I am working on a personal chat app using fastapi ,python socketio and React . I have mounted the socketio app on startup event of fastapi. Now there is this issue that when i try to connect socket there is some or the other cors error, such as that of duplicated origin, mixed content or access-control-allow-origin is null, or loclahost:3000 is not an accepted origin, or headers cannot be ““. For the CorsMiddleware i have tried different entries in allow_origins such as passing in ““, or particular ip with their ports but to no avail.Also for socket Asyncserver, when I keep the cors_allowed_origins as an empty list it seems to work as cors is disabled for the socket but I want to allow only specific addresses.I am quite stuck and have also referred to other posts and articles . Any help is highly appreciated. Thanks