private void RequestCompleted(Artwork aArtwork)
{
iMutexRequest.WaitOne();
if (iPendingList.Count > 0)
{
iManualResetEvent.Set();
}
iMutexRequest.ReleaseMutex();
iSemaphore.Release();
}
internal void Download(Artwork aArtwork)
{
iMutexRequest.WaitOne();
iPendingList.Remove(aArtwork);
if (!aArtwork.Error && aArtwork.Image == null)
{
iPendingList.Insert(0, aArtwork);
iManualResetEvent.Set();
}
iMutexRequest.ReleaseMutex();
}
private void ProcessRequest(Artwork aArtwork)
{
Trace.WriteLine(Trace.kKinsky, "ArtworkCache.ProcessRequest: Downloading " + aArtwork.UriDownload);
try
{
HttpWebRequest wreq = (HttpWebRequest)WebRequest.Create(aArtwork.UriDownload);
wreq.Proxy = new WebProxy();
wreq.KeepAlive = false;
wreq.Pipelined = false;
wreq.AllowWriteStreamBuffering = true;
WebRequestPool.QueueJob(new JobGetResponse(GetResponseCallback, new WebRequestState(wreq, aArtwork)));
}
catch (Exception e)
{
DownloadError(aArtwork, e.Message);
}
}
public IArtwork Artwork(Uri aUri)
{
Assert.Check(aUri != null);
string query = aUri.Query;
System.Text.RegularExpressions.Regex r = new System.Text.RegularExpressions.Regex(string.Format("(?'before'([?&]{0}=)[0-9][0-9]*)", kSizeQuery));
if (r.IsMatch(query))
{
query = r.Replace(query, string.Format("?{0}={1}", kSizeQuery, iMaxImageSize));
}
Uri uri = aUri;
if (!string.IsNullOrEmpty(aUri.Query))
{
uri = new Uri(aUri.AbsoluteUri.Replace(aUri.Query, query));
}
iMutex.WaitOne();
Artwork value;
if (iArtworkCache.TryGetValue(uri.AbsoluteUri, out value))
{
iArtworkCacheUsage.Remove(uri.AbsoluteUri);
iArtworkCacheUsage.Add(uri.AbsoluteUri);
iMutex.ReleaseMutex();
return value;
}
value = new Artwork(aUri, uri);
iArtworkCache.Add(value.UriDownload.AbsoluteUri, value);
iArtworkCacheUsage.Add(value.UriDownload.AbsoluteUri);
RemoveStaleCacheItems();
iMutex.ReleaseMutex();
Download(value);
return value;
}
private void GetResponseCallback(object aResult)
{
WebRequestState wreq = aResult as WebRequestState;
Artwork artwork = wreq.Artwork;
try
{
HttpWebResponse wresp = (HttpWebResponse)wreq.Request.GetResponse();
try
{
Stream stream = wresp.GetResponseStream();
if (stream != null)
{
try
{
Bitmap image = new Bitmap(stream);
try
{
Image scaledImage = ScaleImage(image);
Image reflectedImage = ReflectImage(scaledImage);
artwork.Image = scaledImage;
artwork.ImageReflected = reflectedImage;
artwork.Error = false;
}
catch (Exception e)
{
DownloadError(artwork, e.Message);
return;
}
image.Dispose();
if (EventUpdated != null)
{
EventUpdated(this, new EventArgsArtwork(artwork));
}
RequestCompleted(artwork);
return;
}
catch (Exception e)
{
DownloadError(artwork, e.Message);
return;
}
finally
{
stream.Close();
}
}
}
catch (Exception e)
{
DownloadError(artwork, e.Message);
return;
}
finally
{
if (wresp != null)
{
wresp.Close();
}
}
}
catch (WebException e)
{
DownloadError(artwork, e.Message);
return;
}
DownloadError(artwork, "Unknown error");
}
public WebRequestState(HttpWebRequest aRequest, Artwork aArtwork)
{
Request = aRequest;
Artwork = aArtwork;
}