Perl

Get an FTP Listing Entry's Last-Modified Time

Demonstrates the Chilkat Ftp2.GetLastModifiedTimeStr method, which returns the last-modified time of a cached directory-listing entry as an RFC 822 date-time string. The only argument is a zero-based index.

Background: The last-modified time is the workhorse timestamp: it updates whenever a file's contents change and is what sync and mirror logic compares to decide whether a file needs re-transferring. It is the most reliably reported of the three across FTP servers, and the RFC 822 string carries a timezone so comparisons are well defined.

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Perl

use chilkat();

$success = 0;

#  Demonstrates the Ftp2.GetLastModifiedTimeStr method, which returns the last-modified time of a
#  cached directory-listing entry as an RFC 822 date-time string.  The only argument is a
#  zero-based index.

$ftp = chilkat::CkFtp2->new();

$ftp->put_Hostname("ftp.example.com");
$ftp->put_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->put_Password("myPassword");

$success = $ftp->Connect();
if ($success == 0) {
    print $ftp->lastErrorText() . "\r\n";
    exit;
}

$success = $ftp->ChangeRemoteDir("public_html");
if ($success == 0) {
    print $ftp->lastErrorText() . "\r\n";
    exit;
}

#  GetDirCount retrieves the directory listing on the first call and returns the number of
#  entries.  A negative return indicates failure.
$n = $ftp->GetDirCount();
if ($n < 0) {
    print $ftp->lastErrorText() . "\r\n";
    exit;
}

for ($i = 0; $i <= $n - 1; $i++) {
    $name = $ftp->getFilename($i);

    #  The value is an RFC 822 string such as "Fri, 21 Nov 1997 09:55:06 -0600".
    $lastModified = $ftp->getLastModifiedTimeStr($i);
    print $name . "  modified " . $lastModified . "\r\n";
}

$success = $ftp->Disconnect();
if ($success == 0) {
    print $ftp->lastErrorText() . "\r\n";
    exit;
}