Basic CORS Request Headers

cors_middleware_headers.js

//Set up CORS headers from client-side
app.use(function(req, res, next) {
    res.header("Access-Control-Allow-Origin", "*");
    res.header("Access-Control-Allow-Methods", "PUT, GET, POST, DELETE, OPTIONS");
    res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept, Authorization, Access-Control-Allow-Credentials");
    res.header("Access-Control-Allow-Credentials", "true");
    next();
});