lib/init-website.php

   1 <?php
   2         require_once('init.php');
   3         require_once('website.php');
   4
   5         if (CONST_NoAccessControl)
   6         {
   7                 header("Access-Control-Allow-Origin: *");
   8                 header("Access-Control-Allow-Methods: OPTIONS,GET");
   9                 if (!empty($_SERVER['HTTP_ACCESS_CONTROL_REQUEST_HEADERS']))
  10                 {
  11                         header("Access-Control-Allow-Headers: ".$_SERVER['HTTP_ACCESS_CONTROL_REQUEST_HEADERS']);
  12                 }
  13         }
  14         if ($_SERVER['REQUEST_METHOD'] == 'OPTIONS') exit;
  15
  16         $aBucketKeys = array();
  17
  18         if (isset($_SERVER["HTTP_REFERER"])) $aBucketKeys[] = str_replace('www.','',strtolower(parse_url($_SERVER["HTTP_REFERER"], PHP_URL_HOST)));
  19         if (isset($_SERVER["REMOTE_ADDR"])) $aBucketKeys[] = $_SERVER["REMOTE_ADDR"];
  20         if (isset($_GET["email"])) $aBucketKeys[] = $_GET["email"];
  21
  22         $fBucketVal = doBucket($aBucketKeys,
  23                         (defined('CONST_ConnectionBucket_PageType')?constant('CONST_ConnectionBucket_Cost_'.CONST_ConnectionBucket_PageType):1) + user_busy_cost(),
  24                         CONST_ConnectionBucket_LeakRate, CONST_ConnectionBucket_BlockLimit);
  25
  26         if ($fBucketVal > CONST_ConnectionBucket_WaitLimit && $fBucketVal < CONST_ConnectionBucket_BlockLimit)
  27         {
  28                 $m = getBucketMemcache();
  29                 $iCurrentSleeping = $m->increment('sleepCounter');
  30                 if (false === $iCurrentSleeping)
  31                 {
  32                         $m->add('sleepCounter', 0);
  33                         $iCurrentSleeping = $m->increment('sleepCounter');
  34                 }
  35                 if ($iCurrentSleeping >= CONST_ConnectionBucket_MaxSleeping || isBucketSleeping($aBucketKeys))
  36                 {
  37                         // Too many threads sleeping already.  This becomes a hard block.
  38                         $fBucketVal = doBucket($aBucketKeys, CONST_ConnectionBucket_BlockLimit, CONST_ConnectionBucket_LeakRate, CONST_ConnectionBucket_BlockLimit);
  39                 }
  40                 else
  41                 {
  42                         setBucketSleeping($aBucketKeys, true);
  43                         sleep(($fBucketVal - CONST_ConnectionBucket_WaitLimit)/CONST_ConnectionBucket_LeakRate);
  44                         $fBucketVal = doBucket($aBucketKeys, CONST_ConnectionBucket_LeakRate, CONST_ConnectionBucket_LeakRate, CONST_ConnectionBucket_BlockLimit);
  45                         setBucketSleeping($aBucketKeys, false);
  46                 }
  47                 $m->decrement('sleepCounter');
  48         }
  49
  50         if (strpos(CONST_BlockedIPs, ','.$_SERVER["REMOTE_ADDR"].',') !== false || $fBucketVal >= CONST_ConnectionBucket_BlockLimit)
  51         {
  52                 header("HTTP/1.0 429 Too Many Requests");
  53                 echo "Your IP has been blocked. \n";
  54                 echo CONST_BlockMessage;
  55                 exit;
  56         }
  57
  58         header('Content-type: text/html; charset=utf-8');
  59