; AcceptTCPStream Example
; -----------------------

; This program is server AND client at once: it listens on a
; port, then connects to itself over the loopback address.

port=4003

server=CreateTCPServer(port)
If server=0 Then
    Print "Could not listen on port "+port+" (it may be in use)"
Else
    Print "Server: listening on port "+port

    ; Open a client connection to our own server
    client=OpenTCPStream("127.0.0.1",port)
    If client=0 Then
        Print "Client: could not connect"
    Else
        Print "Client: connected to 127.0.0.1:"+port

        ; AcceptTCPStream returns the server's end of a new
        ; connection, or 0 if nobody is connecting right now -
        ; so a server normally polls it, as this loop does
        accepted=0
        For try=1 To 100
            accepted=AcceptTCPStream(server)
            If accepted<>0 Then Exit
            Delay 10
        Next

        If accepted=0 Then
            Print "Server: no connection arrived"
        Else
            Print "Server: AcceptTCPStream returned a stream after "+try+" poll(s)"

            ; The accepted stream reads and writes just like a file
            WriteLine client,"Hello server!"
            Print "Client: sent 'Hello server!'"
            Print "Server: received '"+ReadLine$(accepted)+"'"

            CloseTCPStream accepted
        EndIf
        CloseTCPStream client
    EndIf
    CloseTCPServer server
    Print "Server: closed"
EndIf

Print ""
Print "Press any key to close the example"
WaitKey

End