springboot下spring方式实现Websocket并设置session时间

概述

springboot实现websocket有4种方式
servlet，spring，netty，stomp

使用下来spring方式是最简单的.

springboot版本：3.1.2
jdk：17

当前依赖版本

xml 复制代码

<dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-websocket</artifactId>
  <version>3.1.2</version>
</dependency>

spring方式demo

demo借鉴了ruoyi-plus

spring实现websocket处理核心就是AbstractWebSocketHandler+HandshakeInterceptor

HandshakeInterceptor实现握手前后处理，比如握手前鉴权
AbstractWebSocketHandler实现消息的接收，监听连接的建立+关闭，顺序在HandshakeInterceptor之后.

拦截器

java 复制代码

package org.xxx.xxx.websocket.interceptor;

import cn.dev33.satoken.session.SaSession;
import cn.dev33.satoken.stp.StpUtil;
import cn.hutool.core.lang.Assert;
import org.xxx.common.core.domain.model.LoginUser;
import org.xxx.common.core.exception.ServiceException;
import lombok.extern.slf4j.Slf4j;
import org.springframework.http.server.ServerHttpRequest;
import org.springframework.http.server.ServerHttpResponse;
import org.springframework.util.CollectionUtils;
import org.springframework.web.socket.WebSocketHandler;
import org.springframework.web.socket.server.HandshakeInterceptor;

import java.util.List;
import java.util.Map;

import static org.qps.common.websocket.constant.WebSocketConstants.LOGIN_USER_KEY;

/**
 * WebSocket握手请求的拦截器
 */
@Slf4j
public class PlusWebSocketInterceptor implements HandshakeInterceptor {

    /**
     * 握手前
     *
     * @param request    request
     * @param response   response
     * @param wsHandler  wsHandler
     * @param attributes attributes
     * @return 是否握手成功
     */
    @Override
    public boolean beforeHandshake(ServerHttpRequest request, ServerHttpResponse response, WebSocketHandler wsHandler, Map<String, Object> attributes) {
        attributes.put(LOGIN_USER_KEY, getLoginUser(request));
        List<String> tokenList = request.getHeaders().get("Sec-Websocket-Protocol");
        //再塞回协议头里
        response.getHeaders().put("Sec-Websocket-Protocol", tokenList);
        return true;
    }

    private LoginUser getLoginUser(ServerHttpRequest request){
        List<String> tokenList = request.getHeaders().get("Sec-Websocket-Protocol");
        if(CollectionUtils.isEmpty(tokenList)){
            throw new ServiceException("用户未登录");
        }
		//请求头的子协议中获取token
        String token = tokenList.get(0);


        return loginUser;
    }

    /**
     * 握手后
     *
     * @param request   request
     * @param response  response
     * @param wsHandler wsHandler
     * @param exception 异常
     */
    @Override
    public void afterHandshake(ServerHttpRequest request, ServerHttpResponse response, WebSocketHandler wsHandler, Exception exception) {

    }
}

消息接收+连接建立+关闭处理

java 复制代码

package org.xxx.common.websocket.handler;

import org.xxx.common.core.domain.model.LoginUser;
import org.xxx.common.websocket.dto.WebSocketMessageDto;
import org.xxx.common.websocket.holder.WebSocketSessionHolder;
import org.xxx.common.websocket.utils.WebSocketUtils;
import lombok.extern.slf4j.Slf4j;
import org.xxx.common.websocket.constant.WebSocketConstants;
import org.springframework.web.socket.*;
import org.springframework.web.socket.handler.AbstractWebSocketHandler;

import java.util.List;
import java.util.Objects;

/**
 * WebSocketHandler 实现类
 */
@Slf4j
public class PlusWebSocketHandler extends AbstractWebSocketHandler {

    /**
     * 连接成功后
     */
    @Override
    public void afterConnectionEstablished(WebSocketSession session) {
        LoginUser loginUser = (LoginUser) session.getAttributes().get(WebSocketConstants.LOGIN_USER_KEY);
        WebSocketSessionHolder.addSession(loginUser.getUserId(), session);
        log.info("[connect] sessionId: {},userId:{},userType:{}", session.getId(), loginUser.getUserId(), loginUser.getUserType());
    }

