public async ValueTask <byte[]> Get(int freshness, int timeout)
{
bool queryOwner = false;
try
{
if (LastUpdate.AddSeconds(freshness) < DateTime.Now)
{
Logger.Log(LogSeverity.Info, LogType.Downloader, "Updating WebCache", "CachedDownloader");
if (WebQuery == null)
{
queryOwner = true;
Data = null;
WebQuery = new Task(() =>
{
using (var wc = new WebClient())
{
Task.Run(async() =>
{
await Task.Delay(timeout);
if (wc != null)
{
wc.CancelAsync();
}
});
Data = wc.DownloadData(Location);
Logger.Log(LogSeverity.Info, LogType.Downloader, "Download Complete", "CachedDownloader");
}
LastUpdate = DateTime.Now;
});
WebQuery.Start();
}
Logger.Log(LogSeverity.Info, LogType.Downloader, "Waiting for download", "CachedDownloader");
await WebQuery;
}
}
catch (WebException ex)
{
if (ex.Status != WebExceptionStatus.RequestCanceled)
{
Logger.Log(ex, "CachedDownloader");
}
else
{
Logger.Log(LogSeverity.Info, LogType.Downloader, "Download cancelled", "CachedDownloader");
}
}
finally
{
if (queryOwner)
{
WebQuery = null;
}
}
return(Data);
}
