DocSpace-buildtools/common/ASC.Common/Web/DisposableHttpContext.cs

/*
 *
 * (c) Copyright Ascensio System Limited 2010-2018
 *
 * This program is freeware. You can redistribute it and/or modify it under the terms of the GNU 
 * General Public License (GPL) version 3 as published by the Free Software Foundation (https://www.gnu.org/copyleft/gpl.html). 
 * In accordance with Section 7(a) of the GNU GPL 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 more details, see GNU GPL at https://www.gnu.org/copyleft/gpl.html
 *
 * You can contact Ascensio System SIA by email at sales@onlyoffice.com
 *
 * The interactive user interfaces in modified source and object code versions of ONLYOFFICE must display 
 * Appropriate Legal Notices, as required under Section 5 of the GNU GPL version 3.
 *
 * Pursuant to Section 7 § 3(b) of the GNU GPL you must retain the original ONLYOFFICE logo which contains 
 * relevant author attributions when distributing the software. If the display of the logo in its graphic 
 * form is not reasonably feasible for technical reasons, you must include the words "Powered by ONLYOFFICE" 
 * in every copy of the program you distribute. 
 * Pursuant to Section 7 § 3(e) we decline to grant you any rights under trademark law for use of our trademarks.
 *
*/

namespace ASC.Common.Web;

public class DisposableHttpContext : IDisposable
{
    private const string Key = "disposable.key";

    public object this[string key]
    {
        get => Items.ContainsKey(key) ? Items[key] : null;
        set
        {
            if (value == null) throw new ArgumentNullException();
            if (!(value is IDisposable)) throw new ArgumentException("Only IDisposable may be added!");
            Items[key] = (IDisposable)value;
        }
    }

    private Dictionary<string, IDisposable> Items
    {
        get
        {
            var table = (Dictionary<string, IDisposable>)_context.Items[Key];

            if (table == null)
            {
                table = new Dictionary<string, IDisposable>(1);
                _context.Items.Add(Key, table);
            }

            return table;
        }
    }

    private readonly HttpContext _context;
    private bool _isDisposed;

    public DisposableHttpContext(HttpContext ctx) =>
        _context = ctx ?? throw new ArgumentNullException(nameof(ctx));

    public void Dispose()
    {
        if (!_isDisposed)
        {
            foreach (var item in Items.Values)
            {
                try
                {
                    item.Dispose();
                }
                catch { }
            }

            _isDisposed = true;
        }
    }
}