(Node.js) Unzip Selected Files from a Zip Archive

Demonstrates how to iterate over the files contained within a .zip and unzip specific files.

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

    var zip = new chilkat.Zip();

    var success = zip.OpenZip("my_files.zip");
    if (success !== true) {
        console.log(zip.LastErrorText);
        return;
    }

    var unzipDir = "/temp/unzipDir";

    var n;

    // Get the number of files and directories in the .zip
    n = zip.NumEntries;
    console.log(n);

    // entry: ZipEntry
    var entry;

    var i;
    for (i = 0; i <= n - 1; i++) {

        entry = zip.GetEntryByIndex(i);
        if (entry.IsDirectory == false) {
            // (the filename may include a path)
            console.log(entry.FileName);

            // Your application may choose to unzip this entry
            // based on the filename.
            // If the entry should be unzipped, then call Extract(unzipDir)
            success = entry.Extract(unzipDir);
            if (success !== true) {
                console.log(entry.LastErrorText);
                return;
            }

        }

    }


}

chilkatExample();