    /**
     * 处理发送来的文本消息
     *
     * @param session
     * @param message
     * @throws Exception
     */
    @Override
    protected void handleTextMessage(WebSocketSession session, TextMessage message) throws Exception {
        String msgPayload = message.getPayload();
		//todo 业务操作
    }

    @Override
    protected void handleBinaryMessage(WebSocketSession session, BinaryMessage message) throws Exception {
        super.handleBinaryMessage(session, message);
    }

    /**
     * 心跳监测的回复
     * 针对ping帧的恢复，非text形式的消息接收
     * @param session
     * @param message
     * @throws Exception
     */
    @Override
    protected void handlePongMessage(WebSocketSession session, PongMessage message) throws Exception {
        WebSocketUtils.sendPongMessage(session);
    }

    /**
     * 连接出错时
     *
     * @param session
     * @param exception
     * @throws Exception
     */
    @Override
    public void handleTransportError(WebSocketSession session, Throwable exception) throws Exception {
        log.error("[transport error] sessionId: {} , exception:{}", session.getId(), exception.getMessage());
    }

    /**
     * 连接关闭后
     *
     * @param session
     * @param status
     */
    @Override
    public void afterConnectionClosed(WebSocketSession session, CloseStatus status) {
        //连接关闭
        
    }

    /**
     * 是否支持分片消息
     *
     * @return
     */
    @Override
    public boolean supportsPartialMessages() {
        return false;
    }

}

配置类

java 复制代码

package org.xxx.common.websocket.config;

import cn.hutool.core.util.StrUtil;
import org.xxx.common.websocket.config.properties.WebSocketProperties;
import org.xxx.common.websocket.handler.PlusWebSocketHandler;
import org.xxx.common.websocket.interceptor.PlusWebSocketInterceptor;
import org.xxx.common.websocket.listener.WebSocketTopicListener;
import org.springframework.boot.autoconfigure.AutoConfiguration;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.web.socket.WebSocketHandler;
import org.springframework.web.socket.config.annotation.EnableWebSocket;
import org.springframework.web.socket.config.annotation.WebSocketConfigurer;
import org.springframework.web.socket.server.HandshakeInterceptor;
import org.springframework.web.socket.server.standard.ServletServerContainerFactoryBean;

/**
 * WebSocket 配置
 */
@AutoConfiguration
//我是走的自定义配置文件是否允许开启websocket
@ConditionalOnProperty(value = "websocket.enabled", havingValue = "true")
@EnableConfigurationProperties(WebSocketProperties.class)
@EnableWebSocket
public class WebSocketConfig{

    @Bean
    public WebSocketConfigurer webSocketConfigurer(HandshakeInterceptor handshakeInterceptor,
                                                   WebSocketHandler webSocketHandler,
                                                   WebSocketProperties webSocketProperties) {
        if (StrUtil.isBlank(webSocketProperties.getPath())) {
            webSocketProperties.setPath("/websocket");
        }

        if (StrUtil.isBlank(webSocketProperties.getAllowedOrigins())) {
            webSocketProperties.setAllowedOrigins("*");
        }

        return registry -> registry
            .addHandler(webSocketHandler, webSocketProperties.getPath())
            .addInterceptors(handshakeInterceptor)
            .setAllowedOrigins(webSocketProperties.getAllowedOrigins());
    }

    @Bean
    public HandshakeInterceptor handshakeInterceptor() {
        return new PlusWebSocketInterceptor();
    }

    @Bean
    public WebSocketHandler webSocketHandler() {
        return new PlusWebSocketHandler();
    }


    /**
     * 自定义服务器属性容器配置
     *
     * @return 自定义服务器容器属性配置
     */
    @Bean
    public ServletServerContainerFactoryBean createWebSocketContainer() {
        ServletServerContainerFactoryBean container = new ServletServerContainerFactoryBean();
        //session超时时间25s，客户端25s没有交互就断开连接
        container.setMaxSessionIdleTimeout(25 * 1000L);
        container.setMaxTextMessageBufferSize(10 * 1024);
        container.setMaxBinaryMessageBufferSize(10 * 1024);
        return container;
    }
}