server.js

/**
 * Dependencies.
 */

var Domain = require('domain');
var http = require('http');
var app = require('..');

/**
 * Export `server`.
 */

var server = http.createServer(onRequest);

/**
 * Listen.
 */

server.listen(process.env.PORT || 3000);

/**
 * Request handler.
 *
 * Wraps `req` and `res` with a domain and forwards the request along to `app`.
 *
 * Note: If any strange errors happen or there is a sign of memory leaks, I
 * would start here first as domains are pretty new.
 */

function onRequest(req, res){
  var domain = Domain.create();

  domain.on('error', function(error){
    console.error(error.stack);

    try {
      var reaper = setTimeout(function(){
        process.exit(1);
      }, 10000);

      reaper.unref();
      server.close();

      res.statusCode = 500;
      res.end(error.message);
    } catch (error) {
      console.error(error.stack);
    }
  });

  domain.add(req);
  domain.add(res);

  domain.run(function(){
    app(req, res);
  });
}