springCloud Finchley 微服务架构从入门到精通【十二】整合Redis实现Session共享以及zuul 转发产生的session失效问题

系统管理员 2023-10-17 21:56 11阅读 0赞

在springcloud微服务项目中，使用redis实现session共享是比较主流的，简单高效，直接代码实践：  
\#\#\#1、在pom.xml中添加相关依赖\#\#\#

<dependency>
    			<groupId>org.springframework.boot</groupId>
    			<artifactId>spring-boot-starter-data-redis</artifactId>
    		</dependency>
    		<dependency>  
    	        <groupId>org.springframework.session</groupId>  
    	        <artifactId>spring-session-data-redis</artifactId>  
    		</dependency>

\#\#\#2、添加redis配置\#\#\#  
service-user-session-redis-dev.yml

server:
      port: 8831
    management: 
      endpoints:
        web:
          exposure: 
            include: "*"
          cors:
            allowed-origins: "*"
            allowed-methods: "*" 
    spring: 
      redis:
        database: 0
        host: 192.168.248.131
        port: 6379
        password: 
        timeout: 20000
        #cluster:
          #nodes: 192.168.211.134:7000,192.168.211.134:7001
          #- 
          #max-redirects: 
        jedis:
          pool:
            max-active: 8
            max-wait: -1
            max-idle: 8
            min-idle: 0
    eureka:
      client:
        serviceUrl:
          defaultZone: http://localhost:8761/eureka/

\#\#\#3、添加redis配置类启用redis代码spring默认session\#\#\#  
RedisSessionConfig

package com.mayi.springcloud.config;
    
    import org.springframework.context.annotation.Configuration;
    import org.springframework.session.data.redis.config.annotation.web.http.EnableRedisHttpSession;
    
    @Configuration
    @EnableRedisHttpSession
    public class RedisSessionConfig {
        
    
    }

\#\#\#4、UserManagementController中添加测试方法\#\#\#

package com.mayi.springcloud.controller;
    
    import java.util.ArrayList;
    import java.util.Date;
    import java.util.HashMap;
    import java.util.List;
    import java.util.Map;
    
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpSession;
    
    import org.springframework.beans.factory.annotation.Value;
    import org.springframework.cloud.context.config.annotation.RefreshScope;
    import org.springframework.util.StringUtils;
    import org.springframework.web.bind.annotation.GetMapping;
    import org.springframework.web.bind.annotation.RestController;
    
    @RestController
    @RefreshScope
    public class UserManagementController {
        
    	
    	
    	/**
    	 * redis sesion共享
    	 * @param request
    	 * @return
    	 */
    	@GetMapping("/getUser")
    	public String getUser(HttpServletRequest request){
        
    		HttpSession session = request.getSession();
    		String username = (String)session.getAttribute("username");
    		if(StringUtils.isEmpty(username)){
        
    			session.setAttribute("username", "testSessionRedis|" + System.currentTimeMillis());
    		}
    		return username;
    	}
    }

\#\#\#5、修改网关配置\#\#\#  
springcloud项目中经过网关zuul转发请求后发生session失效问题，这是由于zuul默认会丢弃原来的session并生成新的session，解决方法网关配置文件

**service-zuul-dev.yml 中添加 sensitiveHeaders: “\*”**

server:
      port: 1100
    zuul: 
      ignoredServices: '*' #忽略所有未配置的service
      host:
        connect-timeout-millis: 20000
        socket-timeout-millis: 20000
      routes:
        user-service: #自定义名称
          path: /user/**
          serviceId: service-user #/user/开头的路径转发至service-user微服务
          sensitiveHeaders: "*"
        user-redis-session-service: 
          path: /user-session/**
          serviceId: service-user-session-redis
          sensitiveHeaders: "*" 
    hystrix: #hystrix配置
      command:
        default:
          execution:
            isolation:
              thread:
                timeoutInMilliseconds: 2500 
    ribbon: #ribbon负载均衡参数配置
      ReadTimeout: 5000
      ConnectTimeout: 5000
    eureka:
      client:
        serviceUrl:
          defaultZone: http://localhost:8761/eureka/

\#\#\#6、测试\#\#\#  
依次启动EUREKA、SERVICE-CONFIG、SERVICE-USER-SESSION-REDIS、SERVICE-ZUUL

![这里写图片描述][70]

多次访问网关地址http://localhost:1100/user-session/getUser

1、发现redis中已经有了session的信息

![这里写图片描述][70 1]  
2、session中的信息为redis中获取的，并且是同一个session  
![这里写图片描述][70 2]

总结：springcloud整合redis实现session共享容易发生错误的地方就是经过网关转发会使原session失效，多数人会认为是整合没有成功，仔细看zuul的源码或者直接访问微服务去尝试，不难发现问题的所在。

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![这里写图片描述][70 3]

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![这里写图片描述][70 4]

[70]: https://img-blog.csdn.net/20180619191702128?watermark/2/text/aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3djYmxvZw==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70
[70 1]: https://img-blog.csdn.net/20180619191728217?watermark/2/text/aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3djYmxvZw==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70
[70 2]: https://img-blog.csdn.net/20180619191835605?watermark/2/text/aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3djYmxvZw==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70
[70 3]: https://img-blog.csdn.net/20180619191847663?watermark/2/text/aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3djYmxvZw==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70
[70 4]: https://img-blog.csdn.net/20180619191855309?watermark/2/text/aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3djYmxvZw==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70