/// <summary>
/// RetreiveThreatProperties method implementation
/// </summary>
protected virtual ThreatInformations RetreiveThreatProperties(ThreatInformations infos)
{
Dictionary <string, DateTime> dic = DecodeThreatData(infos.BLOB);
var xnextupdate = dic["NextUpdate"];
infos.NextUpdate = xnextupdate;
return(infos);
}
/// <summary>
/// Backgroud RefreshThreatMethod method
/// </summary>
private void RefreshThreatMethod()
{
using (_threatcanceller.Token.Register(Thread.CurrentThread.Abort))
{
while (!_threatmustexit)
{
try
{
lock (_threatlock)
{
ThreatInformations infos = GetThreatCache();
if (infos.CanDownload && ((DateTime.Now > Convert.ToDateTime(infos.NextUpdate)) || (!File.Exists(SystemUtilities.ThreatCacheFile))))
{
try
{
infos.BLOB = GetThreatBlob().Result;
}
catch
{
infos.BLOB = null;
}
if (!string.IsNullOrEmpty(infos.BLOB))
{
DateTime oldnextupdate = infos.NextUpdate;
RetreiveThreatProperties(infos);
if ((infos.NextUpdate > oldnextupdate) || (!File.Exists(SystemUtilities.ThreatCacheFile)))
{
SetThreatCache(infos);
}
}
}
}
Thread.Sleep(new TimeSpan(0, 12, 0, 0)); // every 12 hours
}
catch (ThreadAbortException ex)
{
_threatmustexit = true;
_log.WriteEntry(string.Format("error on refresh Threat method : {0}.", ex.Message), EventLogEntryType.Error, 1014);
}
catch (Exception ex)
{
_log.WriteEntry(string.Format("error on refresh Threat method : {0}.", ex.Message), EventLogEntryType.Error, 1014);
Thread.Sleep(new TimeSpan(0, 12, 0, 0)); // every 12 hours
}
}
}
}
/// <summary>
/// GetBLOBPayloadCache method implementation
/// </summary>
protected virtual ThreatInformations GetThreatCache()
{
ThreatInformations infos = new ThreatInformations();
if (File.Exists(SystemUtilities.ThreatCacheFile))
{
infos.BLOB = File.ReadAllText(SystemUtilities.ThreatCacheFile);
return(RetreiveThreatProperties(infos));
}
else
{
infos.CanDownload = true;
infos.BLOB = null;
}
return(infos);
}
/// <summary>
/// SetBLOBPayloadCache method implmentation
/// </summary>
public void SetThreatCache(ThreatInformations infos)
{
File.WriteAllText(SystemUtilities.ThreatCacheFile, infos.BLOB);
ManagementService.UpdateMFAThreatDetectionData(null);
}
