Symfony应用程序：对于每个HTTP GET，有2个HTTP头：为什么？

我刚刚意识到，在我新的

symfony 2.6

项目中，每次我在url上执行

GET

，之后都会自动在同一个请求上出现2个

头

但我不知道为什么？也不是从哪里开始，而是从哪里来的问题

有人知道我可以从哪里开始挖掘吗

以下是我的
access
日志摘录：

::1 - - [05/Feb/2015:02:06:31 +0100] "GET /tvjp/demande/lister HTTP/1.1" 200 49930
::1 - - [05/Feb/2015:02:06:34 +0100] "HEAD /tvjp/demande/lister HTTP/1.1" 200 -
::1 - - [05/Feb/2015:02:06:37 +0100] "HEAD /tvjp/demande/lister HTTP/1.1" 200 -
::1 - - [05/Feb/2015:02:07:02 +0100] "GET /tvjp/ws/requests HTTP/1.1" 200 201
::1 - - [05/Feb/2015:02:07:05 +0100] "HEAD /tvjp/ws/requests HTTP/1.1" 200 -
::1 - - [05/Feb/2015:02:07:07 +0100] "HEAD /tvjp/ws/requests HTTP/1.1" 200 -
::1 - - [05/Feb/2015:02:12:33 +0100] "GET /tvjp/demande/editer HTTP/1.1" 200 1080
::1 - - [05/Feb/2015:02:12:42 +0100] "HEAD /tvjp/demande/editer HTTP/1.1" 500 -
::1 - - [05/Feb/2015:02:12:45 +0100] "HEAD /tvjp/demande/editer HTTP/1.1" 500 -
::1 - - [05/Feb/2015:02:12:49 +0100] "GET /tvjp/ws/requests/136 HTTP/1.1" 200 39
::1 - - [05/Feb/2015:02:12:54 +0100] "HEAD /tvjp/ws/requests/136 HTTP/1.1" 200 -
::1 - - [05/Feb/2015:02:12:56 +0100] "HEAD /tvjp/ws/requests/136 HTTP/1.1" 200 -

这与Symfony框架无关。您使用的是什么web浏览器？？您是否在web浏览器中打开了开发人员控制台？？您是否在浏览器中安装了插件？？尝试其他浏览器并检查访问日志。
你说得对！！！我无法在firefox上重现这一点。我使用的是chrome浏览器。我白白浪费了时间。非常感谢你。