2022-01-31 13:56:30 +00:00
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using DbContext = ASC.Core.Common.EF.Context.DbContext;
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2022-02-15 11:52:43 +00:00
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namespace ASC.Geolocation;
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2019-10-21 12:33:02 +00:00
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2022-02-15 11:52:43 +00:00
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public class GeolocationHelper
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{
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public string Dbid { get; set; }
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public ILog Logger { get; }
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private readonly DbContext _dbContext;
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public GeolocationHelper(DbContextManager<DbContext> dbContext, IOptionsMonitor<ILog> option)
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{
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Logger = option.CurrentValue;
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_dbContext = dbContext.Get(Dbid);
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}
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public IPGeolocationInfo GetIPGeolocation(string ip)
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{
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try
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2019-10-10 08:52:21 +00:00
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{
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2022-02-15 11:52:43 +00:00
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var ipformatted = FormatIP(ip);
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var q = _dbContext.DbipLocation
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.Where(r => r.IPStart.CompareTo(ipformatted) <= 0)
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.Where(r => ipformatted.CompareTo(r.IPEnd) <= 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 = r.IPEnd,
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IPStart = 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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})
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.FirstOrDefault();
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return q ?? IPGeolocationInfo.Default;
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}
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catch (Exception error)
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{
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Logger.Error(error);
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}
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return IPGeolocationInfo.Default;
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}
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2019-12-13 13:05:24 +00:00
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2022-02-15 11:52:43 +00:00
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public IPGeolocationInfo GetIPGeolocationFromHttpContext(Microsoft.AspNetCore.Http.HttpContext context)
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{
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if (context != null && context.Request != null)
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{
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var ip = (string)(context.Request.HttpContext.Items["X-Forwarded-For"] ?? context.Request.HttpContext.Items["REMOTE_ADDR"]);
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if (!string.IsNullOrWhiteSpace(ip))
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{
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return GetIPGeolocation(ip);
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2022-02-14 21:02:57 +00:00
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}
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2022-02-15 11:52:43 +00:00
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}
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return IPGeolocationInfo.Default;
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}
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private static string FormatIP(string ip)
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{
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ip = (ip ?? "").Trim();
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if (ip.Contains('.'))
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{
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//ip v4
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if (ip.Length == 15)
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{
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return ip;
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2022-02-14 21:02:57 +00:00
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}
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2022-02-15 11:52:43 +00:00
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return string.Join(".", ip.Split(':')[0].Split('.').Select(s => ("00" + s).Substring(s.Length - 1)).ToArray());
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}
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else if (ip.Contains(':'))
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{
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//ip v6
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if (ip.Length == 39)
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{
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return ip;
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}
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var index = ip.IndexOf("::");
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if (0 <= index)
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{
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ip = ip.Insert(index + 2, new string(':', 8 - ip.Split(':').Length));
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}
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return string.Join(":", ip.Split(':').Select(s => ("0000" + s).Substring(s.Length)).ToArray());
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}
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else
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{
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throw new ArgumentException("Unknown ip " + ip);
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}
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}
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}
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