Lua

Count Files in a Remote FTP Directory

Demonstrates the Chilkat Ftp2.GetDirCount method, which returns the number of files and directories in the current remote directory. It takes no arguments; the first call retrieves the listing, and the count reflects the case-insensitive ListPattern filter. A negative return indicates failure.

Background: GetDirCount is the entry point to Chilkat's index-based directory API: its first call fetches the listing for the current directory into a cache, and the returned count establishes the valid index range (0 through count - 1) for the accessor methods that read names, sizes, and attributes. The ListPattern property narrows the listing to matching names before counting, which is how you list, say, only *.html without filtering in your own code.

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Lua

local chilkat = require("chilkat")

-- Demonstrates the Ftp2.GetDirCount method, which returns the number of files and directories in
-- the current remote directory's listing.  It takes no arguments.  The first call retrieves the
-- listing; the count reflects the case-insensitive ListPattern filter.

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

-- Optionally filter the listing with a wildcard pattern.  "*" (the default) matches everything.
ftp.list_pattern = "*.html"

local n = ftp:get_dir_count()
if n < 0 then
    print(ftp.last_error_text)
    return
end

print("Matching entries: " .. n)

-- The count defines the valid index range 0 through n-1 for the indexed accessor methods.
for i = 0, n - 1 do
    local name = ftp:get_filename(i)
    print(name)
end

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