// Assuming the host is 'foo.bar.com'
var express = require('express');
var cookieDomain = require('cookie-domain');
var app = express();
app.use(cookieDomain());

/*
 *  You can also pass global overrides into cookieDomain
 *  app.use(cookieDomain({ maxAge: 86400 });
 */

app.get('/', function(req, res, next) {
  // Set a cookie using some sane defaults: { domain: '.bar.com', path: '/', maxAge: 31536000000 })
  res.cookie('a', 1);

  // Or override the defaults
  res.cookie('b', 1, { maxAge: 86400 });

  // Express will use maxAge over expires, but cookie-domain will remove maxAge and pass expires if you tell it to
  res.cookie('c', 1, { expires: false });

  // Pass false to tell cookie-domain not to pass options at all.
  res.cookie('d', 1, false);

  res.send('hello world');
});