(Node.js) Append to Existing File on FTP Server

Uploads a file to the FTP server. If the remote file (on the FTP server) does not already exist, it is created. Otherwise the uploaded file is appended to the remote file.

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-node11-win-ia32');
    } else {
        var chilkat = require('@chilkat/ck-node11-win64'); 
    }
} else if (os.platform() == 'linux') {
    if (os.arch() == 'arm') {
        var chilkat = require('@chilkat/ck-node11-arm');
    } else if (os.arch() == 'x86') {
        var chilkat = require('@chilkat/ck-node11-linux32');
    } else {
        var chilkat = require('@chilkat/ck-node11-linux64');
    }
} else if (os.platform() == 'darwin') {
    var chilkat = require('@chilkat/ck-node11-macosx');
}

function chilkatExample() {

    var ftp = new chilkat.Ftp2();

    var success;

    // Any string unlocks the component for the 1st 30-days.
    success = ftp.UnlockComponent("Anything for 30-day trial");
    if (success !== true) {
        console.log(ftp.LastErrorText);
        return;
    }

    ftp.Hostname = "ftp.myftpserver.com";
    ftp.Username = "myUsername";
    ftp.Password = "myPassword";

    // Connect to the FTP server.
    success = ftp.ConnectOnly();
    if (success !== true) {
        console.log(ftp.LastErrorText);
        return;
    }

    // Authenticate with the FTP server.
    success = ftp.LoginAfterConnectOnly();
    if (success !== true) {
        console.log(ftp.LastErrorText);
        return;
    }

    var localFilePath = "/someDirectory/hamlet.xml";
    var remoteFilename = "hamlet.xml";

    // Upload to the FTP server, creating the file if it does not yet exist
    // on the FTP server, or appending to the remote file if it already exists.
    success = ftp.AppendFile(localFilePath,remoteFilename);
    if (success !== true) {
        console.log(ftp.LastErrorText);
        return;
    }

    ftp.Disconnect();

    console.log("Success.");

}

chilkatExample();