public static Torrent LoadFromFile(string filePath, string downloadPath)
{
object obj = BenCoding.DecodeFile(filePath);
string name = Path.GetFileNameWithoutExtension(filePath);
return(BEncodingObjectToTorrent(obj, name, downloadPath));
}
public static object DecodeFile(string path)
{
if (!File.Exists(path))
{
throw new FileNotFoundException("unable to find file: " + path);
}
byte[] bytes = File.ReadAllBytes(path);
return(BenCoding.Decode(bytes));
}
private void HandleResponse(IAsyncResult result)
{
byte[] data;
using (HttpWebResponse response = (HttpWebResponse)_httpWebRequest.EndGetResponse(result))
{
if (response.StatusCode != HttpStatusCode.OK)
{
Console.WriteLine("error reaching tracker " + this + ": " + response.StatusCode + " " + response.StatusDescription);
return;
}
using (Stream stream = response.GetResponseStream())
{
data = new byte[response.ContentLength];
stream?.Read(data, 0, Convert.ToInt32(response.ContentLength));
}
}
Dictionary <string, object> info = BenCoding.Decode(data) as Dictionary <string, object>;
if (info == null)
{
Console.WriteLine("unable to decode tracker announce response");
return;
}
PeerRequestInterval = TimeSpan.FromSeconds((long)info["interval"]);
byte[] peerInfo = (byte[])info["peers"];
List <IPEndPoint> peers = new List <IPEndPoint>();
for (int i = 0; i < peerInfo.Length / 6; i++)
{
int offset = i * 6;
string address = peerInfo[offset] + "." + peerInfo[offset + 1] + "." + peerInfo[offset + 2] + "." + peerInfo[offset + 3];
int port = EndianBitConverter.Big.ToChar(peerInfo, offset + 4);
peers.Add(new IPEndPoint(IPAddress.Parse(address), port));
}
var handler = PeerListUpdated;
handler?.Invoke(this, peers);
}
public static void SaveToFile(Torrent torrent)
{
object obj = TorrentToBEncodingObject(torrent);
BenCoding.EncodeToFile(obj, torrent.Name + ".torrent");
}
private Torrent(string name, string location, List <FileItem> files, List <string> trackers, int pieceSize, byte[] pieceHashes = null, int blockSize = 16384, bool?isPrivate = false)
{
Name = name;
DownloadDirectory = location;
Files = files;
fileWriteLocks = new object[Files.Count];
for (int i = 0; i < this.Files.Count; i++)
{
fileWriteLocks[i] = new object();
}
if (trackers != null)
{
foreach (string url in trackers)
{
Tracker tracker = new Tracker(url);
Trackers.Add(tracker);
tracker.PeerListUpdated += HandlePeerListUpdated;
}
}
PieceSize = pieceSize;
BlockSize = blockSize;
IsPrivate = isPrivate;
int count = Convert.ToInt32(Math.Ceiling(TotalSize / Convert.ToDouble(PieceSize)));
PieceHashes = new byte[count][];
IsPieceVerified = new bool[count];
IsBlockAcquired = new bool[count][];
for (int i = 0; i < PieceCount; i++)
{
IsBlockAcquired[i] = new bool[GetBlockCount(i)];
}
if (pieceHashes == null)
{
// this is a new torrent so we have to create the hashes from the files
for (int i = 0; i < PieceCount; i++)
{
PieceHashes[i] = GetHash(i);
}
}
else
{
for (int i = 0; i < PieceCount; i++)
{
PieceHashes[i] = new byte[20];
Buffer.BlockCopy(pieceHashes, i * 20, PieceHashes[i], 0, 20);
}
}
object info = TorrentInfoToBEncodingObject(this);
byte[] bytes = BenCoding.Encode(info);
Infohash = SHA1.Create().ComputeHash(bytes);
for (int i = 0; i < PieceCount; i++)
{
Verify(i);
}
}
