Does the expires directive add the head if the Expire head not exist?

[Delta Yeh]

I think it's because ncache2.0 module.

I built nginx 0.7.10  with ncache2.0  but i didn't turn it on in my conf.

When I use  if ( $request_uri ~* ^.+.(css|jpg|jpeg|gif)$ ) {
			#if ( $content_type ~ css ) {
			   expires max;
			
			
			}

I the error log is :

2008/08/18 10:11:16 [notice] 5589#0: using the "epoll" event method
2008/08/18 10:11:16 [notice] 5589#0: nginx/0.7.10
2008/08/18 10:11:16 [notice] 5589#0: built by gcc 4.1.2 20061115
(prerelease) (Debian 4.1.1-21)
2008/08/18 10:11:16 [notice] 5589#0: OS: Linux 2.6.22.18-co-0.7.3
2008/08/18 10:11:16 [notice] 5589#0: getrlimit(RLIMIT_NOFILE): 1024:1024
2008/08/18 10:11:16 [notice] 5595#0: start worker processes
2008/08/18 10:11:16 [notice] 5595#0: start worker process 5596
2008/08/18 10:12:26 [notice] 5595#0: signal 17 (SIGCHLD) received
2008/08/18 10:12:26 [alert] 5595#0: worker process 5596 exited on signal 11
2008/08/18 10:12:26 [notice] 5595#0: start worker process 5602
2008/08/18 10:12:32 [notice] 5595#0: signal 17 (SIGCHLD) received
2008/08/18 10:12:32 [alert] 5595#0: worker process 5602 exited on signal 11
2008/08/18 10:12:32 [notice] 5595#0: start worker process 5608
2008/08/18 10:13:20 [notice] 5595#0: signal 17 (SIGCHLD) received
2008/08/18 10:13:20 [alert] 5595#0: worker process 5608 exited on signal 11
2008/08/18 10:13:20 [notice] 5595#0: start worker process 5625


But when I build without ncache2.0 , the same conf  works as expected.
I will report the bug to the author of ncache.

2008/8/18 Delta Yeh <delta.yeh at gmail.com>:
> 2008/8/18 Maxim Dounin <mdounin at mdounin.ru>
>>
>> Hello!
>>
>> On Sun, Aug 17, 2008 at 07:27:38PM +0800, Delta Yeh wrote:
>>
>>> I use
>>>
>>> location / {
>>>           proxy_redirect   off;
>>>           proxy_redirect   default;
>>
>> JFYI:
>>
>> "proxy_redirect default" is useless here since redirects was switched off by "proxy_redirect off".
>>>
>>>           #if ( $request_uri ~* ^.+.(css|jpg|jpeg|gif)$ ) {
>   I had thought proxy_redirect off first  clear all  previous proxy
> redirect  settings, then the second proxy_redirect default will
> define a clean default settings. Maybe I 'm wrong.
>>
>> JFYI:
>>
>> Since last dot in regex isn't escaped, this expression will match something like "/some-notes-about-css" as well as "/style.css".
>
>  Aha, I only copied it from others configuration for my test, but
> thank you anyway, I will tweak it in production environment later.
>
>
>>>           if ( $content_type ~* css ) {
>>
>> Variable $content_type contains Content-Type header value from *request*.  It's unlikely that request will contain css in it's Content-Type.
>>
>> See http://wiki.codemongers.com/NginxHttpCoreModule#var_content_type
>
>  I think Content-Type value can be text/css .
>
>>>              expires 1h;
>>>
>>>           }
>>>
>>>           proxy_pass http://my_upstream;
>>>
>>>       }
>>>
>>> but it does not work.
>>>
>>> when I use $request_uri the browser get error response. It seems the nginx
>>> box reset the tcp connection.
>>
>> I've just checked and with $request_uri it works as expected. I.e.  nginx adds Expires and Cache-Control headers to response if .
>>
>> Try tcpdump / error log / error log at debug level to figure out what's actually happening.
>  I will try again and share with others what mistake I had made, ^_^
>>> when I use $content_type  no Expires head returned by nginx.
>>
>> Also as expected, see above.
>>
>> Maxim Dounin
>>
>