source: stable/HeuristicLab.ExtLibs/HeuristicLab.GeoIP/1.12/GeoIPLookupService.cs

#region License Information
/* HeuristicLab
 * Copyright (C) Heuristic and Evolutionary Algorithms Laboratory (HEAL)
 *
 * This file is part of HeuristicLab.
 *
 * HeuristicLab is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * HeuristicLab is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
 */
#endregion

namespace HeuristicLab.GeoIP {
  public class GeoIPLookupService {

    private LookupService lookupService;

    private static GeoIPLookupService instance;
    public static GeoIPLookupService Instance {
      get {
        if (instance == null) {
          instance = new GeoIPLookupService();
        }
        return instance;
      }
    }

    private GeoIPLookupService() {
      lookupService = new LookupService(Settings.Default.DatabasePath, LookupService.GEOIP_MEMORY_CACHE);
    }

    public string GetCountryCode(string ipAddresse) {
      try {
        Country c = lookupService.getCountry(ipAddresse);
        return c.getCode();
      }
      catch { }
      return string.Empty;
    }

    public string GetCountryName(string ipAddresse) {
      try {
        Country c = lookupService.getCountry(ipAddresse);
        return c.getName();
      }
      catch { }
      return string.Empty;
    }
  }
}