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

[Delta Yeh]

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
>