Check Whether a Socket Is Writable

See more Socket/SSL/TLS Examples

Demonstrates Socket.CheckWriteable, which waits for the connected socket to become writable. It returns 1 if writable, 0 if it did not become writable before the 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 to become writable.  Returns 1 if writable, 0 if it did not
    ;  become writable before the timeout, or -1 on error.
    writable.i = CkSocket::ckCheckWriteable(socket,5000)
    If writable < 0
        Debug CkSocket::ckLastErrorText(socket)
        CkSocket::ckDispose(socket)
        ProcedureReturn
    EndIf

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

    Debug "The socket is writable."


    CkSocket::ckDispose(socket)


    ProcedureReturn
EndProcedure