private Downloader StartDownload(FSItem item, string path)
{
var downloader = new Downloader(item, path);
lock (DownloadersLock)
{
if (Downloaders.TryGetValue(item.Path, out Downloader result))
{
if (result.Task == null)
{
throw new Exception("Downloader Task is Null");
}
return(result);
}
Directory.CreateDirectory(cachePath);
var fileinfo = new FileInfo(path);
if (fileinfo.Exists && fileinfo.Length == item.Length)
{
return(Downloader.CreateCompleted(item, path, item.Length));
}
Stream writer;
if (!fileinfo.Exists || fileinfo.Length < item.Length)
{
writer = new FileStream(
path,
FileMode.Append,
FileAccess.Write,
FileShare.ReadWrite,
4096,
FileOptions.Asynchronous | FileOptions.SequentialScan);
if (writer.Length > 0)
{
Log.Warn(
$"File was not totally downloaded before. Should be {item.Length} but was {writer.Length}: {item.Path} - {item.Id}");
downloader.Downloaded = writer.Length;
}
}
else
{
writer = new FileStream(
path,
FileMode.Create,
FileAccess.Write,
FileShare.ReadWrite,
4096,
FileOptions.Asynchronous | FileOptions.SequentialScan);
}
downloader.Task = Task.Factory.StartNew(async() => await Download(item, writer, downloader), TaskCreationOptions.LongRunning);
Downloaders.Add(item.Path, downloader);
return(downloader);
}
}
private Downloader StartDownload(FSItem item, string path)
{
if (item.Length == 0)
{
Log.Error($"Downloader expected length Zero: {item.Name} - {item.Id}");
}
var downloader = new Downloader(item, path);
Stream writer;
lock (downloadersLock)
{
Downloader result;
if (downloaders.TryGetValue(item.Path, out result))
{
if (result.Task == null)
{
throw new Exception("Downloader Task is Null");
}
return(result);
}
Directory.CreateDirectory(cachePath);
writer = new FileStream(path, FileMode.Append, FileAccess.Write, FileShare.ReadWrite, 4096, FileOptions.Asynchronous | FileOptions.SequentialScan);
if (writer.Length == item.Length)
{
writer.Close();
return(Downloader.CreateCompleted(item, path, item.Length));
}
if (writer.Length > 0)
{
Log.Warn($"File was not totally downloaded before. Should be {item.Length} but was {writer.Length}: {path}");
downloader.Downloaded = writer.Length;
}
downloader.Task = Task.Factory.StartNew(async() => await Download(item, writer, downloader), TaskCreationOptions.LongRunning);
downloaders.Add(item.Path, downloader);
return(downloader);
}
}
