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https://github.com/osm-search/Nominatim.git
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59 lines
2.2 KiB
PHP
59 lines
2.2 KiB
PHP
<?php
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require_once('init.php');
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if (CONST_NoAccessControl)
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{
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header("Access-Control-Allow-Origin: *");
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header("Access-Control-Allow-Methods: OPTIONS,GET");
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if (!empty($_SERVER['HTTP_ACCESS_CONTROL_REQUEST_HEADERS']))
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{
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header("Access-Control-Allow-Headers: ".$_SERVER['HTTP_ACCESS_CONTROL_REQUEST_HEADERS']);
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}
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}
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if ($_SERVER['REQUEST_METHOD'] == 'OPTIONS') exit;
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$aBucketKeys = array();
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if (isset($_SERVER["HTTP_REFERER"])) $aBucketKeys[] = str_replace('www.','',strtolower(parse_url($_SERVER["HTTP_REFERER"], PHP_URL_HOST)));
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if (isset($_SERVER["REMOTE_ADDR"])) $aBucketKeys[] = $_SERVER["REMOTE_ADDR"];
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if (isset($_GET["email"])) $aBucketKeys[] = $_GET["email"];
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$fBucketVal = doBucket($aBucketKeys,
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(defined('CONST_ConnectionBucket_PageType')?constant('CONST_ConnectionBucket_Cost_'.CONST_ConnectionBucket_PageType):1) + user_busy_cost(),
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CONST_ConnectionBucket_LeakRate, CONST_ConnectionBucket_BlockLimit);
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if ($fBucketVal > CONST_ConnectionBucket_WaitLimit && $fBucketVal < CONST_ConnectionBucket_BlockLimit)
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{
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$m = getBucketMemcache();
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$iCurrentSleeping = $m->increment('sleepCounter');
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if (false === $iCurrentSleeping)
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{
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$m->add('sleepCounter', 0);
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$iCurrentSleeping = $m->increment('sleepCounter');
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}
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if ($iCurrentSleeping >= CONST_ConnectionBucket_MaxSleeping || isBucketSleeping($aBucketKeys))
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{
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// Too many threads sleeping already. This becomes a hard block.
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$fBucketVal = doBucket($aBucketKeys, CONST_ConnectionBucket_BlockLimit, CONST_ConnectionBucket_LeakRate, CONST_ConnectionBucket_BlockLimit);
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}
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else
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{
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setBucketSleeping($aBucketKeys, true);
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sleep(($fBucketVal - CONST_ConnectionBucket_WaitLimit)/CONST_ConnectionBucket_LeakRate);
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$fBucketVal = doBucket($aBucketKeys, CONST_ConnectionBucket_LeakRate, CONST_ConnectionBucket_LeakRate, CONST_ConnectionBucket_BlockLimit);
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setBucketSleeping($aBucketKeys, false);
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}
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$m->decrement('sleepCounter');
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}
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if (strpos(CONST_BlockedIPs, ','.$_SERVER["REMOTE_ADDR"].',') !== false || $fBucketVal >= CONST_ConnectionBucket_BlockLimit)
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{
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header("HTTP/1.0 429 Too Many Requests");
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echo "Your IP has been blocked. \n";
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echo CONST_BlockMessage;
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exit;
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}
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header('Content-type: text/html; charset=utf-8');
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