gistfile1.txt

# In the main vhost config
proxy_cache_path /var/cache/nginx levels=1:2
keys_zone=microcache:5m max_size=1000m;


# In the location /
        # Init cache bypass
        set $no_cache "";

        # If non GET/HEAD, don't cache & mark user as uncacheable for 1 second via cookie
        if ($request_method !~ ^(GET|HEAD)$) {
            set $no_cache "1";
        }

        # Drop no cache cookie if needed 
        if ($no_cache = "1") {
            add_header Set-Cookie "<%= @frontend_cookie %>=1; Max-Age=2; Path=/";
            add_header X-Microcachable "0";
        }

        # Bypass cache if no-cache cookie is set
        if ($http_cookie ~* "<%= @frontend_cookie %>") {
            set $no_cache "1";
        }

        # Bypass cache if flag is set
        proxy_no_cache $no_cache;
        proxy_cache_bypass $no_cache;

        # Set cache zone
        proxy_cache microcache;

        # Set cache key to include identifying components
        proxy_cache_key $scheme$host$request_method$request_uri;

        # Cache 404 responses for 10 minutes
        proxy_cache_valid 404 10m;

        # Only cache valid HTTP 200 responses for 1 minute
        proxy_cache_valid 200 1m;

        # Serve from cache if currently refreshing
        proxy_cache_use_stale updating;