Angular $http status (-1)

Question

I call a backend service/resource by AngularJs $HTTP GET. When it is not available it returns 404 and Chrome Network tab shows that it is 404

Answer 1

It returns -1 because, as the traces show, the GET request has not even been sent. What has been sent is the pre-flight OPTIONS request, which, by returning 404, prevented the browser to send the actual GET request.

Your server shouldn't return a 404 response for the OPTIONS request. It should return a 200 response.