Perl

Get a Remote FTP File's Size by Name as a String

Demonstrates the Chilkat Ftp2.GetSizeStrByName method, which returns the size in bytes of a named file in the current remote directory as a decimal string. The only argument is the filename.

Background: Returning the size as text avoids integer-width limits entirely, so this is the safe choice for a file of any size and for languages without a convenient large-integer type. Like the other by-name lookups it takes a bare filename in the current directory; parse the string when you need arithmetic, or use it directly for display.

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use strict;
use warnings;
use Chilkat2;

# Demonstrates the Ftp2.GetSizeStrByName method, which returns the size in bytes of a named file
# in the current remote directory as a decimal string.  The only argument is the filename.

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;
}

# The string form avoids integer-size limits, so it is safe for files of any size.
my $fileSize = $ftp->GetSizeStrByName('bigfile.zip');
if (!$ftp->LastMethodSuccess) {
    print $ftp->LastErrorText, "\n";
    exit;
}

print 'bigfile.zip is ', $fileSize, " bytes\n";

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