Lua

Log In After ConnectOnly on an FTP Server

Demonstrates the Chilkat Ftp2.LoginAfterConnectOnly method, which authenticates a control connection previously established by ConnectOnly. It takes no arguments, sends USER, PASS, and ACCT when required, then performs normal post-login initialization.

Background: This is the second half of the two-step connect. Beyond sending the credentials, it runs the same post-login setup Connect would — for example issuing TYPE I and any auto-negotiated features — so the session ends up in the same ready state either way. The value of the split is entirely in what you can do in the gap between the two calls.

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Lua

local chilkat = require("chilkat")

-- Demonstrates the Ftp2.LoginAfterConnectOnly method, which authenticates a control connection
-- previously established by ConnectOnly.  It takes no arguments and sends USER, PASS, and (when
-- required) ACCT, then performs normal post-login initialization.

local ftp = chilkat.Ftp2.new()

ftp.hostname = "ftp.example.com"
ftp.port = 21

-- First connect without logging in.
local success = ftp:connect_only()
if not success then
    print(ftp.last_error_text)
    return
end

-- Set credentials (for example, after inspecting the greeting), then log in.
ftp.username = "myFtpLogin"
ftp.password = "myPassword"

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

print("Logged in.")

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