/// <summary>
/// 构造函数
/// </summary>
/// <param name="downloader">下载器</param>
/// <param name="choker">阻塞器</param>
/// <param name="piecesNumber">下载文件的片断数量</param>
/// <param name="isEverythingPending"></param>
/// <param name="totalUp">参数类</param>
/// <param name="maxUploadRate">最大上传速率</param>
/// <param name="scheduleFunction"></param>
public Connecter(Downloader downloader, IChoker choker, int piecesNumber, PendingDelegate isEverythingPending,
Measure totalUp, int maxUploadRate, SchedulerDelegate scheduleFunction)
{
this.downloader = downloader;
this.choker = choker;
this.piecesNumber = piecesNumber;
this.isEverythingPending = isEverythingPending;
this.maxUploadRate = maxUploadRate;
this.scheduleFunction = scheduleFunction;
this.totalUp = totalUp;
this.rateCapped = false;
this.connectionDictionary = new Dictionary <IEncryptedConnection, IConnection>();
this.endgame = false;
this.CheckEndgame();
}
public DownloaderFeedback(IChoker choker, SchedulerDelegate addTaskFunction, StatusDelegate statusFunction, MeasureRateDelegate uploadFunction,
MeasureRateDelegate downloadFunction, MeasureRateDelegate remainingFunction, AmountDelegate leftFunction, long fileLength, Flag finishFlag,
double interval, bool sp)
{
this.choker = choker;
this.addTaskFunction = addTaskFunction;
this.statusFunction = statusFunction;
this.uploadFunction = uploadFunction;
this.downloadFunction = downloadFunction;
this.remainingFunction = remainingFunction;
this.leftFunction = leftFunction;
this.fileLength = fileLength;
this.finishFlag = finishFlag;
this.interval = interval;
this.sp = sp;
this.lastIDs = new List <byte[]>();
this.Display();
}
/// <summary>
/// 构造函数
/// </summary>
/// <param name="connection">连接类</param>
/// <param name="choker">阻塞类</param>
/// <param name="storageWrapper">磁盘封装类</param>
/// <param name="maxSliceLength">最大子片断长度</param>
/// <param name="maxRatePeriod">最大速率更新时间</param>
/// <param name="fudge"></param>
public Upload(IConnection connection, IChoker choker, IStorageWrapper storageWrapper, int maxSliceLength,
double maxRatePeriod, double fudge)
{
this.connection = connection;
this.choker = choker;
this.storageWrapper = storageWrapper;
this.maxSliceLength = maxSliceLength;
this.maxRatePeriod = maxRatePeriod;
this.choked = true;
this.interested = false;
this.buffer = new LinkedList <ActiveRequest>();
this.measure = new Measure(maxRatePeriod, fudge);
//如果已经获取的某些片断，则向所有节点发送BitField信息
if (storageWrapper.DoIHaveAnything())
{
connection.SendBitfield(storageWrapper.GetHaveList());
}
}
/// <summary>
/// 构造函数
/// </summary>
/// <param name="downloader">下载器</param>
/// <param name="choker">阻塞器</param>
/// <param name="piecesNumber">下载文件的片断数量</param>
/// <param name="isEverythingPending"></param>
/// <param name="totalUp">参数类</param>
/// <param name="maxUploadRate">最大上传速率</param>
/// <param name="scheduleFunction"></param>
public DummyConnecter(Downloader downloader, IChoker choker, int piecesNumber, PendingDelegate isEverythingPending,
Measure totalUp, int maxUploadRate, SchedulerDelegate scheduleFunction)
: base(downloader, choker, piecesNumber, isEverythingPending, totalUp, maxUploadRate, scheduleFunction)
{
}
public static void StartDownload(Parameters parameters, Flag doneFlag, StatusDelegate statusFunction, ErrorDelegate errorFunction, FinishedDelegate finishedFunction)
{
if (parameters.ResponseFile.Length == 0 && parameters.Url.Length == 0)
