Lua

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.

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Lua

local chilkat = require("chilkat")

local ftp = chilkat.Ftp2.new()

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.auto_feat = true

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

-- AutoOptsUtf8 (default true): send OPTS UTF8 ON when the FEAT response advertises UTF8.
ftp.auto_opts_utf8 = 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.auto_xcrc = 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"

local success = ftp:connect()
if not success then
    print(ftp.last_error_text)
    return
end

print("Connected with the configured automatic features.")

success = ftp:disconnect()
if not success then
    print(ftp.last_error_text)
    return
end