Proxy_cache - how to change expires?

Server NGINX
1

Hello!

I’m using nginx as a proxy-cache for OSM tiles. My problem is this
sentence in documentation :
“”“The cache honors backend’s Cache-Control, Expires, and etc since
version 0.7.48"”"[1]

I saw that we’re supposed to be able to override some headers, like
“expires” with proxy_ignore_headers[2], but it doesn’t seem to work.

OSM has an expires set to 3 hours. I’d like to keep tiles for 5 days, so
I have:
proxy_ignore_client_abort on;
proxy_ignore_headers “Expires” “X-Accel-Expires”;
proxy_cache_valid 200 302 7d;
proxy_cache_valid 404 1m;

But it seems my cache is really reseted each 3 hours (for now there
isn’t many traffic on this vhost, it’s just a proof of concept for a
client).

Did I miss something in the documentation ? if so, what ?
Maybe I don’t use the right configuration, too. Any hints ?

Thank you !

Best regards,

C.

[1] Module ngx_http_proxy_module
[2] Module ngx_http_proxy_module

2

Hello!

On Thu, May 13, 2010 at 09:51:37AM +0200, Cédric Jeanneret wrote:

proxy_ignore_headers “Expires” “X-Accel-Expires”;
proxy_cache_valid 200 302 7d;
proxy_cache_valid 404 1m;

But it seems my cache is really reseted each 3 hours (for now there
isn’t many traffic on this vhost, it’s just a proof of concept for a
client).

Did I miss something in the documentation ? if so, what ?
Maybe I don’t use the right configuration, too. Any hints ?

Expires may be set via Cache-Control as well (max-age=). You have
to ignore it too.

Maxim D.

3

On Thu, May 13, 2010 at 09:51:37AM +0200, Cédric Jeanneret wrote:

OSM has an expires set to 3 hours. I’d like to keep tiles for 5 days, so I have:
Maybe I don’t use the right configuration, too. Any hints ?
nginx sets an expiration time at the moment when a response is cached.
If you did not ignore the headers some time ago, previously cached
responses will be valid for 3 hours only. New responses should be
cached for 7 days.

–
Igor S.
http://sysoev.ru/en/

4

On Thu, May 13, 2010 at 12:24 PM, Igor S. [email protected] wrote:

“expires” with proxy_ignore_headers[2], but it doesn’t seem to work.

Igor S.
Igor Sysoev

nginx mailing list
[email protected]
nginx Info Page

Oh, thank you for the Cache-Control hint. I just added it, I’ll see
what happens from now.

Thank you for the quick answer.

See you!

C.