Scan for Emails with Attachments and Save Attachments to Files

index.js

var os = require('os');
if (os.platform() == 'win32') {  
    if (os.arch() == 'ia32') {
        var chilkat = require('@chilkat/ck-node11-win-ia32');
    } else {
        var chilkat = require('@chilkat/ck-node11-win64'); 
    }
} else if (os.platform() == 'linux') {
    if (os.arch() == 'arm') {
        var chilkat = require('@chilkat/ck-node11-arm');
    } else if (os.arch() == 'x86') {
        var chilkat = require('@chilkat/ck-node11-linux32');
    } else {
        var chilkat = require('@chilkat/ck-node11-linux64');
    }
} else if (os.platform() == 'darwin') {
    var chilkat = require('@chilkat/ck-node11-macosx');
}

function chilkatExample() {

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    var imap = new chilkat.Imap();

    // Connect to an IMAP server.
    // Use TLS
    imap.Ssl = true;
    imap.Port = 993;
    var success = imap.Connect("imap.someMailServer.com");
    if (success !== true) {
        console.log(imap.LastErrorText);
        return;
    }

    // Login
    success = imap.Login("myLogin","myPassword");
    if (success !== true) {
        console.log(imap.LastErrorText);
        return;
    }

    // Select an IMAP mailbox
    success = imap.SelectMailbox("Inbox");
    if (success !== true) {
        console.log(imap.LastErrorText);
        return;
    }

    // messageSet: MessageSet
    var messageSet;
    // We can choose to fetch UIDs or sequence numbers.
    var fetchUids = true;

    // Get the message IDs of all the emails in the mailbox
    messageSet = imap.Search("ALL",fetchUids);
    if (imap.LastMethodSuccess !== true) {
        console.log(imap.LastErrorText);
        return;
    }

    // Fetch the email headers into a bundle object:
    // bundle: EmailBundle
    var bundle;
    bundle = imap.FetchHeaders(messageSet);
    if (imap.LastMethodSuccess !== true) {

        console.log(imap.LastErrorText);
        return;
    }

    // Scan for emails with attachments, and save the attachments
    // to a sub-directory.
    var i;
    for (i = 0; i <= bundle.MessageCount - 1; i++) {
        // email: Email
        var email;
        email = bundle.GetEmail(i);

        // Does this email have attachments?
        // Use GetMailNumAttach because the attachments
        // are not actually in the email object because
        // we only downloaded headers.
        // (Had we downloaded the full emails by
        // calling mailman.FetchBundle, we could look
        // at the email object's NumAttachments property.)
        var numAttach = imap.GetMailNumAttach(email);

        if (numAttach > 0) {
            // Download the entire email and save the
            // attachments. (Remember, we 
            // need to download the entire email because
            // only the headers were previously downloaded.
            // If the entire emails were downloaded by
            // calling FetchBundle instead of FetchHeaders,
            // this would not be necessary.

            // The ckx-imap-uid header field is added when
            // headers are downloaded.  This makes it possible
            // to get the UID from the email object.
            var uidStr = email.GetHeaderField("ckx-imap-uid");
            var uid = uidStr;

            // fullEmail: Email
            var fullEmail;
            fullEmail = imap.FetchSingle(uid,true);
            if (!(fullEmail == null )) {
                success = fullEmail.SaveAllAttachments("attachmentsDir");

            }

            var j;
            for (j = 0; j <= numAttach - 1; j++) {
                var filename = imap.GetMailAttachFilename(email,j);
                console.log(filename);
            }

        }

    }

    // Disconnect from the IMAP server.
    success = imap.Disconnect();


}

chilkatExample();