public void Download(TrackerResponse trackerResponse)
{
trackerResponse.Peers = trackerResponse.Peers.Except(Peers.ToArray().Where(m => m != null).Select(m => m.ip)).ToArray();
_ = Task.Factory.StartNew(() =>
{
new Tcp().Download(this, trackerResponse);
}, TaskCreationOptions.LongRunning);
}
public void Download(TorrentModel torrentModel, TrackerResponse trackerResponse)
{
var localIp = IPAddress.Parse("127.0.0.1");
Track = trackerResponse.IPEndPoint;
var data = trackerResponse.Peers.Where(m => !m.Address.Equals(localIp)).Distinct(new IPEndPointCompare()).OrderBy(m => Guid.NewGuid()).ToList();
////测试，调试
//var data = new List<IPEndPoint> {
// new IPEndPoint(IPAddress.Parse("192.168.1.102"), 29512),
// //new IPEndPoint(IPAddress.Parse("192.168.1.102"), 18123)
//};
if (data.Count == 0)
{
_logger.LogInformation("没有满足条件的track");
return;
}
Total = data.Count;
int maxRun = Math.Min(10, Total);
SemaphoreSlim = new SemaphoreSlim(maxRun, maxRun);
_logger.LogWarnning($"track：{Track}，ip总数：" + data.Count);
var lockObj = new object();
torrentModel.AddStart();
foreach (var item in data)
{
if (torrentModel.IsFinish)
{
return;
}
//_logger.LogInformation($"{item}，占用信号量");
SemaphoreSlim.Wait();
var peer = new Peer(lockObj, this);
peer.Process(item, torrentModel.Info, torrentModel);
torrentModel.Peers.Add(peer);
if (peer.IsConnect)
{
break;
}
}
for (int i = 0; i < maxRun; i++)
{
SemaphoreSlim.Wait();
}
torrentModel.AddFinish();
_logger.LogWarnning($"{Track}：全部尝试完毕");
_ = torrentModel.TrackAsync();
torrentModel.Connecting();
}
public TrackerResponse Announce()
{
foreach (AnnounceTier announceTier in AnnounceTiers)
{
TrackerResponse response = announceTier.Announce();
if (response.Success)
{
return(response);
}
}
return(new TrackerResponse("Torrent Error: No trackers responded"));
}
static void Main(string[] args)
{
TorrentClient client = new TorrentClient
{
PeerId = "-CS1000-000000000000"
};
client.Start(6881);
Torrent torrent = client.LoadTorrentFile("ubuntu-17.04-desktop-amd64.iso.torrent");
TrackerResponse response = torrent.Announce();
Console.WriteLine($"Success: {response.Success}");
Console.Read();
}
static void Main(string[] args)
{
Console.WriteLine("TorrentSharp Example");
TorrentClient client = new TorrentClient();
Console.WriteLine($"PeerId: {client.PeerId}");
client.Start(6881);
Torrent torrent = client.LoadTorrentFile("ubuntu-17.04-desktop-amd64.iso.torrent");
TrackerResponse response = torrent.Announce();
Console.WriteLine($"Success: {response.Success}");
Peer peer = new Peer(client, torrent, response.Peers[0]);
Console.Read();
}
private void HandleTrack(byte[] buf, int receiveLen, EndPoint remoteEP)
{
using (var ms = new MemoryStream(buf, 0, receiveLen))
using (var br = new BinaryReader(ms))
{
var action = (ActionsType)IPAddress.NetworkToHostOrder(br.ReadInt32());
if (action == ActionsType.Connect)
{
var transaction_id = IPAddress.NetworkToHostOrder(br.ReadInt32());
var connection_id = IPAddress.NetworkToHostOrder(br.ReadInt64());
_logger.LogInformation($"收到字节长度：{receiveLen}，i32:{transaction_id},i64:{connection_id}");
