private void DecodeManagerThread()
{
for (; ;)
{
Thread.Sleep(1000 * 3);
if (this.State == ManagerState.Stop)
{
return;
}
BackgroundDownloadItem item = null;
try
{
lock (this.ThisLock)
{
if (_settings.BackgroundDownloadItems.Count > 0)
{
item = _settings.BackgroundDownloadItems
.Where(n => n.State == BackgroundDownloadState.Decoding)
.OrderBy(n => (n.Rank != n.Seed.Rank) ? 0 : 1)
.FirstOrDefault();
}
}
}
catch (Exception)
{
return;
}
if (item == null)
{
continue;
}
try
{
if (item.Rank == 1)
{
if (!_cacheManager.Contains(item.Seed.Key))
{
item.State = BackgroundDownloadState.Downloading;
}
else
{
item.State = BackgroundDownloadState.Decoding;
if (item.Rank < item.Seed.Rank)
{
string fileName = null;
bool largeFlag = false;
try
{
using (FileStream stream = BackgroundDownloadManager.GetUniqueFileStream(Path.Combine(_workDirectory, "index")))
using (ProgressStream decodingProgressStream = new ProgressStream(stream, (object sender, long readSize, long writeSize, out bool isStop) =>
{
isStop = (this.State == ManagerState.Stop || !_settings.BackgroundDownloadItems.Contains(item));
if (!isStop && (stream.Length > item.Seed.Length))
{
isStop = true;
largeFlag = true;
}
}, 1024 * 1024, true))
{
fileName = stream.Name;
_cacheManager.Decoding(decodingProgressStream, item.Seed.CompressionAlgorithm, item.Seed.CryptoAlgorithm, item.Seed.CryptoKey,
new KeyCollection()
{
item.Seed.Key
});
}
}
catch (StopIoException)
{
if (File.Exists(fileName))
{
File.Delete(fileName);
}
if (largeFlag)
{
throw new Exception();
}
continue;
}
catch (Exception)
{
if (File.Exists(fileName))
{
File.Delete(fileName);
}
throw;
}
Index index;
using (FileStream stream = new FileStream(fileName, FileMode.Open))
{
index = Index.Import(stream, _bufferManager);
}
File.Delete(fileName);
lock (this.ThisLock)
{
this.UncheckState(item.Index);
item.Index = index;
this.CheckState(item.Index);
foreach (var group in item.Index.Groups)
{
foreach (var key in group.Keys)
{
_cacheManager.Lock(key);
}
}
item.Indexes.Add(index);
item.Rank++;
item.State = BackgroundDownloadState.Downloading;
}
}
else
{
bool largeFlag = false;
object value = null;
try
{
using (Stream stream = new BufferStream(_bufferManager))
using (ProgressStream decodingProgressStream = new ProgressStream(stream, (object sender, long readSize, long writeSize, out bool isStop) =>
{
isStop = (this.State == ManagerState.Stop || !_settings.BackgroundDownloadItems.Contains(item));
if (!isStop && (stream.Length > item.Seed.Length))
{
isStop = true;
largeFlag = true;
}
}, 1024 * 1024, true))
{
_cacheManager.Decoding(decodingProgressStream, item.Seed.CompressionAlgorithm, item.Seed.CryptoAlgorithm, item.Seed.CryptoKey,
new KeyCollection()
{
item.Seed.Key
});
if (stream.Length != item.Seed.Length)
{
throw new Exception();
}
stream.Seek(0, SeekOrigin.Begin);
if (item.Type == BackgroundItemType.Link)
{
value = Link.Import(stream, _bufferManager);
}
else if (item.Type == BackgroundItemType.Store)
{
value = Store.Import(stream, _bufferManager);
}
}
}
catch (StopIoException)
{
if (largeFlag)
{
throw new Exception();
}
continue;
}
catch (Exception)
{
throw;
}
lock (this.ThisLock)
{
item.Value = value;
if (item.Seed.Key != null)
{
_cacheManager.Unlock(item.Seed.Key);
}
foreach (var index in item.Indexes)
{
foreach (var group in index.Groups)
{
foreach (var key in group.Keys)
{
_cacheManager.Unlock(key);
}
}
}
item.Indexes.Clear();
item.State = BackgroundDownloadState.Completed;
}
}
}
}
else
{
if (!item.Index.Groups.All(n => _existManager.GetCount(n) >= n.InformationLength))
{
item.State = BackgroundDownloadState.Downloading;
}
else
{
List <Key> keys = new List <Key>();
try
{
foreach (var group in item.Index.Groups.ToArray())
{
keys.AddRange(_cacheManager.ParityDecoding(group, (object state2) =>
{
