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WCF streaming service not working

My wcf client gives me the following error when trying to download a file from a service: "Error getting an HTTP response to http: //mypc-pc/xmlLoadService/Service.svc . This may be due to binding to a service endpoint that does not use the HTTP protocol. It can also be caused by the fact that the HTTP request server is interrupted by an HTTP request (possibly due to a service shutdown) .For more information, see the logs of the logs.

Executable code:

 System.IO.FileStream fs;
        try
        {
            fs = (System.IO.FileStream)client.Download(@"C:\UploadedFiles\Test.txt");
            byte[] arr = new byte[fs.Length];
            int read;
            do
            {
                read = fs.Read(arr, 0, arr.Length);

            } while (read != arr.Length);

            Console.WriteLine(ASCIIEncoding.ASCII.GetString(arr));
            Console.ReadLine();
        }

This is my web.config configuration:

<bindings>
   <basicHttpBinding>
       <binding name="basicHTTP" receiveTimeout="00:10:00" 
                sendTimeout="00:03:00" closeTimeout="00:10:00" 
                openTimeout="00:03:00" messageEncoding="Mtom" 
                maxBufferSize="100000" maxReceivedMessageSize="100000" 
                transferMode="Buffered">
       </binding>
   </basicHttpBinding>
</bindings>
<services>
   <service behaviorConfiguration="ServiceBehavior" name="Service">
       <endpoint address="" binding="wsHttpBinding" contract="IService">
           <identity>
               <dns value="localhost" />
           </identity>
       </endpoint>
       <endpoint address="mex" binding="mexHttpBinding" 
                 contract="IMetadataExchange" />
   </service>
   <service behaviorConfiguration="mexBehavior" 
            name="LoadXMLService.XMLOperations">
        <endpoint address="" 
                  binding="basicHttpBinding" 
                  bindingConfiguration="basicHTTP" 
                  behaviorConfiguration="" 
                  contract="LoadXMLService.IxmlLoad" />
   </service>
</services>

It does not work when the download function is called on the server.

UPDATE: from what I understand from the trace log, the file does not open at the end of the service.

This is the code that the file should open, and it does not throw any exceptions when passing through it step by step:

  public Stream Download( string path )
    {
        try
        {
            using (FileStream stream = new FileStream(path, FileMode.Open, FileAccess.Read))
            {

                return stream;
            }
        }
        catch (Exception ex)
        {
            string error = ex.Message;

            return null;
        }
    }

. :

