托管在IIS网站上且TransferMode=Streamed的WCF服务引发w3wp.exe OutOfMemory异常？

我已经建立了一个WCF服务来上传和下载文件

服务：托管在IIS asp.net网站上：

[ServiceContract]
public interface IFileTransferService
{
 [OperationContract(IsOneWay = true)]
 void Upload(FileTransferRequest request);
}

[MessageContract()]
public class FileTransferRequest
{
 [MessageHeader(MustUnderstand = true)]
 public string FileName;

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

}

[AspNetCompatibilityRequirements(RequirementsMode= AspNetCompatibilityRequirementsMode.Required)]
public class FileTransferService : IFileTransferService
{
 public FileTransferService()
 {
  HttpContext httpContext = HttpContext.Current;

  if (httpContext != null)
  {
   httpContext.Response.BufferOutput = false;
  }
 }

 public void Upload(FileTransferRequest request)
 {
  string fileName = System.Guid.NewGuid().ToString() + request.FileName;

  if (ConfigurationManager.AppSettings["UploadPath"] == null)
  {
   throw new ApplicationException("Missing upload path");
  }

  string uploadPath = "/OutputFeeds";
  string filePath = Path.Combine(Path.GetFullPath(HttpContext.Current.Server.MapPath(uploadPath)), fileName);

  FileStream fs = null;
  try
  {
   fs = File.Create(filePath);
   byte[] buffer = new byte[1024];
   int read = 0;
   while ((read = request.Data.Read(buffer, 0, buffer.Length)) != 0)
   {
    fs.Write(buffer, 0, read);
   }
  }
  finally
  {
   if (fs != null)
   {
    fs.Close();
    fs.Dispose();
   }

   if (request.Data != null)
   {
    request.Data.Close();
    request.Data.Dispose();
   }
  }
 }    
}

服务器配置：

<system.serviceModel>
 <serviceHostingEnvironment aspNetCompatibilityEnabled="true">
  </serviceHostingEnvironment>
 <bindings>
  <basicHttpBinding>
  <binding name="HttpBinding_MTOM" messageEncoding="Mtom" transferMode="Streamed" maxBufferSize="2147483647" maxReceivedMessageSize="2147483647">
   <security mode="None">
   <transport clientCredentialType="None" />
   </security>
  </binding>

 </bindings>
 <services>

  <service behaviorConfiguration="FileTransferServiceBehavior"
  name="FileTransferService">
  <endpoint address="" binding="basicHttpBinding" bindingConfiguration="HttpBinding_MTOM"
   contract="IFileTransferService">
   <identity>
   <dns value="localhost" />
   </identity>
  </endpoint>
  <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" />
  </service>

 </services>
 <behaviors>
  <serviceBehaviors>

  <behavior name="FileTransferServiceBehavior">
   <serviceMetadata httpGetEnabled="true" />
   <serviceDebug includeExceptionDetailInFaults="false" />
  </behavior>

  </serviceBehaviors>
 </behaviors>
 </system.serviceModel>

注意：如果我在客户机中将传输模式更改为buffered，它会工作，但是如果将客户机上的传输模式更改为Streamed，则不会工作，并抛出outofmemory错误

---

另一个

我想知道流是否在服务端被强制作为缓冲。什么是FileTransferRequest——是第三方吗？WCF中的流通常要求流是公开服务方法中的唯一参数

“请注意，向以下Echo或ProvideInfo操作添加第二个参数会导致服务模型恢复为缓冲策略，并使用流的运行时序列化表示。只有具有单个输入流参数的操作才与端到端请求流兼容

---

此规则同样适用于消息协定。如以下消息协定所示，在消息协定中只能有一个作为流的正文成员。如果要与流通信其他信息，则此信息必须是消息头中附带的。消息正文仅保留给流内容。“

FileTransferRequest

是示例中显示的消息协定，定义正确。@andrewbadera如Ladislav所述……FileTransferRequest是消息协定，当传输模式在客户端设置为“缓冲”，在服务器上设置为“流式”时，它会工作@拉迪斯拉夫·姆尔恩卡……我希望双方都能顺利交接；——现在在上面引用。但是消息只有第二个参数。第二个参数是始终缓冲的自定义soap头。这不会中断http上的流。@andrewbadera我根据您的建议更改了服务合同，但是它不起作用，并且出现了相同的异常。如果您不使用

在客户端上使用
来处理文件流，会发生什么情况？
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
 <system.serviceModel>
  <bindings>
   <basicHttpBinding>
    <binding name="BasicHttpBinding_IFileTransferService" closeTimeout="00:01:00"
     openTimeout="00:01:00" receiveTimeout="00:10:00" sendTimeout="00:01:00"
     allowCookies="false" bypassProxyOnLocal="false" hostNameComparisonMode="StrongWildcard"
     maxBufferSize="65536" maxBufferPoolSize="2147483647" maxReceivedMessageSize="2147483647"
     messageEncoding="Mtom" textEncoding="utf-8" transferMode="Streamed"
     useDefaultWebProxy="true">
     <readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="16384"
      maxBytesPerRead="4096" maxNameTableCharCount="16384" />
     <security mode="None">
      <transport clientCredentialType="None" proxyCredentialType="None"
       realm="">
       <extendedProtectionPolicy policyEnforcement="Never" />
      </transport>
      <message clientCredentialType="UserName" algorithmSuite="Default" />
     </security>
    </binding>

   </basicHttpBinding>
  </bindings>
  <client>
   <endpoint address="http://ht/FileTransferService.svc" binding="basicHttpBinding"
    bindingConfiguration="BasicHttpBinding_IFileTransferService"
    contract="HobbyTown.IFileTransferService" name="BasicHttpBinding_IFileTransferService" />

  </client>
 </system.serviceModel>
</configuration>

 string inputFile = @"C:\Client\InputFeeds\FullInventory.zip";
 using (FileStream fs = new FileStream(inputFile, FileMode.Open))
 {
    FileTransferServiceClient proxy = new FileTransferServiceClient();
    proxy.Upload("Inventory.Zip", fs);
    //proxy.Upload(trIn);
 }