return(this.State == ManagerState.Stop || !_settings.BackgroundDownloadItems.Contains(item));
}));
}
}
catch (StopException)
{
continue;
}
item.State = BackgroundDownloadState.Decoding;
if (item.Rank < item.Seed.Rank)
{
string fileName = null;
bool largeFlag = false;
try
{
using (FileStream stream = BackgroundDownloadManager.GetUniqueFileStream(Path.Combine(_workDirectory, "index")))
using (ProgressStream decodingProgressStream = new ProgressStream(stream, (object sender, long readSize, long writeSize, out bool isStop) =>
{
isStop = (this.State == ManagerState.Stop || !_settings.BackgroundDownloadItems.Contains(item));
if (!isStop && (stream.Length > item.Seed.Length))
{
isStop = true;
largeFlag = true;
}
}, 1024 * 1024, true))
{
fileName = stream.Name;
_cacheManager.Decoding(decodingProgressStream, item.Index.CompressionAlgorithm, item.Index.CryptoAlgorithm, item.Index.CryptoKey,
new KeyCollection(keys));
}
}
catch (StopIoException)
{
if (File.Exists(fileName))
{
File.Delete(fileName);
}
if (largeFlag)
{
throw new Exception();
}
continue;
}
catch (Exception)
{
if (File.Exists(fileName))
{
File.Delete(fileName);
}
throw;
}
Index index;
using (FileStream stream = new FileStream(fileName, FileMode.Open))
{
index = Index.Import(stream, _bufferManager);
}
File.Delete(fileName);
lock (this.ThisLock)
{
this.UncheckState(item.Index);
item.Index = index;
this.CheckState(item.Index);
foreach (var group in item.Index.Groups)
{
foreach (var key in group.Keys)
{
_cacheManager.Lock(key);
}
}
item.Indexes.Add(index);
item.Rank++;
item.State = BackgroundDownloadState.Downloading;
}
}
else
{
item.State = BackgroundDownloadState.Decoding;
bool largeFlag = false;
object value = null;
try
{
using (Stream stream = new BufferStream(_bufferManager))
using (ProgressStream decodingProgressStream = new ProgressStream(stream, (object sender, long readSize, long writeSize, out bool isStop) =>
{
isStop = (this.State == ManagerState.Stop || !_settings.BackgroundDownloadItems.Contains(item));
if (!isStop && (stream.Length > item.Seed.Length))
{
isStop = true;
largeFlag = true;
}
}, 1024 * 1024, true))
{
_cacheManager.Decoding(decodingProgressStream, item.Index.CompressionAlgorithm, item.Index.CryptoAlgorithm, item.Index.CryptoKey,
new KeyCollection(keys));
if (stream.Length != item.Seed.Length)
{
throw new Exception();
}
stream.Seek(0, SeekOrigin.Begin);
if (item.Type == BackgroundItemType.Link)
{
value = Link.Import(stream, _bufferManager);
}
else if (item.Type == BackgroundItemType.Store)
{
value = Store.Import(stream, _bufferManager);
}
}
}
catch (StopIoException)
{
if (largeFlag)
{
throw new Exception();
}
continue;
}
catch (Exception)
{
throw;
}
lock (this.ThisLock)
{
item.Value = value;
if (item.Seed.Key != null)
{
_cacheManager.Unlock(item.Seed.Key);
}
foreach (var index in item.Indexes)
{
foreach (var group in index.Groups)
{
foreach (var key in group.Keys)
{
_cacheManager.Unlock(key);
}
}
}
item.Indexes.Clear();
item.State = BackgroundDownloadState.Completed;
}
}
}
}
}
catch (Exception e)
{
if (_cacheManager.Contains(item.Seed.Key))
{
ArraySegment <byte> buffer = new ArraySegment <byte>();
try
{
buffer = _cacheManager[item.Seed.Key];
}
catch (Exception)
{
}
finally
{
if (buffer.Array != null)
{
_bufferManager.ReturnBuffer(buffer.Array);
}
}
}
foreach (var index in item.Indexes)
{
foreach (var group in index.Groups)
{
foreach (var key in group.Keys)
{
if (this.State == ManagerState.Stop)
{
return;
}
if (!_cacheManager.Contains(key))
{
continue;
}
ArraySegment <byte> buffer = new ArraySegment <byte>();
try
{
buffer = _cacheManager[key];
}
catch (Exception)
{
}
finally
{
if (buffer.Array != null)
{
_bufferManager.ReturnBuffer(buffer.Array);
}
}
}
}
}
item.State = BackgroundDownloadState.Error;
Log.Error(e);
}
}
}
