(Node.js) Controlling Paths of Files Added to Zip

When appending files to a .zip, it can be difficult to get the paths exactly as you want them. This example describes a way that you can control the path information when adding a single file at a time to a .zip.

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();

    // Intialize the zip object by calling NewZip.
    var success = zip.NewZip("myZip.zip");

    // Add a reference to a file on disk to the zip object.
    // (When appending files to a zip, the files are not actually
    // read into memory.  References to the file(s) are added.
    // When WriteZip is called, the referenced files are streamed in
    // and compressed to the .zip.)
    var saveExtraPath = false;
    success = zip.AppendOneFileOrDir("/temp/a/hamlet.xml",saveExtraPath);
    // For brevity, this example will not check the return status...

    // The saveExtraPath argument, if set, will cause the path information
    // passed in the 1st argument to be saved in the .zip.

    // To add "a/hamlet.xml", do this:
    zip.AppendFromDir = "/temp";
    //  The saveExtraPath argument, if set, will cause the path information
    //  passed in the 1st argument to be saved in the .zip.     But the path in AppendFromDir is
    //  not added to that path saved in the .zip.     If there is a path in AppendFromDir then the
    //  path in the 1st argument must be relative, not preceded by a drive or \.
    saveExtraPath = true;
    success = zip.AppendOneFileOrDir("a/hamlet.xml",saveExtraPath);

    // To add "temp/a/hamlet.xml", do this:
    zip.AppendFromDir = "/";
    saveExtraPath = true;
    success = zip.AppendOneFileOrDir("temp/a/hamlet.xml",saveExtraPath);

    // The zip written here will contain hamlet.xml three times,
    // each with a different relative path.
    success = zip.WriteZipAndClose();

}

chilkatExample();