(Node.js) Add Content-Length Header to a MIME Message

The AddContentLength method automatically computes the length of the MIME content and adds a Content-Length header with the correct number of bytes.

Install Chilkat for Node.js and Electron using npm at Chilkat npm packages for Node.js Chilkat npm packages for Electron on Windows, Linux, MacOS

var os = require('os');
if (os.platform() == 'win32') {  
  var chilkat = require('@chilkat/ck-node23-win64'); 
} else if (os.platform() == 'linux') {
    if (os.arch() == 'arm') {
        var chilkat = require('@chilkat/ck-node23-linux-arm');
    } else if (os.arch() == 'arm64') {
        var chilkat = require('@chilkat/ck-node23-linux-arm64');
    } else {
        var chilkat = require('@chilkat/ck-node23-linux-x64');
    }
} else if (os.platform() == 'darwin') {
  var chilkat = require('@chilkat/ck-node23-mac-universal');
}

function chilkatExample() {

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

    var mime = new chilkat.Mime();

    // Set the MIME body:
    mime.SetBody("This is a test");

    // The complete size (in bytes) of the contents is computed, 
    // even if the MIME is multipart, and the Content-Length header
    // is added.
    mime.AddContentLength();

    // Display the MIME:
    console.log(mime.GetMime());

}

chilkatExample();