Node.js

Load .eml and Examine the Structure, Attachments, and Related Items

See more Email Object Examples

Demonstrates how to load examine the MIME structure of a .eml, and also examine the attachment and related item filenames, attached messages, and multipart/report and DSN information. Node.js

NODEJS_PRELUDE

function chilkatExample() {

    var success = false;

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

    var emlPath = "C:/AAWorkarea/beatrix/roesner.eml";

    var mime = new chilkat.Mime();

    success = mime.LoadMimeFile(emlPath);
    if (success == false) {
        console.log(mime.LastErrorText);
        return;
    }

    console.log("---- MIME structure ----");
    console.log(mime.GetStructure("text"));
    console.log("------------------------");

    var email = new chilkat.Email();
    success = email.LoadEml(emlPath);

    // Was this a signed and/or encrypted email?
    // If so, then loading the .eml automatically unwraps
    // (i.e. verifies signatures and decrypts) and the resultant
    // email is what existed prior to signing/encrypting.
    console.log("Email was Signed: " + email.ReceivedSigned);
    console.log("Email was Encrypted: " + email.ReceivedEncrypted);
    if (email.ReceivedSigned == true) {
        console.log("Signature(s) valid = " + email.SignaturesValid);
    }

    if (email.ReceivedEncrypted == true) {
        console.log("Decrypted successfully = " + email.Decrypted);
    }

    var i = 0;
    var numAttach = email.NumAttachments;
    console.log("Number of attachments = " + numAttach);

    while (i < numAttach) {
        console.log("---- Attachment " + i);

        // Examine the filename (if any)
        console.log("filename: " + email.GetAttachmentFilename(i));
        // Examine the content-ID (if any)
        console.log("Content-ID: " + email.GetAttachmentContentID(i));
        // Examine the content-type
        console.log("Content-Type: " + email.GetAttachmentContentType(i));
        // Examine the content-disposition
        console.log("Content-Disposition" + email.GetAttachmentHeader(i,"content-disposition"));
        // Examine the attachment size:
        console.log("Size (in bytes) of the attachment: " + email.GetAttachmentSize(i));

        i = i+1;
    }

    console.log("--");

    // Now for the related items.

    // Note: A MIME sub-part can potentially be both a related item AND an attachment.
    // The typical case is when the item is contained under the multipart/related enclosure and 
    // the item also has a "Content-Disposition" header indicating "attachment".
    // The location within multipart/related makes it a "related item", yet the Content-Disposition can also make it semantically an attachment.
    // Related items and attachments are not necessarily mutually exclusive.

    var numRelated = email.NumRelatedItems;
    console.log("Number of related items = " + numRelated);
    i = 0;
    while (i < numRelated) {
        console.log("---- Related Item " + i);

        // Examine the filename (if any)
        console.log("filename: " + email.GetRelatedFilename(i));
        // Examine the content-ID (if any)
        console.log("Content-ID: " + email.GetRelatedContentID(i));
        // Examine the content-type
        console.log("Content-Type: " + email.GetRelatedContentType(i));
        // Examine the content-location (if any)
        console.log("Content-Location" + email.GetRelatedContentLocation(i));

        i = i+1;
    }

    // The email could also have attached messages.
    // An attached message is another email that was attached to this email.
    var em = new chilkat.Email();
    var numAttachedMessages = email.NumAttachedMessages;
    console.log("Number of attached messages = " + numAttachedMessages);
    i = 0;
    while (i < numAttachedMessages) {
        console.log("---- Attached message " + i);

        // Examine the attached email
        email.GetAttachedEmail(i,em);
        console.log("from: " + em.From);
        console.log("subject: " + em.Subject);
        i = i+1;
    }

    // An email could also be a multipart/report email. 
    // This is a DSN (Delivery Status Notification)
    // The NumReports property indicates how many "reports" exist.
    var numReports = email.NumReports;
    console.log("Number of reports = " + numReports);
    i = 0;
    while (i < numReports) {
        console.log("---- Report " + i);
        // Get the raw report data...
        console.log(email.GetReport(i));
        i = i+1;
    }

    // If the email is a multipart/report, then the information
    // from the message/delivery-status part of the email can be retrieved:
    if (email.IsMultipartReport() == true) {

        console.log("--- Delivery Status Information:");
        console.log("Status: " + email.GetDeliveryStatusInfo("Status"));
        console.log("Action: " + email.GetDeliveryStatusInfo("Action"));
        console.log("Reporting-MTA: " + email.GetDeliveryStatusInfo("Reporting-MTA"));

        var jsonDsnInfo = new chilkat.JsonObject();
        email.GetDsnInfo(jsonDsnInfo);
        jsonDsnInfo.EmitCompact = false;
        console.log(jsonDsnInfo.Emit());
    }


}

chilkatExample();