private byte[] Download(GalleryAgent agent, ImageViewState imageViewState, GalleryImagePath imagePath, GalleryParameterValues values)
{
using (var source = new CancellationTokenSource())
{
var cancelSources = this.CancelSources;
try
{
lock (cancelSources)
{
this.ThrowIfCancelRequested();
cancelSources.Add(source);
}
var downloadRequest = agent.CreateImageRequest(imageViewState.View, imagePath, values);
using (var response = agent.Explorer.Request(downloadRequest, source))
{
if (response.StatusCode == HttpStatusCode.ServiceUnavailable)
{
throw new HttpStatusCodeException(response.StatusCode);
}
imageViewState.Length = response.ContentLength;
imageViewState.Position = 0L;
using (var responseStream = response.ReadAsStream())
{
return(this.Download(imageViewState, responseStream));
}
}
}
finally
{
lock (cancelSources)
{
cancelSources.Remove(source);
}
}
}
}
public static byte[] GetFirstThumbnail(this GalleryInfo info, GalleryAgent agent)
{
foreach (var url in info.ThumbnailUrls)
{
if (string.IsNullOrWhiteSpace(url) == false)
{
try
{
var bytes = agent.GetGalleryThumbnail(url);
using (var image = new MagickImage(bytes))
{
return(bytes);
}
}
catch
{
}
}
}
return(null);
}