IdempotentAttribute.cs 3.6 KB

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  1. // Admin.NET 项目的版权、商标、专利和其他相关权利均受相应法律法规的保护。使用本项目应遵守相关法律法规和许可证的要求。
  2. //
  3. // 本项目主要遵循 MIT 许可证和 Apache 许可证(版本 2.0)进行分发和使用。许可证位于源代码树根目录中的 LICENSE-MIT 和 LICENSE-APACHE 文件。
  4. //
  5. // 不得利用本项目从事危害国家安全、扰乱社会秩序、侵犯他人合法权益等法律法规禁止的活动!任何基于本项目二次开发而产生的一切法律纠纷和责任,我们不承担任何责任!
  6. using System.Security.Claims;
  7. namespace Admin.NET.Core;
  8. /// <summary>
  9. /// 防止重复请求过滤器特性
  10. /// </summary>
  11. [SuppressSniffer]
  12. [AttributeUsage(AttributeTargets.All, AllowMultiple = true, Inherited = true)]
  13. public class IdempotentAttribute : Attribute, IAsyncActionFilter
  14. {
  15. /// <summary>
  16. /// 请求间隔时间/秒
  17. /// </summary>
  18. public int IntervalTime { get; set; } = 5;
  19. /// <summary>
  20. /// 错误提示内容
  21. /// </summary>
  22. public string Message { get; set; } = "你操作频率过快,请稍后重试!";
  23. /// <summary>
  24. /// 缓存前缀: Key+请求路由+用户Id+请求参数
  25. /// </summary>
  26. public string CacheKey { get; set; }
  27. /// <summary>
  28. /// 是否直接抛出异常:Ture是,False返回上次请求结果
  29. /// </summary>
  30. public bool ThrowBah { get; set; }
  31. public IdempotentAttribute()
  32. {
  33. }
  34. public async Task OnActionExecutionAsync(ActionExecutingContext context, ActionExecutionDelegate next)
  35. {
  36. var httpContext = context.HttpContext;
  37. var path = httpContext.Request.Path.Value.ToString();
  38. var userId = httpContext.User?.FindFirstValue(ClaimConst.UserId);
  39. var cacheExpireTime = TimeSpan.FromSeconds(IntervalTime);
  40. var parameters = "";
  41. foreach (var parameter in context.ActionDescriptor.Parameters)
  42. {
  43. parameters += parameter.Name;
  44. parameters += context.ActionArguments[parameter.Name].ToJson();
  45. }
  46. var cacheKey = MD5Encryption.Encrypt($"{CacheKey}{path}{userId}{parameters}");
  47. var sysCacheService = App.GetRequiredService<SysCacheService>();
  48. if (sysCacheService.ExistKey(cacheKey))
  49. {
  50. if (ThrowBah) throw Oops.Oh(Message);
  51. try
  52. {
  53. var cachedResult = sysCacheService.Get<ResponseData>(cacheKey);
  54. context.Result = new ObjectResult(cachedResult.Value);
  55. }
  56. catch (Exception ex)
  57. {
  58. throw Oops.Oh($"{Message}-{ex}");
  59. }
  60. }
  61. else
  62. {
  63. // 先加入一个空缓存,防止第一次请求结果没回来导致连续请求
  64. sysCacheService.Set(cacheKey, "", cacheExpireTime);
  65. var resultContext = await next();
  66. if (resultContext.Result is ObjectResult objectResult)
  67. {
  68. var valueType = objectResult.Value.GetType();
  69. var responseData = new ResponseData
  70. {
  71. Type = valueType.Name,
  72. Value = objectResult.Value
  73. };
  74. sysCacheService.Set(cacheKey, responseData, cacheExpireTime);
  75. }
  76. }
  77. }
  78. /// <summary>
  79. /// 请求结果数据
  80. /// </summary>
  81. private class ResponseData
  82. {
  83. /// <summary>
  84. /// 结果类型
  85. /// </summary>
  86. public string Type { get; set; }
  87. /// <summary>
  88. /// 请求结果
  89. /// </summary>
  90. public dynamic Value { get; set; }
  91. }
  92. }