proxy_cache global;
proxy_redirect          off;
proxy_set_header        Host            $host;
proxy_set_header        X-Real-IP       $remote_addr;
proxy_set_header        X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_pass_header       Set-Cookie;
client_max_body_size    10m;
client_body_buffer_size 128k;
proxy_connect_timeout   90;
proxy_send_timeout      90;
proxy_read_timeout      90;
proxy_buffers           32 4k;

set $cache_key $scheme$host$uri$is_args$args$cookie_user;
proxy_cache_key $cache_key;
proxy_cache_valid 200 10h;
expires 3d;

### force timeouts if one of backend is died ##
proxy_next_upstream error timeout invalid_header http_500 http_502 http_503;

location = /status {
        stub_status on;
        allow 127.0.0.1;
        allow 192.168.1.0;
        deny all;
}

location ~ /purge(/.*) {
        allow 127.0.0.1;
        allow 192.168.1.0;
        deny all;
        proxy_cache_purge global $cache_key;
}