandler(ChannelHandlerContext ctx, FullHttpRequest request) {
        String uri = request.getUri();
        Map<String,String> params = getParams(uri);
        log.info("客户端请求参数:{}",params);
        /**
         * 判断请求路径是否跟配置中的一致
         */
        if (wsConfig.getUrl().equals(getBasePath(uri))){
            /**
             * 因为有可能携带了参数，导致客户端一致无法返回握手包，因此在校验通过后，重置请求路径
             */
            request.setUri(wsConfig.getUrl());
        }else{
            ctx.close();
        }
        String userId = params.get("user_id");
        if (StrUtil.isBlank(userId)){
            log.info("用户ID为空，无法登录");
            return;
        }
        webSocketChannelPool.bindUser(userId,ctx.channel());
    }

    /**
     * 获取URI中参数以外部分路径
     * @param uri
     * @return
     */
    private String getBasePath(String uri) {
        if (uri == null || uri.isEmpty()){
            return null;
        }
        int idx = uri.indexOf("?");
        if (idx  == -1){
            return uri;
        }
        return uri.substring(0,idx);
    }

    /**
     * 请路径参数转换成Map对象，如果路径参数出现重复参数名，将以最后的参数值为准
     * @param uri
     * @return
     */
    private Map<String, String> getParams(String uri) {
        Map<String,String> params = new HashMap<>(10);
        int idx = uri.indexOf("?");
        if (idx != -1){
            String[] paramsArr = uri.substring(idx+1).split("&");
            for (String param:paramsArr){
                idx = param.indexOf("=");
                params.put(param.substring(0,idx),param.substring(idx+1));
            }
        }
        return params;
    }

    /**
     * 客户端发送断开请求处理
     */
    private void closeWebSocketFrameHandler(ChannelHandlerContext ctx, CloseWebSocketFrame frame){
                ctx.close();
    }

    /**
     * 创建连接之后，客户端发送的消息都会在这里处理
     */
    private void textWebSocketFrameHandler(ChannelHandlerContext ctx, TextWebSocketFrame frame){
        //客户端发送过来的内容不进行业务处理，原样返回,一般不做处理
//        log.info("收到客户端信息-channelId: {}, 消息内容: {}", ctx.channel().id(), frame.text());
    }

    /**
     * 处理客户端心跳包
     */
    private void  pingWebSocketFrameHandler(ChannelHandlerContext ctx, PingWebSocketFrame frame){
        ctx.channel().writeAndFlush(new PongWebSocketFrame(frame.content().retain()));
    }

    @Override
    protected void channelRead0(ChannelHandlerContext channelHandlerContext, WebSocketFrame webSocketFrame) throws Exception {
        //根据请求数量类型进厂分发处理
        if (webSocketFrame instanceof PingWebSocketFrame){
            PingWebSocketFrame pingWebSocketFrame = (PingWebSocketFrame) webSocketFrame;
            pingWebSocketFrameHandler(channelHandlerContext,pingWebSocketFrame);
        }else if (webSocketFrame instanceof TextWebSocketFrame){
            TextWebSocketFrame textWebSocketFrame = (TextWebSocketFrame) webSocketFrame;
            textWebSocketFrameHandler(channelHandlerContext,textWebSocketFrame);
        }else if (webSocketFrame instanceof CloseWebSocketFrame){
            CloseWebSocketFrame closeWebSocketFrame = (CloseWebSocketFrame) webSocketFrame;
            closeWebSocketFrameHandler(channelHandlerContext,closeWebSocketFrame);
        }
    }
}

netty服务类：

package com.xx.framework.ws;

import com.xx.framework.config.WsConfig;
import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.*;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.handler.codec.http.HttpObjectAggregator;
import io.netty.handler.codec.http.HttpServerCodec;
import io.netty.handler.codec.http.websocketx.WebSocketServerProtocolHandler;
import io.netty.handler.stream.ChunkedWriteHandler;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.DisposableBean;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.core.Ordered;
import org.springframework.stereotype.Component;

import javax.annotation.Resource;

