#!/usr/bin/perl

use strict;

use warnings;

use POSIX;

use LWP::Simple;

use File::Copy;

use Carp;

my $ipdb     = 'GeoIP.dat';

my $datadir  = '/usr/share/GeoIP/';

my $fullpath = $datadir . $ipdb;

my $url      = 'http://geolite.maxmind.com/download/geoip/database/GeoLiteCountry/GeoIP.dat.gz';

my $date     = strftime '%Y%m%d', localtime;

# Do we have an existing IP database?

if ( -e $fullpath ) {

    print "Fetching " . $ipdb . " from " . $url . "\r\n";

    if ( is_success( getstore( $url, $datadir . 'GeoIP.dat.gz' ) ) ) {

        move( $fullpath, $datadir . $ipdb . '.' . $date )

          || croak "Can't move the old database aside\r\n";

        system 'gzip', '-d', $datadir . 'GeoIP.dat.gz';

        if ( $? ne 0 ) {

            croak "Could not uncompress database - exited $?\r\n";

        }

        print "GeoIP database updated. Old copy is at " . $ipdb . "." . $date

          . "\r\n";

    }

    else {

        croak "Fetch failed - try again later?\r\n";

    }

}

else {

    croak "You don't appear to have a valid GeoIP database installed..\r\n";

}