Can't get OPTIONS pre-flight to work about flask-cors HOT 3 CLOSED

ARggghhh!!! my bad. There was an extra '/' trailing in the URL from my app, and not in my 'direct' browser attempt in #1 above.

Thanks much for your help. Sorry for the false alert...
Eric

from flask-cors.

Hi @erdillon sorry to hear you are having trouble, I want to do my best to help you get to the bottom of this.

1. As you probably know, 404 is a not found exception. Have you double checked the URL you are making a request to? Can you see the log of requests in the flask debugger?
2. If a 404 is being triggered, (i.e. if you have some sort of ORM which automatically returns a 404 if a particular object is not found), Flask-Cors currently will not add CORS headers to the response, as it is outside the scope of the view function. The way to fix this is wrap the 404 handler with the decorator.

from flask-cors.

1. Yes, the URL is correct. A direct hit from browser (no cross-domain) does work.
2. Not sure I understand. I thought Flask-Cors was adding the OPTIONS method to a route where the decorator was places. In fact, please note that another route using 'POST' does work fine. I do see the OPTIONS resp go 200, followed by the actual POST.

from flask-cors.