CORS errors

General
1

Hey everyone,

we’ve been using Cloudflare for about two months by now. We are running a Web application with multiple thousand users a day and are having CORS errors since we swapped to Cloudflare. Some are caused because the old Allow-Cross-Origin-Header was cached when users switch from one domain to another, other just think that no header is present. Is there any way to solve this problem or to just allow all CORS for now?

Thanks a lot in advance,
NIklas

2

If you’re sure your server in fact sends them when request is sent to it directly… have you tried this: https://support.cloudflare.com/hc/en-us/articles/203063414-Why-can-t-I-see-my-CORS-headers- ?

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