├── .gitignore ├── BTTrackerDemo.sln ├── BTTrackerDemo ├── BTTrackerDemo.csproj ├── Controllers │ ├── AnnounceController.cs │ └── Dtos │ │ └── GetPeersInfoInput.cs ├── Program.cs ├── Properties │ └── launchSettings.json ├── Startup.cs ├── Tracker │ ├── AnnounceInputParameters.cs │ ├── BitTorrentManager.cs │ ├── BitTorrentStatus.cs │ ├── IBitTorrentManager.cs │ ├── Peer.cs │ ├── TorrentEvent.cs │ └── TrackerServerConsts.cs ├── appsettings.Development.json └── appsettings.json └── LICENSE /.gitignore: -------------------------------------------------------------------------------- 1 | # Created by .ignore support plugin (hsz.mobi) 2 | ### JetBrains template 3 | # Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio and WebStorm 4 | # Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839 5 | 6 | # User-specific stuff 7 | .idea/**/workspace.xml 8 | .idea/**/tasks.xml 9 | .idea/**/dictionaries 10 | .idea/**/shelf 11 | 12 | # Sensitive or high-churn files 13 | .idea/**/dataSources/ 14 | .idea/**/dataSources.ids 15 | .idea/**/dataSources.local.xml 16 | .idea/**/sqlDataSources.xml 17 | .idea/**/dynamic.xml 18 | .idea/**/uiDesigner.xml 19 | .idea/**/dbnavigator.xml 20 | 21 | # Gradle 22 | .idea/**/gradle.xml 23 | .idea/**/libraries 24 | 25 | # CMake 26 | cmake-build-debug/ 27 | cmake-build-release/ 28 | 29 | # Mongo Explorer plugin 30 | .idea/**/mongoSettings.xml 31 | 32 | # File-based project format 33 | *.iws 34 | 35 | # IntelliJ 36 | out/ 37 | 38 | # mpeltonen/sbt-idea plugin 39 | .idea_modules/ 40 | 41 | # JIRA plugin 42 | atlassian-ide-plugin.xml 43 | 44 | # Cursive Clojure plugin 45 | .idea/replstate.xml 46 | 47 | # Crashlytics plugin (for Android Studio and IntelliJ) 48 | com_crashlytics_export_strings.xml 49 | crashlytics.properties 50 | crashlytics-build.properties 51 | fabric.properties 52 | 53 | # Editor-based Rest Client 54 | .idea/httpRequests 55 | ### VisualStudio template 56 | ## 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2 | using System.Collections.Generic; 3 | using System.Threading.Tasks; 4 | using BencodeNET.Objects; 5 | using BTTrackerDemo.Controllers.Dtos; 6 | using BTTrackerDemo.Tracker; 7 | using Microsoft.AspNetCore.Http; 8 | using Microsoft.AspNetCore.Mvc; 9 | 10 | namespace BTTrackerDemo.Controllers 11 | { 12 | public class AnnounceController : Controller 13 | { 14 | private readonly IHttpContextAccessor _httpContextAccessor; 15 | private readonly IBitTorrentManager _bitTorrentManager; 16 | 17 | public AnnounceController(IHttpContextAccessor httpContextAccessor, IBitTorrentManager bitTorrentManager) 18 | { 19 | _httpContextAccessor = httpContextAccessor; 20 | _bitTorrentManager = bitTorrentManager; 21 | } 22 | 23 | [HttpGet] 24 | [Route("/Announce/GetPeersInfo")] 25 | public async Task GetPeersInfo(GetPeersInfoInput input) 26 | { 27 | // 如果 BT 客户端没有传递 IP，则通过 Context 获得。 28 | if (string.IsNullOrEmpty(input.Ip)) input.Ip = _httpContextAccessor.HttpContext.Connection.RemoteIpAddress.MapToIPv4().ToString(); 29 | 30 | // 本机测试用。 31 | input.Ip = "127.0.0.1"; 32 | 33 | AnnounceInputParameters inputPara = input; 34 | var resultDict = new BDictionary(); 35 | 36 | // 如果产生了错误，则不执行其他操作，直接返回结果。 