迅雷种子文件——解析Torrent文件[宝典]

对于这个类在解析Torrent 文件时候可能有错误，请大家指正。

先把文件解析的类贴出来，连接有空再发把。

使用
TorrentFile File = new TorrentFile(openFileDialog1.FileName);
File.TorrentFileInfoClass[] 文件信息
File.TorrentAnnounceList 服务器列表
全部代码
using System;
using System.Collections.Generic;
using System.Text;
using System.Windows.Forms;
using System.Collections;
namespace Zgke.OtherFile
{
/// <summary>
/// Torrent文件
/// *************
/// 2008-08-28
/// </summary>
public class TorrentFile
{
#region 私有字段
private string _OpenError = "";
private bool _OpenFile = false;
private string _TorrentAnnounce = "";
private IList<string> _TorrentAnnounceList = new List<string>();
private DateTime _TorrentCreateTime = new DateTime(1970,1,1,0,0,0);
private long _TorrentCodePage = 0;
private string _TorrentComment = "";
private string _TorrentCreatedBy = "";
private string _TorrentEncoding = "";
private string _TorrentCommentUTF8 = "";
private IList<TorrentFileInfoClass> _TorrentFileInfo = new List<TorrentFileInfoClass>();
private string _TorrentName = "";
private string _TorrentNameUTF8 = "";
private long _TorrentPieceLength = 0;
private byte[] _TorrentPieces;
private string _TorrentPublisher = "";
private string _TorrentPublisherUTF8 = "";
private string _TorrentPublisherUrl = "";
private string _TorrentPublisherUrlUTF8 = "";
private IList<string> _TorrentNotes = new List<string>();
#endregion
#region 属性
/// <summary>
/// 错误信息
/// </summary>
public string OpenError { set { _OpenError = value; } get { return _OpenError; } }
/// <summary>
/// 是否正常打开文件
/// </summary>
public bool OpenFile { set { _OpenFile = value; } get { return _OpenFile; } }
/// <summary>
/// 服务器的URL(字符串)
/// </summary>
public string TorrentAnnounce { set { _TorrentAnnounce = value; } get { return _TorrentAnnounce; } }
/// <summary>
/// 备用tracker服务器列表(列表)
/// </summary>
public IList<string> TorrentAnnounceList { set { _TorrentAnnounceList = value; } get { return _TorrentAnnounceList; } }
/// <summary>
/// 种子创建的时间，Unix标准时间格式，从1970 1月1日00:00:00到创建时间的秒数(整数)
/// </summary>
public DateTime TorrentCreateTime { set { _TorrentCreateTime = value; } get { return _TorrentCreateTime; } }
/// <summary>
/// 未知数字CodePage
/// </summary>
public long TorrentCodePage { set { _TorrentCodePage = value; } get { return _TorrentCodePage; } }
/// <summary>
/// 种子描述
/// </summary>
public string TorrentComment { set { _TorrentComment = value; } get { return
_TorrentComment; } }
/// <summary>
/// 编码方式
/// </summary>
public string TorrentCommentUTF8 { set { _TorrentCommentUTF8 = value; } get { return _TorrentCommentUTF8; } }
/// <summary>
/// 创建人
/// </summary>
public string TorrentCreatedBy { set { _TorrentCreatedBy = value; } get { return _TorrentCreatedBy; } }
/// <summary>
/// 编码方式
/// </summary>
public string TorrentEncoding { set { _TorrentEncoding = value; } get { return _TorrentEncoding; } }
/// <summary>
/// 文件信息
/// </summary>
public IList<TorrentFileInfoClass> TorrentFileInfo { set { _TorrentFileInfo = value; } get { return _TorrentFileInfo; } }
/// <summary>
/// 种子名
/// </summary>
public string TorrentName { set { _TorrentName = value; } get { return _TorrentName; } }
/// <summary>
/// 种子名UTF8
/// </summary>
public string TorrentNameUTF8 { set { _TorrentNameUTF8 = value; } get { return _TorrentNameUTF8; } }
/// <summary>
/// 每个块的大小，单位字节(整数)
/// </summary>
public long TorrentPieceLength { set { _TorrentPieceLength = value; } get { return _TorrentPieceLength; } }
