public static void LoadFace(ILoadFace loadFace)
{
if (!LoadFormCache(loadFace))
{
Enqueue(loadFace);
}
}
public static void LoadFaceWithKnownUri(ILoadFace loadFace, string backupUri)
{
if (LoadFormCache(loadFace))
{
return;
}
Uri uri = new Uri(backupUri);
Task.Factory.StartNew(() =>
{
FaceCache newFaceCache = new FaceCache(uri, loadFace);
//newFaceCache.ApplyTo(loadFace);
lock (FaceCacheDict)
{
if (!FaceCacheDict.ContainsKey(loadFace.UserId))
{
FaceCacheDict.Add(loadFace.UserId, newFaceCache);
}
}
CleanCache();
CachedCountChanged?.Invoke(FaceCacheDict.Count);
});
}
public static void Enqueue(ILoadFace loadFace)
{
Action action = new Action(() =>
{
LoadFaceAndWait(loadFace);
CleanCache();
CachedCountChanged?.Invoke(FaceCacheDict.Count);
});
AppendFaceUriRequest(action);
}
public static bool LoadFormCache(ILoadFace loadFace)
{
if (FaceCacheDict.ContainsKey(loadFace.UserId))
{
FaceCache faceCache = FaceCacheDict[loadFace.UserId];
faceCache.Expire = DateTime.UtcNow.AddMinutes(30);
faceCache.ApplyTo(loadFace);
return(true);
}
return(false);
}
public void ApplyTo(ILoadFace loadFace)
{
if (IsLoading)
{
DownloadCompleted += (object sender, BitmapImage e) =>
{
loadFace.Dispatcher.Invoke(() =>
{
loadFace.SetFace(e);
});
};
}
else
{
loadFace.Dispatcher.Invoke(() =>
{
loadFace.SetFace(FaceImage);
});
}
}
private static void LoadFaceAndWait(ILoadFace loadFace)
{
if (FaceCacheDict.ContainsKey(loadFace.UserId))
{
FaceCache faceCache = FaceCacheDict[loadFace.UserId];
faceCache.Expire = DateTime.UtcNow.AddMinutes(30);
faceCache.ApplyTo(loadFace);
}
else
{
if (DateTime.Now < bolckUntil)
{
return;
}
//DateTime startTime = DateTime.UtcNow;
Uri uri;
while (true)
{
try
{
uri = LoadFaceUriFromApi(loadFace.UserId);
break;
}
catch (WebException ex)
{
if (ex.Status == WebExceptionStatus.Timeout)
{
Console.WriteLine(ex);
Thread.Sleep(1000);
}
else if (ex.Response != null && ((HttpWebResponse)ex.Response).StatusCode == HttpStatusCode.PreconditionFailed)
{
bolckUntil = DateTime.Now.AddMinutes(blockMinutes);
Console.WriteLine($"Face API has been blocked, expected until {bolckUntil}");
return;
}
else
{
Console.WriteLine(ex);
return;
}
}
}
if (uri != null)
{
FaceCache faceCache = new FaceCache(uri, loadFace);
//faceCache.ApplyTo(loadFace);
lock (FaceCacheDict)
{
if (!FaceCacheDict.ContainsKey(loadFace.UserId))
{
FaceCacheDict.Add(loadFace.UserId, faceCache);
}
}
}
//DateTime endTime = DateTime.UtcNow;
//TimeSpan timeSpan = endTime - startTime;
//int waitTime = requestInterval - (int)timeSpan.TotalMilliseconds;
//if (waitTime < 0)
// waitTime = 0;
//Thread.Sleep(waitTime);
Thread.Sleep(requestInterval);
}
}
public FaceCache(Uri uri, ILoadFace owner)
{
uri = new Uri(uri.AbsoluteUri + "@24w_24h_1c_100q.jpg");
IsLoading = true;
Expire = DateTime.UtcNow.AddMinutes(30);
Task.Factory.StartNew(() =>
{
MemoryStream memoryStream = null;
int retryCounter = 0;
while (retryCounter < 3)
{
try
{
HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.Create(uri);
httpWebRequest.ServicePoint.ConnectionLimit = 16;
using (HttpWebResponse httpWebResponse = (HttpWebResponse)httpWebRequest.GetResponse())
{
using (Stream stream = httpWebResponse.GetResponseStream())
{
memoryStream = new MemoryStream();
stream.CopyTo(memoryStream);
memoryStream.Position = 0;
}
}
break;
}
catch (WebException ex)
{
Console.WriteLine(ex);
if (memoryStream != null)
{
memoryStream.Dispose();
memoryStream = null;
}
if (ex.Response != null && ((HttpWebResponse)ex.Response).StatusCode == HttpStatusCode.NotFound)
{
break;
}
retryCounter++;
}
catch (Exception ex)
{
Console.WriteLine(ex);
if (memoryStream != null)
{
memoryStream.Dispose();
memoryStream = null;
}
break;
}
}
if (memoryStream == null)
{
return;
}
owner.Dispatcher.Invoke(() =>
{
try
{
BitmapImage bitmapImage = new BitmapImage();
bitmapImage.BeginInit();
bitmapImage.StreamSource = memoryStream;
bitmapImage.CacheOption = BitmapCacheOption.OnLoad;
bitmapImage.EndInit();
bitmapImage.Freeze();
FaceImage = bitmapImage;
memoryStream.Close();
}
catch (Exception ex)
{
Console.WriteLine(ex);
memoryStream.Close();
}
});
IsLoading = false;
DownloadCompleted?.Invoke(this, FaceImage);
ApplyTo(owner);
});
}
