req.Header = testCase.headers

			opts, _ := getAndValidateAttributesOpts(ctx, rec, req, bucket, "testobject")

			if !reflect.DeepEqual(opts.ObjectAttributes, testCase.wantObjectAttrs) {
				t.Errorf("want opts %v, got %v", testCase.wantObjectAttrs, opts.ObjectAttributes)
			}
		})
	}

		valid = false
		return
	}

	opts.ObjectAttributes = parseObjectAttributes(r.Header)
	if len(opts.ObjectAttributes) < 1 {
		apiErr = errorCodes.ToAPIErr(ErrInvalidAttributeName)
		argumentName = strings.ToLower(xhttp.AmzObjectAttributes)
		valid = false
		return
	}

	for tag := range opts.ObjectAttributes {
		switch tag {
		case xhttp.ETag:
		case xhttp.Checksum:

	Tagging                 bool // Is only in GET/HEAD operations to return tagging metadata along with regular metadata and body.

	UserDefined         map[string]string   // only set in case of POST/PUT operations
	ObjectAttributes    map[string]struct{} // Attribute tags defined by the users for the GetObjectAttributes request
	MaxParts            int                 // used in GetObjectAttributes. Signals how many parts we should return

				ChecksumSHA256: strings.Split(chkSums["SHA256"], "-")[0],
			}
		}
	}

	if _, ok := opts.ObjectAttributes[xhttp.ETag]; ok {
		OA.ETag = objInfo.ETag
	}

	if _, ok := opts.ObjectAttributes[xhttp.ObjectSize]; ok {
		OA.ObjectSize, _ = objInfo.GetActualSize()
	}

	if _, ok := opts.ObjectAttributes[xhttp.StorageClass]; ok {
		OA.StorageClass = filterStorageClass(ctx, objInfo.StorageClass)
	}