Stream MongoDB documents from Node.JS server

server.coffee

"use strict"

http = require 'http'
MongoClient = require('mongodb').MongoClient
stringify = require('JSONStream').stringify

db = null

server = http.createServer (req, res) ->
  cursor = db.collection('turer').find()
  stream = cursor.stream()

  res.writeHead 200, 'Content-Type': 'application/json; charset=utf-8'

  op = '{"documents":['
  cl = '],"count":0,"total":0}'
  stream.pipe(stringify(op, ',', cl)).pipe(res)

MongoClient.connect 'mongodb://localhost:27017/test', (err, database) ->
  db = database
  server.listen 8080, -> console.log 'Server is listening on port 4000...'