Lua

Append Bytes to a Remote FTP File (BinData)

Demonstrates the Chilkat Ftp2.AppendFileBd method, which appends the bytes in a BinData to a remote file. The first argument is the remote filename and the second is the BinData. No conversion is performed.

Background: The binary append: add in-memory bytes to the end of a remote file without an intermediate local file and without any encoding or line-ending translation. It is the right choice for growing a binary file — concatenating captured data, for instance — where exact bytes matter.

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Lua

local chilkat = require("chilkat")

-- Demonstrates the Ftp2.AppendFileBd method, which appends the bytes in a BinData to a remote
-- file.  The 1st argument is the remote filename and the 2nd is the BinData.

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

local bd = chilkat.BinData.new()
success = bd:load_file("qa_data/more_data.bin")
if not success then
    print(bd.last_error_text)
    return
end

success = ftp:append_file_bd("data/collected.bin", bd)
if not success then
    print(ftp.last_error_text)
    return
end

print("Appended " .. bd.num_bytes .. " bytes.")

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