Allowing CORS (Cross-Origin Resource Sharing) requests from grunt server

gistfile1.js

 //Allowing CORS (Cross-Origin Resource Sharing) requests from
 // grunt server, put this into Gruntfile.js
 grunt.initConfig({
    connect: {
      livereload: {
        options: {
          port: 9000,
          hostname: 'localhost',
          middleware: function (connect) {
            return [
              function(req, res, next) {
                res.setHeader('Access-Control-Allow-Origin', '*');
                res.setHeader('Access-Control-Allow-Methods', '*');
                next();
              },
            ];
          }
        }
      }
    }
  });

not working for me either : Cannot GET / is the only response