#!/usr/bin/perl

use strict;

use warnings;

use POSIX;

use LWP::Simple;

use File::Copy;

use Carp;

my $ipdb     = "GeoLiteCity.dat";

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

my $fullpath = $datadir . $ipdb;

my $url = "http://geolite.maxmind.com/download/geoip/database/GeoLiteCity.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 . "GeoLiteCity.dat.gz" ) ) ) {

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

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

        system( 'gzip', '-d', $datadir . 'GeoLiteCity.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";

}