(Node.js) Unpack HTML Email to Files

Unpacks an HTML email into an HTML file and related files (images and style sheets). The links within the HTML are updated to point to the files unpacked and saved to disk.

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() {

    var email = new chilkat.Email();

    var success;
    success = email.LoadEml("qa_data/eml/happyHour.eml");
    if (success !== true) {
        console.log(email.LastErrorText);
        return;
    }

    // Is this an HTML email?
    if (email.HasHtmlBody() == true) {

        // Unpack the HTML to files.  The image and css URLs
        // in the HTML are modified to point to the files extracted to disk.
        var unpackDir = "qa_output/emails";
        var partsSubdir = "images";
        var htmlFilename = "happyHour.html";
        success = email.UnpackHtml(unpackDir,htmlFilename,partsSubdir);
        if (success !== true) {
            console.log(email.LastErrorText);
            return;
        }

        console.log("Success.");
    }


}

chilkatExample();