Can return promise from express middleware

expressPromise.ts

/**
 * Can return promise from express middleware
 * router.get('/pets', expressPromise(req => {
        return db.getAll().then(... do some stuff...); // <it's a Promise!
    }));
 */
export function expressPromise(worker: (req: Request) => any) {
    return (req: Request, res: Response, next: NextFunction) => {
        // wrap with "Promise.resolve()", so if an exception is thrown in "worker" it will be handled with 'catch'
        Promise.resolve()
            .then(() => worker(req))
            .then(res.send.bind(res))
            .catch(next);
    };
}