37 | if (inputPara.Error.Count == 0) 38 | { 39 | _bitTorrentManager.UpdatePeer(input.Info_Hash,inputPara); 40 | _bitTorrentManager.ClearZombiePeers(input.Info_Hash,TimeSpan.FromMinutes(10)); 41 | var peers = _bitTorrentManager.GetPeers(input.Info_Hash); 42 | 43 | HandlePeersData(resultDict,peers,inputPara); 44 | 45 | // 构建剩余字段信息 46 | // 客户端等待时间 47 | resultDict.Add(TrackerServerConsts.IntervalKey,new BNumber((int)TimeSpan.FromSeconds(30).TotalSeconds)); 48 | // 最小等待间隔 49 | resultDict.Add(TrackerServerConsts.MinIntervalKey,new BNumber((int)TimeSpan.FromSeconds(30).TotalSeconds)); 50 | // Tracker 服务器的 Id 51 | resultDict.Add(TrackerServerConsts.TrackerIdKey,new BString("Tracker-DEMO")); 52 | // 已完成的 Peer 数量 53 | resultDict.Add(TrackerServerConsts.CompleteKey,new BNumber(_bitTorrentManager.GetComplete(input.Info_Hash))); 54 | // 非做种状态的 Peer 数量 55 | resultDict.Add(TrackerServerConsts.IncompleteKey,new BNumber(_bitTorrentManager.GetInComplete(input.Info_Hash))); 56 | } 57 | else 58 | { 59 | resultDict = inputPara.Error; 60 | } 61 | 62 | // 写入响应结果。 63 | var resultDictBytes = resultDict.EncodeAsBytes(); 64 | var response = _httpContextAccessor.HttpContext.Response; 65 | response.ContentType = "text/plain"; 66 | response.StatusCode = 200; 67 | response.ContentLength = resultDictBytes.Length; 68 | await response.Body.WriteAsync(resultDictBytes); 69 | } 70 | 71 | /// 72 | /// 将 Peer 集合的数据转换为 BT 协议规定的格式 73 | /// 74 | private void HandlePeersData(BDictionary resultDict, IReadOnlyList peers, AnnounceInputParameters inputParameters) 75 | { 76 | var total = Math.Min(peers.Count, inputParameters.PeerWantCount); 77 | //var startIndex = new Random().Next(total); 78 | 79 | // 判断当前 BT 客户端是否需要紧凑模式的数据。 80 | if (inputParameters.IsEnableCompact) 81 | { 82 | var compactResponse = new byte[total * 6]; 83 | for (int index =0; index 6 | /// 种子的唯一 Hash 标识。 7 | /// 8 | public string Info_Hash { get; set; } 9 | 10 | /// 11 | /// 客户端的随机 Id，由 BT 客户端生成。 12 | /// 13 | public string Peer_Id { get; set; } 14 | 15 | /// 16 | /// 客户端的 IP 地址。 17 | /// 18 | public string Ip { get; set; } 19 | 20 | /// 21 | /// 客户端监听的端口。 22 | /// 23 | public int Port { get; set; } 24 | 25 | /// 26 | /// 已经上传的数据大小。 27 | /// 28 | public long Uploaded { get; set; } 29 | 30 | /// 31 | /// 已经下载的数据大小。 32 | /// 33 | public long Downloaded { get; set; } 34 | 35 | /// 36 | /// 事件表示，具体可以转换为 枚举的具体值。 37 | /// 38 | public string Event { get; set; } 39 | 40 | /// 41 | /// 该客户端剩余待下载的数据。 42 | /// 43 | public long Left { get; set; } 44 | 45 | /// 46 | /// 是否启用压缩，当该值为 1 的时候，表示当前客户端接受压缩格式的 Peer 列表，即使用 47 | /// 6 字节表示一个 Peer (前 4 字节表示 IP 地址，后 2 字节表示端口号)。当该值为 0 48 | /// 的时候则表示客户端不接受。 49 | /// 50 | public int Compact { get; set; } 51 | 52 | /// 53 | /// 表示客户端想要获得的 Peer 数量。 54 | /// 55 | public int? NumWant { get; set; } 56 | } 57 | } -------------------------------------------------------------------------------- /BTTrackerDemo/Program.