Quick and simple Node.js Server writen in Coffeescript

server.coffee

http = require 'http'
path = require 'path'
fs   = require 'fs'
port = 80

sysout = console.log

CONTENT_TYPES =
  html : 'text/html'
  js   : 'application/javascript'
  css  : 'text/css'
  png  : 'image/png'
  jpg  : 'image/jpeg'
  gif  : 'image/gif'
  json : 'application/json'
  mp3  : 'audio/mpeg'
  swf  : 'application/x-shockwave-flash'

httpReturn = (req, res, code..., content)->
  if code.length is 0
    code = [content]
    content = ''
  sysout code[0] + ' | ' + code[1]['Content-Type'] + ' | ' + req.url
  res.writeHead.apply res, code
  if content.length > 0
    res.end content, 'utf-8'
  else
    res.end()

myServer = http.createServer((request, response)->

  filePath    = '.' + request.url;
  if filePath == './' then filePath = './index.html'

  extname     = path.extname filePath
  contentType = CONTENT_TYPES[extname.substring(1)]

  fs.exists filePath, (exists)->
    if exists
      fs.readFile filePath, (error, content)->
        if error
          httpReturn request, response, 500
        else
          httpReturn request, response, 200, { 'Content-Type': contentType }, content
    else
      httpReturn request, response, 404

).listen port

sysout 'Server running at http://127.0.0.1:' + port + '/'