/// <summary>
/// Tries to retrieve the geolocation information online.
/// </summary>
/// <returns>The retrieved geolocation information if successful, otherwise <c>null</c>.</returns>
private GeoInformation TryRetrieveOnline()
{
try
{
HttpWebRequest request = (HttpWebRequest)WebRequest.Create("https://tools.keycdn.com/geo.json");
request.UserAgent = "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:76.0) Gecko/20100101 Firefox/76.0";
request.Proxy = null;
request.Timeout = 15000;
using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
{
using (Stream dataStream = response.GetResponseStream())
{
var geoInfo = JsonHelper.Deserialize <GeoResponse>(dataStream);
GeoInformation g = new GeoInformation
{
IPv4Address = geoInfo.Data.Geo.Ip,
Country = geoInfo.Data.Geo.CountryName,
CountryCode = geoInfo.Data.Geo.CountryCode,
Timezone = geoInfo.Data.Geo.Timezone,
Asn = geoInfo.Data.Geo.Asn.ToString(),
Isp = geoInfo.Data.Geo.Isp
};
return(g);
}
}
}
catch (Exception)
{
return(null);
}
}
/// <summary>
/// Gets the IP geolocation information, either cached or freshly retrieved if more than <see cref="MINIMUM_VALID_TIME"/> minutes have passed.
/// </summary>
/// <returns>The latest IP geolocation information.</returns>
public static GeoInformation GetGeoInformation()
{
var passedTime = new TimeSpan(DateTime.UtcNow.Ticks - _lastSuccessfulLocation.Ticks);
if (_geoInformation == null || passedTime.TotalMinutes > MINIMUM_VALID_TIME)
{
_geoInformation = Retriever.Retrieve();
_lastSuccessfulLocation = DateTime.UtcNow;
}
return(_geoInformation);
}
/// <summary>
/// Tries to retrieve the geolocation information online.
/// </summary>
/// <returns>The retrieved geolocation information if successful, otherwise <c>null</c>.</returns>
private GeoInformation TryRetrieveOnline()
{
try
{
DataContractJsonSerializer jsonSerializer = new DataContractJsonSerializer(typeof(GeoResponse));
HttpWebRequest request = (HttpWebRequest)WebRequest.Create("https://tools.keycdn.com/geo.json");
request.UserAgent = "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:76.0) Gecko/20100101 Firefox/76.0";
request.Proxy = null;
request.Timeout = 10000;
using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
{
using (Stream dataStream = response.GetResponseStream())
{
using (StreamReader reader = new StreamReader(dataStream))
{
string responseString = reader.ReadToEnd();
using (MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(responseString)))
{
var geoInfo = (GeoResponse)jsonSerializer.ReadObject(ms);
GeoInformation g = new GeoInformation
{
IpAddress = geoInfo.Data.Geo.Ip,
Country = geoInfo.Data.Geo.CountryName,
CountryCode = geoInfo.Data.Geo.CountryCode,
Timezone = geoInfo.Data.Geo.Timezone,
Asn = geoInfo.Data.Geo.Asn.ToString(),
Isp = geoInfo.Data.Geo.Isp
};
return(g);
}
}
}
}
}
catch
{
return(null);
}
}
/// <summary>
/// Tries to retrieve the geolocation information locally.
/// </summary>
/// <returns>The retrieved geolocation information if successful, otherwise <c>null</c>.</returns>
private GeoInformation TryRetrieveLocally()
{
try
{
GeoInformation g = new GeoInformation();
// use local information
var cultureInfo = CultureInfo.CurrentUICulture;
var region = new RegionInfo(cultureInfo.LCID);
g.Country = region.DisplayName;
g.CountryCode = region.TwoLetterISORegionName;
g.Timezone = DateTimeHelper.GetLocalTimeZone();
return(g);
}
catch (Exception)
{
return(null);
}
}
