如果下面的内容太长,我的问题是 Visual Studio 2013 中的 IIS Express 8 是否遵守 maxAllowedContentLength
属性,或者它是否具有一些阻止大型请求的重写值
针对 Visual Studio 2013 调试某些 webapi 调用时,我收到此错误:
超出最大请求长度。
我搜索了互联网,所有内容似乎都指向这两个配置条目:
IIS 6-: maxRequestLength
IIS 7+: maxAllowedContentLength
为了安全起见,我已将这两个配置条目添加到我的 web.config 中,其值为 4294967295。当我尝试调用 Controller 时,我仍然收到错误。
这让我认为我正在向服务器发送大量数据,但 fiddler 告诉我:
Request Count: 1
Bytes Sent: 4,327,084 (headers:1,026; body:4,326,058)
Bytes Received: 3,808 (headers:434; body:3,374)
从结果来看,4,327,084 < 4,294,967,295 我觉得这个请求应该不会有任何问题。
我想到的下一个地方是我的服务器代码:
if (!Request.Content.IsMimeMultipartContent())
{
throw new HttpResponseException(HttpStatusCode.UnsupportedMediaType);
}
var provider = new MultipartFormDataStreamProvider(@"C:\tmp", Int32.MaxValue);
var task = Request.Content.ReadAsMultipartAsync(provider).ContinueWith(t =>
{
if (t.IsFaulted || t.IsCanceled)
throw t.Exception; // <== This gets thrown
因此,请求的大小再次明显小于数据流提供程序的缓冲区大小。
总而言之,我不知道发生了什么。这个请求相当大,但据我所知,没有理由会失败。这是VS13/IIS Exp8引起的吗?还是我还缺少其他东西?
预先感谢您提供的任何帮助。
这是我说要提供的配置条目
<requestLimits maxAllowedContentLength="4294967295" />
这是完整的异常
System.IO.IOException: Error reading MIME multipart body part. ---> System.Web.HttpException: Maximum request length exceeded.
at System.Web.HttpBufferlessInputStream.ValidateRequestEntityLength()
at System.Web.HttpBufferlessInputStream.GetPreloadedContent(Byte[] buffer, Int32& offset, Int32& count)
at System.Web.HttpBufferlessInputStream.BeginRead(Byte[] buffer, Int32 offset, Int32 count, AsyncCallback callback, Object state)
at System.IO.Stream.<BeginEndReadAsync>b__d(Stream stream, ReadWriteParameters args, AsyncCallback callback, Object state)
at System.Threading.Tasks.TaskFactory`1.FromAsyncTrim[TInstance,TArgs](TInstance thisRef, TArgs args, Func`5 beginMethod, Func`3 endMethod)
at System.IO.Stream.BeginEndReadAsync(Byte[] buffer, Int32 offset, Int32 count)
at System.IO.Stream.ReadAsync(Byte[] buffer, Int32 offset, Int32 count, CancellationToken cancellationToken)
at System.Web.Http.WebHost.SeekableBufferedRequestStream.<ReadAsync>d__0.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
at System.Net.Http.HttpContentMultipartExtensions.<MultipartReadAsync>d__8.MoveNext()
--- End of inner exception stack trace ---
at System.Net.Http.HttpContentMultipartExtensions.<MultipartReadAsync>d__8.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
at System.Net.Http.HttpContentMultipartExtensions.<ReadAsMultipartAsync>d__0`1.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
at BICWeb.webservices.controllers.FormsDesignerController.<Post>d__b.MoveNext() in c:\code\BIC_CORE\TRUNK\BIC\src\BICWeb\webservices\controllers\FormsDesignerController.cs:line 300
以及内部异常
System.Web.HttpException (0x80004005): Maximum request length exceeded.
at System.Web.HttpBufferlessInputStream.ValidateRequestEntityLength()
at System.Web.HttpBufferlessInputStream.GetPreloadedContent(Byte[] buffer, Int32& offset, Int32& count)
at System.Web.HttpBufferlessInputStream.BeginRead(Byte[] buffer, Int32 offset, Int32 count, AsyncCallback callback, Object state)
at System.IO.Stream.<BeginEndReadAsync>b__d(Stream stream, ReadWriteParameters args, AsyncCallback callback, Object state)
at System.Threading.Tasks.TaskFactory`1.FromAsyncTrim[TInstance,TArgs](TInstance thisRef, TArgs args, Func`5 beginMethod, Func`3 endMethod)
at System.IO.Stream.BeginEndReadAsync(Byte[] buffer, Int32 offset, Int32 count)
at System.IO.Stream.ReadAsync(Byte[] buffer, Int32 offset, Int32 count, CancellationToken cancellationToken)
at System.Web.Http.WebHost.SeekableBufferedRequestStream.<ReadAsync>d__0.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
at System.Net.Http.HttpContentMultipartExtensions.<MultipartReadAsync>d__8.MoveNext()
最佳答案
让我们看看抛出的代码:
private void ValidateRequestEntityLength()
{
if (!this._disableMaxRequestLength && (this.Length > this._maxRequestLength))
{
if (!(this._context.WorkerRequest is IIS7WorkerRequest))
{
this._context.Response.CloseConnectionAfterError();
}
throw new HttpException(SR.GetString("Max_request_length_exceeded"), null, 0xbbc);
}
}
设计者设置这些选项:
internal HttpBufferlessInputStream(HttpContext context, bool persistEntityBody, bool disableMaxRequestLength)
{
this._context = context;
this._persistEntityBody = persistEntityBody;
this._disableMaxRequestLength = disableMaxRequestLength;
HttpRuntimeSection httpRuntime = RuntimeConfig.GetConfig(this._context).HttpRuntime;
this._maxRequestLength = httpRuntime.MaxRequestLengthBytes;
this._fileThreshold = httpRuntime.RequestLengthDiskThresholdBytes;
if (this._persistEntityBody)
{
this._rawContent = new HttpRawUploadedContent(this._fileThreshold, this._context.Request.ContentLength);
}
int contentLength = this._context.Request.ContentLength;
this._remainingBytes = (contentLength > 0) ? contentLength : 0x7fffffff;
this._length = contentLength;
}
您可以使用此HttpRequest
函数来禁用限制:
public Stream GetBufferlessInputStream(bool disableMaxRequestLength)
{
return this.GetInputStream(false, disableMaxRequestLength);
}
如果您想知道如何计算字节限制,请反编译httpRuntime.MaxRequestLengthBytes
。
关于c# - IIS Express 8 - 最大允许长度,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/30868950/