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                 header("Access-Control-Allow-Headers: ".$_SERVER['HTTP_ACCESS_CONTROL_REQUEST_HEADERS']);
   9         }
  10         if ($_SERVER['REQUEST_METHOD'] == 'OPTIONS') exit;
  11
  12         if (CONST_ClosedForIndexing && strpos(CONST_ClosedForIndexingExceptionIPs, ','.$_SERVER["REMOTE_ADDR"].',') === false)
  13         {
  14                 echo "Closed for re-indexing...";
  15                 exit;
  16         }
  17
  18         $aBucketKeys = array();
  19
  20         if (isset($_SERVER["HTTP_REFERER"])) $aBucketKeys[] = str_replace('www.','',strtolower(parse_url($_SERVER["HTTP_REFERER"], PHP_URL_HOST)));
  21         if (isset($_SERVER["REMOTE_ADDR"])) $aBucketKeys[] = $_SERVER["REMOTE_ADDR"];
  22         if (isset($_GET["email"])) $aBucketKeys[] = $_GET["email"];
  23
  24         $fBucketVal = doBucket($aBucketKeys,
  25                         (defined('CONST_ConnectionBucket_PageType')?constant('CONST_ConnectionBucket_Cost_'.CONST_ConnectionBucket_PageType):1) + user_busy_cost(),
  26                         CONST_ConnectionBucket_LeakRate, CONST_ConnectionBucket_BlockLimit);
  27
  28         if ($fBucketVal > CONST_ConnectionBucket_WaitLimit && $fBucketVal < CONST_ConnectionBucket_BlockLimit)
  29         {
  30                 $m = getBucketMemcache();
  31                 $iCurrentSleeping = $m->increment('sleepCounter');
  32                 if (false === $iCurrentSleeping)
  33                 {
  34                         $m->add('sleepCounter', 0);
  35                         $iCurrentSleeping = $m->increment('sleepCounter');
  36                 }
  37                 if ($iCurrentSleeping >= CONST_ConnectionBucket_MaxSleeping || isBucketSleeping($aBucketKeys))
  38                 {
  39                         // Too many threads sleeping already.  This becomes a hard block.
  40                         $fBucketVal = doBucket($aBucketKeys, CONST_ConnectionBucket_BlockLimit, CONST_ConnectionBucket_LeakRate, CONST_ConnectionBucket_BlockLimit);
  41                 }
  42                 else
  43                 {
  44                         setBucketSleeping($aBucketKeys, true);
  45                         sleep(($fBucketVal - CONST_ConnectionBucket_WaitLimit)/CONST_ConnectionBucket_LeakRate);
  46                         $fBucketVal = doBucket($aBucketKeys, CONST_ConnectionBucket_LeakRate, CONST_ConnectionBucket_LeakRate, CONST_ConnectionBucket_BlockLimit);
  47                         setBucketSleeping($aBucketKeys, false);
  48                 }
  49                 $m->decrement('sleepCounter');
  50         }
  51
  52         if (strpos(CONST_BlockedIPs, ','.$_SERVER["REMOTE_ADDR"].',') !== false || $fBucketVal >= CONST_ConnectionBucket_BlockLimit)
  53         {
  54                 echo "Your IP has been blocked. \n";
  55                 echo "Please create a nominatim trac ticket (http://trac.openstreetmap.org/newticket?component=nominatim) to request this to be removed. \n";
  56                 echo "Information on the Nominatim usage policy can be found here: http://wiki.openstreetmap.org/wiki/Nominatim#Usage_Policy \n";
  57                 exit;
  58         }
  59
  60         header('Content-type: text/html; charset=utf-8');
  61