wp-ffpc/nginx-sample.conf

http {
	...
	server {
		...

		# try to get result from memcached
		location @memcached {
				default_type text/html;
				set $memcached_key DATAPREFIX$scheme://$host$request_uri;
				set $memcached_request 1;

				# exceptions
				# avoid cache serve of POST requests
				if ($request_method = POST ) {
						set $memcached_request 0;
				}
				# avoid cache serve of wp-admin-like pages, starting with "wp-"
				if ( $uri ~ "/wp-" ) {
						set $memcached_request 0;
				}
				# avoid cache for logged in users
				if ($http_cookie ~* "comment_author_|wordpressuser_|wp-postpass_" ) {
						set $memcached_request 0;
				}

				if ( $memcached_request = 1) {
						memcached_pass MEMCACHEDHOST:MEMCACHEDPORT;
						error_page 404 = @rewrites;
				}

				if ( $memcached_request = 0) {
						rewrite ^ /index.php$request_uri last;
				}
		}

		## rewrite rules
		location @rewrites {
				rewrite ^ /index.php$request_uri last;
		}

		location / {
				try_files $uri $uri/ @memcached;
		}

		...
	}
}
...