--- /dev/null
+<?php
+if(!isset($_GET['q'])) $this->post_redirect_get('',"This assistant shouldn't be used like this");
+$id=$_GET['q'];
+$barcode_prefix_regexp = '/^'.preg_replace('/\//', '\/', BARCODE_PREFIX).'/';
+if(preg_match($barcode_prefix_regexp, $id)) $id=preg_replace($barcode_prefix_regexp, '', $id);
+if(preg_match('/\//', $id)) $this->post_redirect_get(strtolower($id));
+ else $this->post_redirect_get('?q='.urlencode($id));