// should not exceed the maximum single Put size (5 GiB)
		lengthRange := postPolicyForm.Conditions.ContentLengthRange
		if lengthRange.Valid {
			hashReader.SetExpectedMin(lengthRange.Min)
			hashReader.SetExpectedMax(lengthRange.Max)
		}
	}

	// Extract metadata to be saved from received Form.
	metadata := make(map[string]string)
	err = extractMetadataFromMime(ctx, textproto.MIMEHeader(formValues), metadata)