Connect middleware for CORS

gistfile1.js

app.use(function(req, res, next) {
	var oneof = false;
	if(req.headers.origin) {
		res.header('Access-Control-Allow-Origin', req.headers.origin);
		oneof = true;
	}
	if(req.headers['access-control-request-method']) {
    	res.header('Access-Control-Allow-Methods', req.headers['access-control-request-method']);
		oneof = true;
	}
	if(req.headers['access-control-request-headers']) {
		res.header('Access-Control-Allow-Headers', req.headers['access-control-request-headers']);
		oneof = true;
	}
	if(oneof) {
		res.header('Access-Control-Max-Age', 60 * 60 * 24 * 365);
	}
      
    // intercept OPTIONS method
    if (oneof && req.method == 'OPTIONS') {
		res.send(200);
    }
	else {
		next();
	}
});