Ajax 请求session过期的统一处理

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public class LoginInterceptor extends HandlerInterceptorAdapter {
 
    @SuppressWarnings("unused")
    private static final Logger log = Logger.getLogger(LoginInterceptor.class);
     
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
            throws Exception {
//      log.info("URL="+request.getRequestURL().toString());
        Object obj = request.getSession().getAttribute(SecurityConstants.LOGIN_USER);
        if (null == obj) { 
            if (WebUtil.isAjaxRequest(request)){
                response.setHeader("sessionstatus", "timeout"); 
            }else{
                response.sendRedirect(request.getContextPath()+"/usr/login");
            
            return false;
        
        return super.preHandle(request, response, handler);
    }
}

  

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public static boolean isAjaxRequest(HttpServletRequest request){
        boolean result = false;
         
         String headerX = request.getHeader("X-Requested-With");           
            return headerX != null  && headerX.equalsIgnoreCase("XMLHttpRequest");         
         
    }

  

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/**
 * 设置未来(全局)的AJAX请求默认选项
 * 主要设置了AJAX请求遇到Session过期的情况
 */
$.ajaxSetup({
    type: 'POST',
    complete: function(xhr,status) {
        var sessionStatus = xhr.getResponseHeader('sessionstatus');
        if(sessionStatus == 'timeout') {
            var top = getTopWinow();
            var yes = confirm('由于您长时间没有操作, session已过期, 请重新登录.');
            if (yes) {
                top.location.href = '/skynk/index.html';           
            }
        }
    }
});
 
/**
 * 在页面中任何嵌套层次的窗口中获取顶层窗口
 * @return 当前页面的顶层窗口对象
 */
function getTopWinow(){
    var p = window;
    while(p != p.parent){
        p = p.parent;
    }
    return p;
}

  

 

posted @   晨羲  阅读(3432)  评论(0编辑  收藏  举报
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