(Perl) Restart/Resume FTP Download

Resume downloading a file from an FTP server.

Chilkat Perl Downloads Perl Module for Windows, MacOS, Linux, Alpine Linux, Solaris

use chilkat();

# This example requires the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

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

$ftp->put_Hostname("ftp.example.com");
$ftp->put_Username("login");
$ftp->put_Password("password");

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

$success = $ftp->Disconnect();

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