(Node.js) Ungzip Base64 String

Suppose you have a gzip in base64 representation that contains a text file, such as XML. This example shows how to decompress and access the string.

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();

    var gzipBase64 = "H4sIAAAAAAAE ... X6aZjXO3EwAA";

    var bd = new chilkat.BinData();
    var success = bd.AppendEncoded(gzipBase64,"base64");

    success = gzip.UncompressBd(bd);
    if (success !== true) {
        console.log(gzip.LastErrorText);
        return;
    }

    var strXml = bd.GetString("utf-8");
    console.log("XML:");
    console.log(strXml);

}

chilkatExample();