Wait for a Socket to Become Writable

See more Socket/SSL/TLS Examples

Demonstrates Socket.SelectForWriting, which waits for the socket, or sockets in a socket set, to become writable. It returns 1 if writable, 0 on timeout, or -1 on error.

IncludeFile "CkSocket.pb"

Procedure ChilkatExample()

    success.i = 0

    socket.i = CkSocket::ckCreate()
    If socket.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    ;  Connect to the server using TLS.
    bTls.i = 1
    maxWaitMs.i = 5000
    success = CkSocket::ckConnect(socket,"example.com",5000,bTls,maxWaitMs)
    If success = 0
        Debug CkSocket::ckLastErrorText(socket)
        CkSocket::ckDispose(socket)
        ProcedureReturn
    EndIf

    ;  Wait up to 5 seconds for the socket (or sockets in a socket set) to become writable.  Returns 1 if
    ;  writable, 0 on timeout, or -1 on error.
    ready.i = CkSocket::ckSelectForWriting(socket,5000)
    If ready < 0
        Debug CkSocket::ckLastErrorText(socket)
        CkSocket::ckDispose(socket)
        ProcedureReturn
    EndIf

    If ready <> 1
        Debug "The socket did not become writable before the timeout."
        CkSocket::ckDispose(socket)
        ProcedureReturn
    EndIf

    Debug "The socket is ready for writing."


    CkSocket::ckDispose(socket)


    ProcedureReturn
EndProcedure