realguess

// Node server displaying HTTP method
// ==================================

var http = require('http');
http.createServer(function (req, res) {
  res.writeHead(200, {'Content-Type': 'text/plain'});
  res.end(req.method + '\n');
}).listen(3000, '127.0.0.1');
console.log('Server running at http://127.0.0.1:3000/');

realguess

/**
 * Add CORS support.
 */
app.all('*', function (req, res, next) {
  if (!req.get('Origin')) {
    return next();
  }
  
  // use "*" here to accept any origin
  res.set('Access-Control-Allow-Origin', '*');

realguess

var mongodb  = require('mongodb')
  , server   = new mongodb.Server('localhost', 27017, {}) 
  , db       = new mongodb.Db('test', server, {}) 
  ;

console.log('[1]', db.serverConfig._serverState);
db.open(function (err, db) {
  console.log('[2]', err, db.serverConfig._serverState);
  db.close();
  console.log('[3]', err, db.serverConfig._serverState);