nginx config setup for modx + statcache

site.conf

server {
        root /path/to/site;
        index index.php;
        server_name somedomain.co.uk www.somedomain.co.uk;

        set $cache_uri $request_uri;

        # POST requests and urls with a query string should always go to PHP
        if ($request_method = POST) {
            set $cache_uri 'null cache';
        }

        #loose any caching on querystring items
        if ($query_string != "") {
            set $cache_uri 'null cache';
        }

        add_header X-UA-Compatible IE=edge,chrome=1;

        error_page 418 = @nocache;
        recursive_error_pages on;

        location / {
                if ($http_cookie ~ 'noCache=1') {
                        return 418;
                }
                if ($request_method = POST ) {
                        return 418;
                }

                # try the statcache - otherwise use modx
                try_files /core/cache/statcache/web/$uri~index.html /core/cache/statcache/web/$uri $uri $uri/ @modx;
        }

        location @modx {
                rewrite ^/(.*)$ /index.php?q=$1&$args;
        }

        location @nocache {
                 try_files $uri $uri/ @modx;
        }

        location ~ \.php$ {
                try_files $uri =404;

                set $skip_cache 1;
                if ($cache_uri != "null cache") {
                    add_header X-Cache-Debug "$cache_uri $cookie_nocache $arg_nocache$arg_comment $http_pragma $http_authorization";
                    set $skip_cache 0;
                }
                fastcgi_pass_header Set-Cookie;
                fastcgi_buffers 64 4k;

                include fastcgi_params;
                fastcgi_param   production    "true";
                fastcgi_split_path_info ^(.+\.php)(.*)$;
                fastcgi_pass php5-fpm-sock;
                fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
                fastcgi_intercept_errors on;
        }
}