c# - ASP.NET 的 WCF 流问题

Question

我有一个托管在 ASP.NET 应用程序中的 WCF 服务，我正在尝试使用流模式从另一个客户端 ASP.NET 应用程序上传文件。我不断收到以下错误:

The remote server returned an unexpected response: (400) Bad Request.

我浏览过网络寻求帮助，但无济于事。

主机配置:

    <bindings>
      <basicHttpBinding>
        <binding name="FileTransferServicesBinding"
          transferMode="Streamed"
          messageEncoding="Mtom"
          sendTimeout="01:05:00"
          maxReceivedMessageSize="10067108864">
        </binding>
      </basicHttpBinding>
    </bindings>
    <services>
      <service behaviorConfiguration="FileTransferServiceBehavior" name="WebServiceHost.TransferService">
        <clear />
        <endpoint address="" binding="basicHttpBinding"
          bindingConfiguration="FileTransferServicesBinding" contract="WebServiceHost.ITransferService">
          <identity>
            <dns value="localhost"/>
            <certificateReference storeName="My" storeLocation="LocalMachine"
                x509FindType="FindBySubjectDistinguishedName" />
          </identity>
        </endpoint>
        <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange">
        </endpoint>
        <host>
          <baseAddresses>
            <add baseAddress="http://localhost:11291/TransferService.svc" />
          </baseAddresses>
        </host>
      </service>
    </services>
    <behaviors>
      <serviceBehaviors>
        <behavior name="FileTransferServiceBehavior">
          <serviceMetadata httpGetEnabled="true" />
          <serviceDebug includeExceptionDetailInFaults="true" />
        </behavior>
      </serviceBehaviors>
    </behaviors>
  </system.serviceModel>

合约代码:

[ServiceContract]
public interface ITransferService
{
    [OperationContract]
    RemoteFileInfo DownloadFile(DownloadRequest request);

    [OperationContract]
    void UploadFile(RemoteFileInfo request);

    [OperationContract]
    string TestMethod();
}

[MessageContract]
public class DownloadRequest
{
    [MessageBodyMember]
    public string FileName;
}

[MessageContract]
public class RemoteFileInfo : IDisposable
{
    [MessageHeader(MustUnderstand = true)]
    public string FileName;

    [MessageHeader(MustUnderstand = true)]
    public long Length;

    [MessageBodyMember(Order = 1)]
    public System.IO.Stream FileByteStream;

    public void Dispose()
    {
        if (FileByteStream != null)
        {
            FileByteStream.Close();
            FileByteStream = null;
        }
    }
}

客户端配置:

<bindings>
  <basicHttpBinding>
    <binding name="FileTransferServicesBinding" sendTimeout="01:05:00"
        maxReceivedMessageSize="10067108864" messageEncoding="Mtom"
        transferMode="Streamed" />
  </basicHttpBinding>
</bindings>
<client>
  <endpoint address="http://localhost:11291/TransferService.svc/"
      binding="basicHttpBinding" bindingConfiguration="FileTransferServicesBinding"
      contract="TransferServiceReference.ITransferService" name="FileTransferService"
      kind="">
    <identity>
      <dns value="localhost" />
      <certificateReference storeName="My" storeLocation="LocalMachine"
          x509FindType="FindBySubjectDistinguishedName" />
    </identity>
  </endpoint>
</client>
<behaviors>
  <serviceBehaviors>
    <behavior>
      <serviceMetadata httpGetEnabled="true" />
      <serviceDebug includeExceptionDetailInFaults="true" />
    </behavior>
  </serviceBehaviors>
</behaviors>

客户端代码:

ITransferService clientUpload = new TransferServiceClient();

string datetime = clientUpload.TestMethod();

var uploadRequestInfo = new RemoteFileInfo();

uploadRequestInfo.FileName = FileUpload1.FileName;
uploadRequestInfo.Length = FileUpload1.PostedFile.ContentLength;
uploadRequestInfo.FileByteStream = FileUpload1.PostedFile.InputStream;
clientUpload.UploadFile(uploadRequestInfo);

clientUpload.TestMethod() 和 clientUpload.UploadFile(uploadRequestInfo) 的调用均失败。在缓冲模式下，会调用 clientUpload.TestMethod()，因此问题出在流模式下的配置上。

如果能就此事寻求任何帮助，我将不胜感激。谢谢。

Answer 1

我遇到了同样的问题，我发现这篇文章解释了如何解决您的错误。 http://www.c-sharpcorner.com/uploadfile/BruceZhang/stream-operation-in-wcf/ .

希望对您有所帮助!