(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, 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 ftp = new chilkat.Ftp2();

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

    // Connect to the FTP server.
    var 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();