Perl

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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use strict;
use warnings;
use Chilkat2;

# 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.

my $ftp = Chilkat2::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');

my $success = $ftp->Connect();
if (!$success) {
    print $ftp->LastErrorText, "\n";
    exit;
}

$success = $ftp->ChangeRemoteDir('public_html');
if (!$success) {
    print $ftp->LastErrorText, "\n";
    exit;
}

# Optionally filter the listing with a wildcard pattern.  "*" (the default) matches everything.
$ftp->ListPattern('*.html');

my $n = $ftp->GetDirCount();
if ($n < 0) {
    print $ftp->LastErrorText, "\n";
    exit;
}

print 'Matching entries: ', $n, "\n";

# The count defines the valid index range 0 through n-1 for the indexed accessor methods.
for my $i (0 .. $n - 1) {
    my $name = $ftp->GetFilename($i);
    print $name, "\n";
}

$success = $ftp->Disconnect();
if (!$success) {
    print $ftp->LastErrorText, "\n";
    exit;
}