app.js

    var ignoreRegexp = ['/^\\/?(?=/|$)/i', '/^(.*)\\/?$/i', '/^\\/ss\\/?(?=/|$)/i'];
    var routerProto = express.Router().__proto__;
    var regexpList = app._router.stack.reduce(function findProto(memo, curr) {
        if (ignoreRegexp.indexOf(curr.regexp.toString()) === -1) {
            memo.push(curr.regexp);
        }

        if (curr.handle.__proto__ === routerProto && curr.handle.stack) {
            memo = curr.handle.stack.reduce(findProto, memo);
        }

        return memo;
    }, []);