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Collections.Generic; 3 | using System.IO; 4 | using System.Linq; 5 | using System.Threading.Tasks; 6 | using BencodeNET.Objects; 7 | using Microsoft.AspNetCore; 8 | using Microsoft.AspNetCore.Hosting; 9 | using Microsoft.Extensions.Configuration; 10 | using Microsoft.Extensions.Hosting; 11 | using Microsoft.Extensions.Logging; 12 | 13 | namespace BTTrackerDemo 14 | { 15 | public class Program 16 | { 17 | public static void Main(string[] args) 18 | { 19 | CreateHostBuilder(args).Build().Run(); 20 | } 21 | 22 | public static IHostBuilder CreateHostBuilder(string[] args) => 23 | Host.CreateDefaultBuilder(args) 24 | .ConfigureWebHostDefaults(webBuilder => 25 | { 26 | webBuilder.UseStartup() 27 | .UseKestrel(op=>op.ListenAnyIP(5000)); 28 | }); 29 | } 30 | } -------------------------------------------------------------------------------- /BTTrackerDemo/Properties/launchSettings.json: -------------------------------------------------------------------------------- 1 | { 2 | "$schema": "http://json.schemastore.org/launchsettings.json", 3 | "iisSettings": { 4 | "windowsAuthentication": false, 5 | "anonymousAuthentication": true, 6 | "iisExpress": { 7 | "applicationUrl": "http://localhost:63438", 8 | "sslPort": 44395 9 | } 10 | }, 11 | "profiles": { 12 | "IIS Express": { 13 | "commandName": "IISExpress", 14 | "launchBrowser": true, 15 | "launchUrl": "api/values", 16 | "environmentVariables": { 17 | "ASPNETCORE_ENVIRONMENT": "Development" 18 | } 19 | }, 20 | "BTTrackerDemo": { 21 | "commandName": "Project", 22 | "launchBrowser": true, 23 | "launchUrl": "api/values", 24 | "applicationUrl": "https://localhost:5001;http://localhost:5000", 25 | "environmentVariables": { 26 | "ASPNETCORE_ENVIRONMENT": "Development" 27 | } 28 | } 29 | } 30 | } -------------------------------------------------------------------------------- /BTTrackerDemo/Startup.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Collections.Generic; 3 | using System.Linq; 4 | using System.Threading.Tasks; 5 | using BTTrackerDemo.Tracker; 6 | using Microsoft.AspNetCore.Builder; 7 | using Microsoft.AspNetCore.Hosting; 8 | using Microsoft.AspNetCore.Http; 9 | using Microsoft.AspNetCore.HttpsPolicy; 10 | using Microsoft.AspNetCore.Mvc; 11 | using Microsoft.Extensions.Configuration; 12 | using Microsoft.Extensions.DependencyInjection; 13 | using Microsoft.Extensions.DependencyInjection.Extensions; 14 | using Microsoft.Extensions.Logging; 15 | using Microsoft.Extensions.Options; 16 | 17 | namespace BTTrackerDemo 18 | { 19 | public class Startup 20 | { 21 | public Startup(IConfiguration configuration) 22 | { 23 | Configuration = configuration; 24 | } 25 | 26 | public IConfiguration Configuration { get; } 27 | 28 | // This method gets called by the runtime. Use this method to add services to the container. 29 | public void ConfigureServices(IServiceCollection services) 30 | { 31 | services.AddMvc() 32 | .AddNewtonsoftJson(); 33 | services.TryAddSingleton(); 34 | services.TryAddSingleton(); 35 | } 36 | 37 | // This method gets called by the runtime. Use this method to configure the HTTP request pipeline. 38 | public void Configure(IApplicationBuilder app, IHostingEnvironment env) 39 | { 40 | if (env.IsDevelopment()) 41 | { 42 | app.UseDeveloperExceptionPage(); 43 | } 44 | else 45 | { 46 | // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts. 47 | app.UseHsts(); 48 | } 49 | 50 | app.UseHttpsRedirection(); 51 | 52 | app.UseRouting(routes => { routes.MapApplication(); }); 53 | 54 | app.UseAuthorization(); 55 | } 56 | } 57 | } -------------------------------------------------------------------------------- /BTTrackerDemo/Tracker/AnnounceInputParameters.