/// <summary>
/// 每个块的20个字节的SHA1 Hash的值(二进制格式)
/// </summary>
private byte[] TorrentPieces { set { _TorrentPieces = value; } get { return _TorrentPieces; } }
/// <summary>
/// 出版
/// </summary>
public string TorrentPublisher { set { _TorrentPublisher = value; } get { return _TorrentPublisher; } }
/// <summary>
/// 出版UTF8
/// </summary>
public string TorrentPublisherUTF8 { set { _TorrentPublisherUTF8 = value; } get { return _TorrentPublisherUTF8; } }
/// <summary>
/// 出版地址
/// </summary>
public string TorrentPublisherUrl { set { _TorrentPublisherUrl = value; } get { return _TorrentPublisherUrl; } }
/// <summary>
/// 出版地址
/// </summary>
public string TorrentPublisherUrlUTF8 { set { _TorrentPublisherUrlUTF8 = value; } get { return _TorrentPublisherUrlUTF8; } }
/// <summary>
/// NODES
/// </summary>
public IList<string> TorrentNotes { set { _TorrentNotes = value; } get { return _TorrentNotes; } }
#endregion
public TorrentFile(string FileName)
{
System.IO.FileStream TorrentFile = new System.IO.FileStream(FileName, System.IO.FileMode.Open);
byte[] TorrentBytes = new byte[TorrentFile.Length];
TorrentFile.Read(TorrentBytes, 0, TorrentBytes.Length);
TorrentFile.Close();
if ((char)TorrentBytes[0] != 'd')
{
if (OpenError.Length == 0) OpenError = "错误的Torrent文件，开头第1字节不是100";
return;
}
GetTorrentData(TorrentBytes);
}
#region 开始读数据
/// <summary>
/// 开始读取
/// </summary>
/// <param name="TorrentBytes"></param>
private void GetTorrentData(byte[] TorrentBytes)
{
int StarIndex = 1;
while (true)
{
object Keys = GetKeyText(TorrentBytes, ref StarIndex);
if (Keys == null)
{
if (StarIndex >= TorrentBytes.Length) OpenFile = true;
break;
}
if (GetV alueText(TorrentBytes, ref StarIndex, Keys.ToString().ToUpper()) == false) break;
}
}
#endregion
/// <summary>
/// 读取结构
/// </summary>
/// <param name="TorrentBytes"></param>
/// <param name="StarIndex"></param>
/// <param name="Keys"></param>
/// <returns></returns>
private bool GetV alueText(byte[] TorrentBytes,ref int StarIndex, string Keys)
{
switch (Keys)
{
case "ANNOUNCE":
TorrentAnnounce = GetKeyText(TorrentBytes, ref StarIndex).ToString();
break;
case "ANNOUNCE-LIST":
int ListCount = 0;
ArrayList _TempList=GetKeyData(TorrentBytes, ref StarIndex, ref ListCount);
for (int i = 0; i != _TempList.Count; i++)
{
TorrentAnnounceList.Add(_TempList[i].ToString());
}
break;
case "CREA TION DA TE":
object Date = GetKeyNumb(TorrentBytes, ref StarIndex).ToString();
if (Date == null)
{
if (OpenError.Length == 0) OpenError = "CREA TION DA TE 返回不是数字类型";
return false;
}
TorrentCreateTime = TorrentCreateTime.AddTicks(long.Parse(Date.ToString()));
break;
case "CODEPAGE":
object CodePageNumb = GetKeyNumb(TorrentBytes, ref StarIndex);
if (CodePageNumb == null)
{
if (OpenError.Length == 0) OpenError = "CODEPAGE 返回不是数字类型";
return false;
}
TorrentCodePage = long.Parse(CodePageNumb.ToString());
break;
case "ENCODING":
TorrentEncoding = GetKeyText(TorrentBytes, ref StarIndex).ToString();
break;
case "CREA TED BY":
TorrentCreatedBy = GetKeyText(TorrentBytes, ref StarIndex).ToString();
break;
case "COMMENT":
TorrentComment = GetKeyText(TorrentBytes, ref StarIndex).ToString();
break;
case "COMMENT.UTF-8":
TorrentCommentUTF8 = GetKeyText(TorrentBytes, ref StarIndex).ToString();
break;
case "INFO":
int FileListCount = 0;
GetFileInfo(TorrentBytes, ref StarIndex, ref FileListCount);
break;
case "NAME":
