所有的 200 访问都被 Location 到网址首页

比如查询的地址：

http://www.abc.com/article/59835/

返回的header：

HTTP/1.1 200 OK
Server: nginx
Date: Mon, 27 Apr 2015 14:45:38 GMT
Content-Type: text/html; charset=
Content-Length: 7364
Connection: close
Vary: Cookie,Accept-Encoding
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Pragma: no-cache
Set-Cookie: PHP_SESSION=m7ai50fkd1qka2hgaqtapas0e0; path=/
Location: http://www.abc.com
Content-Encoding: gzip

为什么Location:都指向网站首页呢？