C++

Fetch a Single Message's MIME into a StringBuilder

Demonstrates the Chilkat Imap.FetchSingleAsMimeSb method, which downloads one message's MIME into a StringBuilder. The first argument is the message id, the second (bUid) selects UID vs sequence number, and the third is the StringBuilder, which is cleared first. This example downloads a message by UID and prints the MIME length.

Background: Chilkat interprets the received MIME as UTF-8. Messages using Base64 or quoted-printable transfer encoding are safe because their encoded bytes are ASCII. Raw 8bit or binary content, or unencoded text in a charset such as ISO-8859-1 or Shift_JIS, can be misinterpreted — in those cases use FetchSingleBd to get the exact bytes.

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C++

#include <CkImap.h>
#include <CkMessageSet.h>
#include <CkStringBuilder.h>

void ChilkatSample(void)
    {
    bool success = false;

    //  Demonstrates the Imap.FetchSingleAsMimeSb method, which downloads one message's MIME into a
    //  StringBuilder.  The 1st argument is the message id, the 2nd (bUid) selects UID vs sequence
    //  number, and the 3rd is the StringBuilder (cleared first).

    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;
    }

    success = imap.Login("user@example.com","myPassword");
    if (success == false) {
        std::cout << imap.lastErrorText() << "\r\n";
        return;
    }

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

    //  Search for the message ids to download, returning UIDs.
    bool wantUids = true;
    CkMessageSet msgSet;
    success = imap.QueryMbx("ALL",wantUids,msgSet);
    if (success == false) {
        std::cout << imap.lastErrorText() << "\r\n";
        return;
    }

    if (msgSet.get_Count() > 0) {
        unsigned long uid = msgSet.GetId(0);

        //  Download the message's MIME into a StringBuilder.  The id is a UID.
        bool useUid = true;
        CkStringBuilder sbMime;
        success = imap.FetchSingleAsMimeSb(uid,useUid,sbMime);
        if (success == false) {
            std::cout << imap.lastErrorText() << "\r\n";
            return;
        }

        std::cout << "MIME length: " << sbMime.get_Length() << " chars" << "\r\n";
    }

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