s3-listall_callback.pl

#!/usr/bin/env perl

use v5.10;
use Paws;

my $bucket = $ARGV[0] or die "Usage $0 bucket\n";

my $s3 = Paws->service('S3', region => 'eu-west-1');

my $res = $s3->ListAllObjects(sub {
    my $object = shift;
    my $type = shift;
    say $object->Key, ' ', $type;
  },
  Bucket => $bucket
);