Here is a nice use of the "mirror" method, from a post by John Krahn. It handles error messages nicely

#!/usr/bin/perl
use warnings;

&get_web_file;

sub get_web_file {
use Fatal qw(open close);
use LWP::Simple;
use HTTP::Status;

my $URL = 'http://zentara.net/2uni2.jpg';
my $localfile = '2uni2.jpg';

my $rc = mirror( $URL, $localfile );
warn status_message( $rc ) if is_error( $rc );
}
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