Lua

Restart/Resume FTP Download

See more FTP Examples

Resume downloading a file from an FTP server. Lua

local chilkat = require("chilkat")

-- This example requires the Chilkat API to have been previously unlocked.
-- See Global Unlock Sample for sample code.

local ftp = chilkat.Ftp2.new()

ftp.hostname = "ftp.example.com"
ftp.username = "login"
ftp.password = "password"

-- Connect and login to the FTP server.
local success = ftp:connect()
if not success then
    print(ftp.last_error_text)
    return
end

-- Change to the remote directory where the file is located.
-- This step is only necessary if the file is not in the root directory
-- for the FTP account.
success = ftp:change_remote_dir("temp")
if not success then
    print(ftp.last_error_text)
    return
end

-- To resume a download, it is assumed that the partial file
-- is already present on the local filesystem.
-- You only need to set the RestartNext property to resume
-- the download.  The Chilkat FTP component sets the resume
-- point by getting the existing size of the target (local) file.
ftp.restart_next = true

local localFilename = "big.zip"
local remoteFilename = "big.zip"

-- Resume downloading...
success = ftp:get_file(remoteFilename, localFilename)
if not success then
    print(ftp.last_error_text)
    return
end

success = ftp:disconnect()

print("File Downloaded!")