var ids = ConnecttionId_TransactionId.Create(transaction_id, connection_id);
if (_dic.ContainsKey(ids))
{
var model = _dic[ids];
//_logger.LogInformation(model.Info.Name ?? model.Info.Files.FirstOrDefault()?.Path.FirstOrDefault());
Announcing(model, connection_id, transaction_id, remoteEP);
//Scraping(model, connection_id, transaction_id, remoteEP);
}
var rk = new ReplayItem()
{
EndPoint = remoteEP, Ids = ids
};
if (_connectingLs.ContainsKey(rk))
{
//_logger.LogInformation("已获取udp返回的值，从循环数据源删除相关数据");
_connectingLs.Remove(rk);
}
_connectingLs.Remove(new ReplayItem {
Ids = ids, EndPoint = remoteEP
});
}
else if (action == ActionsType.Announce)
{
var transaction_id = IPAddress.NetworkToHostOrder(br.ReadInt32());
var interval = IPAddress.NetworkToHostOrder(br.ReadInt32());
var leechers = IPAddress.NetworkToHostOrder(br.ReadInt32());
var seeders = IPAddress.NetworkToHostOrder(br.ReadInt32());
var ls = new List <IPEndPoint>();
while (ms.Position != ms.Length)
{
var ip = br.ReadBytes(4);
var port = br.ReadUInt16();
var ipendpoint = new IPEndPoint(new IPAddress(ip), port);
ls.Add(ipendpoint);
}
_logger.LogInformation("收到响应 transaction_id:" + transaction_id + ",ip-" + ls.Aggregate("", (s, i) => s + i + ";"));
var ids = ConnecttionId_TransactionId.Create(transaction_id);
if (_dic.ContainsKey(ids))
{
var model = _dic[ids];
var tr = new TrackerResponse(remoteEP as IPEndPoint)
{
Peers = ls.ToArray(),
Interval = interval,
Complete = seeders,
Incomplete = leechers
};
model.Download(tr);
IsOk = true;
_dic.Remove(ids);
if (!model.IsFinish)
{
_ = Task.Delay(TimeSpan.FromSeconds(tr.Interval))
.ContinueWith(t =>
{
_socket.SendTo(ids.ToArray(), remoteEP);
_dic.Add(ids, model);
_connectingLs.Add(new ReplayItem {
Ids = ids, EndPoint = remoteEP
}, 0);
});
}
}
}
else if (action == ActionsType.Scrape)
{
var transaction_id = IPAddress.NetworkToHostOrder(br.ReadInt32());
var ids = ConnecttionId_TransactionId.Create(transaction_id);
var complete = IPAddress.NetworkToHostOrder(br.ReadInt32());
var downloaded = IPAddress.NetworkToHostOrder(br.ReadInt32());
var incomplete = IPAddress.NetworkToHostOrder(br.ReadInt32());
// todo do something for Scrape
}
else if (action == ActionsType.Error)
{
br.ReadInt32();
var i1 = br.BaseStream.Length;
var i2 = br.BaseStream.Position;
bool ishavestr = i1 != i2;
if (ishavestr)
{
var strbuf = br.ReadBytes((int)(i1 - i2));
var errMsg = Encoding.UTF8.GetString(strbuf);
_logger.LogWarnning($"{remoteEP}：udp errmsg:" + errMsg);
}
}
else
{
_logger.LogInformation("收到某些响应。。。");
}
}
}
public TrackerResponse MakeWebRequest(Uri uriQuest, string httpProtocol, string headers)
{
Encoding encoder = Encoding.GetEncoding(0x4e4);
Socket = new SocketEx(Proxy, ProxyServer, ProxyPort, ProxyUser, ProxyPassword);
Socket.SetTimeout(0x30d40);
Socket.PreAuthenticate = false;
log.Info($"Connecting to {uriQuest.Host}:{uriQuest.Port}");
for (int i = 0; i < 5; i++)
{
try
{
Socket.Connect(uriQuest.Host, uriQuest.Port);
log.Info("Connected Successfully");
break;
}
catch (Exception ex)
