Question

我有一个在虚拟机上运行的WCF服务。我已经有一段时间没有更改此服务器或服务上的任何内容了。当我尝试通过约25 mb的服务发送文件时，我得到了：

----------------------------------------------------------
DateTime:    1/24/2019 12:22:04 PM
ClassName:   UploadPpsZipFile
Message:     There was no endpoint listening at http://www.myservice.com/xxx/FileService.svc that could accept the message. This is often caused by an incorrect address or SOAP action. See InnerException, if present, for more details.


Server stack trace: 
   at System.ServiceModel.Channels.HttpOutput.WebRequestHttpOutput.GetOutputStream()
   at System.ServiceModel.Channels.HttpOutput.Send(TimeSpan timeout)
   at System.ServiceModel.Channels.HttpChannelFactory`1.HttpRequestChannel.HttpChannelRequest.SendRequest(Message message, 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.ServiceChannelProxy.InvokeService(IMethodCallMessage methodCall, ProxyOperationRuntime operation)
   at System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message)

Exception rethrown at [0]: 
   at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
   at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
   at WebStorageFileTransfer.TruckTransferServiceReference.IFileService.UploadPpsZipFile(UploadFileRequest uploadFileRequest)
   at WebStorageFileTransfer.ProgramTypes.SendZip.SendZip_Upload.UploadPpsZipFile(FileParms fileParms)

Unable to connect to the remote server

   at System.Net.HttpWebRequest.GetRequestStream(TransportContext& context)
   at System.Net.HttpWebRequest.GetRequestStream()
   at System.ServiceModel.Channels.HttpOutput.WebRequestHttpOutput.GetOutputStream()

An attempt was made to access a socket in a way forbidden by its access permissions xxx.xxx.xxx.xxx:80

   at System.Net.Sockets.Socket.DoConnect(EndPoint endPointSnapshot, SocketAddress socketAddress)
   at System.Net.ServicePoint.ConnectSocketInternal(Boolean connectFailure, Socket s4, Socket s6, Socket& socket, IPAddress& address, ConnectSocketState state, IAsyncResult asyncResult, Exception& exception)
----------------------------------------------------------

我的app.exe.config看起来像这样：

<?xml version="1.0" encoding="utf-8"?>

<configuration>

  <startup>
    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0,Profile=Client" />
  </startup>

  <system.serviceModel>

    <bindings>

      <basicHttpBinding>
        <binding name="BasicHttpBinding_IFileService" maxReceivedMessageSize="2147483647" sendTimeout="00:02:00">
          <readerQuotas maxStringContentLength="2147483647" maxArrayLength="2147483647" />
        </binding>
      </basicHttpBinding>

    </bindings>

    <client>
      <endpoint address="http://www.myservice.com/xxxx/FileService.svc" binding="basicHttpBinding" bindingConfiguration="BasicHttpBinding_IFileService" contract="TruckTransferServiceReference.IFileService" name="BasicHttpBinding_IFileService" />
    </client>

  </system.serviceModel>
</configuration>

当我发送一个较小的文件（例如1mb文件）时，我没有任何问题。我已经在多台计算机上对此进行了测试，并且得到了相同的结果。

有什么建议吗？

Answer 1

您可以更改3件事以使其正常工作：

IIS主机设置：

我相信您已经在IIS中托管了WCF服务。因此，您需要设置发送大量数据时，您需要设置maxAllowedContentLength IIS设置（有关更多信息，请参阅配置IIS Request Limits）据我所知，该值默认为〜28MB。

接收的最大邮件大小：

您将不得不将此值更改为其他值（例如long.MaxValue）。默认情况下，它设置为64 KB。

启用流式传输

默认情况下，WCF的传输模式是缓冲的。在发送和接收所有数据时，需要将所有数据存储在内存中-这对于大文件是不可能的。

因此，您必须将模式更改为“流式”，如下所示：

<system.serviceModel>  
     …  
    <bindings>  
      <basicHttpBinding>  
        <binding name="ExampleBinding" transferMode="Streaming"/>  
      </basicHttpBinding>  
    </bindings>  
     …  
<system.serviceModel>

引用the documentation.

通过服务上载并获取消息终结点在较大文件中不可用

1 个答案: