using Microsoft.AspNetCore.Http;
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using Microsoft.AspNetCore.Mvc;
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using Microsoft.AspNetCore.Mvc.Filters;
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace zhengcaioa.Models
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{
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public class MyAttribute
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{
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}
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public class CheckLoginAttribute : Attribute, IActionFilter
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{
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public bool IsCheck { get; set; } = true;
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public void OnActionExecuted(ActionExecutedContext context)//方法执行后执行
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{
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}
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public void OnActionExecuting(ActionExecutingContext context)//方法执行前执行
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{
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if (!IsCheck) return;
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if (context.HttpContext.Session.GetString("User") == null)
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{
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// context.Result = new RedirectResult("/Home/Login"); //如果不存在这个Session则表示登陆不成功，跳到Contact页面
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ContentResult Content = new ContentResult();
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Content.Content = GetRestContent("登录过期，请重新登录");
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Content.ContentType = "text/html";
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context.Result = Content;
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}
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else
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{
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//否则，不做操作。
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}
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}
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public static string GetRestContent(string msg)
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{
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StringBuilder jsContent = new StringBuilder();
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jsContent.AppendLine("<script type=\"text/javascript\"> ");
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jsContent.AppendLine(" if (typeof msg !== 'undefined') { ");
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jsContent.AppendLine(" msg.tologin(\"" + msg + "\"); ");
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jsContent.AppendLine(" } else if (typeof parent.msg !== 'undefined') { ");
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jsContent.AppendLine(" parent.msg.tologin(\"" + msg + "\"); ");
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jsContent.AppendLine(" } else { ");
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jsContent.AppendLine(" alert(\"" + msg + "\"); ");
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jsContent.AppendLine(" top.location.href = \"/home/login?m=\" + escape(\"" + msg + "\"); ");
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jsContent.AppendLine(" } ");
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jsContent.AppendLine("</script> ");
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return jsContent.ToString();
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}
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}
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}
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