public void ProcessRequest(HttpContext context)
        {
            if (context.Request.Url.AbsolutePath.ToLower().IndexOf(".aspx") > -1)
            {
                string myPage = context.Request.Url.Segments[context.Request.Url.Segments.Length - 1].ToLower();
                if (myPage.ToLower() != Common.DefaltPage.ToLower() && Common.SessionUserData == null)
                {
                    context.Response.Write("<script type=\"text/javascript\">alert(\"连接超时,请重新登陆或非正常登陆!\");</script>");
                    context.Response.Write("<script type=\"text/javascript\">top.location.href='http://" + context.Request.Url.Authority + context.Request.ApplicationPath + Common.DefaltPage + "';</script>");
                    context.Response.End();
                }
                else
                {
                    context.Response.Redirect(context.Request.RawUrl, true);    //死循环。。。老跑进httphandler里面来


                    //这个方法可以通过，但是不支持.aspx?xxx的格式，不允许?xxxx格式
                    //IHttpHandler handle = PageParser.GetCompiledPageInstance(context.Request.RawUrl, context.Request.PhysicalPath, context);
                    //context.Server.Transfer(handle, true);
                }
            }
        }