/// <summary>
/// Chooses a server from the selected server city according to server weights.
/// </summary>
/// <param name="serverCityItem">Selected server city for connection.</param>
/// <returns>VPN server selected for connection.</returns>
public VPNServer SelectServer(Models.CityServerListItem serverCityItem)
{
var city = serverCityItem.City;
Dictionary <int, VPNServer> servers = new Dictionary <int, VPNServer>();
servers = GetServerItems().Where(x => x.Value.City == city).ToDictionary(x => x.Key, x => x.Value);
var weightSum = servers.Sum(server => server.Value.Weight);
Random rand = new Random();
int r = rand.Next(0, weightSum + 1);
VPNServer serverSelection = new VPNServer();
foreach (var server in servers)
{
r -= server.Value.Weight;
if (r <= 0)
{
serverSelection = server.Value;
break;
}
}
return(serverSelection);
}
/// <summary>
/// Loads the server list from a file.
/// </summary>
/// <param name="filePath">Path of the file containing the server list.</param>
public void LoadServerDataFromFile(string filePath)
{
string jsonStringData = string.Empty;
JSONStructures.ServerList servers;
try
{
jsonStringData = File.ReadAllText(filePath);
JObject jObjectServerData = JObject.Parse(jsonStringData);
servers = JsonConvert.DeserializeObject <JSONStructures.ServerList>(jObjectServerData.ToString());
}
catch (Exception)
{
return;
}
var newVPNServers = new Dictionary <int, VPNServer>();
var serverIndex = 0;
foreach (var country in servers.Countries)
{
foreach (var city in country.Cities)
{
try
{
foreach (var server in city.Servers)
{
var portRanges = new List <List <int> > {
new List <int> {
53, 53
}
};
try
{
portRanges = new List <List <int> >();
// Port range parsing
foreach (var portRange in server.PortRanges)
{
portRanges.Add(new List <int> {
portRange.First(), portRange.Last()
});
}
}
catch (Exception e)
{
ErrorHandling.ErrorHandler.Handle(e, ErrorHandling.LogLevel.Debug);
}
var newVPNServer = new VPNServer
{
IPv4Address = server.IPv4Gateway,
IPv6Address = server.IPv6Gateway,
Endpoint = server.IPv4EndpointAddress,
DNSServerAddress = server.IPv4Gateway,
Ports = portRanges,
PublicKey = server.PublicKey,
Weight = server.Weight,
Name = server.Hostname,
Country = country.Name,
City = city.Name,
};
newVPNServers[serverIndex] = newVPNServer;
serverIndex++;
}
}
catch (NullReferenceException)
{
continue;
}
}
}
// Sort the server list
newVPNServers = SortServerList(newVPNServers);
List <Models.CityServerListItem> newServerData = new List <Models.CityServerListItem>();
var groupedServersByCity = newVPNServers.GroupBy(s => s.Value.City).ToDictionary(grp => grp.Key, grp => grp.ToList());
foreach (var serverCity in groupedServersByCity)
{
List <Models.ServerListItem> cityServers = new List <Models.ServerListItem>();
for (int i = 0; i < serverCity.Value.Count; i++)
{
cityServers.Add(new Models.ServerListItem
{
Country = serverCity.Value[i].Value.Country,
City = serverCity.Value[i].Value.City,
Name = serverCity.Value.Count > 1 ? string.Format("{0} {1}", serverCity.Value[i].Value.City, i + 1) : serverCity.Value[i].Value.City,
Code = serverCity.Value[i].Value.Name,
Endpoint = serverCity.Value[i].Value.Endpoint,
});
}
newServerData.Add(new Models.CityServerListItem
{
Country = serverCity.Value[0].Value.Country,
City = serverCity.Key,
Servers = cityServers,
});
}
serverCityData = newServerData;
vpnServers = newVPNServers;
}
