MVC 登陆鉴权

        public ActionResult Login(string data)
        {
            var _params = JsonConvert.DeserializeAnonymousType(data, new { userName = "", password = "" });
            string userIdMd5 = _params.userName.Md5Sign();//查询UserId,需加密
            string token = Guid.NewGuid().ToString();//token,用于加密
            if (RedisHelper.Get(userIdMd5) == null)//写入缓存
            {
                RedisHelper.Set(userIdMd5, new { token, _params.userName, _params.password }, TimeSpan.FromMinutes());
            }
            else
            {
                token = JsonConvert.DeserializeAnonymousType(RedisHelper.Get(userIdMd5), new { token }).token;
            }
            Response.Cookies.Add(new HttpCookie("userIdMd5", userIdMd5));
            return Json(new { token });//返回Token
        }

using cpf360.Common;
using cpf360.DTO;
using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Web;
using System.Web.Mvc;

namespace HanLiPrj.Filter
{
    public class NeedLoginAttribute : AuthorizeAttribute
    {
        protected override bool AuthorizeCore(HttpContextBase httpContext)
        {
            if (!httpContext.Request.Cookies.AllKeys.Contains("userIdMd5") || RedisHelper.Get(httpContext.Request.Cookies["userIdMd5"].Value) == null)
            {
                httpContext.Response.Write(JsonConvert.SerializeObject(new OutputData { code=, message = "请登录" }));
                return false;
            }

            string userInfo = RedisHelper.Get(httpContext.Request.Cookies["userIdMd5"].Value);
            string token = JsonConvert.DeserializeAnonymousType(userInfo, new { token = "" }).token;
            if (!httpContext.Request.QueryString.AllKeys.Contains("sign") || !httpContext.Request.QueryString.AllKeys.Contains("timespan"))
            {
                httpContext.Response.Write(JsonConvert.SerializeObject(new OutputData { code = , message = "请加权" }));
                return false;
            }
            if ((DateTime.Now - httpContext.Request.QueryString["timespan"].ToDateTime()).TotalSeconds > )
            {
                httpContext.Response.Write(JsonConvert.SerializeObject(new OutputData { code = , message = "请求超时" }));
                return false;
            }
            string method = httpContext.Request.HttpMethod;
            string data = "";
            if (method == "GET")
            {
                IDictionary<string, string> parameters = new Dictionary<string, string>();
                for (int f = ; f < httpContext.Request.QueryString.AllKeys.Count(); f++)
                {
                    string key = httpContext.Request.QueryString.AllKeys[f];
                    if (key == "sign") continue;
                    parameters.Add(key, httpContext.Request.QueryString[key]);
                }

                // 第二步：把字典按Key的字母顺序排序
                IDictionary<string, string> sortedParams = new SortedDictionary<string, string>(parameters);
                IEnumerator<KeyValuePair<string, string>> dem = sortedParams.GetEnumerator();

                // 第三步：把所有参数名和参数值串在一起
                StringBuilder query = new StringBuilder();
                while (dem.MoveNext())
                {
                    string key = dem.Current.Key;
                    string value = dem.Current.Value;
                    if (!string.IsNullOrEmpty(key))
                    {
                        query.Append(key).Append(value);
                    }
                }
                data = query.ToString();
            }
            else if (method == "POST")
            {
                data = httpContext.Request.Form["data"] + httpContext.Request.QueryString["timespan"];
            }
            var md5String = (data + token).Md5Sign();
            if (md5String != httpContext.Request.QueryString["sign"])
            {
                httpContext.Response.Write(JsonConvert.SerializeObject(new OutputData { code = , message = "请加权" }));
                return false;
            }

            RedisHelper.Remove(httpContext.Request.Cookies["userIdMd5"].Value);//清除缓存
            RedisHelper.Set(httpContext.Request.Cookies["userIdMd5"].Value, userInfo, TimeSpan.FromMinutes());//延长缓存时间
            return true;
        }
    }
}