POST AJAX request denied - CORS?

Question

I have setup CORS on my node.js server on port 5000 as follows:

var app = express();

app.use(cors()); //normal CORS
app.options(\'*\', cors()); //preflight         


        

Answer 1

CORS doesn't work using the file protocol because there is no server there to send back the requisite headers. Your solution of using a server is the only way to get CORS to work.