Optional
Size of the data in bytes. Only used when writing a stream (Readable), where the size cannot be known in advance. Some providers (e.g. AWS) reject uploads without a known content length.
Signal to abort the request.
Content-Type of the file.
Size of the data in bytes. Only used when writing a stream (Readable), where the size cannot be known in advance. Some providers (e.g. AWS) reject uploads without a known content length.