lib/init-website.php

   1 <?php
   2         require_once('init.php');
   3
   4         if (CONST_NoAccessControl)
   5         {
   6                 header("Access-Control-Allow-Origin: *");
   7                 header("Access-Control-Allow-Methods: OPTIONS,GET");
   8                 if (!empty($_SERVER['HTTP_ACCESS_CONTROL_REQUEST_HEADERS']))
   9                 {
  10                         header("Access-Control-Allow-Headers: ".$_SERVER['HTTP_ACCESS_CONTROL_REQUEST_HEADERS']);
  11                 }
  12         }
  13         if ($_SERVER['REQUEST_METHOD'] == 'OPTIONS') exit;
  14
  15         $aBucketKeys = array();
  16
  17         if (isset($_SERVER["HTTP_REFERER"])) $aBucketKeys[] = str_replace('www.','',strtolower(parse_url($_SERVER["HTTP_REFERER"], PHP_URL_HOST)));
  18         if (isset($_SERVER["REMOTE_ADDR"])) $aBucketKeys[] = $_SERVER["REMOTE_ADDR"];
  19         if (isset($_GET["email"])) $aBucketKeys[] = $_GET["email"];
  20
  21         $fBucketVal = doBucket($aBucketKeys,
  22                         (defined('CONST_ConnectionBucket_PageType')?constant('CONST_ConnectionBucket_Cost_'.CONST_ConnectionBucket_PageType):1) + user_busy_cost(),
  23                         CONST_ConnectionBucket_LeakRate, CONST_ConnectionBucket_BlockLimit);
  24
  25         if ($fBucketVal > CONST_ConnectionBucket_WaitLimit && $fBucketVal < CONST_ConnectionBucket_BlockLimit)
  26         {
  27                 $m = getBucketMemcache();
  28                 $iCurrentSleeping = $m->increment('sleepCounter');
  29                 if (false === $iCurrentSleeping)
  30                 {
  31                         $m->add('sleepCounter', 0);
  32                         $iCurrentSleeping = $m->increment('sleepCounter');
  33                 }
  34                 if ($iCurrentSleeping >= CONST_ConnectionBucket_MaxSleeping || isBucketSleeping($aBucketKeys))
  35                 {
  36                         // Too many threads sleeping already.  This becomes a hard block.
  37                         $fBucketVal = doBucket($aBucketKeys, CONST_ConnectionBucket_BlockLimit, CONST_ConnectionBucket_LeakRate, CONST_ConnectionBucket_BlockLimit);
  38                 }
  39                 else
  40                 {
  41                         setBucketSleeping($aBucketKeys, true);
  42                         sleep(($fBucketVal - CONST_ConnectionBucket_WaitLimit)/CONST_ConnectionBucket_LeakRate);
  43                         $fBucketVal = doBucket($aBucketKeys, CONST_ConnectionBucket_LeakRate, CONST_ConnectionBucket_LeakRate, CONST_ConnectionBucket_BlockLimit);
  44                         setBucketSleeping($aBucketKeys, false);
  45                 }
  46                 $m->decrement('sleepCounter');
  47         }
  48
  49         if (strpos(CONST_BlockedIPs, ','.$_SERVER["REMOTE_ADDR"].',') !== false || $fBucketVal >= CONST_ConnectionBucket_BlockLimit)
  50         {
  51                 header("HTTP/1.0 429 Too Many Requests");
  52                 echo "Your IP has been blocked. \n";
  53                 echo CONST_BlockMessage;
  54                 exit;
  55         }
  56
  57         header('Content-type: text/html; charset=utf-8');
  58