TorrentName = GetKeyText(TorrentBytes, ref StarIndex).ToString();
break;
case "NAME.UTF-8":
TorrentNameUTF8 = GetKeyText(TorrentBytes, ref StarIndex).ToString();
break;
case "PIECE LENGTH":
object PieceLengthNumb = GetKeyNumb(TorrentBytes, ref StarIndex);
if (PieceLengthNumb == null)
{
if (OpenError.Length == 0) OpenError = "PIECE LENGTH 返回不是数字类型";
return false;
}
TorrentPieceLength = long.Parse(PieceLengthNumb.ToString());
break;
case "PIECES":
TorrentPieces = GetKeyByte(TorrentBytes, ref StarIndex);
break;
case "PUBLISHER":
TorrentPublisher = GetKeyText(TorrentBytes, ref StarIndex).ToString();
break;
case "PUBLISHER.UTF-8":
TorrentPublisherUTF8 = GetKeyText(TorrentBytes, ref StarIndex).ToString();
break;
case "PUBLISHER-URL":
TorrentPublisherUrl = GetKeyText(TorrentBytes, ref StarIndex).ToString();
break;
case "PUBLISHER-URL.UTF-8":
TorrentPublisherUrlUTF8 = GetKeyText(TorrentBytes, ref StarIndex).ToString();
break;
case "NODES":
int NodesCount = 0;
ArrayList _NodesList = GetKeyData(TorrentBytes, ref StarIndex, ref NodesCount);
int IPCount= _NodesList.Count/2;
for (int i = 0; i != IPCount; i++)
{
TorrentNotes.Add(_NodesList[i * 2] + ":" + _NodesList[(i * 2) + 1]);
}
break;
default:
return false;
}
return true;
}
#region 获取数据
/// <summary>
/// 获取列表方式"I1:Xe"="X" 会调用GetKeyText
/// </summary>
/// <param name="TorrentBytes"></param>
/// <param name="StarIndex"></param>
/// <param name="ListCount"></param>
private ArrayList GetKeyData(byte[] TorrentBytes, ref int StarIndex, ref int ListCount)
{
ArrayList _TempList = new ArrayList();
while (true)
{
string TextStar = Encoding.UTF8.GetString(TorrentBytes, StarIndex, 1);
switch (TextStar)
{
case "l":
StarIndex++;
ListCount++;
break;
case "e":
ListCount--;
StarIndex++;
if (ListCount == 0) return _TempList;
break;
case "i":
_TempList.Add(GetKeyNumb(TorrentBytes,ref
StarIndex).ToString());
break;
default:
object ListText = GetKeyText(TorrentBytes, ref StarIndex);
if (ListText != null)
{
_TempList.Add(ListText.ToString());
}
else
{
if (OpenError.Length == 0)
{
OpenError = "错误的Torrent文件，ANNOUNCE-LIST 错误";
return _TempList;
}
}
break;
}
}
}
/// <summary>
/// 获取字符串
/// </summary>
/// <param name="TorrentBytes"></param>
/// <param name="StarIndex"></param>
/// <returns></returns>
private object GetKeyText(byte[] TorrentBytes, ref int StarIndex)
{
int Numb = 0;
int LeftNumb = 0;
for (int i = StarIndex; i != TorrentBytes.Length; i++)
{
if ((char)TorrentBytes[i] == ':') break;
if ((char)TorrentBytes[i] == 'e')
{
LeftNumb++;
continue;
}
Numb++;
}
StarIndex += LeftNumb;
string TextNumb = Encoding.UTF8.GetString(TorrentBytes, StarIndex, Numb);
try
{
int ReadNumb = Int32.Parse(TextNumb);
StarIndex = StarIndex + Numb + 1;
object KeyText = Encoding.UTF8.GetString(TorrentBytes, StarIndex, ReadNumb);
StarIndex += ReadNumb;
return KeyText;
}
catch
{
return null;
}
}
/// <summary>
/// 获取数字
/// </summary>
/// <param name="TorrentBytes"></param>
/// <param name="StarIndex"></param>
private object GetKeyNumb(byte[] TorrentBytes, ref int StarIndex)
{
if (Encoding.UTF8.GetString(TorrentBytes, StarIndex, 1) == "i")
{
int Numb = 0;
for (int i = StarIndex; i != TorrentBytes.Length; i++)
{
if ((char)TorrentBytes[i] == 'e') break;
Numb++;
}
StarIndex++;
long RetNumb = 0;
try
{
RetNumb=long.Parse(Encoding.UTF8.GetString(TorrentBytes, StarIndex, Numb-1));
StarIndex += Numb;
return RetNumb;
}
catch
{
return null;
}
}
else
{
return null;
}
