C++

Check the Last Known IMAP Connection State

Demonstrates the Chilkat Imap.IsConnected method, which returns the last known connection state without sending any data to the IMAP server. A true result does not prove that an idle connection is still usable. This example connects and reads the state.

Background: IsConnected is a cheap, cached check — it reports what Chilkat last observed without touching the network. That makes it fast, but it can be stale: a server or firewall may have silently dropped an idle connection. When you need to be sure the connection is actually alive, send a lightweight round trip such as Noop, or use CheckConnection for a low-level socket probe.

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C++

#include <CkImap.h>

void ChilkatSample(void)
    {
    bool success = false;

    //  Demonstrates the Imap.IsConnected method, which returns the last known connection state
    //  without sending data to the IMAP server.  A true result does not prove that an idle
    //  connection is still usable.

    CkImap imap;

    imap.put_Ssl(true);
    imap.put_Port(993);

    success = imap.Connect("imap.example.com");
    if (success == false) {
        std::cout << imap.lastErrorText() << "\r\n";
        return;
    }

    //  Check the last known connection state (no data is sent to the server).
    bool connected = imap.IsConnected();
    if (connected == true) {
        std::cout << "The IMAP object believes it is connected." << "\r\n";
    }
    else {
        std::cout << "The IMAP object is not connected." << "\r\n";
    }

    success = imap.Disconnect();
    if (success == false) {
        std::cout << imap.lastErrorText() << "\r\n";
        return;
    }
    }