Ajax
AJAX即“Asynchronous Javascript + XML”(异步JavaScript和XML),是指一种创建交互式网页应用的网页开发技术。
在Filter里判断是否登录,如果未登录返回401状态
public class SelfOnlyAttribute : ActionFilterAttribute
{
public override void OnActionExecuting(ActionExecutingContext filterContext)
{
HttpResponseBase response = filterContext.HttpContext.Response;
HttpRequestBase request = filterContext.HttpContext.Request;
if (filterContext.HttpContext.User.Identity.IsAuthenticated)
{
//已经登录代码
}
else
{
if (!request.IsAjaxRequest())
{
string str = request.Url.AbsoluteUri.ToLower();
string str2 = "/login";
filterContext.Result = new RedirectResult(string.Format("{0}?returnUrl={1}", str2, str));
}
else
{
response.SetStatus(401);
}
filterContext.Result = new HttpUnauthorizedResult(); //这一行保证不再执行Action的代码
response.End(); //必须加上这句,否则返回前台status始终是200
return;
}
}
}
在全局js添加错误处理代码
$("div").ajaxError(function(e,xhr,opt){
alert(xhr.status+ " " + xhr.statusText);
if(xhr.status=401){
//TODO 未登录 跳转到登录页
window.location.href = ‘/login‘;
}
});