.net core简单引用abp vnext异常过滤

1. abp在AbpAspNetCoreMvcModule里添加AbpExceptionFilter过滤器的，异常管理主要通过AbpExceptionFilter实现
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   public class AbpAspNetCoreMvcModule : AbpModule     {         //......省略若干代码             Configure<MvcOptions>(mvcOptions =>             {                 mvcOptions.AddAbp(context.Services);             });        //......     }

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   public static void AddAbp(this MvcOptions options, IServiceCollection services) {     //...     AddActionFilters(options);     //... }

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   private static void AddActionFilters(MvcOptions options)         {             // ...             // 异常过滤器             options.Filters.AddService(typeof(AbpExceptionFilter));         }

2. AbpExceptionFilter过滤器在AbpAspNetCoreMvcModule里添加的，可以直接用，也可以自己添加过滤器重写AbpExceptionFilter自定义Exception类型与返回result
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   public class MyExceptionFilter : AbpExceptionFilter, ITransientDependency     {         public MyExceptionFilter(IExceptionToErrorInfoConverter errorInfoConverter, IHttpExceptionStatusCodeFinder statusCodeFinder, Volo.Abp.Json.IJsonSerializer jsonSerializer, IOptions<AbpExceptionHandlingOptions> exceptionHandlingOptions) : base(errorInfoConverter, statusCodeFinder, jsonSerializer, exceptionHandlingOptions)         {         }           /// <summary>         /// 是否需要进入异常处理         /// </summary>         /// <param name="context"></param>         /// <returns></returns>         protected override bool ShouldHandleException(ExceptionContext context)         {             //TODO: Create DontWrap attribute to control wrapping..?               if (context.ActionDescriptor.IsControllerAction() &&                 context.ActionDescriptor.HasObjectResult())             {                 return true;             }               if (context.HttpContext.Request.CanAccept(MimeTypes.Application.Json))             {                 return true;             }               if (context.HttpContext.Request.IsAjax())             {                 return true;             }               return false;         }           /// <summary>         /// 异常处理         /// </summary>         /// <param name="context"></param>         /// <returns></returns>         protected override async Task HandleAndWrapException(ExceptionContext context)         {             //TODO: Trigger an AbpExceptionHandled event or something like that.             //定义Headers             context.HttpContext.Response.Headers.Add(AbpHttpConsts.AbpErrorFormat, "true");               //定义状态码   可以新增Exception类型，重写IHttpExceptionStatusCodeFinder获取返回StatusCode             context.HttpContext.Response.StatusCode = (int)context                 .HttpContext.RequestServices.GetRequiredService<IHttpExceptionStatusCodeFinder>()                 .GetStatusCode(context.HttpContext, context.Exception);               //获取返回result对象，可以重写自定义返回result             var exceptionHandlingOptions = context.HttpContext.RequestServices.GetRequiredService<IOptions<AbpExceptionHandlingOptions>>().Value;             var exceptionToErrorInfoConverter = context.HttpContext.RequestServices.GetRequiredService<IExceptionToErrorInfoConverter>();             var remoteServiceErrorInfo = exceptionToErrorInfoConverter.Convert(context.Exception, exceptionHandlingOptions.SendExceptionsDetailsToClients);             context.Result = new ObjectResult(new RemoteServiceErrorResponse(remoteServiceErrorInfo));               //打印日志             var logLevel = context.Exception.GetLogLevel();             var remoteServiceErrorInfoBuilder = new StringBuilder();             remoteServiceErrorInfoBuilder.AppendLine($"---------- {nameof(RemoteServiceErrorInfo)} ----------");             //remoteServiceErrorInfoBuilder.AppendLine(remoteServiceErrorInfo);               var logger = context.HttpContext.RequestServices.GetService<ILogger<AbpExceptionFilter>>();               logger.LogWithLevel(logLevel, remoteServiceErrorInfoBuilder.ToString());               logger.LogException(context.Exception, logLevel);               //await context.HttpContext.RequestServices.GetRequiredService<IExceptionNotifier>().NotifyAsync(new ExceptionNotificationContext(context.Exception));               context.Exception = null; //Handled!         }     }

   　　

3. 可以按BusinessException格式新增异常类型
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   [Serializable]     public class BusinessException : Exception,         IBusinessException,         IHasErrorCode,         IHasErrorDetails,         IHasLogLevel     {         public string Code { get; set; }           public string Details { get; set; }           public LogLevel LogLevel { get; set; }           public BusinessException(             string code = null,             string message = null,             string details = null,             Exception innerException = null,             LogLevel logLevel = LogLevel.Warning)             : base(message, innerException)         {             Code = code;             Details = details;             LogLevel = logLevel;         }           /// <summary>         /// Constructor for serializing.         /// </summary>         public BusinessException(SerializationInfo serializationInfo, StreamingContext context)             : base(serializationInfo, context)         {           }           public BusinessException WithData(string name, object value)         {             Data[name] = value;             return this;         }     }

   　　

4. 重写IHttpExceptionStatusCodeFinder接口定义返回StatusCode
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   public virtual HttpStatusCode GetStatusCode(HttpContext httpContext, Exception exception)         {             if (exception is IHasHttpStatusCode exceptionWithHttpStatusCode &&                 exceptionWithHttpStatusCode.HttpStatusCode > 0)             {                 return (HttpStatusCode) exceptionWithHttpStatusCode.HttpStatusCode;             }               if (exception is IHasErrorCode exceptionWithErrorCode &&                 !exceptionWithErrorCode.Code.IsNullOrWhiteSpace())             {                 if (Options.ErrorCodeToHttpStatusCodeMappings.TryGetValue(exceptionWithErrorCode.Code, out var status))                 {                     return status;                 }             }               if (exception is AbpAuthorizationException)             {                 return httpContext.User.Identity.IsAuthenticated                     ? HttpStatusCode.Forbidden                     : HttpStatusCode.Unauthorized;             }               //TODO: Handle SecurityException..?               if (exception is AbpValidationException)             {                 return HttpStatusCode.BadRequest;             }               if (exception is EntityNotFoundException)             {                 return HttpStatusCode.NotFound;             }               if (exception is NotImplementedException)             {                 return HttpStatusCode.NotImplemented;             }               if (exception is IBusinessException)             {                 return HttpStatusCode.Forbidden;             }               return HttpStatusCode.InternalServerError;         }

   　　

5. 重写IExceptionToErrorInfoConverter接口定义返回result　
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   public class DefaultExceptionToErrorInfoConverter : IExceptionToErrorInfoConverter, ITransientDependency     {         ///....         public RemoteServiceErrorInfo Convert(Exception exception, bool includeSensitiveDetails)         {             var errorInfo = CreateErrorInfoWithoutCode(exception, includeSensitiveDetails);               if (exception is IHasErrorCode hasErrorCodeException)             {                 errorInfo.Code = hasErrorCodeException.Code;             }               return errorInfo;         }     }