Fix request log

Author: fdreamsu

src/HttpServer.php

@@ -298,8 +298,8 @@ public function onRequest(\Swoole\Http\Request $request, \Swoole\Http\Response $
         -- self::$worker->worker_http_request_counter;
 
         $end_time = microtime(true);
-        $response_string = sprintf("#$user_id (%s) %.3fms", \session::getId(), ($end_time - $request_time) * 1000) .
-             " [$code]$enmsg";
+        $response_string = sprintf("#$user_id (%s) %.3fms [$code]$enmsg", \session::getId(),
+            ($end_time - $request_time_float) * 1000);
         if ($code !== 200 || $enmsg !== 'ok')
             $response_string .= ' ' . $cnmsg;