I'm currently using nginx as reverse proxy with caching enabled.

However, the main site has two different layouts, depending on the user-agent (mobile or not).

I've tried something similar to this:

    # mobile users
    if ($http_user_agent ~* '(iPhone|iPod|mobile|Android|2.0\ MMP|240x320|AvantGo|BlackBerry|Blazer|Cellphone|Danger|DoCoMo|Elaine/3.0|EudoraWeb|hiptop|IEMobile)') {
            set $iphone_request '1';
    if ($iphone_request = '1') {
            proxy_cache        mobile;
    if ($iphone_request = '') {
            proxy_cache        site;
    proxy_cache_key    "$scheme://$host$request_uri";
    proxy_pass         http://real-site.tld;

However, nginx gives an error, stating proxy_cache can't be used in an if-structure.

Any other way to serve from a different cache depending on the browser?

Thanks, Tuinslak

2 Answers 2


Why using different cache? Probably it would be sufficient to define your cache key based on $iphone_request variable?

proxy_cache_key "$iphone_request$uri";

Redirect to subdomain for mobile devices (with different caching policy)?

  • 1
    It's actually a Wordpress blog, running a different theme for mobile users. Enabling the mobile theme results in seeing the mobile device layout in a desktop browser if that page has been seen on a mobile device first (and idem dito the other way around).
    – Tuinslak
    Jun 10, 2010 at 14:02

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.