express-async-wrapper

express-async-wrapper

Wrap async express routes so exceptions can be caught by middleware.

If you're using the awesome ES7/ES2017 async/await features in your express routes, you'll notice that when a route throws an exception it times out. This wrapper allows express to properly catch exceptions and pass them to the appropriate error handler instead.

This code was borrowed from the StrongLoop blog post on handling async/await routes in express, I take no credit for coming up with this solution, I just wanted an npm module to use in my apps.

Install

# With npm
npm install  --save express-async-wrapper

# With yarn
yarn add express-async-wrapper

Usage

If you have a async express route file, like so:

const wrap = require('express-async-wrapper')

module.exports = wrap(async (req, res) => {
  const msg = await someSlowNetworkThingy()
  res.send('Hello', msg)
})

Now your route properly returns a promise object for express that will catch any throw exceptions.

Changelog

v0.1.0

• Initial release! 🎉 🍾

Credits

Licensed under an MIT license by Dana Woodman.

Original source code by StrongLoop (see here)

Pull requests welcome!