{
throw new BitTorrentException("需要Response file 或者 Url");
}
Parameters = parameters;
Stream stream = null;
byte[] response;
long length = 0;
try
{
if (parameters.ResponseFile.Length != 0)
{
stream = File.OpenRead(parameters.ResponseFile);
length = stream.Length;
}
else
{
WebRequest webRequest = WebRequest.Create(parameters.Url);
WebResponse webResponse = webRequest.GetResponse();
stream = webResponse.GetResponseStream();
length = webResponse.ContentLength;
}
response = new byte[length];
stream.Read(response, 0, (int)length);
}
catch
{
throw new BitTorrentException("Problem getting response info");
}
finally
{
if (stream != null)
{
stream.Close();
}
}
DictNode rootNode;
try
{
rootNode = BEncodingFactory.Decode(response) as DictNode;
//BTFormat.CheckMessage(rootNode);
}
catch
{
throw new BitTorrentException("got bad file");
}
DictNode infoNode = rootNode["info"] as DictNode;
List <BitFile> files = new List <BitFile>();
string file;
long fileLength;
try
{
if (infoNode.ContainsKey("length"))
{
fileLength = (infoNode["length"] as IntNode).Value;
BytesNode nameNode = (infoNode["name"] as BytesNode);
if (nameNode == null)
{
return;
}
file = @"k:\torrent\" + nameNode.StringText;
Make(file, false);
files.Add(new BitFile(file, fileLength));
}
else
{
fileLength = 0L;
ListNode filesNode = infoNode["files"] as ListNode;
foreach (BEncodedNode handler in filesNode)
{
DictNode fileNode = infoNode["files"] as DictNode;
fileLength += (fileNode["length"] as IntNode).Value;
}
//访问文件夹
BytesNode nameNode = infoNode["name"] as BytesNode;
if (nameNode == null)
{
return;
}
file = @"C:\torrent\" + nameNode.StringText;
// if this path exists, and no files from the info dict exist, we assume it's a new download and
// the user wants to create a new directory with the default name
bool existed = false;
if (Directory.Exists(file))
{
foreach (BEncodedNode handler in filesNode)
{
DictNode fileNode = handler as DictNode;
ListNode pathNode = fileNode["path"] as ListNode;
if (File.Exists(Path.Combine(file, (pathNode[0] as BytesNode).StringText)))
{
existed = true;
break;
}
}
if (!existed)
{
file = Path.Combine(file, (infoNode["name"] as BytesNode).StringText);
}
}
Make(file, true);
// alert the UI to any possible change in path
//TODO: if (pathFunc != null)
// pathFunc(file)
foreach (BEncodedNode handler in filesNode)
{
DictNode fileNode = handler as DictNode;
ListNode pathNode = fileNode["path"] as ListNode;
string n = file;
foreach (BEncodedNode stringHandler in pathNode)
{
n = Path.Combine(n, (stringHandler as BytesNode).StringText);
}
files.Add(new BitFile(n, (fileNode["length"] as IntNode).Value));
Make(n, false);
}
}
}
catch
{
throw new BitTorrentException("Couldn't allocate directory...");
}
Flag finishFlag = new Flag();
FinishedHelper finishedHelper = new FinishedHelper();
finishedHelper.ErrorFunction = errorFunction;
finishedHelper.FinishedFunction = finishedFunction;
finishedHelper.DoneFlag = finishFlag;
string sID = DateTime.Now.ToLongDateString() + "www.wallywood.co.uk";
byte[] myID = Globals.GetSha1Hash(Encoding.ASCII.GetBytes(sID));//Globals.Sha1.ComputeHash(Encoding.Default.GetBytes(sID));
byte[] piece = (infoNode["pieces"] as BytesNode).ByteArray;
List <byte[]> pieces = new List <byte[]>();
for (int i = 0; i < piece.Length; i += 20)
{
byte[] temp = new byte[20];
Buffer.BlockCopy(piece, i, temp, 0, 20);
