Файл: qa-include/qa-db-limits.php
Строк: 106
<?php
/*
Question2Answer (c) Gideon Greenspan
http://www.question2answer.org/
File: qa-include/qa-db-limits.php
Version: See define()s at top of qa-include/qa-base.php
Description: Database-level access to tables which monitor rate limits
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
More about this license: http://www.question2answer.org/license.php
*/
if (!defined('QA_VERSION')) { // don't allow this page to be requested directly from browser
header('Location: ../');
exit;
}
function qa_db_limits_get($userid, $ip, $action)
/*
Get rate limit information for $action from the database for user $userid and/or IP address $ip, if they're set.
Return as an array with the limit type in the key, and a labelled array of the period and count.
*/
{
$selects=array();
$arguments=array();
if (isset($userid)) {
$selects[]="(SELECT 'user' AS limitkey, period, count FROM ^userlimits WHERE userid=$ AND action=$)";
$arguments[]=$userid;
$arguments[]=$action;
}
if (isset($ip)) {
$selects[]="(SELECT 'ip' AS limitkey, period, count FROM ^iplimits WHERE ip=COALESCE(INET_ATON($), 0) AND action=$)";
$arguments[]=$ip;
$arguments[]=$action;
}
if (count($selects)) {
$query=qa_db_apply_sub(implode(' UNION ALL ', $selects), $arguments);
return qa_db_read_all_assoc(qa_db_query_raw($query), 'limitkey');
} else
return array();
}
function qa_db_limits_user_add($userid, $action, $period, $count)
/*
Increment the database rate limit count for user $userid and $action by $count within $period
*/
{
qa_db_query_sub(
'INSERT INTO ^userlimits (userid, action, period, count) VALUES ($, $, #, #) '.
'ON DUPLICATE KEY UPDATE count=IF(period=#, count+#, #), period=#',
$userid, $action, $period, $count, $period, $count, $count, $period
);
}
function qa_db_limits_ip_add($ip, $action, $period, $count)
/*
Increment the database rate limit count for IP address $ip and $action by $count within $period
*/
{
qa_db_query_sub(
'INSERT INTO ^iplimits (ip, action, period, count) VALUES (COALESCE(INET_ATON($), 0), $, #, #) '.
'ON DUPLICATE KEY UPDATE count=IF(period=#, count+#, #), period=#',
$ip, $action, $period, $count, $period, $count, $count, $period
);
}
/*
Omit PHP closing tag to help avoid accidental output
*/