JavaScript

Check if a MIME Part is Plain Text

Demonstrates the Chilkat Mime.IsPlainText method, which returns whether the Content-Type is exactly text/plain. 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: Inside a multipart/alternative, this is how you pick out the plain-text rendering — the fallback to show when HTML cannot be displayed, or the version to index for search. It is the specific counterpart to IsHtml.

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.IsPlainText method, which returns whether the Content-Type is text/plain.  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.IsPlainText()) {
        console.log("Part " + i + " (" + part.ContentType + ") is plain text.");
    }

}