(Unicode C) Read IMAP Email Headers

Call FetchHeaders to download only the email headers.

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#include <C_CkImapW.h>
#include <C_CkMessageSetW.h>
#include <C_CkEmailBundleW.h>
#include <C_CkEmailW.h>

void ChilkatSample(void)
    {
    HCkImapW imap;
    BOOL success;
    HCkMessageSetW messageSet;
    BOOL fetchUids;
    HCkEmailBundleW bundle;
    int i;
    HCkEmailW email;
    int j;
    const wchar_t *name;
    const wchar_t *addr;
    int numAttach;
    int attachSize;

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

    imap = CkImapW_Create();

    // Connect to an IMAP server.
    // Use TLS
    CkImapW_putSsl(imap,TRUE);
    CkImapW_putPort(imap,993);
    success = CkImapW_Connect(imap,L"imap.someMailServer.com");
    if (success != TRUE) {
        wprintf(L"%s\n",CkImapW_lastErrorText(imap));
        CkImapW_Dispose(imap);
        return;
    }

    // Login
    success = CkImapW_Login(imap,L"****",L"****");
    if (success != TRUE) {
        wprintf(L"%s\n",CkImapW_lastErrorText(imap));
        CkImapW_Dispose(imap);
        return;
    }

    // Select an IMAP mailbox
    success = CkImapW_SelectMailbox(imap,L"Inbox");
    if (success != TRUE) {
        wprintf(L"%s\n",CkImapW_lastErrorText(imap));
        CkImapW_Dispose(imap);
        return;
    }

    // We can choose to fetch UIDs or sequence numbers.
    fetchUids = TRUE;
    // Get the message IDs of all the emails in the mailbox
    messageSet = CkImapW_Search(imap,L"ALL",fetchUids);
    if (CkImapW_getLastMethodSuccess(imap) != TRUE) {
        wprintf(L"%s\n",CkImapW_lastErrorText(imap));
        CkImapW_Dispose(imap);
        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.

    bundle = CkImapW_FetchHeaders(imap,messageSet);
    if (CkImapW_getLastMethodSuccess(imap) != TRUE) {
        CkMessageSetW_Dispose(messageSet);
        wprintf(L"%s\n",CkImapW_lastErrorText(imap));
        CkImapW_Dispose(imap);
        return;
    }

    // Loop over the email objects and display information
    // about each:

    for (i = 0; i <= CkEmailBundleW_getMessageCount(bundle) - 1; i++) {

        email = CkEmailBundleW_GetEmail(bundle,i);

        // Display the From and Subject
        wprintf(L"%s\n",CkEmailW_ck_from(email));
        wprintf(L"%s\n",CkEmailW_subject(email));

        // Display the recipients:

        for (j = 0; j <= CkEmailW_getNumTo(email) - 1; j++) {
            name = CkEmailW_getToName(email,j);
            addr = CkEmailW_getToAddr(email,j);
            wprintf(L"%s, %s\n",name,addr);
        }

        for (j = 0; j <= CkEmailW_getNumCC(email) - 1; j++) {
            name = CkEmailW_getCcName(email,j);
            addr = CkEmailW_getCcAddr(email,j);
            wprintf(L"%s, %s\n",name,addr);
        }

        // Show the total size of the email, including body and attachments:
        wprintf(L"%d\n",CkEmailW_getSize(email));

        // 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:
        numAttach = CkImapW_GetMailNumAttach(imap,email);
        for (j = 0; j <= numAttach - 1; j++) {
            wprintf(L"%s\n",CkImapW_getMailAttachFilename(imap,email,j));
            attachSize = CkImapW_GetMailAttachSize(imap,email,j);
            wprintf(L"    size = %d bytes\n",attachSize);
        }

        wprintf(L"--\n");
        CkEmailW_Dispose(email);
    }

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

    CkMessageSetW_Dispose(messageSet);
    CkEmailBundleW_Dispose(bundle);


    CkImapW_Dispose(imap);

    }