gistfile1.txt

events {
    worker_connections  1024;
}


http {

    # Set cache dir
    proxy_cache_path /var/nginx-cache levels=1:2 keys_zone=microcache:5m;

    # Virtualhost/server configuration
    server {
        listen   80;
        server_name  localhost;

        # Define cached location (may not be whole site)
        location / {
            ssi on;

            # Setup var defaults
            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";
            }

            # Bypass the cache if this is a subrequest
            if ($request_uri != $uri) {
                set $no_cache "1";
            }

            # Drop no cache cookie if need be
            # (for some reason, add_header fails if included in prior if-block)
            if ($no_cache = "1") {
                add_header Set-Cookie "_mcnc=1; Max-Age=2; Path=/";
                add_header X-Microcachable "0";
            }

            # Bypass cache if no-cache cookie is set
            if ($http_cookie ~* "_mcnc") {
                set $no_cache "1";
            }

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

            # Point nginx to the real app/web server
            proxy_pass http://localhost:8000;

            # Set cache zone
            proxy_cache microcache;

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

            # Only cache valid HTTP 200 responses for 10 seconds
            proxy_cache_valid 200 10s;

            # Serve from cache if currently refreshing
            proxy_cache_use_stale updating;

            # Send appropriate headers through
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

            # Set files larger than 1M to stream rather than cache
            proxy_max_temp_file_size 1M;

            # Custom logging
            log_format custom '$remote_addr - $remote_user [$time_local]  '
                        '"$request" $status $body_bytes_sent '
                        '"$http_referer" "$http_user_agent" nocache:$no_cache';
            access_log  logs/microcache.log custom;

        }

    }

}