filter 拦截ajax请求
发布时间:2020-12-15 21:30:19 所属栏目:百科 来源:网络整理
导读:filter: /** * 拦截器示例 */public class SessonFilter implements Filter { private static Logger log = LoggerFactory.getLogger(SessonFilter.class); @Override public void init(FilterConfig filterConfig) throws ServletException { //empty impl
filter: /** * 拦截器示例 */ public class SessonFilter implements Filter { private static Logger log = LoggerFactory.getLogger(SessonFilter.class); @Override public void init(FilterConfig filterConfig) throws ServletException { //empty implement } @Override public void doFilter(ServletRequest request,ServletResponse response,FilterChain chain) throws IOException,ServletException { HttpServletRequest httpRequest = (HttpServletRequest) request; HttpServletResponse httpResponse = (HttpServletResponse) response; HttpSession session = httpRequest.getSession(); String uri = httpRequest.getRequestURI(); String ctxpath = httpRequest.getContextPath(); String userid = (String)session.getAttribute("userid"); if(uri.contains("/user/login") || uri.contains("/user/regPage") ){ chain.doFilter(request,response); }else{ if(userid == null){ String contextPath = httpRequest.getContextPath(); String redirect = contextPath ; //ajax session 过期处理 //1:判断是否是ajax请求 if (httpRequest.getHeader("x-requested-with") != null && "XMLHttpRequest".equalsIgnoreCase(httpRequest.getHeader("x-requested-with"))) { //向http头添加 状态 sessionstatus httpResponse.setHeader("sessionstatus","timeout"); httpResponse.setStatus(403); //向http头添加登录的url httpResponse.addHeader("loginPath",ctxpath); chain.doFilter(request,response); log.debug("ajax request"); return ; } httpResponse.sendRedirect(redirect); return; }else{ chain.doFilter(request,response); } } } @Override public void destroy() { //empty implement } } js //ajax完成时回调函数 $(document).ajaxComplete(function(event,xhr,settings) { //从http头信息取出 在filter定义的sessionstatus,判断是否是 timeout if(xhr.getResponseHeader("sessionstatus")=="timeout"){ //从http头信息取出登录的url = loginPath if(xhr.getResponseHeader("loginPath")){ alert("会话过期,请重新登陆!"); //打会到登录页面 window.location.replace(xhr.getResponseHeader("loginPath")); }else{ alert("请求超时请重新登陆 !"); } } }); 备注: ajaxComplete() 方法在 AJAX 请求完成时执行函数。它是一个 Ajax 事件。 与 ajaxSuccess() 不同,通过 ajaxComplete() 方法规定的函数会在请求完成时运行,即使请求并未成功。 (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |