Async Express middleware (for @exception)

index.js

import http from 'http';
import express from 'express';

import testMiddleware from './middleware';

const app = express();
const server = http.createServer(app);

app.use(testMiddleware);

app.get('*', (req, res) => {
  const { name } = res.locals.user;

  res.json({ success: true, name });
});

server.listen(8080);
console.log('Listening on *:8080');

middleware.js

const asyncMiddleware = fn => (req, res, next) => Promise.resolve(fn(req, res, next)).catch(next);

const getUserFromDb = async () => ({
  name: 'Test'
});

const testMiddleware = asyncMiddleware(async (req, res, next) => {
  try {
    const user = await getUserFromDb();

    res.locals.user = user;
    next();
  } catch (err) {
    next(err);
  }
});

export default testMiddleware;