(Node.js) Download a Zip from a URL and OpenBd. (No .zip file is created)

Demonstrates how to download a .zip from a URL, opens the Zip, and gets the contents of a file. No file is ever written.

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 http = new chilkat.Http();

    var bd = new chilkat.BinData();

    // This URL is valid and can be tested...
    var success = http.QuickGetBd("http://chilkatdownload.com/example_data/hamlet.zip",bd);
    if (http.LastMethodSuccess !== true) {
        console.log(http.LastErrorText);
        return;
    }

    var zip = new chilkat.Zip();

    // Open the zip from the bytes contained in bd.
    success = zip.OpenBd(bd);
    if (success == false) {
        console.log(zip.LastErrorText);
        return;
    }

    // Get the entry for the file we want..
    // entry: ZipEntry
    var entry = zip.GetEntryByName("hamlet.xml");
    if (zip.LastMethodSuccess !== true) {
        console.log(zip.LastErrorText);
        return;
    }

    // Convert all line endings to CRLF (if needed)
    var lineEndingBehavior = 2;
    var xmlStr = entry.UnzipToString(lineEndingBehavior,"utf-8");
    if (entry.LastMethodSuccess !== true) {
        console.log(entry.LastErrorText);

        return;
    }

    // The XML in this case is about 274K, so let's just examine the last 20 lines...
    var sb = new chilkat.StringBuilder();
    sb.Append(xmlStr);

    console.log(sb.LastNLines(20,true));


}

chilkatExample();