Restart/Resume FTP Download

Resume downloading a file from an FTP server.

Download Chilkat Perl Module

use chilkat;

$ftp = new chilkat::CkFtp2();

#  Any string unlocks the component for the 1st 30-days.
$success = $ftp->UnlockComponent("Anything for 30-day trial");
if ($success != 1) {
    print $ftp->lastErrorText() . "\n";
    exit;
}

$ftp->put_Hostname("ftp.chilkatsoft.com");
$ftp->put_Username("****");
$ftp->put_Password("****");

#  Connect and login to the FTP server.
$success = $ftp->Connect();
if ($success != 1) {
    print $ftp->lastErrorText() . "\n";
    exit;
}

#  Change to the remote directory where the file is located.
#  This step is only necessary if the file is not in the root directory
#  for the FTP account.
$success = $ftp->ChangeRemoteDir("temp");
if ($success != 1) {
    print $ftp->lastErrorText() . "\n";
    exit;
}

#  To resume a download, it is assumed that the partial file
#  is already present on the local filesystem.
#  You only need to set the RestartNext property to resume
#  the download.  The Chilkat FTP component sets the resume
#  point by getting the existing size of the target (local) file.
$ftp->put_RestartNext(1);

$localFilename = "big.zip";
$remoteFilename = "big.zip";

#  Resume downloading...
$success = $ftp->GetFile($remoteFilename,$localFilename);
if ($success != 1) {
    print $ftp->lastErrorText() . "\n";
    exit;
}

$ftp->Disconnect();

print "File Downloaded!" . "\n";