Lua

Check FTP Connection and Login Status

Demonstrates the connection-status properties ConnectVerified, LoginVerified, ConnectFailReason, and Greeting.

Background: When Connect fails, these properties separate the possible causes: ConnectVerified shows whether the TCP connection was established at all, LoginVerified whether authentication then succeeded, and ConnectFailReason gives a numeric code pinpointing the failure — far more actionable than a generic error for distinguishing, say, an unreachable host from a bad password. The Greeting captures the server's opening banner, sometimes useful for identifying the server or its policies.

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Lua

local chilkat = require("chilkat")

local ftp = chilkat.Ftp2.new()

ftp.hostname = "ftp.example.com"
ftp.username = "myFtpLogin"

-- 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
    -- ConnectFailReason gives a numeric code describing why Connect failed.
    print("Connect failed, reason code: " .. ftp.connect_fail_reason)
    print(ftp.last_error_text)
    return
end

-- After a successful connect, these flags report what succeeded.
print("TCP connection verified: " .. tostring(ftp.connect_verified))
print("Login verified: " .. tostring(ftp.login_verified))

-- The Greeting property holds the server's initial greeting banner.
print("Server greeting: " .. ftp.greeting)

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