user-agent based blocking

[nominatim.git] / website / reverse.php
diff --git a/website/reverse.php b/website/reverse.php

index f569ffac1abbf6ba9dc82ad33ddcc7acb1f1500f..b050484d0c052b54ef964cceebd6ea11c181be86 100755 (executable)
--- a/website/reverse.php
+++ b/website/reverse.php
@@ -2,7 +2,21 @@
         require_once(dirname(dirname(__FILE__)).'/lib/init-website.php');
         require_once(CONST_BasePath.'/lib/log.php');
  
-       $oDB =& getDB();
+    if (preg_match(CONST_BlockedUserAgents, $_SERVER["HTTP_USER_AGENT"]) > 0)
+    {
+        $fLoadAvg = getLoadAverage();
+        if ($fLoadAvg >= CONST_BlockReverseMaxLoad) {
+            header('HTTP/1.0 403 Forbidden');
+            header('Content-type: text/html; charset=utf-8');
+               echo "<html><body><h1>App temporarily blocked</h1>";
+            echo "Your application has been temporarily blocked from the OpenStreetMap Nominatim ";
+            echo "geolocation service due to high server load.";
+            echo "\n</body></html>\n";
+            exit;
+        }
+
+    }
+
  
          if (strpos(CONST_BulkUserIPs, ','.$_SERVER["REMOTE_ADDR"].',') !== false)
          {
@@ -16,10 +30,11 @@
                  }
          }
  
+        $oDB =& getDB();
          ini_set('memory_limit', '200M');
  
          // Format for output
-       $sOutputFormat = 'xml';
+        $sOutputFormat = 'xml';
          if (isset($_GET['format']) && ($_GET['format'] == 'xml' || $_GET['format'] == 'json' || $_GET['format'] == 'jsonv2'))
          {
                  $sOutputFormat = $_GET['format'];