Lua

Directory Existence Check

See more FTP Examples

How to test if a directory exists on an FTP server.

A good way to check to see if a directory already exists is to try to "cd" to that remote directory by calling ChangeRemoteDir. If it succeeds, then the directory exists. If not, then it does not exist. An alternative method is to set the ListPattern = "*" and then iterate over the files/directories, looking for the directory.

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

-- Does the "temp" directory exist?
local dirExists = ftp:change_remote_dir("/temp")
if dirExists then
    print("Yes, the temp directory exists.")
    --  Yes, it exists. Restore the current remote dir:
    success = ftp:change_remote_dir("..")
    if not success then
        print(ftp.last_error_text)
        return
    end
end

-- Alternatively, you may set the ListPattern = "*" and
--  look for the directory:
ftp.list_pattern = "*"

local n = ftp:get_dir_count()
if n < 0 then
    -- Failed to get directory listing based on ListPattern
    print(ftp.last_error_text)
    return
end

if n > 0 then
    for i = 0, n - 1 do
        local isDir = ftp:get_is_directory(i)
        if isDir then
            local fname = ftp:get_filename(i)
            if fname == "temp" then
                print("Found temp directory!")
                success = ftp:disconnect()
                return
            end
        end
    end
end

success = ftp:disconnect()