package com.ots.framework.shiro.web.filter.kickout;
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import com.fasterxml.jackson.databind.ObjectMapper;
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import com.ots.common.constant.ShiroConstants;
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import com.ots.common.utils.ServletUtils;
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import com.ots.common.utils.security.ShiroUtils;
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import com.ots.framework.web.domain.AjaxResult;
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import com.ots.project.system.user.domain.User;
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import org.apache.shiro.cache.Cache;
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import org.apache.shiro.cache.CacheManager;
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import org.apache.shiro.session.Session;
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import org.apache.shiro.session.mgt.DefaultSessionKey;
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import org.apache.shiro.session.mgt.SessionManager;
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import org.apache.shiro.subject.Subject;
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import org.apache.shiro.web.filter.AccessControlFilter;
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import org.apache.shiro.web.util.WebUtils;
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import javax.servlet.ServletRequest;
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import javax.servlet.ServletResponse;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import java.io.IOException;
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import java.io.Serializable;
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import java.util.ArrayDeque;
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import java.util.Deque;
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public class KickoutSessionFilter extends AccessControlFilter {
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private final static ObjectMapper objectMapper = new ObjectMapper();
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private int maxSession = -1;
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private Boolean kickoutAfter = false;
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private String kickoutUrl;
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private SessionManager sessionManager;
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private Cache<String, Deque<Serializable>> cache;
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@Override
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protected boolean isAccessAllowed(ServletRequest servletRequest, ServletResponse servletResponse, Object o)
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throws Exception {
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return false;
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}
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@Override
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protected boolean onAccessDenied(ServletRequest request, ServletResponse response) throws Exception {
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Subject subject = getSubject(request, response);
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if (!subject.isAuthenticated() && !subject.isRemembered() || maxSession == -1) {
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return true;
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}
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try {
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Session session = subject.getSession();
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User user = ShiroUtils.getSysUser();
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String loginName = user.getLoginName();
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Serializable sessionId = session.getId();
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Deque<Serializable> deque = cache.get(loginName);
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if (deque == null) {
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deque = new ArrayDeque<Serializable>();
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}
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if (!deque.contains(sessionId) && session.getAttribute("kickout") == null) {
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deque.push(sessionId);
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cache.put(loginName, deque);
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}
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while (deque.size() > maxSession) {
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Serializable kickoutSessionId = null;
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if (kickoutAfter) {
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kickoutSessionId = deque.removeFirst();
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} else {
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kickoutSessionId = deque.removeLast();
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}
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cache.put(loginName, deque);
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try {
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Session kickoutSession = sessionManager.getSession(new DefaultSessionKey(kickoutSessionId));
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if (null != kickoutSession) {
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kickoutSession.setAttribute("kickout", true);
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}
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} catch (Exception e) {
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}
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}
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if ((Boolean) session.getAttribute("kickout") != null && (Boolean) session.getAttribute("kickout") == true) {
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subject.logout();
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saveRequest(request);
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return isAjaxResponse(request, response);
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}
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return true;
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} catch (Exception e) {
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return isAjaxResponse(request, response);
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}
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}
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private boolean isAjaxResponse(ServletRequest request, ServletResponse response) throws IOException {
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HttpServletRequest req = (HttpServletRequest) request;
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HttpServletResponse res = (HttpServletResponse) response;
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if (ServletUtils.isAjaxRequest(req)) {
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AjaxResult ajaxResult = AjaxResult.error("您已在别处登录，请您修改密码或重新登录");
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ServletUtils.renderString(res, objectMapper.writeValueAsString(ajaxResult));
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} else {
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WebUtils.issueRedirect(request, response, kickoutUrl);
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}
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return false;
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}
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public void setMaxSession(int maxSession) {
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this.maxSession = maxSession;
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}
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public void setKickoutAfter(boolean kickoutAfter) {
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this.kickoutAfter = kickoutAfter;
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}
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public void setKickoutUrl(String kickoutUrl) {
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this.kickoutUrl = kickoutUrl;
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}
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public void setSessionManager(SessionManager sessionManager) {
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this.sessionManager = sessionManager;
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}
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public void setCacheManager(CacheManager cacheManager) {
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this.cache = cacheManager.getCache(ShiroConstants.SYS_USERCACHE);
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}
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}
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