(Node.js) Gzip Compress In Memory and Base64 Encode

Demonstrates how to Gzip compress in-memory data and then encode the compressed data to base64.

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

var os = require('os');
if (os.platform() == 'win32') {  
    if (os.arch() == 'ia32') {
        var chilkat = require('@chilkat/ck-node21-win-ia32');
    } else {
        var chilkat = require('@chilkat/ck-node21-win64'); 
    }
} else if (os.platform() == 'linux') {
    if (os.arch() == 'arm') {
        var chilkat = require('@chilkat/ck-node21-arm');
    } else if (os.arch() == 'x86') {
        var chilkat = require('@chilkat/ck-node21-linux32');
    } else {
        var chilkat = require('@chilkat/ck-node21-linux64');
    }
} else if (os.platform() == 'darwin') {
    if (os.arch() == 'arm64') {
        var chilkat = require('@chilkat/ck-node21-mac-m1');
    } else {
        var chilkat = require('@chilkat/ck-node21-macosx');
    }
}

function chilkatExample() {

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

    var gzip = new chilkat.Gzip();

    // This example will load a file into the fileData object.
    // Your application might load fileData from other sources..
    var fileData = new chilkat.BinData();
    var success = fileData.LoadFile("qa_data/xml/hamlet.xml");
    if (success !== true) {
        console.log("Failed to load file.");
        return;
    }

    // In-place compress the contents of fileData
    success = gzip.CompressBd(fileData);
    if (success !== true) {
        console.log(gzip.LastErrorText);
        return;
    }

    // Get the base64 encoded compressed data (in a single line).
    var strBase64 = fileData.GetEncoded("base64");
    console.log(strBase64);
    console.log("--------");

    // To get the base64 in multiple lines, as it might appear in MIME,
    // use "base64-mime".
    var strBase64MultiLine = fileData.GetEncoded("base64-mime");
    console.log(strBase64MultiLine);

}

chilkatExample();