/// <summary>
/// Test latency (ping) to server
/// </summary>
/// <returns>Latency in milliseconds (ms)</returns>
public int TestServerLatency(Server server, int retryCount = 3)
{
var latencyUri = CreateTestUrl(server, "latency.txt");
var timer = new Stopwatch();
using (var client = new SpeedTestWebClient())
{
for (var i = 0; i < retryCount; i++)
{
string testString;
try
{
timer.Start();
testString = client.DownloadString(latencyUri);
}
catch (WebException)
{
continue;
}
finally
{
timer.Stop();
}
if (!testString.StartsWith("test=test"))
{
throw new InvalidOperationException("Server returned incorrect test string for latency.txt");
}
}
}
return((int)timer.ElapsedMilliseconds / retryCount);
}
private static double TestSpeed <T>(IEnumerable <T> testData, Func <WebClient, T, Task <int> > doWork, int concurencyCount = 2)
{
var timer = new Stopwatch();
var throttler = new SemaphoreSlim(concurencyCount);
timer.Start();
var downloadTasks = testData.Select(async data =>
{
await throttler.WaitAsync().ConfigureAwait(false);
var client = new SpeedTestWebClient();
try
{
var size = await doWork(client, data).ConfigureAwait(false);
return(size);
}
finally
{
client.Dispose();
throttler.Release();
}
}).ToArray();
Task.WaitAll(downloadTasks);
timer.Stop();
double totalSize = downloadTasks.Sum(task => task.Result);
return((totalSize * 8 / 1024) / ((double)timer.ElapsedMilliseconds / 1000));
}
/// <summary>
/// Download speedtest.net settings
/// </summary>
/// <returns>speedtest.net settings</returns>
private void LoadSettings()
{
using (var client = new SpeedTestWebClient())
{
var settings = client.GetConfig <Settings>(ConfigUrl);
var serversConfig = client.GetConfig <ServersList>(ServersUrl);
serversConfig.CalculateDistances(settings.Client.GeoCoordinate);
settings.Servers = serversConfig.Servers.OrderBy(s => s.Distance).ToList();
_settings = settings;
}
}