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(C) Copy Email from one IMAP Account to Another

Demonstrates how to copy the email in a mailbox from one account to another.

Chilkat C/C++ Library Downloads

MS Visual C/C++

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#include <C_CkImap.h>
#include <C_CkMessageSet.h>
#include <C_CkFileAccess.h>
#include <C_CkStringBuilder.h>

void ChilkatSample(void)
    {
    HCkImap imapSrc;
    BOOL success;
    HCkImap imapDest;
    BOOL fetchUids;
    HCkMessageSet mset;
    HCkFileAccess fac;
    HCkMessageSet msetAlreadyCopied;
    const char *strMsgSet;
    int numUids;
    HCkStringBuilder sbFlags;
    int i;
    int uid;
    const char *flags;
    const char *mimeStr;
    BOOL seen;
    BOOL flagged;
    BOOL answered;
    BOOL draft;

    imapSrc = CkImap_Create();

    //  This example assumes Chilkat Imap to have been previously unlocked.
    //  See Unlock Imap for sample code.

    //  Connect to our source IMAP server.
    CkImap_putSsl(imapSrc,TRUE);
    CkImap_putPort(imapSrc,993);
    success = CkImap_Connect(imapSrc,"MY-IMAP-DOMAIN");
    if (success != TRUE) {
        printf("%s\n",CkImap_lastErrorText(imapSrc));
        CkImap_Dispose(imapSrc);
        return;
    }

    //  Login to the source IMAP server
    success = CkImap_Login(imapSrc,"MY-IMAP-LOGIN","MY-IMAP-PASSWORD");
    if (success != TRUE) {
        printf("%s\n",CkImap_lastErrorText(imapSrc));
        CkImap_Dispose(imapSrc);
        return;
    }

    imapDest = CkImap_Create();

    //  Connect to our destination IMAP server.
    CkImap_putSsl(imapDest,TRUE);
    CkImap_putPort(imapDest,993);
    success = CkImap_Connect(imapDest,"MY-IMAP-DOMAIN2");
    if (success != TRUE) {
        printf("%s\n",CkImap_lastErrorText(imapDest));
        CkImap_Dispose(imapSrc);
        CkImap_Dispose(imapDest);
        return;
    }

    //  Login to the destination IMAP server
    success = CkImap_Login(imapDest,"MY-IMAP-LOGIN2","MY-IMAP-PASSWORD2");
    if (success != TRUE) {
        printf("%s\n",CkImap_lastErrorText(imapDest));
        CkImap_Dispose(imapSrc);
        CkImap_Dispose(imapDest);
        return;
    }

    //  Select a source IMAP mailbox on the source IMAP server
    success = CkImap_SelectMailbox(imapSrc,"Inbox");
    if (success != TRUE) {
        printf("%s\n",CkImap_lastErrorText(imapSrc));
        CkImap_Dispose(imapSrc);
        CkImap_Dispose(imapDest);
        return;
    }

    fetchUids = TRUE;

    //  Get the set of UIDs for all emails on the source server.
    mset = CkImap_Search(imapSrc,"ALL",fetchUids);
    if (CkImap_getLastMethodSuccess(imapSrc) != TRUE) {
        printf("%s\n",CkImap_lastErrorText(imapSrc));
        CkImap_Dispose(imapSrc);
        CkImap_Dispose(imapDest);
        return;
    }

    //  Load the complete set of UIDs that were previously copied.
    //  We dont' want to copy any of these to the destination.
    fac = CkFileAccess_Create();
    msetAlreadyCopied = CkMessageSet_Create();
    strMsgSet = CkFileAccess_readEntireTextFile(fac,"qa_cache/saAlreadyLoaded.txt","utf-8");
    if (CkFileAccess_getLastMethodSuccess(fac) == TRUE) {
        CkMessageSet_FromCompactString(msetAlreadyCopied,strMsgSet);
    }

    numUids = CkMessageSet_getCount(mset);
    sbFlags = CkStringBuilder_Create();

    i = 0;
    while (i < numUids) {

        //  If this UID was not already copied...
        uid = CkMessageSet_GetId(mset,i);
        if (!CkMessageSet_ContainsId(msetAlreadyCopied,uid)) {

            printf("copying %d...\n",uid);

            //  Get the flags.
            flags = CkImap_fetchFlags(imapSrc,uid,TRUE);
            if (CkImap_getLastMethodSuccess(imapSrc) == FALSE) {
                printf("%s\n",CkImap_lastErrorText(imapSrc));
                CkImap_Dispose(imapSrc);
                CkImap_Dispose(imapDest);
                CkFileAccess_Dispose(fac);
                CkMessageSet_Dispose(msetAlreadyCopied);
                CkStringBuilder_Dispose(sbFlags);
                return;
            }

            CkStringBuilder_SetString(sbFlags,flags);

            //  Get the MIME of this email from the source.
            mimeStr = CkImap_fetchSingleAsMime(imapSrc,uid,TRUE);
            if (CkImap_getLastMethodSuccess(imapSrc) == FALSE) {
                printf("%s\n",CkImap_lastErrorText(imapSrc));
                CkImap_Dispose(imapSrc);
                CkImap_Dispose(imapDest);
                CkFileAccess_Dispose(fac);
                CkMessageSet_Dispose(msetAlreadyCopied);
                CkStringBuilder_Dispose(sbFlags);
                return;
            }

            seen = CkStringBuilder_Contains(sbFlags,"\\Seen",FALSE);
            flagged = CkStringBuilder_Contains(sbFlags,"\\Flagged",FALSE);
            answered = CkStringBuilder_Contains(sbFlags,"\\Answered",FALSE);
            draft = CkStringBuilder_Contains(sbFlags,"\\Draft",FALSE);

            success = CkImap_AppendMimeWithFlags(imapDest,"Inbox",mimeStr,seen,flagged,answered,draft);
            if (success != TRUE) {
                printf("%s\n",CkImap_lastErrorText(imapDest));
                CkImap_Dispose(imapSrc);
                CkImap_Dispose(imapDest);
                CkFileAccess_Dispose(fac);
                CkMessageSet_Dispose(msetAlreadyCopied);
                CkStringBuilder_Dispose(sbFlags);
                return;
            }

            //  Update msetAlreadyCopied with the uid just copied.
            CkMessageSet_InsertId(msetAlreadyCopied,uid);

            //  Save at every iteration just in case there's a failure..
            strMsgSet = CkMessageSet_toCompactString(msetAlreadyCopied);
            CkFileAccess_WriteEntireTextFile(fac,"qa_cache/saAlreadyLoaded.txt",strMsgSet,"utf-8",FALSE);
        }

        i = i + 1;
    }

    CkMessageSet_Dispose(mset);

    //  Disconnect from the IMAP servers.
    success = CkImap_Disconnect(imapSrc);
    success = CkImap_Disconnect(imapDest);


    CkImap_Dispose(imapSrc);
    CkImap_Dispose(imapDest);
    CkFileAccess_Dispose(fac);
    CkMessageSet_Dispose(msetAlreadyCopied);
    CkStringBuilder_Dispose(sbFlags);

    }

 

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