(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, 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 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();