OptionalallowedOne or more origins you want customers to be able to access the bucket from.
OptionalexposeOne or more headers in the response that you want customers to be able to access from their applications.
OptionalidUnique identifier for the rule. The value cannot be longer than 255 characters.
OptionalmaxThe time in seconds that your browser is to cache the preflight response for the specified resource.
Headers that are specified in the
Access-Control-Request-Headersheader. These headers are allowed in a preflightOPTIONSrequest.