npm install cors --save-dev
var express = require('express')
, cors = require('cors')
, app = express();
app.use(cors());
app.get('/products/:id', function(req, res, next){
res.json({msg: 'This is CORS-enabled for all origins!'});
});
app.listen(80, function(){
console.log('CORS-enabled web server listening on port 80');
});