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 ($_SERVER['REQUEST_METHOD'] == 'OPTIONS') exit;
  14
  15         if (CONST_ClosedForIndexing && strpos(CONST_ClosedForIndexingExceptionIPs, ','.$_SERVER["REMOTE_ADDR"].',') === false)
  16         {
  17                 echo "Closed for re-indexing...";
  18                 exit;
  19         }
  20
  21         $aBucketKeys = array();
  22
  23         if (isset($_SERVER["HTTP_REFERER"])) $aBucketKeys[] = str_replace('www.','',strtolower(parse_url($_SERVER["HTTP_REFERER"], PHP_URL_HOST)));
  24         if (isset($_SERVER["REMOTE_ADDR"])) $aBucketKeys[] = $_SERVER["REMOTE_ADDR"];
  25         if (isset($_GET["email"])) $aBucketKeys[] = $_GET["email"];
  26
  27         $fBucketVal = doBucket($aBucketKeys,
  28                         (defined('CONST_ConnectionBucket_PageType')?constant('CONST_ConnectionBucket_Cost_'.CONST_ConnectionBucket_PageType):1) + user_busy_cost(),
  29                         CONST_ConnectionBucket_LeakRate, CONST_ConnectionBucket_BlockLimit);
  30
  31         if ($fBucketVal > CONST_ConnectionBucket_WaitLimit && $fBucketVal < CONST_ConnectionBucket_BlockLimit)
  32         {
  33                 $m = getBucketMemcache();
  34                 $iCurrentSleeping = $m->increment('sleepCounter');
  35                 if (false === $iCurrentSleeping)
  36                 {
  37                         $m->add('sleepCounter', 0);
  38                         $iCurrentSleeping = $m->increment('sleepCounter');
  39                 }
  40                 if ($iCurrentSleeping >= CONST_ConnectionBucket_MaxSleeping || isBucketSleeping($aBucketKeys))
  41                 {
  42                         // Too many threads sleeping already.  This becomes a hard block.
  43                         $fBucketVal = doBucket($aBucketKeys, CONST_ConnectionBucket_BlockLimit, CONST_ConnectionBucket_LeakRate, CONST_ConnectionBucket_BlockLimit);
  44                 }
  45                 else
  46                 {
  47                         setBucketSleeping($aBucketKeys, true);
  48                         sleep(($fBucketVal - CONST_ConnectionBucket_WaitLimit)/CONST_ConnectionBucket_LeakRate);
  49                         $fBucketVal = doBucket($aBucketKeys, CONST_ConnectionBucket_LeakRate, CONST_ConnectionBucket_LeakRate, CONST_ConnectionBucket_BlockLimit);
  50                         setBucketSleeping($aBucketKeys, false);
  51                 }
  52                 $m->decrement('sleepCounter');
  53         }
  54
  55         if (strpos(CONST_BlockedIPs, ','.$_SERVER["REMOTE_ADDR"].',') !== false || $fBucketVal >= CONST_ConnectionBucket_BlockLimit)
  56         {
  57                 header("HTTP/1.0 429 Too Many Requests");
  58                 echo "Your IP has been blocked. \n";
  59                 echo CONST_BlockMessage;
  60                 exit;
  61         }
  62
  63         header('Content-type: text/html; charset=utf-8');
  64