Lua

Get an FTP Listing Entry's Size as a String

Demonstrates the Chilkat Ftp2.GetSizeStr method, which returns the size in bytes of a cached directory-listing entry as a decimal string. The only argument is a zero-based index.

Background: Returning the size as text sidesteps integer-width limits entirely, which is useful in languages without a convenient 64-bit type and whenever you only need to display or log the value. Parse the string when you need to do arithmetic on it; otherwise it is ready to print as-is.

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Lua

local chilkat = require("chilkat")

-- Demonstrates the Ftp2.GetSizeStr method, which returns the size in bytes of a cached
-- directory-listing entry as a decimal string.  The only argument is a zero-based index.

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
    print(ftp.last_error_text)
    return
end

success = ftp:change_remote_dir("public_html")
if not success then
    print(ftp.last_error_text)
    return
end

-- GetDirCount retrieves the directory listing on the first call and returns the number of
-- entries.  A negative return indicates failure.
local n = ftp:get_dir_count()
if n < 0 then
    print(ftp.last_error_text)
    return
end

for i = 0, n - 1 do
    local name = ftp:get_filename(i)

    -- The string form avoids integer-size limits in languages without a convenient 64-bit type.
    local fileSize = ftp:get_size_str(i)
    print(name .. "  " .. fileSize .. " bytes")
end

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