private void IDownloader_DownloadStatusChanged(object sender, DownloadEventArgs e)
{
UpdateActiveDownloads();
if (e.Target.Progress.Status == DownloadStatus.Completed)
{
downloads.Remove(e.Target);
PostProcessors.PostProcessorManager.Instance.Run(e.Target);
}
else if (e.Target.Progress.Status == DownloadStatus.Failed)
{
Log.WriteLine($"Download failed: {e.Target.DownloadUri}");
if (File.Exists(e.Target.GetDownloadingPath()))
{
File.Delete(e.Target.GetDownloadingPath());
}
}
if (e.Target.Progress.Status == DownloadStatus.Canceled)
{
downloads.Remove(e.Target);
}
DownloadStatusChanged?.Invoke(this, e);
SaveDownloads();
}
public void Start()
{
if (cancellationToken == null)
{
StartWorkerAsync();
CurrentDownloadItem.Progress.Status = DownloadStatus.Downloading;
DownloadStatusChanged?.Invoke(this, new DownloadEventArgs(CurrentDownloadItem));
}
}
public void Cancel()
{
if (cancellationToken != null)
{
cancellationToken.Cancel();
}
CurrentDownloadItem.Progress.Status = DownloadStatus.Canceled;
DownloadStatusChanged?.Invoke(this, new DownloadEventArgs(CurrentDownloadItem));
}
public virtual void Resume()
{
if (CurrentDownloadItem.Progress.Status != DownloadStatus.Paused)
{
throw new InvalidOperationException();
}
downloader.Resume();
CurrentDownloadItem.Progress.Status = DownloadStatus.Downloading;
DownloadStatusChanged?.Invoke(this, new DownloadEventArgs(CurrentDownloadItem));
}
protected void Downloader_StatusChanged(object sender, EventArgs e)
{
if (downloader.IsDone())
{
CurrentDownloadItem.Progress.Status = DownloadStatus.Completed;
DownloadStatusChanged?.Invoke(this, new DownloadEventArgs(CurrentDownloadItem));
}
if (downloader.HasFailed())
{
CurrentDownloadItem.Progress.Status = DownloadStatus.Failed;
DownloadStatusChanged?.Invoke(this, new DownloadEventArgs(CurrentDownloadItem));
}
}
public void Pause()
{
if (cancellationToken != null)
{
if (CurrentDownloadItem.Progress.Status != DownloadStatus.Downloading && CurrentDownloadItem.Progress.Status != DownloadStatus.Pending)
{
throw new InvalidOperationException();
}
cancellationToken.Cancel();
CurrentDownloadItem.Progress.Status = DownloadStatus.Paused;
DownloadStatusChanged?.Invoke(this, new DownloadEventArgs(CurrentDownloadItem));
}
}
public void SetItem(IDownloadItem item)
{
// I keep making this mistake - the ParseFrom method can return a new IDownloadItem, so then referencing `item` after
// that references the old one, and so setting the values on that doesn't help anything...
