S3 object storage requirements

A S3 compatible object storage must fulfill the following requirements in order to be used in DRACOON:

	Requirement
General	GET Service virtual-host-style access v4 signature pre-signed URL Access Control List (ACL)
Buckets	GET bucket (list objects)
Objects	DELETE object GET object GET object tags PUT object PUT object copy PUT object tags PUT object copy upload part complete multipart upload abort multipart upload list parts Support for CORS

The S3 object storage must also be publicly accessible over the Internet.