Github Pages has been blocked by CORS policy again

[LTBIONFT000]

My github pages has been working fine with CORS policy until yesterday, when suddenly all the API requests were blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.

My code has been exactly the same. Has the Github Pages disabled CORS again?

[jfullstackdev]

maybe similar solution to this or those suggested by others at this thread

https://github.com/orgs/community/discussions/22399

[prantlf]

If you want access a file from GitHub pages from other website, there's a minimum CORS support available. It's literally this single header:

access-control-allow-origin: *

It's enough to download a file, like some JSON configuration. Verbs HEAD and GET work. No other verbs, no preflighting. If you want to test it, pick a file served by GitHub pages:

curl https://<user>.github.io/<repo>/<file> \
  -H 'Origin: https://localhost' \
  -v -X HEAD 2>&1 | grep access

< access-control-allow-origin: *

Important: The header Origin has to point to a HTTPS site, not HTTP. This header will be set automatically by the browser if you use XMLHttpRequest or fetch in the CORS mode.

[traceyCMCA]

Hi, Im really new to Git hub, I have a JSON file that Ive uploaded to a https: public link and need to know exatly (step by step) how to add the access control header - where do i type this ? thanks

[vardhank28]

same question