shiro同一用户后登陆踢出前面的用户
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2022-07-14 19:58:31
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直接上代码
下面就是我实现的访问控制拦截器:KickoutSessionControlFilter:
public class KickoutSessionControlFilter extends AccessControlFilter {
private static Logger logger = LoggerFactory.getLogger(KickoutSessionControlFilter.class);
private String kickoutUrl; //踢出后到的地址
private boolean kickoutAfter = false; //踢出之前登录的/之后登录的用户 默认踢出之前登录的用户
private int maxSession = 1; //同一个帐号最大会话数 默认1
private SessionManager sessionManager;
private Cache<String, Deque<Serializable>> cache;
public void setKickoutUrl(String kickoutUrl) {
this.kickoutUrl = kickoutUrl;
}
public void setKickoutAfter(boolean kickoutAfter) {
this.kickoutAfter = kickoutAfter;
}
public void setMaxSession(int maxSession) {
this.maxSession = maxSession;
}
public void setSessionManager(SessionManager sessionManager) {
this.sessionManager = sessionManager;
}
public void setCacheManager(CacheManager cacheManager) {
this.cache = cacheManager.getCache("shiro-kickout-session");
}
@Override
protected boolean isAccessAllowed(ServletRequest request, ServletResponse response, Object mappedValue) throws Exception {
return false;
}
@Override
protected boolean onAccessDenied(ServletRequest request, ServletResponse response) throws Exception {
Subject subject = getSubject(request, response);
if(!subject.isAuthenticated() && !subject.isRemembered()) {
//如果没有登录,直接进行之后的流程
return true;
}
Session session = subject.getSession();
ShiroUser user = (ShiroUser) subject.getPrincipal();
String username = user.getUserName();
Serializable sessionId = session.getId();
//读取缓存 没有就存入
Deque<Serializable> deque = cache.get(username);
if(deque == null) {
deque = new LinkedList<Serializable>();
cache.put(username, deque);
}
//如果队列里没有此sessionId,且用户没有被踢出;放入队列
if(!deque.contains(sessionId) && session.getAttribute("kickout") == null) {
deque.push(sessionId);
}
//如果队列里的sessionId数超出最大会话数,开始踢人
while(deque.size() > maxSession) {
Serializable kickoutSessionId = null;
if(kickoutAfter) { //如果踢出后者
kickoutSessionId = deque.removeFirst();
} else { //否则踢出前者
kickoutSessionId = deque.removeLast();
}
try {
Session kickoutSession = sessionManager.getSession(new DefaultSessionKey(kickoutSessionId));
if(kickoutSession != null) {
//设置会话的kickout属性表示踢出了
kickoutSession.setAttribute("kickout", true);
}
} catch (Exception e) {//ignore exception
e.printStackTrace();
}
}
//如果被踢出了,直接退出,重定向到踢出后的地址
if (session.getAttribute("kickout") != null) {
//会话被踢出了
try {
subject.logout();
} catch (Exception e) { //ignore
}
saveRequest(request);
HttpServletRequest httpRequest = WebUtils.toHttp(request);
if (com.frame.utils.WebUtils.isAjax(httpRequest)) {
logger.debug("当前用户已经在其他地方登录,并且是Ajax请求!");
HttpServletResponse httpServletResponse = WebUtils.toHttp(response);
// 向http头添加 状态 sessionstatus
httpServletResponse.setHeader("sessionstatus", "kickout");
// 向http头添加登录的url
httpServletResponse.addHeader("loginPath", kickoutUrl);
// httpServletResponse.sendError(ShiroFilterUtils.HTTP_STATUS_SESSION_EXPIRE);
return false;
} else {
request.setAttribute("user_status", "300");
request.setAttribute("message", "您已经在其他地方登录,请重新登录!");
request.getRequestDispatcher(kickoutUrl).forward(request, response);
return false;
}
}
return true;
}
}
如果是springMVC+shiro就将这个自定义的拦截器配置在shiro.xml文件中:
<bean id="kickoutSessionControlFilter" class="com.platform.shiro.KickoutSessionControlFilter">
<property name="cacheManager" ref="shiroEhcacheManager" />
<property name="sessionManager" ref="sessionManager" />
<!-- 是否踢出后来登录的,默认是false;即后者登录的用户踢出前者登录的用户 -->
<property name="kickoutAfter" value="false" />
<!-- 同一个用户最大的会话数,默认1;比如2的意思是同一个用户允许最多同时两个人登录 -->
<property name="maxSession" value="1" />
<property name="kickoutUrl" value="/login" />
</bean>
是springboot+shiro拦截器配置在ShiroConfig.java文件中:
/**
* 限制同一账号登录同时登录人数控制
* @return
*/
public KickoutSessionControlFilter kickoutSessionControlFilter(){
KickoutSessionControlFilter kickoutSessionControlFilter = new KickoutSessionControlFilter();
//使用cacheManager获取相应的cache来缓存用户登录的会话;用于保存用户—会话之间的关系的;
//这里我们还是用之前shiro使用的redisManager()实现的cacheManager()缓存管理
//也可以重新另写一个,重新配置缓存时间之类的自定义缓存属性
kickoutSessionControlFilter.setCacheManager(cacheManager());
//用于根据会话ID,获取会话进行踢出操作的;
kickoutSessionControlFilter.setSessionManager(sessionManager());
//是否踢出后来登录的,默认是false;即后者登录的用户踢出前者登录的用户;踢出顺序。
kickoutSessionControlFilter.setKickoutAfter(false);
//同一个用户最大的会话数,默认1;比如2的意思是同一个用户允许最多同时两个人登录;
kickoutSessionControlFilter.setMaxSession(1);
//被踢出后重定向到的地址;
kickoutSessionControlFilter.setKickoutUrl("/kickout");
return kickoutSessionControlFilter;
}
在将这个kickoutSessionControlFilter()注入到shiroFilterFactoryBean中:
//自定义拦截器
Map<String, Filter> filtersMap = new LinkedHashMap<String, Filter>();
//限制同一帐号同时在线的个数。
filtersMap.put("kickout", kickoutSessionControlFilter());
shiroFilterFactoryBean.setFilters(filtersMap);
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