<E2ETraceEvent xmlns="http://schemas.microsoft.com/2004/06/E2ETraceEvent">
<System xmlns="http://schemas.microsoft.com/2004/06/windows/eventlog/system">
<EventID>524340</EventID>
<Type>3</Type>
<SubType Name="Error">0</SubType>
<Level>2</Level>
<TimeCreated SystemTime="2009-10-04T15:20:22.7770000Z" />
<Source Name="System.ServiceModel" />
<Correlation ActivityID="{cb13d023-8122-4199-896c-78684b2461db}" />
<Execution ProcessName="WebDev.WebServer" ProcessID="8104" ThreadID="8" />
<Channel />
<Computer>TONY-PC</Computer>
</System>
<ApplicationData>
<TraceData>
<DataItem>
<TraceRecord xmlns="http://schemas.microsoft.com/2004/10/E2ETraceEvent/TraceRecord" Severity="Error">
<TraceIdentifier>http://msdn.microsoft.com/en-GB/library/System.ServiceModel.ServiceOperationExceptionOnReply.aspx</TraceIdentifier>
<Description>Replying to an operation threw a exception.</Description>
<AppDomain>b986c3da-11-128991431145070000</AppDomain>
<Source>System.ServiceModel.Dispatcher.ImmutableDispatchRuntime/48562646</Source>
<Exception>
<ExceptionType>System.ObjectDisposedException, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</ExceptionType>
<Message>Cannot access a closed file.</Message>
<StackTrace>
at System.IO.__Error.FileNotOpen()
at System.IO.FileStream.Read(Byte[] array, Int32 offset, Int32 count)
at System.Xml.XmlMtomWriter.WriteXOPBinaryParts()
at System.Xml.XmlMtomWriter.WriteEndElement()
at System.ServiceModel.Channels.Message.OnWriteMessage(XmlDictionaryWriter writer)
at System.ServiceModel.Channels.Message.WriteMessage(XmlDictionaryWriter writer)
at System.ServiceModel.Channels.MtomMessageEncoder.WriteMessage(Message message, Stream stream, String startInfo, String boundary, String startUri, Boolean writeMessageHeaders)
at System.ServiceModel.Channels.MtomMessageEncoder.WriteMessage(Message message, Stream stream, String boundary)
at System.ServiceModel.Channels.HttpOutput.WriteStreamedMessage(TimeSpan timeout)
at System.ServiceModel.Channels.HttpOutput.Send(TimeSpan timeout)
at System.ServiceModel.Channels.HttpRequestContext.OnReply(Message message, TimeSpan timeout)
at System.ServiceModel.Activation.HostedHttpContext.OnReply(Message message, TimeSpan timeout)
at System.ServiceModel.Channels.RequestContextBase.Reply(Message message, TimeSpan timeout)
at System.ServiceModel.Channels.RequestContextBase.Reply(Message message)
at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.Reply(MessageRpc&amp; rpc)
</StackTrace>
<ExceptionString>System.ObjectDisposedException: Cannot access a closed file.
   at System.IO.__Error.FileNotOpen()
   at System.IO.FileStream.Read(Byte[] array, Int32 offset, Int32 count)
   at System.Xml.XmlMtomWriter.WriteXOPBinaryParts()
   at System.Xml.XmlMtomWriter.WriteEndElement()
   at System.ServiceModel.Channels.Message.OnWriteMessage(XmlDictionaryWriter writer)
   at System.ServiceModel.Channels.Message.WriteMessage(XmlDictionaryWriter writer)
   at System.ServiceModel.Channels.MtomMessageEncoder.WriteMessage(Message message, Stream stream, String startInfo, String boundary, String startUri, Boolean writeMessageHeaders)
   at System.ServiceModel.Channels.MtomMessageEncoder.WriteMessage(Message message, Stream stream, String boundary)
   at System.ServiceModel.Channels.HttpOutput.WriteStreamedMessage(TimeSpan timeout)
   at System.ServiceModel.Channels.HttpOutput.Send(TimeSpan timeout)
   at System.ServiceModel.Channels.HttpRequestContext.OnReply(Message message, TimeSpan timeout)
   at System.ServiceModel.Activation.HostedHttpContext.OnReply(Message message, TimeSpan timeout)
   at System.ServiceModel.Channels.RequestContextBase.Reply(Message message, TimeSpan timeout)
   at System.ServiceModel.Channels.RequestContextBase.Reply(Message message)
   at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.Reply(MessageRpc&amp; rpc)</ExceptionString>
</Exception>
</TraceRecord>
</DataItem>
</TraceData>
<System.Diagnostics xmlns="http://schemas.microsoft.com/2004/08/System.Diagnostics">
<LogicalOperationStack></LogicalOperationStack>
<Timestamp>921505170062</Timestamp>
<Callstack>
at System.Environment.GetStackTrace(Exception e, Boolean needFileInfo)
at System.Environment.get_StackTrace()
at System.Diagnostics.TraceEventCache.get_Callstack()
at System.Diagnostics.XmlWriterTraceListener.WriteFooter(TraceEventCache eventCache)
at System.Diagnostics.XmlWriterTraceListener.TraceData(TraceEventCache eventCache, String source, TraceEventType eventType, Int32 id, Object data)
at System.Diagnostics.TraceSource.TraceData(TraceEventType eventType, Int32 id, Object data)
at System.ServiceModel.Diagnostics.DiagnosticTrace.TraceEvent(TraceEventType type, TraceCode code, String description, TraceRecord trace, Exception exception, Object source)
at System.ServiceModel.Diagnostics.TraceUtility.TraceEvent(TraceEventType severity, TraceCode traceCode, TraceRecord extendedData, Object source, Exception exception)
at System.ServiceModel.Diagnostics.TraceUtility.TraceEvent(TraceEventType severity, TraceCode traceCode, Object source, Exception exception)
at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.Reply(MessageRpc& rpc)
at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessageCleanup(MessageRpc& rpc)
at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage5(MessageRpc& rpc)
at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage4(MessageRpc& rpc)
at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage3(MessageRpc& rpc)
at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage2(MessageRpc& rpc)
at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage1(MessageRpc& rpc)
at System.ServiceModel.Dispatcher.MessageRpc.Process(Boolean isOperationContextSet)
at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.Dispatch(MessageRpc& rpc, Boolean isOperationContextSet)
at System.ServiceModel.Dispatcher.ChannelHandler.DispatchAndReleasePump(RequestContext request, Boolean cleanThread, OperationContext currentOperationContext)
at System.ServiceModel.Dispatcher.ChannelHandler.HandleRequest(RequestContext request, OperationContext currentOperationContext)
at System.ServiceModel.Dispatcher.ChannelHandler.AsyncMessagePump(IAsyncResult result)
at System.ServiceModel.Dispatcher.ChannelHandler.OnAsyncReceiveComplete(IAsyncResult result)
at System.ServiceModel.Diagnostics.Utility.AsyncThunk.UnhandledExceptionFrame(IAsyncResult result)
at System.ServiceModel.AsyncResult.Complete(Boolean completedSynchronously)
at System.ServiceModel.Channels.InputQueue`1.AsyncQueueReader.Set(Item item)
at System.ServiceModel.Channels.InputQueue`1.EnqueueAndDispatch(Item item, Boolean canDispatchOnThisThread)
at System.ServiceModel.Channels.InputQueue`1.EnqueueAndDispatch(T item, ItemDequeuedCallback dequeuedCallback, Boolean canDispatchOnThisThread)
at System.ServiceModel.Channels.InputQueueChannel`1.EnqueueAndDispatch(TDisposable item, ItemDequeuedCallback dequeuedCallback, Boolean canDispatchOnThisThread)
at System.ServiceModel.Channels.SingletonChannelAcceptor`3.Enqueue(QueueItemType item, ItemDequeuedCallback dequeuedCallback, Boolean canDispatchOnThisThread)
at System.ServiceModel.Channels.HttpChannelListener.HttpContextReceived(HttpRequestContext context, ItemDequeuedCallback callback)
at System.ServiceModel.Activation.HostedHttpTransportManager.HttpContextReceived(HostedHttpRequestAsyncResult result)
at System.ServiceModel.Activation.HostedHttpRequestAsyncResult.HandleRequest()
at System.ServiceModel.Activation.HostedHttpRequestAsyncResult.BeginRequest()
at System.ServiceModel.Activation.HostedHttpRequestAsyncResult.OnBeginRequest(Object state)
at System.ServiceModel.Channels.IOThreadScheduler.CriticalHelper.WorkItem.Invoke2()
at System.ServiceModel.Channels.IOThreadScheduler.CriticalHelper.WorkItem.Invoke()
at System.ServiceModel.Channels.IOThreadScheduler.CriticalHelper.ProcessCallbacks()
at System.ServiceModel.Channels.IOThreadScheduler.CriticalHelper.CompletionCallback(Object state)
at System.ServiceModel.Channels.IOThreadScheduler.CriticalHelper.ScheduledOverlapped.IOCallback(UInt32 errorCode, UInt32 numBytes, NativeOverlapped* nativeOverlapped)
at System.ServiceModel.Diagnostics.Utility.IOCompletionThunk.UnhandledExceptionFrame(UInt32 error, UInt32 bytesRead, NativeOverlapped* nativeOverlapped)
at System.Threading._IOCompletionCallback.PerformIOCompletionCallback(UInt32 errorCode, UInt32 numBytes, NativeOverlapped* pOVERLAP)
</Callstack>
</System.Diagnostics>
</ApplicationData>
</E2ETraceEvent>
+3
1

