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// read the latest iplists version

$version_url = ‘http://www.iplists.com/nw/version.php’;

$latest_version = mysql_escape_string(file_get_contents($version_url));

// if no updated version information was retrieved, abort

if (!$latest_version)

{

// return false to indicate an update wasn’t performed

return false;

}

// save the update data

$q = “DELETE FROM cloak_update”;

mysql_query($q);

$q = “INSERT INTO cloak_update (version, updated_on) “ .

“VALUES(‘$latest_version’, NOW())“;

mysql_query($q);

// if we already have the current data, don’t attempt an update

if ($latest_version == $db_version)

{

// close database connection

mysql_close($dbLink);

// return false to indicate an update wasn’t performed

return false;

}

// update the database

SimpleCloak::_updateCloakingDB(‘google’,

‘http://www.iplists.com/nw/google.txt’);

SimpleCloak::_updateCloakingDB(‘yahoo’,

‘http://www.iplists.com/nw/inktomi.txt’);

SimpleCloak::_updateCloakingDB(‘msn’,

‘http://www.iplists.com/nw/msn.txt’);

SimpleCloak::_updateCloakingDB(‘ask’,

‘http://www.iplists.com/nw/askjeeves.txt’);

SimpleCloak::_updateCloakingDB(‘altavista’,

‘http://www.iplists.com/nw/altavista.txt’);

SimpleCloak::_updateCloakingDB(‘lycos’,

‘http://www.iplists.com/nw/lycos.txt’);

SimpleCloak::_updateCloakingDB(‘wisenut’,

‘http://www.iplists.com/nw/wisenut.txt’);

// close connection

mysql_close($dbLink);

// return true to indicate a successful update

return true;

}

// update the database for the mentioned spider, by reading the provided URL

function _updateCloakingDB($spider_name, $url,

$ua_regex = ‘/^# UA “(.*)“$/m’, $ip_regex = ‘/^([0-9.]+)$/m’)

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Chapter 11: Cloaking, Geo-Targeting, and IP Delivery

c11.qxd:c11 11:01 228

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