iot/projects/Infrastructure/Web/DeviceAttribute.cs

using Infrastructure.Extensions;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.Filters;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using System;

namespace Infrastructure.Web
{
    public class DeviceAttribute : ActionFilterAttribute
    {
        public static string DeviceId { get; private set; }

        static DeviceAttribute()
        {
            DeviceId = $"{Helper.Instance.GetCPUNumber()}{Helper.Instance.GetMacAddress()}".Md5();
        }

        public override void OnResultExecuting(ResultExecutingContext context)
        {
            var result = true;
            var message = "";
            var sn = DeviceId;
            try
            {
                var config = context.HttpContext.RequestServices.GetService<IConfiguration>();
                var hashCode = config["code"];
                var code = hashCode.DESDecrypt(sn);
                var values = code.Split('-');
                if (sn != values[0])
                {
                    message = $"授权码不匹配当前设备{sn}";
                    result = false;
                }
                else
                {
                    var timeSeconds = Convert.ToInt64(values[1]);
                    if (timeSeconds != 0)
                    {
                        var endTime = DateTimeOffset.FromUnixTimeSeconds(timeSeconds);
                        if (endTime < DateTimeOffset.UtcNow)
                        {
                            message = $"当前设备{sn}的授权码已过期";
                            result = false;
                        }
                    }
                }
            }
            catch (Exception ex)
            {
                ex.PrintStack();
                message = $"当前设备{sn}的授权码无效";
                result = false;
            }
            if (!result)
            {
                if (context.HttpContext.Request.Headers["X-Requested-With"] == "XMLHttpRequest")
                {
                    context.Result = new JsonResult(new { code = 1, message = message });
                }
                else
                {
                    var queryString = System.Web.HttpUtility.ParseQueryString(string.Empty);
                    queryString["message"] = message;
                    queryString["returnUrl"] = "/Admin/Configuration";
                    var url = $"/Admin/Configuration/RedirectTo?{queryString.ToString()}";
                    context.Result = new RedirectResult(url);
                }
            }
        }

        private string GetCode(string deviceId)
        {
            return DeviceId.Base64UrlEncode().Md5();
        }
    }
}