Node.js

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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Node.js

NODEJS_PRELUDE

function chilkatExample() {

    var 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).

    var imap = new chilkat.Imap();

    imap.Ssl = true;
    imap.Port = 993;

    success = imap.Connect("imap.example.com");
    if (success == false) {
        console.log(imap.LastErrorText);
        return;
    }

    success = imap.Login("user@example.com","myPassword");
    if (success == false) {
        console.log(imap.LastErrorText);
        return;
    }

    success = imap.SelectMailbox("Inbox");
    if (success == false) {
        console.log(imap.LastErrorText);
        return;
    }

    //  Search for the message ids to download, returning UIDs.
    var wantUids = true;
    var msgSet = new chilkat.MessageSet();
    success = imap.QueryMbx("ALL",wantUids,msgSet);
    if (success == false) {
        console.log(imap.LastErrorText);
        return;
    }

    if (msgSet.Count > 0) {
        var uid = msgSet.GetId(0);

        //  Download the message's MIME into a StringBuilder.  The id is a UID.
        var useUid = true;
        var sbMime = new chilkat.StringBuilder();
        success = imap.FetchSingleAsMimeSb(uid,useUid,sbMime);
        if (success == false) {
            console.log(imap.LastErrorText);
            return;
        }

        console.log("MIME length: " + sbMime.Length + " chars");
    }

    success = imap.Disconnect();
    if (success == false) {
        console.log(imap.LastErrorText);
        return;
    }


}

chilkatExample();