OptionalcacheCache-Control value written to storage.
OptionalchecksumRequest checksum verification for direct uploads and expose the requirement through the upload manifest so browser clients can send expected digests.
OptionalcontentAccepted MIME content types. Omit to accept any content type.
OptionalcontentVerify supported MIME types against file signatures instead of trusting only the client-declared content type.
OptionalmaxMaximum files accepted by one request.
OptionalmaxMaximum accepted file size in bytes.
OptionalvisibilityObject visibility written to storage.
Constraints for files accepted by an upload definition.