JavaScript

Check if a MIME Part is XML

Demonstrates the Chilkat Mime.IsXml method, which returns true only for text/xml or application/xml. It takes no arguments and applies to the current part.

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: Identifying an XML part matters in machine-to-machine messaging — SOAP, EDI, structured data payloads — where you want to hand the body to an XML parser. Note it matches only the two canonical XML media types and not structured-suffix types like application/xhtml+xml, so check the exact type when those are relevant.

Note

This example is intended for running within a Chilkat.Js embedded JavaScript engine. All Chilkat JavaScript examples require Chilkat v11.4.0 or greater.

JavaScript

var success = false;

//  Demonstrates the Mime.IsXml method, which returns whether the Content-Type is text/xml or application/xml.  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 CkMime();
success = mime.LoadMimeFile("qa_data/multipart_message.eml");
if (success == false) {
    console.log(mime.LastErrorText);
    return;
}

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

    if (part.IsXml()) {
        console.log("Part " + i + " (" + part.ContentType + ") is XML.");
    }

}