PureBasic

Send a POP3 NOOP Command

Demonstrates the Chilkat MailMan.Pop3Noop method, which sends a POP3 NOOP command to the server. NOOP does nothing except elicit a positive response, which is useful for keeping a session alive or verifying the connection is still responsive. This example begins a POP3 session and sends a NOOP.

Background: NOOP ("no operation") is a standard keep-alive across many internet protocols. Servers often drop idle connections after a timeout; sending a periodic NOOP resets that timer so a long-running session stays open. It also serves as a cheap "are you still there?" probe — a successful reply confirms the socket and the authenticated session are still healthy.

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PureBasic

IncludeFile "CkMailMan.pb"

Procedure ChilkatExample()

    success.i = 0

    ;  Demonstrates the MailMan.Pop3Noop method, which sends a POP3 NOOP command to the server.
    ;  NOOP does nothing except elicit a positive response, which is useful for keeping a
    ;  session alive or verifying the connection is still responsive.

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

    ;  Configure the POP3 server connection.
    CkMailMan::setCkMailHost(mailman, "pop.example.com")
    CkMailMan::setCkMailPort(mailman, 995)
    CkMailMan::setCkPopSsl(mailman, 1)
    CkMailMan::setCkPopUsername(mailman, "user@example.com")
    CkMailMan::setCkPopPassword(mailman, "myPassword")

    ;  Begin a POP3 session.

    success = CkMailMan::ckPop3BeginSession(mailman)
    If success = 0
        Debug CkMailMan::ckLastErrorText(mailman)
        CkMailMan::ckDispose(mailman)
        ProcedureReturn
    EndIf

    ;  Send a NOOP to keep the session alive.
    success = CkMailMan::ckPop3Noop(mailman)
    If success = 0
        Debug CkMailMan::ckLastErrorText(mailman)
        CkMailMan::ckDispose(mailman)
        ProcedureReturn
    EndIf

    Debug "POP3 NOOP succeeded."


    CkMailMan::ckDispose(mailman)


    ProcedureReturn
EndProcedure