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Stephen J Day fdcfc56f7b Refactor handling of hmac state packing ... This refactors the hmac state token to take control of the layerUploadState json message, which has been removed from the storage backend. It also moves away from the concept of a LayerUploadStateStore callback object, which was short-lived. This allows for upload offset to be managed by the web application logic in the face of an inconsistent backend. By controlling the upload offset externally, we reduce the possibility of misreporting upload state to a client. We may still want to modify the way this works after getting production experience. Signed-off-by: Stephen J Day <stephen.day@docker.com>		2015-01-09 14:50:39 -08:00
docs	Refactor handling of hmac state packing	2015-01-09 14:50:39 -08:00