fixing bug in jsonld processing with certain URL paths

lib/Request.php

@@ -154,7 +154,9 @@ class Request
     public function getRequestUri()
     {
         return array_key_exists('REQUEST_URI', $_SERVER) ?
-            htmlspecialchars($_SERVER['REQUEST_URI']) : '/';
+            htmlspecialchars(
+                parse_url($_SERVER['REQUEST_URI'], PHP_URL_PATH)
+            ) : '/';
     }
 
     /**