}
/// <summary>
/// 获取BYTE数据
/// </summary>
/// <param name="TorrentBytes"></param>
/// <param name="StarIndex"></param>
/// <returns></returns>
private byte[] GetKeyByte(byte[] TorrentBytes, ref int StarIndex)
{
int Numb = 0;
for (int i = StarIndex; i != TorrentBytes.Length; i++)
{
if ((char)TorrentBytes[i] == ':') break;
Numb++;
}
string TextNumb = Encoding.UTF8.GetString(TorrentBytes, StarIndex, Numb);
try
{
int ReadNumb = Int32.Parse(TextNumb);
StarIndex = StarIndex + Numb + 1;
System.IO.MemoryStream KeyMemory = new System.IO.MemoryStream(TorrentBytes, StarIndex, ReadNumb);
byte[] KeyBytes = new byte[ReadNumb];
KeyMemory.Read(KeyBytes, 0, ReadNumb);
KeyMemory.Close();
StarIndex += ReadNumb;
return KeyBytes;
}
catch
{
return null;
}
}
/// <summary>
/// 对付INFO的结构
/// </summary>
/// <param name="TorrentBytes"></param>
/// <param name="StarIndex"></param>
/// <param name="ListCount"></param>
private void GetFileInfo(byte[] TorrentBytes,ref int StarIndex,ref int ListCount)
{
if ((char)TorrentBytes[StarIndex] != 'd') return;
StarIndex++;
if(GetKeyText(TorrentBytes, ref StarIndex).ToString().ToUpper()=="FILES")
{
TorrentFileInfoClass Info = new TorrentFileInfoClass();
while (true)
{
string TextStar = Encoding.UTF8.GetString(TorrentBytes, StarIndex, 1);
switch (TextStar)
{
case "l":
StarIndex++;
ListCount++;
break;
case "e":
ListCount--;
StarIndex++;
if (ListCount == 1) TorrentFileInfo.Add(Info);
if (ListCount == 0) return;
break;
case "d":
Info = new TorrentFileInfoClass();
ListCount++;
StarIndex++;
break;
default:
object ListText = GetKeyText(TorrentBytes, ref StarIndex);
if (ListText == null) return;
switch (ListText.ToString().ToUpper()) //转换为大写
{
case "ED2K":
Info.De2K = GetKeyText(TorrentBytes, ref StarIndex).ToString();
break;
case "FILEHASH":
Info.FileHash = GetKeyText(TorrentBytes, ref StarIndex).ToString();
break;
case "LENGTH":
Info.Length = Convert.ToInt64(GetKeyNumb(TorrentBytes, ref StarIndex));
break;
case "PA TH":
int PathCount=0;
ArrayList PathList = GetKeyData(TorrentBytes, ref StarIndex, ref PathCount);
string Temp = "";
for (int i = 0; i != PathList.Count; i++)
{
Temp += PathList[i].ToString();
}
Info.Path=Temp;
break;
case "PA TH.UTF-8":
int PathUtf8Count = 0;
ArrayList Pathutf8List = GetKeyData(TorrentBytes, ref StarIndex, ref PathUtf8Count);
string UtfTemp = "";
for (int i = 0; i != Pathutf8List.Count; i++)
{
UtfTemp += Pathutf8List[i].ToString();
}
Info.PathUTF8=UtfTemp;
break;
}
break;
}
}
}
}
#endregion
/// <summary>
/// 对应结构INFO 多个文件时
/// </summary>
public class TorrentFileInfoClass
{
private string path = "";
private string pathutf8 = "";
private long length = 0;
private string md5sum = "";
private string de2k = "";
private string filehash = "";
/// <summary>
/// 文件路径
/// </summary>
public string Path { get { return path; } set { path = value; } }
/// <summary>
/// UTF8的名称
/// </summary>
public string PathUTF8 { get { return pathutf8; } set { pathutf8 = value; } }
/// <summary>
/// 文件大小
/// </summary>
public long Length { get { return length; } set { length = value; } }
/// <summary>
/// MD5验效（可选）
/// </summary>
public string MD5Sum { get { return md5sum; } set { md5sum = value; } }
/// <summary>
/// ED2K 未知
/// </summary>
public string De2K { get { return de2k; } set { de2k = value; } }
/// <summary>
/// FileHash 未知
/// </summary>
public string FileHash { get { return filehash; } set { filehash = value; } } }
}
}。