, , - ? - ?

  <system.serviceModel>
    <bindings>
      <basicHttpBinding>
        <binding name="FileTransferBinding"
                  transferMode="StreamedResponse" />
      </basicHttpBinding>
    </bindings>
    <client>
      <endpoint name="DefaultEndpoint"
                address="....."
                binding="basicHttpBinding"
                bindingConfiguration="FileTransferBinding"
                contract="IYourContract" />
    </client>
  </system.serviceModel>
  • a BindingConfiguration, transferMode=Streamed transferMode=StreamResponse
  • a , binding=basicHttpBinding bindingConfiguration=FileTransferBinding ( , )

, , .....

:. , transferMode="StreamResponse" . , !

2:, - , WCF - :

<configuration>
   <system.diagnostics>
      <sources>
            <source name="System.ServiceModel" 
                    switchValue="Information, ActivityTracing"
                    propagateActivity="true">
            <listeners>
               <add name="traceListener" 
                   type="System.Diagnostics.XmlWriterTraceListener" 
                   initializeData= "c:\log\Traces.svclog" />
            </listeners>
         </source>
      </sources>
   </system.diagnostics>
</configuration>

C:\log\traces.svclog (, ), , (SvcTraceViewer.exe C:\Program Files\Microsoft SDKs\Windows\v6.0A\Bin\)

MSDN , WCF .

3:, ( ), using() {...}!

:

public Stream Download( string path )
{
    try
    {
        FileStream stream = new FileStream(path, FileMode.Open, FileAccess.Read);
        return stream;
    }
    catch (Exception ex)
    {
        string error = ex.Message;
        return null;
    }
}

. , , , .

using() {....} ​​, " ".

+4

Source: https://habr.com/ru/post/1719218/

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