c# - 请求内容意外结束 Kestrel ASP.NET Core

Question

我在两个 WebApi 之间发送大(20GB)文件时遇到问题。

用 ASP.NET 4.6 编写的 WebAPI1

用 ASP.NET Core 2.0 编写的 WebAPI2

当我通过 Postman 将此文件发送到 WebAPI2 时，将发送整个文件。但是当我尝试将文件从 WebAPI1 发送到 WebAPI2 时它失败了(尽管我可以发送 7GB 之类的文件)。

在发送 20GB 文件期间，我在 WebAPI2 中收到错误:

Microsoft.AspNetCore.Server.Kestrel.Core.BadHttpRequestException: Unexpected
 end of request content.
   at Microsoft.AspNetCore.Server.Kestrel.Internal.System.IO.Pipelines.PipeCompl
etion.ThrowFailed()
   at Microsoft.AspNetCore.Server.Kestrel.Internal.System.IO.Pipelines.Pipe.GetR
esult(ReadResult& result)
   at Microsoft.AspNetCore.Server.Kestrel.Internal.System.IO.Pipelines.Pipe.Micr
osoft.AspNetCore.Server.Kestrel.Internal.System.IO.Pipelines.IReadableBufferAwai
ter.GetResult()
   at Microsoft.AspNetCore.Server.Kestrel.Internal.System.IO.Pipelines.ReadableB
ufferAwaitable.GetResult()
   at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http.MessageBody.<ReadAs
ync>d__22.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNot
ification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
   at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http.FrameRequestStream.
<ReadAsyncInternal>d__21.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNot
ification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
   at Microsoft.AspNetCore.WebUtilities.BufferedReadStream.<EnsureBufferedAsync>
d__37.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNot
ification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
   at Microsoft.AspNetCore.WebUtilities.MultipartReaderStream.<ReadAsync>d__36.M
oveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNot
ification(Task task)
   at System.IO.Stream.<CopyToAsyncInternal>d__27.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNot
ification(Task task)

Answer 1

当我在 WebApi1 中将此请求作为 WCF 契约(Contract)的一部分运行时，我得到了堆栈跟踪:

   at System.Threading.Tasks.Task.ThrowIfExceptional(Boolean includeTaskCanceledExceptions)
   at System.Threading.Tasks.Task`1.GetResultCore(Boolean waitCompletionNotification)
   at System.Threading.Tasks.Task`1.get_Result()

但是我注意到 Exception 总是在 2 分钟后抛出......

比我尝试发送该 20GB 文件作为 Controller 方法的一部分(来自 WebAPI1)并在那里捕获 TaskCanceledException 。当这个异常发生时，我们可以通过检查标志 IsCancellationRequested 来判断是超时问题，如果它是 false 就意味着它是超时问题。
有用的帖子在这里:
HttpClient - A task was cancelled?

在我的例子中，stacktrace 中的 TaskCanceledException 被设置为 false ，所以它在 HttpClient 中超时

new HttpClient { Timeout = TimeSpan.FromMinutes(2) };

将限制增加到 10 分钟解决了这个问题。