#! /usr/bin/perl
use strict;
use warnings;
use LWP::Simple;

# fetch data from URL
my $content = get( "http://example.org/cgi-bin/whatever.pl" );

# process data into desired structure
my @array = do_your_magic_with(\$content);


# let's assume, that we got a string with whitespace separated values
sub do_your_magic_with {
  my $ref = shift;

  return split m/\s+/, $$ref;
}