DocSpace-buildtools/common/ASC.Common/Data/StreamExtension.cs

// (c) Copyright Ascensio System SIA 2010-2022
//
// This program is a free software product.
// You can redistribute it and/or modify it under the terms
// of the GNU Affero General Public License (AGPL) version 3 as published by the Free Software
// Foundation. In accordance with Section 7(a) of the GNU AGPL its Section 15 shall be amended
// to the effect that Ascensio System SIA expressly excludes the warranty of non-infringement of
// any third-party rights.
//
// This program is distributed WITHOUT ANY WARRANTY, without even the implied warranty
// of MERCHANTABILITY or FITNESS FOR A PARTICULAR  PURPOSE. For details, see
// the GNU AGPL at: http://www.gnu.org/licenses/agpl-3.0.html
//
// You can contact Ascensio System SIA at Lubanas st. 125a-25, Riga, Latvia, EU, LV-1021.
//
// The  interactive user interfaces in modified source and object code versions of the Program must
// display Appropriate Legal Notices, as required under Section 5 of the GNU AGPL version 3.
//
// Pursuant to Section 7(b) of the License you must retain the original Product logo when
// distributing the program. Pursuant to Section 7(e) we decline to grant you any rights under
// trademark law for use of our trademarks.
//
// All the Product's GUI elements, including illustrations and icon sets, as well as technical writing
// content are licensed under the terms of the Creative Commons Attribution-ShareAlike 4.0
// International. See the License terms at http://creativecommons.org/licenses/by-sa/4.0/legalcode

namespace ASC.Common.Data;

public static class StreamExtension
{
    public const int BufferSize = 2048; //NOTE: set to 2048 to fit in minimum tcp window

    public static void StreamCopyTo(this Stream srcStream, Stream dstStream, int length)
    {
        ArgumentNullException.ThrowIfNull(srcStream);
        ArgumentNullException.ThrowIfNull(dstStream);

        var buffer = new byte[BufferSize];
        var totalRead = 0;
        int readed;

        while ((readed = srcStream.Read(buffer, 0, length - totalRead > BufferSize ? BufferSize : length - totalRead)) > 0 && totalRead < length)
        {
            dstStream.Write(buffer, 0, readed);
            totalRead += readed;
        }
    }
}