{
log.Warn(ex);
log.Warn("Failed connection attempt: " + i);
}
}
if (!Socket.Connected)
{
log.Error("Unable to connect. Quitting...");
return(null);
}
log.Info("======== Sending Command to Tracker ========");
string cmd = "GET " + uriQuest.PathAndQuery + " " + httpProtocol + "\r\n" + headers.Replace("{host}", uriQuest.Host) + "\r\n";
Socket.Send(encoder.GetBytes(cmd));
try
{
byte[] data = new byte[32 * 1024];
using (MemoryStream memStream = new MemoryStream())
{
int dataLen = Socket.Receive(data);
while (dataLen > 0)
{
memStream.Write(data, 0, dataLen);
dataLen = Socket.Receive(data);
}
if (memStream.Length == 0)
{
log.Info("Error : Tracker Response is empty");
return(null);
}
TrackerResponse trackerResponse = new TrackerResponse(memStream);
memStream.Close();
Socket.Close();
if (trackerResponse.doRedirect)
{
return(MakeWebRequest(new Uri(trackerResponse.RedirectionURL), httpProtocol, headers));
}
log.Info("======== Tracker Response ========");
log.Info(trackerResponse.Headers.ToString());
if (trackerResponse.Dico == null)
{
log.Warn("*** Failed to decode tracker response :");
log.Warn(trackerResponse.Body);
}
return(trackerResponse);
}
}
catch (Exception ex)
{
Socket.Close();
log.Error(ex);
return(null);
}
}
public static async Task TrackAsync(this TorrentModel model)
{
var info_hash = Encoding.UTF8.GetString(WebUtility.UrlEncodeToBytes(model.Info.Sha1Hash, 0, 20));
var peer_id = Encoding.UTF8.GetString(WebUtility.UrlEncodeToBytes(PeerIdBytes, 0, 20));
var port = Port;
var uploaded = 0;
var downloaded = 0;
var left = model.Info.Length;
var eventStr = Event.Started.ToString().ToLower();
var compact = 1;
var us = model.Announce_list.SelectMany(m => m).ToList();
if (!string.IsNullOrEmpty(model.Announce.Url))
{
us.Add(model.Announce);
}
var httpUrls = us.Where(m => m.Url.StartsWith("http")).ToList();
if (!httpUrls.Any())
{
throw new Exception("不存在http或者https的announce");
}
_logger.LogInformation("http track数量：" + httpUrls.Count);
//udp tracker:https://blog.csdn.net/wenxinfly/article/details/1504785
foreach (var b in httpUrls)
{
await ProcessRequest();
async Task ProcessRequest()
{
try
{
string url = $"{b.Url}?info_hash={info_hash}&peer_id={peer_id}&port={port}&uploased={uploaded}&downloaded={downloaded}&left={left}&event={eventStr}&compact={compact}";
if (b.Url.Contains('?'))
{
url = $"{b.Url}&info_hash={info_hash}&peer_id={peer_id}&port={port}&uploased={uploaded}&downloaded={downloaded}&left={left}&event={eventStr}&compact={compact}";
}
var responseBuf = await _httpClient.GetByteArrayAsync(url);
var res = Parser.DecodingDictionary(new MemoryStream(responseBuf));
if (res.Value.Count == 1)
{
return;
}
var m = new TrackerResponse(res, b.Url);
if (m.Complete == 0)
{
return;
}
_logger.LogInformation("请求" + b.Url + "成功：" + m.Peers.Length);
model.Download(m);
if (model.IsFinish)
{
return;
}
else
{
_ = Task.Delay(TimeSpan.FromSeconds(m.Interval))
.ContinueWith(t =>
{
_ = ProcessRequest();
});
}
}
catch (Exception e)
{
_logger.LogInformation("请求" + b.Url + "发生错误：" + e.Message);
}
}
}
}
