偶然发现土豆的一台css服务器，服务器是tws，难道是tudou web server 0.3？

[root@mail ~]# curl -I www.tudou.com
HTTP/1.1 200 OK
Via: 1.1 SERVER
Connection: Keep-Alive
Proxy-Connection: Keep-Alive
Content-Length: 246369
Age: 5
Expires: Thu, 18 Aug 2011 00:18:25 GMT
Date: Thu, 18 Aug 2011 00:11:30 GMT
Content-Type: text/html
Server: tws0.3
Last-Modified: Thu, 18 Aug 2011 00:09:59 GMT
Cache-Control: max-age=420
Vary: Accept-Encoding
X-Cache: HIT from www.tudou.com
[root@mail ~]# curl -I css.tudouui.com
HTTP/1.1 200 OK
Via: 1.1 SERVER
Connection: close
Proxy-Connection: close
Expires: Mon, 17 Oct 2011 00:04:37 GMT
Date: Thu, 18 Aug 2011 00:04:37 GMT
Content-Type: text/html
Server: Apache
Accept-Ranges: bytes
Last-Modified: Wed, 26 Dec 2007 17:17:42 GMT
Cache-Control: max-age=5184000

可能是土豆修改过web服务器的源码。很可能是nginx