Simple VB.Net text base communication server - vb.net

Question

I try for one week to provide a PHP application (client) and a VB.Net application (server) via text messages (JSON).
I must therefore open a socket server in VB.Net, read the client message and close the connection. Of course by managing connections from clients in separate threads since PHP may well send multiple queries simultaneously.
This is a trivial task in Java, as I usually do, but and a VB.Net I tried many solutions found on StackOverflow and CodeProject, but none is exactly what I want to achieve .

Answer 1

Finally I think I found something interesting !
Based on the post Writing a Simple HTTP Server in VB.Net from Patrick Santry, I have a functional class :
Imports System.Net
Imports System.Net.Sockets
Imports System.Text
Imports System.Threading
Public Class Server
#Region "Declarations"
Private Shared singleServer As Server
Private Shared blnFlag As Boolean
Private LocalTCPListener As TcpListener
Private LocalPort As Integer
Private LocalAddress As IPAddress = GetIPAddress()
Private ServerThread As Thread
#End Region
#Region "Properties"
Public Property ListenPort() As Integer
Get
Return LocalPort
End Get
Set(ByVal Value As Integer)
LocalPort = Value
End Set
End Property
Public ReadOnly Property ListenIPAddress() As IPAddress
Get
Return LocalAddress
End Get
End Property
#End Region
#Region "Methods"
Private Function GetIPAddress() As IPAddress
With System.Net.Dns.GetHostEntry(System.Net.Dns.GetHostName())
If .AddressList.Length > 0 Then
Return New IPAddress(.AddressList.GetLowerBound(0))
End If
End With
Return Nothing
End Function
Friend Shared Function getServer(ByVal LocalPort As Integer, ByVal Optional LocalAddress As String = Nothing) As Server
If Not blnFlag Then
singleServer = New Server
If Not LocalAddress Is Nothing Then
Server.singleServer.LocalAddress = IPAddress.Parse(LocalAddress)
End If
If Not LocalPort = 0 Then
Server.singleServer.LocalPort = LocalPort
End If
blnFlag = True
Return Server.singleServer
Else
Return Server.singleServer
End If
End Function
Public Sub StartServer()
Try
LocalTCPListener = New TcpListener(LocalAddress, LocalPort)
LocalTCPListener.Start()
ServerThread = New Thread(AddressOf StartListen)
serverThread.Start()
Catch ex As Exception
Console.WriteLine(ex.Message)
End Try
End Sub
Public Overloads Sub SendResponse(ByVal sData As String, ByRef thisSocket As Socket)
SendResponse(Encoding.UTF8.GetBytes(sData), thisSocket)
End Sub
Public Overloads Sub SendResponse(ByVal bSendData As [Byte](), ByRef thisSocket As Socket)
Dim iNumBytes As Integer = 0
If thisSocket.Connected Then
If (iNumBytes = thisSocket.Send(bSendData, bSendData.Length, 0)) = -1 Then
' socket error can't send packet
Else
' number of bytes sent.
End If
Else
' connection dropped.
End If
End Sub
Private Sub New()
' create a singleton
End Sub
Private Sub StartListen()
Do While True
' accept new socket connection
Dim mySocket As Socket = LocalTCPListener.AcceptSocket
If mySocket.Connected Then
Dim ClientThread As Thread = New Thread(Sub() Me.ProcessRequest(mySocket))
ClientThread.Start()
End If
Loop
End Sub
Private Sub ProcessRequest(ByRef mySocket As Socket)
Dim bReceive() As Byte = New [Byte](1024) {}
Dim i As Integer = mySocket.Receive(bReceive, bReceive.Length, 0)
Dim sRequest = Encoding.UTF8.GetString(bReceive)
Dim sResponse As String
sResponse = "Your message was : " & sRequest
SendResponse(sResponse, mySocket)
mySocket.Close()
End Sub
Public Sub StopServer()
Try
LocalTCPListener.Stop()
ServerThread.Abort()
Catch ex As Exception
Console.WriteLine(ex.Message)
End Try
End Sub
#End Region
End Class
It remains for me to process the request and generate the response in the processRequest method.