ajax异步请求,session失效处理
后台拦截器代码:
// 判断是否是AJAX请求 if (isAjaxRequest(request)) { log.info("AjaxRequest请求"); ActionContext ac = arg0.getInvocationContext(); HttpServletResponse response = (HttpServletResponse)ac.get(StrutsStatics.HTTP_RESPONSE); response.setHeader("sessionstatus", "timeout");//返回前台的标志 //response.sendError(518, "session timeout.");//5**,表示服务器错误
return null; } /** * 判断是否是ajax请求 * @param request * @return */ private boolean isAjaxRequest(HttpServletRequest request) { String header = request.getHeader("X-Requested-With"); if (header != null && "XMLHttpRequest".equals(header)) { return true; } else { return false; } }
/**
* =============js代码===================================
* 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
*/
var flag = true;//防止重复点击 var domain = document.domain; var ip = /^(\d+)\.(\d+)\.(\d+)\.(\d+)$/; var path = (ip.test(domain))?("http://"+domain+":8081/WSS"):("http://"+document.domain); console.log(path); $.ajaxSetup({ type: 'POST', complete: function(xhr,status) { var sessionStatus = xhr.getResponseHeader('sessionstatus'); if(sessionStatus == 'timeout' && flag ) { flag = false; var top = getTopWinow(); $.TipsBox.Alert("由于您长时间没有操作, session已过期, 请重新登录","error","",function(){ //成功回调 flag = true; top.location.href = path+"/sys/login.htm"; }); } } }); /** * 在页面中任何嵌套层次的窗口中获取顶层窗口 * @return 当前页面的顶层窗口对象 */ function getTopWinow(){ var p = window; while(p != p.parent){ p = p.parent; } return p; }
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$.ajaxSetup详解,参数另见 ‘$.ajax’
![](https://images2018.cnblogs.com/blog/653177/201802/653177-20180228091124297-2116425956.png)