(Node.js) Parsing a Multipart/Digest Email

This example demonstrates how to parse a multipart/digest email. An email parsed by this sample could have a MIME structure as follows:

multipart/mixed
    text/plain
    text/plain
    multipart/digest
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
        message/rfc822
    text/plain

Install Chilkat for Node.js and Electron using npm at Chilkat npm packages for Node.js Chilkat npm packages for Electron on Windows, Linux, MacOSX, and ARM

var os = require('os');
if (os.platform() == 'win32') {  
    if (os.arch() == 'ia32') {
        var chilkat = require('@chilkat/ck-node21-win-ia32');
    } else {
        var chilkat = require('@chilkat/ck-node21-win64'); 
    }
} else if (os.platform() == 'linux') {
    if (os.arch() == 'arm') {
        var chilkat = require('@chilkat/ck-node21-arm');
    } else if (os.arch() == 'x86') {
        var chilkat = require('@chilkat/ck-node21-linux32');
    } else {
        var chilkat = require('@chilkat/ck-node21-linux64');
    }
} else if (os.platform() == 'darwin') {
    if (os.arch() == 'arm64') {
        var chilkat = require('@chilkat/ck-node21-mac-m1');
    } else {
        var chilkat = require('@chilkat/ck-node21-macosx');
    }
}

function chilkatExample() {

    // Note: This example requires Chilkat v9.5.0.66 or greater.

    var emlPath = "qa_data/eml/multipart_digest.eml";

    var email = new chilkat.Email();

    // For this example, we'll load the email from a .eml.
    // The email could alternatively be loaded as a result of downloading from an IMAP or POP3 server..

    var success = email.LoadEml(emlPath);
    if (success !== true) {
        console.log(email.LastErrorText);
        return;
    }

    var numDigests = email.NumDigests;
    console.log("num digests = " + numDigests);

    var i = 0;
    while (i < numDigests) {
        // eDigest: Email
        var eDigest = email.GetDigest(i);
        console.log(i + ":" + eDigest.FromAddress + ", " + eDigest.Subject);
        var m = eDigest.GetHeaderField("Message");
        if (eDigest.LastMethodSuccess == true) {
            console.log("    Message = " + m);
        }

        i = i+1;
    }


}

chilkatExample();