Question

在我目前工作的项目中，公开了一个WCF服务，它返回一个业务实体的数组，我们称之为Invoice：

Invoice[] GetInvoicesByTypeAndTime(InvoiceType invoiceType, byte startHour, byte? endHour);

使用的身份验证机制是Windows身份验证，WCF服务托管在IIS 6上托管的Web应用程序中。

首先，当我以前获取超过64kB的数据时，抛出了一个CommunicationException，指出“已超出传入邮件的最大邮件大小配额（65536）。要增加配额，请在相应的绑定元素上使用MaxReceivedMessageSize属性。“

很好，我刚刚在App.config中将maxReceivedMessageSize和maxBufferSize的值增加到65536000（我公然在最后添加了三个零）（后者因为它在ArgumentException中抱怨“For TransferMode.Buffered，MaxReceivedMessageSize和MaxBufferSize必须是相同的值。参数名称：bindingElement“）。

现在我可以收到更大的回复...

直到我达到另一个限制（我认为）之后，在624个元素（大约2.2 MB）之后会抛出一个奇怪的异常：

System.ServiceModel.Security.MessageSecurityException: The HTTP request is unauthorized with client authentication scheme 'Negotiate'. The authentication header received from the server was 'Negotiate,NTLM'. ---> System.Net.WebException: The remote server returned an error: (401) Unauthorized.
   at System.Net.HttpWebRequest.GetResponse()
   at System.ServiceModel.Channels.HttpChannelFactory.HttpRequestChannel.HttpChannelRequest.WaitForReply(TimeSpan timeout)
   --- End of inner exception stack trace ---

服务器堆栈跟踪：

   at System.ServiceModel.Channels.HttpChannelUtilities.ValidateAuthentication(HttpWebRequest request, HttpWebResponse response, WebException responseException, HttpChannelFactory factory)
   at System.ServiceModel.Channels.HttpChannelUtilities.ValidateRequestReplyResponse(HttpWebRequest request, HttpWebResponse response, HttpChannelFactory factory, WebException responseException)
   at System.ServiceModel.Channels.HttpChannelFactory.HttpRequestChannel.HttpChannelRequest.WaitForReply(TimeSpan timeout)
   at System.ServiceModel.Channels.RequestChannel.Request(Message message, TimeSpan timeout)
   at System.ServiceModel.Dispatcher.RequestChannelBinder.Request(Message message, TimeSpan timeout)
   at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs, TimeSpan timeout)
   at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs)
   at System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(IMethodCallMessage methodCall, ProxyOperationRuntime operation)
   at System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message)

在[0]处重新抛出异常：

   at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
   at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
   at Test2.DBS.IDbService.GetInvoicesByTypeAndTime(InvoiceType invoiceType, Byte startHour, Nullable`1 endHour)
   at Test2.DBS.DbServiceClient.GetInvoicesByTypeAndTime(InvoiceType invoiceType, Byte startHour, Nullable`1 endHour) in D:\TEMP\Test2\Test2\Service References\DBS\Reference.cs:line 1445
   at Test2.Program.Main(String[] args) in D:\TEMP\Test2\Test2\Program.cs:line 19

对经过身份验证的回复是否有限制？ ASP.NET设置是否有限制？

Answer 1

我猜你正在使用Windows身份验证因此而不是一条消息，解释你是如何破坏你的消息限制的。当您通过Windows Authenticated请求发送时，WCF发送SOAP请求两次，一次失败并返回一个接受标头，第二次发送带有Windows身份验证标头。

但是，从我的测试来看，如果邮件真的失败了，看起来你仍然会得到401.

要解决此问题，我必须将服务器跟踪日志记录放入：

<system.diagnostics>
    <trace autoflush="true" />
    <sources>
      <source name="System.ServiceModel" switchValue="Critical, Error, Warning">
        <listeners>
          <add name="traceListener" type="System.Diagnostics.XmlWriterTraceListener" initializeData="C:\Logs\ServiceTrace.svclog"/>
        </listeners>
      </source>
    </sources>
  </system.diagnostics>

然后，我必须加入更大的读者配额，如上所述（但我使用较小的值）：

然后，您通常需要设置自定义行为以增加对象图中的最大项目数：

<behaviors>
  <serviceBehaviors>
    <behavior name="MaximumItemsBehaviour">
      <dataContractSerializer maxItemsInObjectGraph="2147483647" />
      <!-- To avoid disclosing metadata information, set the value below to false and remove the metadata endpoint above before deployment -->
      <serviceMetadata httpsGetEnabled="true" httpGetEnabled="false" />
      <!-- To receive exception details in faults for debugging purposes, set the value below to true.  Set to false before deployment to avoid disclosing exception information -->
      <serviceDebug includeExceptionDetailInFaults="true" />
    </behavior>
  </serviceBehaviors>
</behaviors>

您需要在“<system.serviceModel><services><service>”元素中添加“behaviourConfiguration”属性，其值为“MaximumItemsBehaviour”。

我读过的其他建议，但不需要自己就是补充：

  <system.web>
    <compilation debug="true" targetFramework="4.0" />
    <httpRuntime maxRequestLength="2097151" />
  </system.web>

和

  <system.webServer>
    <modules runAllManagedModulesForAllRequests="true" />
    <security>
      <requestFiltering>
        <requestLimits maxAllowedContentLength="209715200"/>
      </requestFiltering>
    </security>
  </system.webServer>

Answer 2

在客户端查看readerQuotas，如果你想要TLDR版本 - 看看这确实是你的问题，你可以设置max（Int32.MaxValue），如下所示。

<readerQuotas maxDepth="2147483647" maxStringContentLength="2147483647" maxArrayLength="2147483647" maxBytesPerRead="2147483647" maxNameTableCharCount="2147483647" />

WCF响应太长 - 身份验证错误

2 个答案: