TcpClient that won't receive; self destructing

Hi,

(this code is running on .NET v2 Beta 2)

I have this code that reads a NetworkStream from a TcpClient:

Public Sub Read(reader as StreamReader)
        Dim tmp As String = String.Empty
        Dim tries As Integer = 0

        Do While tmp = String.Empty
            If reader.BaseStream.CanRead = True Then
                Try
                    tmp = reader.ReadLine()
                    If tmp <> "~~START~~" Then
                        Throw New InvalidOperationException("Message received was invalid.")
                    End If

                    tmp = reader.ReadLine()
                    If Left(tmp, "Type:".Length) <> "Type:" Then
                        Throw New InvalidOperationException("Message received was invalid.")
                    End If
                    _type = Mid(tmp, "Type:".Length + 1)

                    tmp = reader.ReadLine()
                    Do While tmp <> "~~END~~"
                        If Me.Contents <> String.Empty Then
                            Me.Contents &= Environment.NewLine
                        End If
                        Me.Contents &= tmp
                        tmp = reader.ReadLine()
                    Loop
                Catch ex As Exception
                    tries += 1
                    If tries = 3 Then
                        Throw New IOException("Timed out waiting for a response.", ex)
                    Else
                        My.Application.Log.WriteEntry("Timed out waiting for a response, will retry, count: " & tries, TraceEventType.Warning)
                        Threading.Thread.Sleep(1000)
                    End If
                End Try
            Else
                Threading.Thread.Sleep(1000)
            End If
        Loop
End Sub

Every time it runs, the first call throws an IOException, and that is why it has the Try...Catch ex as Exception which then tries three times. Sometimes it throws a second exception and then works, sometimes it works after the first one. The server, which also uses this code, works OK every time without throwing an exception.

If it gets past that, it (the .NET framework) then disconnects the client, so I can't send a response back to the server.

Answer this question