// Multipart parts count
	AmzMpPartsCount = "x-amz-mp-parts-count"

	// Object date/time of expiration
	AmzExpiration = "x-amz-expiration"

	// Dummy putBucketACL
	AmzACL = "x-amz-acl"

	// Signature V4 related constants.
	AmzContentSha256        = "X-Amz-Content-Sha256"
	AmzDate                 = "X-Amz-Date"
	AmzAlgorithm            = "X-Amz-Algorithm"

		// Dummy Bucket Calls
		// GetBucketACL -- this is a dummy call.
		router.Methods(http.MethodGet).
			HandlerFunc(s3APIMiddleware(api.GetBucketACLHandler)).
			Queries("acl", "")
		// PutBucketACL -- this is a dummy call.
		router.Methods(http.MethodPut).
			HandlerFunc(s3APIMiddleware(api.PutBucketACLHandler)).
			Queries("acl", "")
		// GetBucketCors - this is a dummy call.
		router.Methods(http.MethodGet).