Node.js

Check if a MIME Part is an Attachment

Demonstrates the Chilkat Mime.IsAttachment method, which returns whether the current part's Content-Disposition is attachment (matched case-insensitively). It takes no arguments.

Note: The file path is relative to the application's current working directory. Absolute paths may also be used. Supply the path to your own file.

Background: Whether a part is an attachment is about disposition, not content type — an image can be inline (Content-Disposition: inline) or an attachment. This predicate keys off that header, which is the right basis for deciding what to list as a downloadable attachment versus what to render within the message body.

Chilkat Node.js Downloads

Download Chilkat for Node.js

Node.js

NODEJS_PRELUDE

function chilkatExample() {

    var success = false;

    //  Demonstrates the Mime.IsAttachment method, which returns whether the part's Content-Disposition is attachment.  It takes no arguments and applies to the current
    //  part.  This example iterates the parts of a multipart message and reports which ones match.

    var mime = new chilkat.Mime();
    success = mime.LoadMimeFile("qa_data/multipart_message.eml");
    if (success == false) {
        console.log(mime.LastErrorText);
        return;
    }

    var n = mime.NumParts;
    var part = new chilkat.Mime();
    var i;
    for (i = 0; i <= n - 1; i++) {
        success = mime.PartAt(i,part);
        if (success == false) {
            console.log(mime.LastErrorText);
            return;
        }

        if (part.IsAttachment()) {
            console.log("Part " + i + " (" + part.ContentType + ") is an attachment.");
        }

    }


}

chilkatExample();