/**
 * 服务端
 */
@Slf4j
@Component
public class NioWebSocketServer implements InitializingBean , DisposableBean, Ordered {
    @Resource
    private WsConfig wsConfig;
    @Resource
    private NioWebSocketHandler nioWebSocketHandler;
    private EventLoopGroup bossGroup;
    private EventLoopGroup workGroup;
    private ChannelFuture channelFuture;

    @Override
    public void destroy() throws Exception {
        log.info("shutting down netty server....");
        if (bossGroup != null){
            bossGroup.shutdownGracefully().sync();
        }
        if (workGroup != null){
            workGroup.shutdownGracefully().sync();
        }
        if (channelFuture != null){
            channelFuture.channel().closeFuture().syncUninterruptibly();
        }
        log.info("netty server shutdown");
    }


    @Override
    public void afterPropertiesSet() throws Exception {
        try{
            bossGroup = new NioEventLoopGroup();
            workGroup = new NioEventLoopGroup();

            ServerBootstrap serverBootstrap = new ServerBootstrap();
            serverBootstrap.option(ChannelOption.SO_BACKLOG,1024)
            .group(bossGroup,workGroup)
            .channel(NioServerSocketChannel.class)
            .localAddress(wsConfig.getPort())
            .childHandler(new ChannelInitializer<SocketChannel>() {
                @Override
                protected void initChannel(SocketChannel socketChannel) throws Exception {
                    ChannelPipeline pipeline = socketChannel.pipeline();
                    pipeline.addLast(new HttpServerCodec())
                            .addLast(new ChunkedWriteHandler())
                            .addLast(new HttpObjectAggregator(8192))
                            .addLast(nioWebSocketHandler)
                            .addLast(new WebSocketServerProtocolHandler(wsConfig.getUrl(),null,
                                    true));
                }
            });
            channelFuture = serverBootstrap.bind().sync();
        }finally {
            if (channelFuture != null && channelFuture.isSuccess()){
                log.info("netty server startup on port:{} (websockt)with context path '{}'",
                        wsConfig.getPort(),"/");
            }else{
                log.info("netty server startup failed");
                if (bossGroup != null){
                    bossGroup.shutdownGracefully().sync();
                }
                if (workGroup != null){
                    workGroup.shutdownGracefully().sync();
                }
            }
        }

    }

    @Override
    public int getOrder() {
        return 0;
    }
}

以上代码serviceImpl应用：

/**
     * 新增聊天记录
     *
     * @param chatRecord 聊天记录
     * @return 结果
     */
    @Override
    public int insertChatRecord(ChatRecord chatRecord) {
        MsgBody msgBody = new MsgBody();
        if (StrUtil.isNotBlank(chatRecord.getMsgType())){
            if (chatRecord.getMsgType().equals(MsgTypeEnum.TEXT.getMsgType())){
                msgBody.setMsgType(MsgBody.MsgType.text);
            }else if (chatRecord.getMsgType().equals(MsgTypeEnum.IMG.getMsgType())){
                msgBody.setMsgType(MsgBody.MsgType.img);
            }
        }
        msgBody.setMsgContent(chatRecord.getMsgContent());
        chatRecord.setMsgContent(JSON.toJSONString(msgBody));
        chatRecord.setId(IdUtils.getLongId());
        chatRecord.setCreateTime(DateUtils.getNowDate());
        int insert = chatRecordMapper.insertChatRecord(chatRecord);
        if(insert > 0){
            msgBody.setType(MsgBody.Type.self);
            //通知浏览器用户            webSocketChannelPool.sendToUser(chatRecord.getSendUserId().toString(),msgBody);
            msgBody.setType(MsgBody.Type.other);
            webSocketChannelPool.sendToUser(chatRecord.getReceiveUserId().toString(),msgBody);
        }
        return insert;
    }

文章来源地址https://www.toymoban.com/news/detail-678318.html

到了这里，关于netty与websockt实现聊天的文章就介绍完了。如果您还想了解更多内容，请在右上角搜索TOY模板网以前的文章或继续浏览下面的相关文章，希望大家以后多多支持TOY模板网！