Improve request URI determination.

system/request.php

@@ -36,7 +36,12 @@ class Request {
 		// -------------------------------------------------------
 		elseif (isset($_SERVER['REQUEST_URI']))
 		{
-			$uri = str_replace('/index.php', '', $_SERVER['REQUEST_URI']);
+			$uri = parse_url($_SERVER['REQUEST_URI'], PHP_URL_PATH);
+
+			if ($uri === false)
+			{
+				throw new \Exception("Malformed request URI. Request terminated.");
+			}
 		}
 		// -------------------------------------------------------
 		// Neither PATH_INFO or REQUEST_URI are available.