Perl

Upload a Large File in Chunks (FTP)

Demonstrates the Chilkat Ftp2.LargeFileUpload method, which uploads a local file as a sequence of transfers, each up to a given chunk size. The arguments are the local path, the remote path, and the chunk size in bytes.

Note: The local paths are relative to the application's current working directory. Absolute paths may also be used. Supply the paths appropriate to your own environment.

Background: Some servers, proxies, or firewalls impose a limit on the size or duration of a single data transfer, which a very large file can exceed. This method sidesteps that by sending the file in pieces — the first with STOR to create or replace the file, each subsequent one appended — so no single transfer is oversized. Choose a chunk size comfortably under whatever limit you are working around.

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Chilkat2 Perl

use strict;
use warnings;
use Chilkat2;

# Demonstrates the Ftp2.LargeFileUpload method, which uploads a local file as a sequence of
# transfers, each up to a given chunk size.  The 1st argument is the local path, the 2nd is the
# remote path, and the 3rd is the chunk size in bytes.

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;
}

# The first chunk is sent with STOR (creating/replacing the remote file); each later chunk is
# appended.  Uploading in chunks can work around server or network limits on a single transfer.
my $chunkSize = 10485760;
$success = $ftp->LargeFileUpload('qa_data/bigfile.zip', 'uploads/bigfile.zip', $chunkSize);
if (!$success) {
    print $ftp->LastErrorText, "\n";
    exit;
}

print "Large file uploaded.\n";

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