middleware.js

const sequence = require('run-sequence')

// create a middleware stack
// (obj, obj, [fn(obj, obj, fn)], fn) -> null
function mw (req, res, arr, done) {
  const fns = arr.map(fn => (next) => fn(req, res, next))
  sequence(fns, done)
}

Usage:

require('http').createServer((req, res) => {
  const fns = [
    (req, res, next) => { 
      res.write('oh yeah!')
      next()
    },
    (req, res, next) => { 
      res.statusCode = 200
      next()
    }
  ]
  require('./middleware')(req, res, fns, res.end)
}).listen(1337)