CORS: Cannot use wildcard in Access-Control-Allow-Origin when credentials flag is true

Question

I have a setup involving

Frontend server (Node.js, domain: localhost:3000) <---> Backend (Django, Ajax, domain: localhost:8000)

Browser <-- webapp <

Answer 1

This works for me in development but I can't advise that in production, it's just a different way of getting the job done that hasn't been mentioned yet but probably not the best. Anyway here goes:

You can get the origin from the request, then use that in the response header. Here's how it looks in express:

app.use(function(req, res, next) {
  res.header('Access-Control-Allow-Origin', req.header('origin') );
  next();
});

I don't know what that would look like with your python setup but that should be easy to translate.