gr0uch/promise-middleware

Use callback-based middlewares as promises.

Promise Middleware

This module wraps HTTP callback-based middlewares that follow the convention (req, res, next) popularized by frameworks such as Connect and Express, and turns them into promises. This enables them to be used in a generic manner without frameworks, and with flow control features such as async/await.

$ npm install promise-middleware

Usage

import http from 'http'
import middlewareWrapper from 'promise-middleware'
import corsMiddleware from 'cors'

const cors = corsMiddleware()

// ES7 example.
http.createServer(async (request, response) => {
  // The signature of the wrapper function is typically `request`, `response`,
  // and lastly `middleware`, which is a function that typically accepts the
  // arguments `req`, `res`, `next`.
  const middleware = fn => middlewareWrapper(request, response, fn)

  await middleware(cors)

  response.end('Hello world!')
})

.listen(1337)

License

This software is licensed under the MIT License.