pieces.Add(temp);
}
Storage _storage = null;
try
{
try
{
//_storage = new Storage(files, parameters.AllocatePause, statusFunction);
finishedHelper.Storage = _storage;
}
catch (Exception ex)
{
errorFunction("trouble accessing files - " + ex.Message);
}
IntNode pieceLengthNode = infoNode["piece length"] as IntNode;
StorageWrapper = new StorageWrapper(_storage, parameters.DownloadSliceSize, pieces, (int)pieceLengthNode.Value,
finishedHelper.Finished, finishedHelper.Failed, statusFunction, finishFlag, parameters.CheckHashes,
finishedHelper.DataFlunked);
}
// Catch ValueError
// failed("bad data")
// catch IO Error
catch (Exception ex)
{
finishedHelper.Failed("Problem - " + ex.Message);
}
if (finishFlag.IsSet)
{
return;
}
RawServer rawServer = new RawServer(finishFlag, parameters.TimeoutCheckInterval, parameters.Timeout, false);
if (parameters.MaxPort < parameters.MinPort)
{
int temp = parameters.MinPort;
parameters.MinPort = parameters.MaxPort;
parameters.MaxPort = parameters.MinPort;
}
ushort listenPort;
for (listenPort = parameters.MinPort; listenPort <= parameters.MaxPort; listenPort++)
{
try
{
rawServer.Bind(listenPort, parameters.Bind, false);
break;
}
catch (SocketException)
{
//TODO: Error Code
}
}
//TODO: Check whether nothing bound
Choker = new Choker(parameters.MaxUploads, rawServer.AddTask, finishFlag);
Measure uploadMeasure = new Measure(parameters.MaxRatePeriod, parameters.UploadRateFudge);
Measure downloadMeasure = new Measure(parameters.MaxRatePeriod);
RateMeasure rateMeasure = new RateMeasure(StorageWrapper.LeftLength);
Downloader downloader =
new NormalDownloader(StorageWrapper, new PiecePicker(pieces.Count), parameters.RequestBackLog,
parameters.MaxRatePeriod, pieces.Count, downloadMeasure, parameters.SnubTime,
rateMeasure.DataCameIn);
Connecter connecter =
new Connecter(downloader, Choker, pieces.Count, StorageWrapper.IsEverythingPending, uploadMeasure,
parameters.MaxUploadRate << 10, rawServer.AddTask);
byte[] infoHash = Globals.GetSha1Hash(BEncodingFactory.ByteArrayEncode(infoNode));//Globals.Sha1.ComputeHash(BEncodingFactory.ByteArrayEncode(infoNode));
Encrypter encrypter = new Encrypter(connecter, rawServer, myID, parameters.MaxMessageLength, rawServer.AddTask,
parameters.KeepAliveInterval, infoHash, parameters.MaxInitiate);
//ReRequester reRequester =
// new ReRequester((rootNode["announce"] as BytesNode).StringText, parameters.RerequestInterval,
// rawServer.AddTask, connecter.GetConnectionsCount, parameters.MinPeers,
// encrypter.StartConnect, rawServer.AddExternalTask,
// StorageWrapper.GetLeftLength, uploadMeasure.GetTotalLength, downloadMeasure.GetTotalLength,
// listenPort, parameters.IP,
// myID, infoHash, parameters.HttpTimeout, null, parameters.MaxInitiate, finishFlag);
DownloaderFeedback downloaderFeedback =
new DownloaderFeedback(Choker, rawServer.AddTask, statusFunction, uploadMeasure.GetUpdatedRate,
downloadMeasure.GetUpdatedRate, rateMeasure.GetTimeLeft, rateMeasure.GetLeftTime,
fileLength, finishFlag, parameters.DisplayInterval,
parameters.Spew);
statusFunction("connection to peers", -1, -1, -1, -1);
//TODO: finishedHelper.errorfunc
finishedHelper.FinishFlag = finishFlag;
//finishedHelper.ReRequester = reRequester;
finishedHelper.RateMeasure = rateMeasure;
//reRequester.d(0);
rawServer.ListenForever(encrypter);
//reRequester.Announce(2, null);
}