CurrentSSDownloadItem = SoulseekDownloadItem.ParseFrom(item);
CurrentSSDownloadItem.DownloadingFilename = HttpUtility.UrlDecode(CurrentSSDownloadItem.DownloadUri.Segments.Last());
CurrentSSDownloadItem.CompletedFilename = CurrentSSDownloadItem.DownloadingFilename;
CurrentSSDownloadItem.Progress = new DownloadProgress
{
BytesTotal = 0,
BytesDownloaded = 0,
Status = DownloadStatus.Pending
};
DownloadStatusChanged?.Invoke(this, new DownloadEventArgs(CurrentDownloadItem));
}
protected virtual void SetItem(IDownloadItem item, Uri actualDownloadUri)
{
CurrentDownloadItem = item;
item.DownloadingFilename = HttpUtility.UrlDecode(actualDownloadUri.Segments.Last());
item.CompletedFilename = item.DownloadingFilename;
downloader = new PausableEventedDownloader(actualDownloadUri, item.GetDownloadingPath());
downloader.ProgressChanged += Downloader_ProgressChanged;
downloader.StatusChanged += Downloader_StatusChanged;
downloader.ReceivedResponseFilename += Downloader_ReceivedResponseFilename;
item.Progress = new DownloadProgress
{
BytesTotal = 0,
BytesDownloaded = 0,
Status = DownloadStatus.Pending
};
// Now it's ready, invoke the handler to get download manager to start (or update)
DownloadStatusChanged?.Invoke(this, new DownloadEventArgs(CurrentDownloadItem));
}
private void DownloadHandler_DownloadUpdated(object sender, EventArgs e)
{
DownloadStatusChanged?.Invoke(this, e);
}
private void ClearDownloadStatus(int id)
{
DownloadStatusChanged?.Invoke(id, "", "", -1);
}
private void ChangeDownloadStatus(int id, string episodeName, float fraction)
{
DownloadStatusChanged?.Invoke(id, episodeName, "", fraction);
}
private void ChangeDownloadStatus(int id, string episodeName, string status)
{
DownloadStatusChanged?.Invoke(id, episodeName, status, -1);
}
public virtual void Cancel()
{
downloader.Stop();
CurrentDownloadItem.Progress.Status = DownloadStatus.Canceled;
DownloadStatusChanged?.Invoke(this, new DownloadEventArgs(CurrentDownloadItem));
}
private async void StartWorkerAsync()
{
if (cancellationToken != null)
{
throw new InvalidOperationException("Cannot start download when cancellation token already exists");
}
cancellationToken = new CancellationTokenSource();
CurrentDownloadItem.Progress.Status = DownloadStatus.Downloading;
FileStream fileStream = null;
Exception thrownException = null;
try
{
FileMode mode = FileMode.CreateNew;
long progress = 0;
if (System.IO.File.Exists(CurrentDownloadItem.GetDownloadingPath()))
{
mode = FileMode.Append;
progress = new FileInfo(CurrentDownloadItem.GetDownloadingPath()).Length;
}
fileStream = new FileStream(CurrentDownloadItem.GetDownloadingPath(), mode);
var task = SoulseekWrapper.Instance.GetClient()?.DownloadAsync(
username: CurrentSSDownloadItem.SoulseekUsername,
filename: CurrentSSDownloadItem.SoulseekFilename,
outputStream: fileStream,
startOffset: progress,
cancellationToken: cancellationToken.Token,
options: new TransferOptions(
stateChanged: (e) =>
{
switch (e.Transfer.State)
{
case TransferStates.TimedOut:
case TransferStates.Rejected:
case TransferStates.Errored:
case TransferStates.Cancelled:
CurrentDownloadItem.Progress.Status = DownloadStatus.Failed;
DownloadStatusChanged?.Invoke(this, new DownloadEventArgs(CurrentDownloadItem));
break;
case TransferStates.Completed:
Log.WriteLine($"Finished {CurrentDownloadItem.DownloadUri}");
break;
default:
break;
}
},
progressUpdated: (e) =>
{
CurrentDownloadItem.Progress.BytesDownloaded = e.Transfer.BytesTransferred;
CurrentDownloadItem.Progress.BytesTotal = e.Transfer.Size;
CurrentDownloadItem.Progress.SpeedTracker.SetProgress(e.Transfer.BytesTransferred);
DownloadProgressChanged?.Invoke(this, new DownloadEventArgs(CurrentDownloadItem));
}
)
);
if (task == null)
{
// TODO...
Log.WriteLine("Did not create task - assuming Soulseek authentication has not been set");
throw new InvalidOperationException("Unable to create download task");
}
await task;
}
catch (Exception ex)
{
Log.WriteLine($"Exception occured during soulseek download for {CurrentSSDownloadItem.SoulseekFilename}: {ex.Message}\n--> Stack trace: {ex.StackTrace}");
thrownException = ex;
}
finally
{
// Dispose of resources
fileStream?.Dispose();
cancellationToken = null;
if (thrownException != null)
{
// Failed
CurrentDownloadItem.Progress.Status = DownloadStatus.Failed;
DownloadStatusChanged?.Invoke(this, new DownloadEventArgs(CurrentDownloadItem));
}
else
{
// Success
CurrentDownloadItem.Progress.Status = DownloadStatus.Completed;
DownloadStatusChanged?.Invoke(this, new DownloadEventArgs(CurrentDownloadItem));
}
}
}