case xhttp.StorageClass:
		case xhttp.ObjectSize:
		case xhttp.ObjectParts:
		default:
			apiErr = errorCodes.ToAPIErr(ErrInvalidAttributeName)
			argumentName = strings.ToLower(xhttp.AmzObjectAttributes)
			argumentValue = tag
			valid = false
			return
		}
	}

	return
}

func parseObjectAttributes(h http.Header) (attributes map[string]struct{}) {
	attributes = make(map[string]struct{})

	query.Set(xhttp.AmzSignedHeaders, strings.Join(pSignValues.SignedHeaders, ";"))
	query.Set(xhttp.AmzCredential, cred.AccessKey+SlashSeparator+pSignValues.Credential.getScope())

	defaultSigParams := set.CreateStringSet(
		xhttp.AmzContentSha256,
		xhttp.AmzSecurityToken,
		xhttp.AmzAlgorithm,
		xhttp.AmzDate,
		xhttp.AmzExpires,
		xhttp.AmzSignedHeaders,
		xhttp.AmzCredential,
		xhttp.AmzSignature,
	)

	delete(metadata, xhttp.AmzServerSideEncryption)
	delete(metadata, xhttp.AmzServerSideEncryptionKmsID)
	delete(metadata, xhttp.AmzServerSideEncryptionKmsContext)
	delete(metadata, xhttp.AmzServerSideEncryptionCustomerAlgorithm)
	delete(metadata, xhttp.AmzServerSideEncryptionCustomerKey)
	delete(metadata, xhttp.AmzServerSideEncryptionCustomerKeyMD5)
	delete(metadata, xhttp.AmzServerSideEncryptionCopyCustomerAlgorithm)

		w.Header().Set(xhttp.LastModified, objInfo.ModTime.UTC().Format(http.TimeFormat))

		if objInfo.ETag != "" {
			w.Header()[xhttp.ETag] = []string{"\"" + objInfo.ETag + "\""}
		}
	}

	// If-Match : Return the object only if its entity tag (ETag) is the same as the one specified;
	// otherwise return a 412 (precondition failed).
	ifMatchETagHeader := r.Header.Get(xhttp.IfMatch)
	if ifMatchETagHeader != "" {

	h.Del(xhttp.AmzServerSideEncryptionCustomerKey)
	h.Del(xhttp.AmzServerSideEncryptionCopyCustomerKey)
	h.Del(xhttp.AmzMetaUnencryptedContentLength)
	h.Del(xhttp.AmzMetaUnencryptedContentMD5)
}

// SSECopy represents AWS SSE-C for copy requests. It provides
// functionality to handle SSE-C copy requests.
var SSECopy = ssecCopy{}

type ssecCopy struct{}

// IsRequested returns true if the HTTP headers contains

func setEventStreamHeaders(w http.ResponseWriter) {
	w.Header().Set(xhttp.ContentType, "text/event-stream")
	w.Header().Set(xhttp.CacheControl, "no-cache") // nginx to turn off buffering
	w.Header().Set("X-Accel-Buffering", "no")      // nginx to turn off buffering
}

// Write http common headers
func setCommonHeaders(w http.ResponseWriter) {
	// Set the "Server" http header.
	w.Header().Set(xhttp.ServerInfo, MinioStoreName)

		ExpectedHeader: http.Header{},
	},
	{ // Standard SSE-C request headers
		Header: http.Header{
			xhttp.AmzServerSideEncryptionCustomerAlgorithm: []string{xhttp.AmzEncryptionAES},
			xhttp.AmzServerSideEncryptionCustomerKey:       []string{"MzJieXRlc2xvbmdzZWNyZXRrZXltdXN0cHJvdmlkZWQ="},
			xhttp.AmzServerSideEncryptionCustomerKeyMD5:    []string{"7PpPLAK26ONlVUGOWlusfg=="},
		},
		ExpectedHeader: http.Header{

	}

	// Drain any response.
	xhttp.DrainBody(resp.Body)

	switch resp.StatusCode {
	case http.StatusOK, http.StatusCreated, http.StatusAccepted, http.StatusNoContent:
		// accepted HTTP status codes.
		return nil
	case http.StatusForbidden:

// if configured.
func ReadinessCheckHandler(w http.ResponseWriter, r *http.Request) {
	if objLayer := newObjectLayerFn(); objLayer == nil {
		w.Header().Set(xhttp.MinIOServerStatus, unavailable) // Service not initialized yet
	}
	if r.Header.Get(xhttp.MinIOPeerCall) != "" {
		writeResponse(w, http.StatusOK, nil, mimeNone)
		return
	}

// on success. SSE-C copy headers are ignored.
func (ssec) ParseHTTP(h http.Header) (key [32]byte, err error) {
	if h.Get(xhttp.AmzServerSideEncryptionCustomerAlgorithm) != xhttp.AmzEncryptionAES {
		return key, ErrInvalidCustomerAlgorithm
	}
	if h.Get(xhttp.AmzServerSideEncryptionCustomerKey) == "" {
		return key, ErrMissingCustomerKey
	}
	if h.Get(xhttp.AmzServerSideEncryptionCustomerKeyMD5) == "" {
		return key, ErrMissingCustomerKeyMD5