Java

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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import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.Imap;
import com.chilkatsoft.chilkat2.MessageSet;
import com.chilkatsoft.chilkat2.StringBuilder;

public class ChilkatExample {

    public static void main(String[] args) {
        // 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).

        Imap imap = new Imap();

        imap.setSsl(true);
        imap.setPort(993);

        try {
            imap.connect("imap.example.com");

            imap.login("user@example.com", "myPassword");

            imap.selectMailbox("Inbox");
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // Search for the message ids to download, returning UIDs.
        boolean wantUids = true;
        MessageSet msgSet = new MessageSet();
        try {
            imap.queryMbx("ALL", wantUids, msgSet);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        if (msgSet.getCount() > 0) {
            long uid = msgSet.getId(0);

            // Download the message's MIME into a StringBuilder.  The id is a UID.
            boolean useUid = true;
            StringBuilder sbMime = new StringBuilder();
            try {
                imap.fetchSingleAsMimeSb(uid, useUid, sbMime);
            } catch (ChilkatException e) {
                System.out.println(e.getLastErrorText());
                return;
            }

            System.out.println("MIME length: " + sbMime.getLength() + " chars");
        }

        try {
            imap.disconnect();
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }
    }
}