JavaScript

FTP Automatic Post-Connect Commands

Demonstrates the AutoFeat, AutoSyst, AutoOptsUtf8, and AutoXcrc properties, which control commands Chilkat issues automatically around connecting and transferring.

Background: Chilkat normally probes and adapts to a server on its own: AutoFeat discovers capabilities with FEAT, AutoSyst learns the OS type to parse legacy listings, and AutoOptsUtf8 enables UTF-8 filenames when the server advertises it. These are on by default and rarely worth changing. AutoXcrc is the exception worth enabling deliberately — it verifies each upload with the server's XCRC checksum, catching corruption automatically where supported.

Note

This example is intended for running within a Chilkat.Js embedded JavaScript engine. All Chilkat JavaScript examples require Chilkat v11.4.0 or greater.

JavaScript

var success = false;

var ftp = new CkFtp2();

ftp.Hostname = "ftp.example.com";
ftp.Username = "myFtpLogin";

//  These auto-* properties control commands Chilkat sends automatically after connecting.  They
//  are on/off by default as noted, and are rarely changed.

//  AutoFeat (default true): automatically send FEAT to discover server capabilities.
ftp.AutoFeat = true;

//  AutoSyst (default true): automatically send SYST after login to learn the server OS type.
ftp.AutoSyst = true;

//  AutoOptsUtf8 (default true): send OPTS UTF8 ON when the FEAT response advertises UTF8.
ftp.AutoOptsUtf8 = true;

//  AutoXcrc (default false): request an XCRC checksum after each upload and treat a mismatch as
//  a failure, giving automatic post-upload verification where the server supports XCRC.
ftp.AutoXcrc = true;

//  Normally you would not hard-code the password in source.  You should instead obtain it
//  from an interactive prompt, environment variable, or a secrets vault.
ftp.Password = "myPassword";

success = ftp.Connect();
if (success == false) {
    console.log(ftp.LastErrorText);
    return;
}

console.log("Connected with the configured automatic features.");

success = ftp.Disconnect();
if (success == false) {
    console.log(ftp.LastErrorText);
    return;
}