/// <summary>
/// 创建参数
/// </summary>
/// <param name="parmNode">待解析的节点</param>
/// <returns>返回创建的参数</returns>
private static DbParameter CreateParm(DictNode parmNode)
{
SqlParameter parm = new SqlParameter();
parm.ParameterName = ((BytesNode)parmNode["name"]).StringText;
parm.DbType = (DbType)((IntNode)parmNode["type"]).Value;
if (parmNode.ContainsKey("size"))
{
parm.Size = ((IntNode)parmNode["size"]).Value;
}
if (parmNode.ContainsKey("direction"))
{
ParameterDirection direction = (ParameterDirection)((IntNode)parmNode["direction"]).Value;
switch (direction)
{
case ParameterDirection.Input:
case ParameterDirection.InputOutput:
parm.Direction = direction;
parm.Value = GetObject(parm.DbType, (BytesNode)parmNode["value"]);
break;
case ParameterDirection.Output:
case ParameterDirection.ReturnValue:
parm.Direction = direction;
break;
}
}
else
{
parm.Value = GetObject(parm.DbType, (BytesNode)parmNode["value"]);
}
return(parm);
}
/// <summary>
/// 处理打开数据包
/// </summary>
/// <param name="packet">打开数据包</param>
/// <param name="ipAddress">IP地址</param>
/// <param name="error">错误信息</param>
/// <returns>返回是否成功打开连接</returns>
private bool HandleOpenPacket(byte[] packet, string ipAddress, out string error)
{
string deviceId = string.Empty;
DictNode openNode = (DictNode)BEncode.Decode(packet);
if (openNode.ContainsKey("deviceid"))
{
deviceId = ((BytesNode)openNode["deviceid"]).StringText;
}
else
{
error = "不包含机构号";
return(false);
}
if (openNode.ContainsKey("priority"))
{
int priority = (byte)((IntNode)openNode["priority"]).Value;
if (priority > 4 || priority < 0)
{
error = "优先级错误";
return(false);
}
}
else
{
error = "不包含优先级";
return(false);
}
bool result = Validate(deviceId, ipAddress, out error);
return(result);
}
private object DecodeScalar(byte[] content)
{
DictNode rootNode = (DictNode)BEncode.Decode(content);
IntNode codeNode = (IntNode)rootNode["code"];
switch (codeNode.Value)
{
case 1:
case 2:
throw new DbProxyException("数据集收到的数据包出错!");
case 3:
DictNode itemNode = (DictNode)rootNode["item"];
string typeName = ((BytesNode)itemNode["type"]).StringText;
string value = ((BytesNode)itemNode["value"]).StringText;
if (rootNode.ContainsKey("parmlist"))
{
HandleParmsNode((rootNode)["parmlist"]);
}
return(NodeEncoder.GetObject(typeName, value));
case 4:
BytesNode messageNode = (BytesNode)rootNode["message"];
throw new DbProxyException(messageNode.StringText);
case 5:
throw new DbProxyException("校验出错!");
default:
throw new DbProxyException(string.Format("无效消息代码:{0}!", codeNode.Value));
}
}
private int DecodeNonQuery(byte[] content)
{
DictNode rootNode = (DictNode)BEncode.Decode(content);
IntNode codeNode = (IntNode)rootNode["code"];
switch (codeNode.Value)
{
case 1:
IntNode lineNode = (IntNode)rootNode["linenum"];
if (rootNode.ContainsKey("parmlist"))
{
HandleParmsNode((rootNode)["parmlist"]);
}
return(lineNode.Value);
case 2:
case 3:
throw new DbProxyException("数据集收到的数据包出错!");
case 4:
BytesNode messageNode = (BytesNode)rootNode["message"];
throw new DbProxyException(messageNode.StringText);
case 5:
throw new DbProxyException("校验出错!");
default:
throw new DbProxyException(string.Format("无效消息代码:{0}!", codeNode.Value));
}
}
/// <summary>
/// 检验打开数据包
/// </summary>
/// <param name="packet">打开数据包</param>
/// <param name="key">密钥</param>
/// <param name="iv">初始化向量</param>
/// <param name="error">错误信息</param>
/// <returns>如果打开成功,返回ture,否则返回false</returns>
private bool CheckOpenPacket(byte[] packet, out byte[] key, out byte[] iv, out string error)
{
key = null;
iv = null;
port = -1;
error = string.Empty;
try
{
DictNode node = (DictNode)BEncode.Decode(packet);
if (node.ContainsKey("key") && node.ContainsKey("iv"))
{
key = ((BytesNode)node["key"]).ByteArray;
iv = ((BytesNode)node["iv"]).ByteArray;
return(true);
}
error = "数据包不包含密钥或者初始化向量或者端口信息!";
}
catch (BEncodingException bee)
{
error = bee.Message;
}
return(false);
}
/// <summary>
/// 创建存储过程的命令
/// </summary>
/// <param name="node">待解析的节点</param>
/// <returns>返回存储过程的命令</returns>
internal static DbCommand CreateProcCommand(DictNode node)
{
DbCommand result = new SqlCommand();
string cmdText = ((BytesNode)node["text"]).StringText;
result.CommandText = cmdText;
result.CommandType = CommandType.StoredProcedure;
if (node.ContainsKey("parms"))
{
ListNode parmsNode = ((ListNode)node["parms"]);
foreach (BEncodedNode parmNode in parmsNode)
{
DictNode dictNode = (DictNode)parmNode;
result.Parameters.Add(CreateParm(dictNode));
}
}
