Classic ASP

Check the IMAP Socket Connection

Demonstrates the Chilkat Imap.CheckConnection method, which checks whether the underlying TCP socket is currently connected to the IMAP server. This performs a low-level socket-state check and does not send an IMAP command. This example connects and checks the socket.

Background: CheckConnection sits between the cached IsConnected and a full protocol round trip: it inspects the actual socket without sending an IMAP command, so it can catch a locally-closed socket that the cached flag would miss. It still cannot detect every half-open connection, though — only a real command like Noop that expects a server reply proves the session is genuinely alive end to end.

Chilkat Classic ASP Downloads

Download Chilkat for Classic ASP

Classic ASP

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<%
success = 0

'  Demonstrates the Imap.CheckConnection method, which checks whether the underlying TCP
'  socket is currently connected to the IMAP server.  This is a low-level socket-state check
'  and does not send an IMAP command.

set imap = Server.CreateObject("Chilkat.Imap")

imap.Ssl = 1
imap.Port = 993

success = imap.Connect("imap.example.com")
If (success = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( imap.LastErrorText) & "</pre>"
    Response.End
End If

'  Perform a low-level check of the socket connection state.
stillConnected = imap.CheckConnection()
If (stillConnected = 1) Then
    Response.Write "<pre>" & Server.HTMLEncode( "The socket is still connected.") & "</pre>"
Else
    Response.Write "<pre>" & Server.HTMLEncode( "The socket is no longer connected.") & "</pre>"
End If

success = imap.Disconnect()
If (success = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( imap.LastErrorText) & "</pre>"
    Response.End
End If


%>
</body>
</html>