public async static Task <byte[]> ComputeHash <T>(Stream stream) where T : HashAlgorithm, new()
{
// Init
var alg = new T();
long total = 0;
byte[] block = new byte[1024 * 1024]; // 1 MB at a time, just for smoother progress
long len = stream.Length;
if (len > 0)
{
string name = stream is FileStream ? $"Calculating SHA256 of '{(stream as FileStream).Name}'" : $"Calculatig SHA256 of {len} byte data";
ProgressJob job = new ProgressJob(name, len, 0);
job.Start();
while (total < len)
{
// For each block:
int howMany = await stream.ReadAsync(block, 0, block.Length).ConfigureAwait(false);
total += howMany;
if (total >= len)
{
alg.TransformFinalBlock(block, 0, howMany);
job.UpdateProgress(howMany);
break;
}
else
{
alg.TransformBlock(block, 0, howMany, null, 0);
job.UpdateProgress(howMany);
}
}
// Get the has code
byte[] hash = alg.Hash;
job.Finish();
alg.Dispose();
return(hash);
}
string text = "Tried to hash empty stream";
if (stream is FileStream)
{
text += $" (File: {(stream as FileStream).Name}";
}
throw new Exception(text);
}
private void JobFinished(ProgressJob job)
{
JobTracker j = jobs[job];
//jobs.Remove(job);
Dispatcher?.InvokeOrExecute(delegate
{
DownloadsPanel.Children.Remove(j.Container);
DownloadsPanel.Children.Insert(DownloadsPanel.Children.Count, j.Container);
});
if (job is DownloadJob dl)
{
logger.Info($"Finished downloading file '{dl.FileName}'.");
}
else
{
logger.Info($"Finished task '{job.JobName}'.");
}
}
private void JobStarted(ProgressJob job)
{
JobTracker tracker = new JobTracker {
Job = job
};
jobs.Add(job, tracker);
Dispatcher?.InvokeOrExecute(delegate
{
var p = new StackPanel();
tracker.Container = p;
// New progress bar
ProgressBar bar = new ProgressBar
{
Minimum = 0, Maximum = job.ExpectedSize, Height = 25, Background = Brushes.LightGray,
};
// Bind the Progress value to the Value property
bar.SetBinding(ProgressBar.ValueProperty,
new Binding("ProgressCompleted")
{
Source = job,
Mode = BindingMode.OneWay,
UpdateSourceTrigger = UpdateSourceTrigger.PropertyChanged,
});
var colorConverter = new DownloadProgressColorConverter();
bar.SetBinding(ProgressBar.ForegroundProperty,
new Binding("Status")
{
Source = job,
Mode = BindingMode.OneWay,
UpdateSourceTrigger = UpdateSourceTrigger.PropertyChanged,
Converter = colorConverter,
});
bar.MouseDoubleClick += (s, a) => job.Cancel();
TextBlock t = new TextBlock();
t.SetBinding(TextBlock.TextProperty,
new Binding("ProgressSinceLastUpdate")
{
Source = job,
Mode = BindingMode.OneWay,
UpdateSourceTrigger = UpdateSourceTrigger.PropertyChanged,
Converter = new DownloadProgressTextConverter(job)
});
p.Children.Add(bar);
p.Children.Add(t);
p.UpdateLayout();
DownloadsPanel.Children.Insert(0, p);
DownloadsPanel.ScrollOwner?.ScrollToTop();
DownloadsPanel.UpdateLayout();
});
if (job is FileWriteJob dj)
{
string kind = dj is DownloadJob ? "download" : "file write";
if (job.ProgressCompleted == 0)
{
logger.Info($"Starting {kind} of size {Miscellaneous.ToFileSize(job.ExpectedSize)}, File: '{dj.FileName}'.");
}
else
{
logger.Info($"Resuming {kind} at {Miscellaneous.ToFileSize(job.ProgressCompleted)}/{Miscellaneous.ToFileSize(job.ExpectedSize)}, File: '{dj.FileName}'.");
}
}
else
{
logger.Info($"Starting job '{job.JobName}'");
}
}
public DownloadProgressTextConverter(ProgressJob job)
{
this.job = job;
}
private void JobProgress(ProgressJob download, int progressSinceLast)
{
//Download dl = downloads[download.FileName];
}
