void PieceDownloader()
{
var sha1 = SHA1.Create();
int piece;
while ((piece = GetFreePiece()) != -1)
{
try
{
Interlocked.Increment(ref urlShift);
for (var i = 0; i < urls.Count; i++)
{
if (IsAborted)
{
return;
}
var url = urls[(urlShift + i) % urls.Count];
lock (invalidUrl) if (invalidUrl.Contains(url))
{
continue;
}
var pg = new PieceGet(url, torrent.PieceLength * piece, GetPieceLength(piece));
byte[] buf;
bool invalid;
var ok = pg.Download(ref done, out buf, out invalid);
if (invalid)
{
lock (invalidUrl) if (!invalidUrl.Contains(url))
{
invalidUrl.Add(url);
}
}
if (IsAborted)
{
return;
}
if (ok && torrent.Pieces.IsValid(sha1.ComputeHash(buf), piece))
{
var len = GetPieceLength(piece);
var pos = torrent.PieceLength * piece;
//Utils.StartAsync(() =>
//{
lock (file)
{
file.Seek(pos, SeekOrigin.Begin);
file.Write(buf, 0, len);
}
//});
pieceStates[piece] = PieceState.Done;
break;
}
else
{
Trace.TraceWarning("Piece {0} failed for {1}", piece, url);
}
}
}
catch (Exception ex)
{
Trace.TraceError("Error while getting piece {0}:{1}", piece, ex);
}
if (pieceStates[piece] != PieceState.Done)
{
pieceStates[piece] = PieceState.Failed;
}
}
lock (block) Monitor.Pulse(block);
}
void PieceDownloader()
{
var sha1 = SHA1.Create();
int piece;
while ((piece = GetFreePiece()) != -1)
{
try
{
Interlocked.Increment(ref urlShift);
for (var i = 0; i < urls.Count; i++)
{
if (IsAborted) return;
var url = urls[(urlShift + i)%urls.Count];
lock (invalidUrl) if (invalidUrl.Contains(url)) continue;
var pg = new PieceGet(url, torrent.PieceLength*piece, GetPieceLength(piece));
byte[] buf;
bool invalid;
var ok = pg.Download(ref done, out buf, out invalid);
if (invalid)
{
lock (invalidUrl) if (!invalidUrl.Contains(url)) invalidUrl.Add(url);
}
if (IsAborted) return;
if (ok && torrent.Pieces.IsValid(sha1.ComputeHash(buf), piece))
{
var len = GetPieceLength(piece);
var pos = torrent.PieceLength*piece;
//Utils.StartAsync(() =>
//{
lock (file)
{
file.Seek(pos, SeekOrigin.Begin);
file.Write(buf, 0, len);
}
//});
pieceStates[piece] = PieceState.Done;
break;
}
else Trace.TraceWarning("Piece {0} failed for {1}", piece, url);
}
}
catch (Exception ex)
{
Trace.TraceError("Error while getting piece {0}:{1}", piece, ex);
}
if (pieceStates[piece] != PieceState.Done) pieceStates[piece] = PieceState.Failed;
}
lock (block) Monitor.Pulse(block);
}
