119 lines
4.4 KiB
C#
119 lines
4.4 KiB
C#
// (c) Copyright Ascensio System SIA 2010-2022
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//
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// This program is a free software product.
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// You can redistribute it and/or modify it under the terms
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// of the GNU Affero General Public License (AGPL) version 3 as published by the Free Software
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// Foundation. In accordance with Section 7(a) of the GNU AGPL its Section 15 shall be amended
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// to the effect that Ascensio System SIA expressly excludes the warranty of non-infringement of
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// any third-party rights.
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//
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// This program is distributed WITHOUT ANY WARRANTY, without even the implied warranty
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// of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. For details, see
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// the GNU AGPL at: http://www.gnu.org/licenses/agpl-3.0.html
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//
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// You can contact Ascensio System SIA at Lubanas st. 125a-25, Riga, Latvia, EU, LV-1021.
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//
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// The interactive user interfaces in modified source and object code versions of the Program must
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// display Appropriate Legal Notices, as required under Section 5 of the GNU AGPL version 3.
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//
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// Pursuant to Section 7(b) of the License you must retain the original Product logo when
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// distributing the program. Pursuant to Section 7(e) we decline to grant you any rights under
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// trademark law for use of our trademarks.
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//
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// All the Product's GUI elements, including illustrations and icon sets, as well as technical writing
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// content are licensed under the terms of the Creative Commons Attribution-ShareAlike 4.0
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// International. See the License terms at http://creativecommons.org/licenses/by-sa/4.0/legalcode
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namespace ASC.Geolocation;
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// hack for EF Core
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public static class EntityFrameworkHelper
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{
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public static int Compare(this byte[] b1, byte[] b2)
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{
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throw new Exception("This method can only be used in EF LINQ Context");
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}
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}
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[Scope]
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public class GeolocationHelper
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{
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private readonly IDbContextFactory<CustomDbContext> _dbContextFactory;
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private readonly ILogger<GeolocationHelper> _logger;
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private readonly IHttpContextAccessor _httpContextAccessor;
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private readonly ICache _cache;
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public GeolocationHelper(
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IDbContextFactory<CustomDbContext> dbContextFactory,
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ILogger<GeolocationHelper> logger,
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IHttpContextAccessor httpContextAccessor,
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ICache cache)
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{
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_dbContextFactory = dbContextFactory;
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_logger = logger;
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_httpContextAccessor = httpContextAccessor;
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_cache = cache;
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}
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public IPGeolocationInfo GetIPGeolocation(IPAddress address)
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{
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try
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{
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var cacheKey = $"ip_geolocation_info_${address}";
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var fromCache = _cache.Get<IPGeolocationInfo>(cacheKey);
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if (fromCache != null) return fromCache;
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using var dbContext = _dbContextFactory.CreateDbContext();
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var addrType = address.AddressFamily == System.Net.Sockets.AddressFamily.InterNetwork ? "ipv4" : "ipv6";
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var result = dbContext.DbIPLookup
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.Where(r => r.AddrType == addrType && r.IPStart.Compare(address.GetAddressBytes()) <= 0)
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.OrderByDescending(r => r.IPStart)
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.Select(r => new IPGeolocationInfo
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{
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City = r.City,
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IPEnd = new IPAddress(r.IPEnd),
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IPStart = new IPAddress(r.IPStart),
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Key = r.Country,
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TimezoneOffset = r.TimezoneOffset,
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TimezoneName = r.TimezoneName,
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Continent = r.Continent
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})
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.FirstOrDefault();
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if (result != null)
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{
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_cache.Insert(cacheKey, result, TimeSpan.FromSeconds(15));
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}
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return result ?? IPGeolocationInfo.Default;
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}
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catch (Exception error)
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{
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_logger.ErrorGetIPGeolocation(error);
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}
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return IPGeolocationInfo.Default;
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}
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public IPGeolocationInfo GetIPGeolocationFromHttpContext()
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{
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if (_httpContextAccessor.HttpContext?.Request != null)
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{
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var ip = _httpContextAccessor.HttpContext.Connection.RemoteIpAddress;
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if (!ip.Equals(IPAddress.Loopback))
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{
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_logger.DebugRemoteIpAddress(ip.ToString());
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return GetIPGeolocation(ip);
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}
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}
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return IPGeolocationInfo.Default;
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}
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}
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