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。

WebAPI1 编写于ASP.NET 4.6

WebAPI2 编写于ASP.NET Core 2.0

当我通过 Postman 将此文件发送到 WebAPI2 时，整个文件都会被发送。但是，当我尝试将文件从 WebAPI1 发送到 WebAPI2 时，它失败了（不过我可以发送 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 中作为 WCF 合约的一部分运行此请求时，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()

然而我注意到异常总是在 2 分钟后抛出......

我尝试将 20GB 文件作为控制器方法的一部分（来自 WebAPI1）发送并在那里捕获TaskCanceledException。当出现此异常时，我们可以通过检查标志来判断是否存在超时问题，IsCancellationRequested如果是false，则表示是超时问题。这里有帮助的帖子： HttpClient - 任务被取消？

在我的例子中TaskCanceledException， stacktrace 设置为false，所以 HttpClient 超时

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

将限制增加到 10 分钟解决了该问题。