express-ctx

express context based on async_hooks without getting lost context

Install

npm i express-ctx

Usage

const express = require('express');
const { middleware, setValue, getValue } = require('express-ctx');
const usersRepository = require('./usersRepository'); // some your services

const app = express();

app.use(middleware); // must be set before using setValue/getValue

app.use((req, res, next) => {
  usersRepository.findOne(req.session.id).then(user => {
    setValue('user', user);
    next();
  });
});

app.use((req, res, next) => {
  const user = getValue('user');
  res.json(user);
});

Other libs

As for now such libraries as express-http-context and express-cls-hooked do not bind req and res to namespace, so there could be troubles with middlewares based on emitting events. So this lib binds.