defaultExpiryDuration, err := time.ParseDuration(timeout)
	if err != nil {
		defaultExpiryDuration = time.Hour
	}
	if timeout == "" && dsecs != "" {
		expirySecs, err := strconv.ParseInt(dsecs, 10, 64)
		if err != nil {
			return 0, auth.ErrInvalidDuration
		}

		// The duration, in seconds, of the role session.
		// The value can range from 900 seconds (15 minutes)
		// up to 365 days.

		if sizeStr, ok := r.Header[xhttp.AmzDecodedContentLength]; ok {
			if sizeStr[0] == "" {
				writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrMissingContentLength), r.URL)
				return
			}
			size, err = strconv.ParseInt(sizeStr[0], 10, 64)
			if err != nil {
				writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
				return
			}
		}
	}

	if size == -1 {

	maxVerStr := env.Get(EnvAPIObjectMaxVersions, "")
	if maxVerStr == "" {
		maxVerStr = env.Get(EnvAPIObjectMaxVersionsLegacy, kvs.Get(apiObjectMaxVersions))
	}
	if maxVerStr != "" {
		maxVersions, err := strconv.ParseInt(maxVerStr, 10, 64)
		if err != nil {
			return cfg, err
		}
		if maxVersions <= 0 {
			return cfg, fmt.Errorf("invalid object max versions value: %v", maxVersions)
		}
		cfg.ObjectMaxVersions = maxVersions

		return ErrInvalidQueryParams
	}

	cred, _, s3Err := checkKeyValid(r, accessKey)
	if s3Err != ErrNone {
		return s3Err
	}

	// Make sure the request has not expired.
	expiresInt, err := strconv.ParseInt(expires, 10, 64)
	if err != nil {
		return ErrMalformedExpires
	}

	// Check if the presigned URL has expired.
	if expiresInt < UTCNow().Unix() {
		return ErrExpiredPresignRequest
	}

			return -1, errInvalidDecompressedSize
		}
		size, err := strconv.ParseInt(sizeStr, 10, 64)
		if err != nil {
			return -1, errInvalidDecompressedSize
		}
		return size, nil
	}
	if _, ok := crypto.IsEncrypted(o.UserDefined); ok {
		sizeStr, ok := o.UserDefined[ReservedMetadataPrefix+"actual-size"]
		if ok {
			size, err := strconv.ParseInt(sizeStr, 10, 64)
			if err != nil {
				return -1, errObjectTampered
			}

		if len(object.ETag[:i]) != 32 {
			return "", errObjectTampered
		}
		if _, err := hex.DecodeString(object.ETag[:32]); err != nil {
			return "", errObjectTampered
		}
		if _, err := strconv.ParseInt(object.ETag[i+1:], 10, 32); err != nil {
			return "", errObjectTampered
		}
		return object.ETag, nil
	}

	etag, err := hex.DecodeString(object.ETag)
	if err != nil {
		return "", err
	}

// ExpToInt64 - convert input interface value to int64.
func ExpToInt64(expI interface{}) (expAt int64, err error) {
	switch exp := expI.(type) {
	case string:
		expAt, err = strconv.ParseInt(exp, 10, 64)
	case float64:
		expAt, err = int64(exp), nil
	case int64:
		expAt, err = exp, nil
	case int:
		expAt, err = int64(exp), nil
	case uint64:
		expAt, err = int64(exp), nil
	case uint:

		if populatedUploadIDs.Contains(uploadID) {
			continue
		}
		// If present, use time stored in ID.
		startTime := time.Now()
		if split := strings.Split(uploadID, "x"); len(split) == 2 {
			t, err := strconv.ParseInt(split[1], 10, 64)
			if err == nil {
				startTime = time.Unix(0, t)
			}
		}
		uploads = append(uploads, MultipartInfo{
			Bucket:    bucket,
			Object:    object,

			return nil, err
		}

		pingIntervalEnv := target.EnvNATSPingInterval
		if k != config.Default {
			pingIntervalEnv = pingIntervalEnv + config.Default + k
		}

		pingInterval, err := strconv.ParseInt(env.Get(pingIntervalEnv, kv.Get(target.NATSPingInterval)), 10, 64)
		if err != nil {
			return nil, err
		}

		queueLimitEnv := target.EnvNATSQueueLimit
		if k != config.Default {