// Empty values for object lock and retention can be skipped.
		if v == "" && equals(k, xhttp.AmzObjectLockMode, xhttp.AmzObjectLockRetainUntilDate) {
			continue
		}

		if stringsHasPrefixFold(k, ReservedMetadataPrefixLower) {
			// Do not need to send any internal metadata
			// values to client.
			continue
		}

			AccessKeyID: cred.AccessKey,
		},
	}
	return eventData, nil
}

func fwdHeadersToS3(h http.Header, w http.ResponseWriter) {
	const trim = "x-amz-fwd-header-"
	for k, v := range h {
		if stringsHasPrefixFold(k, trim) {
			w.Header()[k[len(trim):]] = v
		}
	}
}

func fwdStatusToAPIError(statusCode int, resp *http.Response) *APIError {
	if statusCode < http.StatusBadRequest {
		return nil
	}

		newEvent.S3.Object.ContentType = args.Object.ContentType
		newEvent.S3.Object.UserMetadata = make(map[string]string, len(args.Object.UserDefined))
		for k, v := range args.Object.UserDefined {
			if stringsHasPrefixFold(strings.ToLower(k), ReservedMetadataPrefixLower) {
				continue
			}
			newEvent.S3.Object.UserMetadata[k] = v
		}
	}

	return newEvent
}

func sendEvent(args eventArgs) {

func checkMetaHeaders(signedHeadersMap http.Header, r *http.Request) APIErrorCode {
	// check values from http header
	for k, val := range r.Header {
		if stringsHasPrefixFold(k, "X-Amz-Meta-") {
			if signedHeadersMap.Get(k) == val[0] {
				continue
			}
			return ErrUnsignedHeaders
		}
	}

	return ErrNone