c# - 似乎全局异常处理程序正在重新抛出 **BadHttpRequestException: Unexpected end of request content** 作为未处理的异常

Question

我的 ASP .NET Core WebAPI 应用程序收到一些无法识别的请求，导致以下错误。

Microsoft.AspNetCore.Server.Kestrel.Core.BadHttpRequestException：请求内容意外结束。

此错误仅记录在 kestrel (stdout_logfile) 中，而不是应用程序的错误日志中。似乎全局异常处理程序正在将异常重新抛出为未处理的异常。

随着请求的不断到来，应用程序变得缓慢并崩溃，最终重新启动主管以启动应用程序。

错误日志：

^[[41m^[[30mfail^[[39m^[[22m^[[49m: Microsoft.AspNetCore.Diagnostics.ExceptionHandlerMiddleware[1]
      An unhandled exception has occurred while executing the request.
Microsoft.AspNetCore.Server.Kestrel.Core.BadHttpRequestException: Unexpected end of request content.
   at Microsoft.AspNetCore.Server.Kestrel.Core.BadHttpRequestException.Throw(RequestRejectionReason reason)
   at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http.Http1ContentLengthMessageBody.ReadAsyncInternal(CancellationToken cancellationToken)
   at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http.HttpRequestStream.ReadAsyncInternal(Memory`1 buffer, CancellationToken cancellationToken)
   at Microsoft.AspNetCore.WebUtilities.FileBufferingReadStream.ReadAsync(Byte[] buffer, Int32 offset, Int32 count, CancellationToken cancellationToken)
   at Microsoft.AspNetCore.WebUtilities.StreamHelperExtensions.DrainAsync(Stream stream, ArrayPool`1 bytePool, Nullable`1 limit, CancellationToken cancellationToken)
   at Microsoft.AspNetCore.Mvc.Formatters.NewtonsoftJsonInputFormatter.ReadRequestBodyAsync(InputFormatterContext context, Encoding encoding)
   at Microsoft.AspNetCore.Mvc.ModelBinding.Binders.BodyModelBinder.BindModelAsync(ModelBindingContext bindingContext)
   at Microsoft.AspNetCore.Mvc.ModelBinding.ParameterBinder.BindModelAsync(ActionContext actionContext, IModelBinder modelBinder, IValueProvider valueProvider, ParameterDescriptor parameter, ModelMetadata metadata, Object value)
   at Microsoft.AspNetCore.Mvc.Controllers.ControllerBinderDelegateProvider.<>c__DisplayClass0_0.<<CreateBinderDelegate>g__Bind|0>d.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeInnerFilterAsync>g__Awaited|13_0(ControllerActionInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeNextResourceFilter>g__Awaited|24_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ResourceExecutedContextSealed context)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.InvokeFilterPipelineAsync()
--- End of stack trace from previous location where exception was thrown ---
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope)
   at Microsoft.AspNetCore.Routing.EndpointMiddleware.<Invoke>g__AwaitRequestTask|6_0(Endpoint endpoint, Task requestTask, ILogger logger)
   at Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context)
   at Microsoft.AspNetCore.Authentication.AuthenticationMiddleware.Invoke(HttpContext context)
   at Microsoft.AspNetCore.Diagnostics.ExceptionHandlerMiddleware.<Invoke>g__Awaited|6_0(ExceptionHandlerMiddleware middleware, HttpContext context, Task task)

代码

异常过滤代码：

public void ConfigureServices(IServiceCollection services)
{
    ...
    ...

    services.AddControllers()
            .ConfigureApiBehaviorOptions(options =>
            {
                options.SuppressConsumesConstraintForFormFileParameters = true;
                options.SuppressInferBindingSourcesForParameters = true;
                options.SuppressModelStateInvalidFilter = true;
                options.SuppressMapClientErrors = true;
                options.ClientErrorMapping[StatusCodes.Status404NotFound].Link =
                    "https://httpstatuses.com/404";

                options.InvalidModelStateResponseFactory = context =>
                {
                    var result = new BadRequestObjectResult(context.ModelState);

                    // TODO: add `using System.Net.Mime;` to resolve MediaTypeNames
                    result.ContentTypes.Add(MediaTypeNames.Application.Json);
                    result.ContentTypes.Add(MediaTypeNames.Application.Xml);

                    return result;
                };
            });

        services.AddControllers(options =>
            options.Filters.Add(new HttpResponseExceptionFilter())
        );
        
    ...
    ...
}

为什么在下面的全局处理程序中没有捕获到错误，或者为什么错误被重新抛出为未处理的异常。我在这里做错了什么？

异常处理代码：

public void OnActionExecuted(ActionExecutedContext context)
{
    if (context.Exception is HttpResponseException exception)
    {
        logger.Error(context.Exception);

        context.Result = new ObjectResult(exception.Value)
        {
            StatusCode = exception.Status,
        };

        context.ExceptionHandled = true;
    }

    else if (context.Exception is BadHttpRequestException badException)
    {
        logger.Error(context.Exception);

        context.Result = new ObjectResult(badException.Data.Values)
        {
            StatusCode = badException.StatusCode,
        };

        context.ExceptionHandled = true;
    }

    else if (context.Exception is Exception otherException)
    {
        logger.Error(context.Exception);

        context.Result = new ObjectResult(otherException.Data.Values)
        {
            StatusCode = otherException.HResult,
        };

        context.ExceptionHandled = true;
    }
}

标签： c#asp.netasp.net-coreerror-handlingasp.net-core-webapi