server.js

/**
 * Module dependencies.
 */

var http = require('http')
  , url = require('url')
  , join = require('path').join
  , exists = require('path').exists
  , extname = require('path').extname
  , join = require('path').join
  , fs = require('fs')
  , port = process.argv[2] || 8003;

var mime = {
    'html': 'text/html'
  , 'css': 'text/css'
  , 'js': 'application/javascript'
};

http.createServer(function(req, res){
  console.log('  \033[90m%s \033[36m%s\033[m', req.method, req.url);
  var pathname = url.parse(req.url).pathname
    , path = join(process.cwd(), pathname);

  function notFound() {
    res.statusCode = 404;
    res.end("404 Not Found\n")
  }

  function error(err) {
    res.statusCode = 500;
    res.end(err.message + "\n");
  }

  exists(path, function(exists){
    if (!exists) return notFound()
    fs.stat(path, function(err, stat){
      if (err) return error();
      if (stat.isDirectory()) path = join(path, 'index.html');
      res.setHeader('Cache-Control', 'no-cache');
      res.setHeader('Content-Type', mime[path.split('.').slice(-1)] || 'application/octet-stream');
      fs.createReadStream(path).pipe(res);
    });
  })
}).listen(port);

console.log('\n  Server listening on %d\n', port);