PowerBuilder

Send an IMAP NOOP Command

Demonstrates the Chilkat Imap.Noop method, which sends the IMAP NOOP command and waits for the server response. It is useful for verifying that an existing authenticated connection is still responsive, and for keeping the connection alive. This example connects, logs in, and sends a NOOP.

Background: Because NOOP makes an actual round trip to the server, a successful reply proves the connection is genuinely alive — something the cached IsConnected cannot. It doubles as a keep-alive to prevent an idle session from timing out. In IMAP, NOOP also gives the server a chance to report changes in the selected mailbox, such as newly-arrived messages.

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PowerBuilder

integer li_rc
integer li_Success
oleobject loo_Imap

li_Success = 0

//  Demonstrates the Imap.Noop method, which sends the IMAP NOOP command and waits for the
//  server response.  It is useful for verifying that an existing authenticated connection is
//  still responsive and for keeping the connection alive.

loo_Imap = create oleobject
li_rc = loo_Imap.ConnectToNewObject("Chilkat.Imap")
if li_rc < 0 then
    destroy loo_Imap
    MessageBox("Error","Connecting to COM object failed")
    return
end if

loo_Imap.Ssl = 1
loo_Imap.Port = 993

li_Success = loo_Imap.Connect("imap.example.com")
if li_Success = 0 then
    Write-Debug loo_Imap.LastErrorText
    destroy loo_Imap
    return
end if

li_Success = loo_Imap.Login("user@example.com","myPassword")
if li_Success = 0 then
    Write-Debug loo_Imap.LastErrorText
    destroy loo_Imap
    return
end if

//  Send a NOOP round trip to confirm the connection is alive.
li_Success = loo_Imap.Noop()
if li_Success = 0 then
    Write-Debug loo_Imap.LastErrorText
    destroy loo_Imap
    return
end if

Write-Debug "IMAP NOOP succeeded."

li_Success = loo_Imap.Disconnect()
if li_Success = 0 then
    Write-Debug loo_Imap.LastErrorText
    destroy loo_Imap
    return
end if



destroy loo_Imap