return(result);
}
private void DecodeReader(byte[] content, DataTable table)
{
DictNode rootNode = (DictNode)BEncode.Decode(content);
IntNode codeNode = (IntNode)rootNode["code"];
switch (codeNode.Value)
{
case 1:
case 3:
throw new DbProxyException("数据集收到的数据包出错!");
case 4:
BytesNode messageNode = (BytesNode)rootNode["message"];
throw new DbProxyException(messageNode.StringText);
case 5:
throw new DbProxyException("校验出错!");
}
//解码类型表
ListNode typelistNode = (ListNode)rootNode["typelist"];
table.BeginInit();
table.BeginLoadData();
foreach (BEncodedNode node in typelistNode)
{
BytesNode nameNode = (BytesNode)(((DictNode)node)["name"]);
BytesNode typeNode = (BytesNode)(((DictNode)node)["type"]);
DataColumn column = new DataColumn(nameNode.StringText);
column.DataType = types[typeNode.StringText];
table.Columns.Add(column);
}
//解码数据集
ListNode itemsNode = (ListNode)rootNode["items"];
for (int i = 0; i < itemsNode.Count; i++)
{
ListNode itemNode = (ListNode)itemsNode[i];
DataRow row = table.NewRow();
for (int j = 0; j < itemNode.Count; j++)
{
Type type = table.Columns[j].DataType;
string valueStr = ((BytesNode)itemNode[j]).StringText;
if (valueStr == null)
{
row[j] = DBNull.Value;
}
else if (type == typeof(string))
{
row[j] = valueStr;
}
else if (type == typeof(byte))
{
row[j] = byte.Parse(valueStr);
}
else if (type == typeof(sbyte))
{
row[j] = sbyte.Parse(valueStr);
}
else if (type == typeof(ushort))
{
row[j] = ushort.Parse(valueStr);
}
else if (type == typeof(short))
{
row[j] = short.Parse(valueStr);
}
else if (type == typeof(uint))
{
row[j] = uint.Parse(valueStr);
}
else if (type == typeof(int))
{
row[j] = int.Parse(valueStr);
}
else if (type == typeof(ulong))
{
row[j] = ulong.Parse(valueStr);
}
else if (type == typeof(long))
{
row[j] = long.Parse(valueStr);
}
else if (type == typeof(byte[]))
{
row[j] = ((BytesNode)itemNode[j]).ByteArray;
}
else if (type == typeof(DateTime))
{
row[j] = DateTime.Parse(valueStr);
}
else if (type == typeof(float))
{
row[j] = float.Parse(valueStr);
}
else if (type == typeof(double))
{
row[j] = double.Parse(valueStr);
}
else if (type == typeof(decimal))
{
row[j] = decimal.Parse(valueStr);
}
}
table.Rows.Add(row);
}
if (rootNode.ContainsKey("parmlist"))
{
HandleParmsNode((rootNode)["parmlist"]);
}
table.EndLoadData();
table.EndInit();
}
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);
}
/// <summary>
/// Parse the BEncoded message
/// </summary>
/// <param name="node">Tracker response BEncoded node</param>
/// <returns>return the AnnounceResponse class</returns>
private AnnounceResponse Parse(DictNode node)
{
AnnounceResponse result = new AnnounceResponse();
Debug.Assert(node != null);
//Get failure reason
if (node.ContainsKey("failure reason"))
{
BytesNode failureReasonNode = node["failure reason"] as BytesNode;
Debug.Assert(failureReasonNode != null);
result.FailureReason = failureReasonNode.StringText;
}
else
{
result.FailureReason = string.Empty;
}
//Get warning message
if (node.ContainsKey("warning message"))
{
BytesNode warningMessageNode = node["warning message"] as BytesNode;
Debug.Assert(warningMessageNode != null);
result.WarningMessage = warningMessageNode.StringText;
}
else
{
result.WarningMessage = string.Empty;
}
//Get interval
if (node.ContainsKey("interval"))
{
IntNode intervalNode = node["interval"] as IntNode;
Debug.Assert(intervalNode != null);
result.Interval = intervalNode.IntValue;
}
else
{
result.Interval = Setting.MaxInterval;
}
//Get min interval
if (node.ContainsKey("min interval"))
{
IntNode minIntervalNode = node["min interval"] as IntNode;
Debug.Assert(minIntervalNode != null);
result.MinInterval = minIntervalNode.IntValue;
}
else
{
result.MinInterval = result.Interval;
}
//Get tracker id
if (node.ContainsKey("tracker id"))
{
BytesNode trackerIdNode = node["tracker id"] as BytesNode;
Debug.Assert(trackerIdNode != null);
result.TrackerId = trackerIdNode.StringText;
}
else
{
result.TrackerId = string.Empty;
}
//Get complete
if (node.ContainsKey("complete"))
{
IntNode completeNode = node["complete"] as IntNode;
Debug.Assert(completeNode != null);
result.Complete = completeNode.IntValue;
}
else
{
result.Complete = 0;
}
//Get incomplete
if (node.ContainsKey("incomplete"))
{
IntNode incompleteNode = node["incomplete"] as IntNode;
Debug.Assert(incompleteNode != null);
result.Incomplete = incompleteNode.IntValue;
}
else
{
result.Incomplete = 0;
}
//Get peers
result.Peers = GetPeers(node);
return(result);
}