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Chúng tôi có dịch vụ WCF chấp nhận luồng từ máy khách (máy khách tải tệp lên máy chủ). Tuy nhiên, nếu máy chủ ném một FaultException trước hoặc trong luồng khách hàng chỉ mang trên streaming cho đến khi kết thúc bất kể, tại thời điểm đó nó nhận được FaultException từ máy chủ - lãng phí thời gian & băng thông cho khách hàng.WCF - Hủy bỏ luồng từ máy khách đến máy chủ nếu máy chủ ném một FaultException
Câu hỏi tương tự:
How to Abort a WCF File Upload from the Server-Side Method
Đi như sau (dịch vụ WCF đơn giản hóa)
Namespace JP_WCF
<ServiceContract> _
Public Interface IJP_WCF
<OperationContract> _
<FaultContract(GetType(JP_WCF_Fault))> _
Sub UploadFile(request As JP_WCF_FileUpload)
<OperationContract> _
<FaultContract(GetType(JP_WCF_Fault))> _
Function fakeError(ByVal int1 As Integer, ByVal int2 As Integer) As Integer
<OperationContract> _
<FaultContract(GetType(JP_WCF_Fault))> _
Function Ping() As Date
End Interface
<MessageContract> _
Public Class JP_WCF_FileUpload
Implements IDisposable
<MessageHeader(MustUnderstand:=True)> _
Public FileName As String
<MessageHeader(MustUnderstand:=True)> _
Public Length As Long
<MessageBodyMember(Order:=1)> _
Public FileByteStream As System.IO.Stream
Public Sub Dispose() Implements IDisposable.Dispose
If FileByteStream IsNot Nothing Then
FileByteStream.Close()
FileByteStream = Nothing
End If
End Sub
End Class
<DataContract> _
Public Class JP_WCF_Fault
<DataMember> _
Public Property EventID() As Integer
<DataMember> _
Public Property Message() As String
<DataMember> _
Public Property Description() As String
Public Sub New(ByVal _EventID As Integer, ByVal _Message As String, ByVal _Description As String)
Me.EventID = _EventID
Me.Message = _Message
Me.Description = _Description
End Sub
End Class
End Namespace
Ví dụ máy chủ phương pháp:
Try
Dim sourceStream As Stream = request.FileByteStream
Dim uploadFolder As String = "C:\upload\"
Dim filePath As String = Path.Combine(uploadFolder, request.FileName)
Using targetStream = New FileStream(filePath, FileMode.Create, FileAccess.Write, FileShare.None)
sourceStream.CopyTo(targetStream)
targetStream.Close()
sourceStream.Close()
End Using
Catch ex As Exception
Throw New FaultException(Of JP_WCF_Fault)(New JP_WCF_Fault(8, ex.Message, ex.ToString), ex.Message)
End Try
Ví dụ khách hàng Phương pháp:
Dim fileInfo As New System.IO.FileInfo(filePath)
Dim startTime As DateTime = DateTime.Now
Console.WriteLine("Starting V2 upload: " + DateTime.Now.ToString())
Dim JPCS As New JP_WCFService.JP_WCFClient()
Using stream As New System.IO.FileStream(filePath, System.IO.FileMode.Open, System.IO.FileAccess.Read)
Using uploadStreamWithProgress As New JP_StreamWithProgress(stream)
AddHandler uploadStreamWithProgress.ProgressChanged, AddressOf uploadStreamWithProgress_ProgressChanged
Try
JPCS.UploadFile(fileInfo.Name, fileInfo.Length, uploadStreamWithProgress)
Catch ex As FaultException(Of JP_WCFService.JP_WCF_Fault)
Console.WriteLine("Upload Error: " & ex.Detail.Message & " (EventID: " & ex.Detail.EventID.ToString & ")")
End Try
End Using
End Using
Dim endTime As DateTime = DateTime.Now
Dim durationInMS As Double = (endTime - startTime).TotalMilliseconds
Console.WriteLine(vbCr & "V2 Upload Completed: " + DateTime.Now.ToString() + " (" + durationInMS.ToString() + ")")
JPCS.Close()
web.config
<system.serviceModel>
<bindings>
<customBinding>
<binding name="JP_WCFBinding">
<!-- maxReceivedMessageSize 600MB, maxBufferSize 2MB -->
<binaryMessageEncoding compressionFormat="GZip" />
<httpsTransport transferMode="Streamed" maxReceivedMessageSize="629145600" maxBufferSize="2097152"/>
</binding>
</customBinding>
</bindings>
<services>
<service behaviorConfiguration="JP_WCFbehavior" name="JP_WCF.JP_WCFServices">
<endpoint address="" binding="customBinding" bindingConfiguration="JP_WCFBinding" contract="JP_WCF.IJP_WCF"/>
</service>
</services>
<behaviors>
<serviceBehaviors>
<behavior name="JP_WCFbehavior">
<serviceMetadata httpGetEnabled="false" httpsGetEnabled="true" />
<serviceDebug includeExceptionDetailInFaults="true" />
</behavior>
</serviceBehaviors>
</behaviors>
<serviceHostingEnvironment aspNetCompatibilityEnabled="true" multipleSiteBindingsEnabled="true" />
</system.serviceModel>
app.config
<system.serviceModel>
<bindings>
<customBinding>
<binding name="CustomBinding_IJP_WCF">
<binaryMessageEncoding compressionFormat="GZip" />
<httpsTransport transferMode="Streamed" />
</binding>
</customBinding>
</bindings>
<client>
<endpoint address="https://dev-wcf.localhost/JP_WCF.svc"
binding="customBinding" bindingConfiguration="CustomBinding_IJP_WCF"
contract="JP_WCFService.IJP_WCF" name="CustomBinding_IJP_WCF" />
</client>
</system.serviceModel>
Tôi đang tự hỏi, làm thế nào bạn phát hiện rằng tiếp tục dòng sau khi một ngoại lệ xảy ra? –
Ngoài ra, triển khai cho 'uploadStreamWithProgress' là gì? –