Node.js

Iterate MIME Parts of an Email

See more Email Object Examples

Demonstrates how to iterate over the MIME sub-parts of an email, and retrieve the content of each MIME sub-part body.

Note: This example requires some new features added to Chilkat v9.5.0.95.

Node.js

NODEJS_PRELUDE

function chilkatExample() {

    var success = false;

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

    // See the following Chilkat post to Quickly Understand Email MIME

    var email = new chilkat.Email();

    success = email.LoadEml("qa_data/eml/sample.eml");
    if (success == false) {
        console.log("Failed to load .eml");
        return;
    }

    var sbContentType = new chilkat.StringBuilder();
    var caseSensitive = false;

    // Get the total number of non-multipart MIME sub-parts.
    // (This is a simple way of iterating over all the MIME leaf parts regardless of the MIME tree structure)
    var inlineOnly = false;
    var excludeAttachments = false;
    var searchSpec = "*/*";

    var numParts = email.GetNumPartsOfType(searchSpec,inlineOnly,excludeAttachments);
    var i = 0;
    while (i < numParts) {
        // What is the Content-Type of this MIME part?
        sbContentType.Append(email.GetNthContentType(i,searchSpec,inlineOnly,excludeAttachments));
        if (sbContentType.StartsWith("text/",caseSensitive) == true) {
            // Get the text body of this MIME part.
            var textBody = email.GetNthTextPartOfType(i,searchSpec,inlineOnly,excludeAttachments);
            console.log("Got text body for " + sbContentType.GetAsString());
        }
        else {
            if (sbContentType.ContentsEqual("message/rfc822",caseSensitive) == true) {
                // If the Content-Type is message/rfc822, then the MIME body for this part contains a full embedded MIME messages.
                // Your application could load it into a Chilkat email object and recursively process...
                var attachedEmail = new chilkat.Email();
                var bdMime = new chilkat.BinData();
                email.GetNthBinaryPartOfTypeBd(i,searchSpec,inlineOnly,excludeAttachments,bdMime);
                attachedEmail.SetFromMimeBd(bdMime);
                // Now your app can recursively process the attachedEmail...
            }
            else {
                // Get the bytes of this MIME body part.
                var bd = new chilkat.BinData();
                email.GetNthBinaryPartOfTypeBd(i,searchSpec,inlineOnly,excludeAttachments,bd);
                console.log("Got binary body for " + sbContentType.GetAsString() + " numBytes = " + bd.NumBytes);
            }

        }

        sbContentType.Clear();
        i = i+1;
    }


}

chilkatExample();