(Unicode C) Get IMAP UID from Email Header

Demonstrates how to get the IMAP UID from an email header. After fetching an email or header using IMAP, the UID is contained in the ckx-imap-uid header field.

Chilkat C/C++ Library Downloads
MS Visual C/C++ Linux/CentOS C/C++ Alpine Linux C/C++ MAC OS X C/C++	armhf/aarch64 C/C++ C++ Builder iOS C/C++ Android C/C++	Solaris C/C++ MinGW C/C++

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

void ChilkatSample(void)
    {
    HCkImapW imap;
    BOOL success;
    BOOL fetchUids;
    HCkMessageSetW messageSet;
    HCkEmailBundleW bundle;
    int i;
    int szBundle;
    HCkMessageSetW msOneMsg;
    HCkEmailW email;
    const wchar_t *uidStr;

    // 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"login",L"password");
    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;
    }

    fetchUids = TRUE;
    // Get the message UIDs 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;
    }

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

    // The UID of each fetched email header is available 
    // in the ckx-imap-uid header field.
    i = 0;
    szBundle = CkEmailBundleW_getMessageCount(bundle);
    msOneMsg = CkMessageSetW_Create();
    while (i < szBundle) {
        email = CkEmailBundleW_GetEmail(bundle,i);

        // Build a message set containing one UID
        uidStr = CkEmailW_getHeaderField(email,L"ckx-imap-uid");
        CkMessageSetW_FromCompactString(msOneMsg,uidStr);

        // Move this message to some other folder.
        success = CkImapW_MoveMessages(imap,msOneMsg,L"someOtherFolder");
        if (success != TRUE) {
            wprintf(L"%s\n",CkImapW_lastErrorText(imap));
            // Exit the loop...
            i = szBundle;
        }

        CkEmailW_Dispose(email);
        i = i + 1;
    }

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

    CkMessageSetW_Dispose(messageSet);
    CkEmailBundleW_Dispose(bundle);


    CkImapW_Dispose(imap);
    CkMessageSetW_Dispose(msOneMsg);

    }