(C++) Read IMAP Email Headers

Call FetchHeaders to download only the email headers.

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#include <CkImap.h>
#include <CkMessageSet.h>
#include <CkEmailBundle.h>
#include <CkEmail.h>

void ChilkatSample(void)
    {
    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkImap imap;

    // Connect to an IMAP server.
    // Use TLS
    imap.put_Ssl(true);
    imap.put_Port(993);
    bool success = imap.Connect("imap.someMailServer.com");
    if (success != true) {
        std::cout << imap.lastErrorText() << "\r\n";
        return;
    }

    // Login
    success = imap.Login("****","****");
    if (success != true) {
        std::cout << imap.lastErrorText() << "\r\n";
        return;
    }

    // Select an IMAP mailbox
    success = imap.SelectMailbox("Inbox");
    if (success != true) {
        std::cout << imap.lastErrorText() << "\r\n";
        return;
    }

    CkMessageSet *messageSet = 0;
    // We can choose to fetch UIDs or sequence numbers.
    bool fetchUids = true;
    // Get the message IDs of all the emails in the mailbox
    messageSet = imap.Search("ALL",fetchUids);
    if (imap.get_LastMethodSuccess() != true) {
        std::cout << imap.lastErrorText() << "\r\n";
        return;
    }

    // When downloading headers, each email object contains
    // (obviously) the headers, but the body will be missing.
    // Also, attachments will not be included.  However, it is
    // possible to get information about the attachments
    // as well as the complete size of the email.
    CkEmailBundle *bundle = 0;
    bundle = imap.FetchHeaders(*messageSet);
    if (imap.get_LastMethodSuccess() != true) {
        delete messageSet;
        std::cout << imap.lastErrorText() << "\r\n";
        return;
    }

    // Loop over the email objects and display information
    // about each:
    int i;
    for (i = 0; i <= bundle->get_MessageCount() - 1; i++) {
        CkEmail *email = 0;
        email = bundle->GetEmail(i);

        // Display the From and Subject
        std::cout << email->ck_from() << "\r\n";
        std::cout << email->subject() << "\r\n";

        // Display the recipients:
        int j;
        const char *name = 0;
        const char *addr = 0;
        for (j = 0; j <= email->get_NumTo() - 1; j++) {
            name = email->getToName(j);
            addr = email->getToAddr(j);
            std::cout << name << ", " << addr << "\r\n";
        }

        for (j = 0; j <= email->get_NumCC() - 1; j++) {
            name = email->getCcName(j);
            addr = email->getCcAddr(j);
            std::cout << name << ", " << addr << "\r\n";
        }

        // Show the total size of the email, including body and attachments:
        std::cout << email->get_Size() << "\r\n";

        // When a full email is downloaded, we would use the
        // email.NumAttachments property in conjunction with the
        // email.GetMailAttach* methods.
        // However, when an email object contains only the header,
        // we need to access the attachment info differently:
        int numAttach = imap.GetMailNumAttach(*email);
        for (j = 0; j <= numAttach - 1; j++) {
            std::cout << imap.getMailAttachFilename(*email,j) << "\r\n";
            int attachSize = imap.GetMailAttachSize(*email,j);
            std::cout << "    size = " << attachSize << " bytes" << "\r\n";
        }

        std::cout << "--" << "\r\n";
        delete email;
    }

    // Disconnect from the IMAP server.
    success = imap.Disconnect();

    delete messageSet;
    delete bundle;
    }