1.前言

当决定前端与后端代码分开部署时，发现shiro自带的session不起作用了。

然后通过对请求head的分析，然后在网上查找一部分解决方案。

最终就是，登录成功之后，前端接收到后端传回来的sessionId，存入cookie当中。

之后，前端向后端发送请求时，请求Head中都会带上这个sessionid。

后端代码通过对这个sessionid的解析，拿到正确的session。

2.代码改造

（1）后端代码改造

1. 添加CustomSessionManager.java

   /**
    * 类的详细说明
    *
    * @author 郭广明
    * @version 1.0
    * @Date 2018/11/3014:56
    */
   public class CustomSessionManager extends DefaultWebSessionManager {
   
       /**
        * 获取请求头中key为“Authorization”的value == sessionId
        */
       private static final String AUTHORIZATION ="Authorization";
   
       private static final String REFERENCED_SESSION_ID_SOURCE = "cookie";
   
       /**
        *  @Description shiro框架 自定义session获取方式<br/>
        *  可自定义session获取规则。这里采用ajax请求头 {@link AUTHORIZATION}携带sessionId的方式
        */
       @Override
       protected Serializable getSessionId(ServletRequest request, ServletResponse response) {
           // TODO Auto-generated method stub
           String sessionId = WebUtils.toHttp(request).getHeader(AUTHORIZATION);
           if (StringUtils.isNotEmpty(sessionId)) {
               request.setAttribute(ShiroHttpServletRequest.REFERENCED_SESSION_ID_SOURCE, ShiroHttpServletRequest.COOKIE_SESSION_ID_SOURCE);
               request.setAttribute(ShiroHttpServletRequest.REFERENCED_SESSION_ID, sessionId);
               request.setAttribute(ShiroHttpServletRequest.REFERENCED_SESSION_ID_IS_VALID, Boolean.TRUE);
               return sessionId;
           }
           return super.getSessionId(request, response);
       }
   
   }
   

2. 改造ShiroConfig.java

   @Configuration
   public class ShiroConfig {
   
       @Autowired
       private UserService userService;
   
       @Bean
       public ShiroFilterFactoryBean shirFilter(SecurityManager securityManager) {
           ShiroFilterFactoryBean shiroFilterFactoryBean = new ShiroFilterFactoryBean();
   
           // 必须设置 SecurityManager
           shiroFilterFactoryBean.setSecurityManager(securityManager);
   
           // 如果不设置默认会自动寻找Web工程根目录下的"/login.jsp"页面
           shiroFilterFactoryBean.setLoginUrl("/login");
   
           // 拦截器.
           Map<String, String> filterChainDefinitionMap = new LinkedHashMap<String, String>();
           // 配置不会被拦截的链接 顺序判断
           filterChainDefinitionMap.put("/static/**", "anon");
           filterChainDefinitionMap.put("/doLogin", "anon");
           filterChainDefinitionMap.put("/swagger-resources", "anon");
           filterChainDefinitionMap.put("/v2/api-docs", "anon");
           filterChainDefinitionMap.put("/webjars/**", "anon");
           filterChainDefinitionMap.put("/swagger-ui.html", "anon");
   
           // <!-- 过滤链定义，从上向下顺序执行，一般将 /**放在最为下边 -->:这是一个坑呢，一不小心代码就不好使了;
           // <!-- authc:所有url都必须认证通过才可以访问; anon:所有url都都可以匿名访问-->
           filterChainDefinitionMap.put("/**", "anon");
   
           shiroFilterFactoryBean.setFilterChainDefinitionMap(filterChainDefinitionMap);
           System.out.println("Shiro拦截器工厂类注入成功");
           return shiroFilterFactoryBean;
       }
   
       /**
        * 注入MyRealm
        * @return
        */
       @Bean
       public SecurityManager securityManager() {
           DefaultWebSecurityManager securityManager = new DefaultWebSecurityManager();
           // 设置realm.
           securityManager.setSessionManager(sessionManager());
           securityManager.setRealm(myShiroRealm());
           return securityManager;
       }
   
       /**
        * 配置注解
        * @param securityManager
        * @return
        */
       @Bean
       public AuthorizationAttributeSourceAdvisor authorizationAttributeSourceAdvisor(SecurityManager securityManager) {
           AuthorizationAttributeSourceAdvisor authorizationAttributeSourceAdvisor
                   = new AuthorizationAttributeSourceAdvisor();
           authorizationAttributeSourceAdvisor.setSecurityManager(securityManager);
           return authorizationAttributeSourceAdvisor;
       }
   
       @Bean
       public MyRealm myShiroRealm() {
           return new MyRealm(userService);
       }
   
       @Bean("sessionManager")
       public SessionManager sessionManager(){
           CustomSessionManager manager = new CustomSessionManager();
           /*使用了shiro自带缓存，
           如果设置 redis为缓存需要重写CacheManager（其中需要重写Cache）
           manager.setCacheManager(this.RedisCacheManager());*/
   
           manager.setSessionDAO(new EnterpriseCacheSessionDAO());
           return manager;
       }
   
   }
   

（2）前端代码改造

1. 添加CookieUtil.js

   export default {
       setCookie: (name,value,days) =>{
           var d = new Date;
           d.setTime(d.getTime() + 24*60*60*1000*days);
           window.document.cookie = name + "=" + value + ";path=/;expires=" + d.toGMTString();
       },
       getCookie: name =>{
           var v = window.document.cookie.match('(^|;) ?' + name + '=([^;]*)(;|$)');
           return v ? v[2] : null;
       },
       delCookie: name =>{
           this.setCookie(name, '', -1); //将时间设置为过去时，立即删除cookie
       }
   
   }
   

2. 改造HttpUtil.js

   import axios from 'axios'
   import doCookie from '@/util/cookieUtil'
   
   axios.defaults.headers.common['Authorization'] = doCookie.getCookie("SESSIONID")
   axios.defaults.baseURL = 'http://127.0.0.1:8080'
   
   
   /**
    * Get请求
    */
   export function get(url, callback){
       axios.get(url)
       .then(function (response) {
           if(response.data.length==0 || response.data==null) {
               callback(null,true)
           } else {
               callback(response.data,true)
           }
       })
       .catch(function (error) {
           callback(null,false)
       })
   }
   
   export function remove(url, callback){
       axios.delete(url)
       .then(function (response) {
           if(response.data.length==0 || response.data==null) {
               callback(null,true)
           } else {
               callback(response.data,true)
           }
       })
       .catch(function (error) {
           callback(null,false)
       })
   }
   
   export function post(url, data, callback){
       axios.post(url,data)
       .then(function (response) {
           if(response.data.length==0 || response.data==null) {
               callback(null,true)
           } else {
               callback(response.data,true)
           }
       })
       .catch(function (error) {
           callback(null,false)
       })
   }
   
   export function put(url, data, callback){
       axios.put(url,data)
       .then(function (response) {
           if(response.data.length==0 || response.data==null) {
               callback(null,true)
           } else {
               callback(response.data,true)
           }
       })
       .catch(function (error) {
           callback(null,false)
       })
   }
   
   
   export default {
       get,
       post,
       put,
       remove,
   }