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Net; 3 | using System.Web; 4 | using BencodeNET.Objects; 5 | using BTTrackerDemo.Controllers.Dtos; 6 | 7 | namespace BTTrackerDemo.Tracker 8 | { 9 | public class AnnounceInputParameters 10 | { 11 | /// 12 | /// 客户端 IP 端点信息。 13 | /// 14 | public IPEndPoint ClientAddress { get; } 15 | 16 | /// 17 | /// 种子的唯一 Hash 标识。 18 | /// 19 | public string InfoHash { get; } 20 | 21 | /// 22 | /// 客户端的随机 Id，由 BT 客户端生成。 23 | /// 24 | public string PeerId { get; } 25 | 26 | /// 27 | /// 已经上传的数据大小。 28 | /// 29 | public long Uploaded { get; } 30 | 31 | /// 32 | /// 已经下载的数据大小。 33 | /// 34 | public long Downloaded { get; } 35 | 36 | /// 37 | /// 事件表示，具体可以转换为 枚举的具体值。 38 | /// 39 | public TorrentEvent Event { get; } 40 | 41 | /// 42 | /// 该客户端剩余待下载的数据。 43 | /// 44 | public long Left { get; } 45 | 46 | /// 47 | /// Peer 是否允许启用压缩。 48 | /// 49 | public bool IsEnableCompact { get; } 50 | 51 | /// 52 | /// Peer 想要获得的可用的 Peer 数量。 53 | /// 54 | public int PeerWantCount { get; } 55 | 56 | /// 57 | /// 如果在请求过程当中出现了异常，则本字典包含了异常信息。 58 | /// 59 | public BDictionary Error { get; } 60 | 61 | public AnnounceInputParameters(GetPeersInfoInput apiInput) 62 | { 63 | Error = new BDictionary(); 64 | 65 | ClientAddress = ConvertClientAddress(apiInput); 66 | InfoHash = ConvertInfoHash(apiInput); 67 | Event = ConvertTorrentEvent(apiInput); 68 | PeerId = apiInput.Peer_Id; 69 | Uploaded = apiInput.Uploaded; 70 | Downloaded = apiInput.Downloaded; 71 | Left = apiInput.Left; 72 | IsEnableCompact = apiInput.Compact == 1; 73 | PeerWantCount = apiInput.NumWant ?? 30; 74 | } 75 | 76 | /// 77 | /// 到当前类型的隐式转换定义。 78 | /// 79 | public static implicit operator AnnounceInputParameters(GetPeersInfoInput input) 80 | { 81 | return new AnnounceInputParameters(input); 82 | } 83 | 84 | /// 85 | /// 将客户端传递的 IP 地址与端口转换为 类型。 86 | /// 87 | private IPEndPoint ConvertClientAddress(GetPeersInfoInput apiInput) 88 | { 89 | if (IPAddress.TryParse(apiInput.Ip, out IPAddress ipAddress)) 90 | { 91 | return new IPEndPoint(ipAddress,apiInput.Port); 92 | } 93 | 94 | return null; 95 | } 96 | 97 | /// 98 | /// 将客户端传递的字符串 Event 转换为 枚举。 99 | /// 100 | private TorrentEvent ConvertTorrentEvent(GetPeersInfoInput apiInput) 101 | { 102 | switch (apiInput.Event) 103 | { 104 | case "started": 105 | return TorrentEvent.Started; 106 | case "stopped": 107 | return TorrentEvent.Stopped; 108 | case "completed": 109 | return TorrentEvent.Completed; 110 | default: 111 | return TorrentEvent.None; 112 | } 113 | } 114 | 115 | /// 116 | /// 将 info_hash 参数从 URL 编码转换为标准的字符串。 117 | /// 118 | private string ConvertInfoHash(GetPeersInfoInput apiInput) 119 | { 120 | var infoHashBytes = HttpUtility.UrlDecodeToBytes(apiInput.Info_Hash); 121 | if (infoHashBytes == null) 122 | { 123 | Error.Add(TrackerServerConsts.FailureKey,new BString("info_hash 参数不能为空.")); 124 | return null; 125 | } 126 | 127 | if (infoHashBytes.Length != 20) 128 | { 129 | Error.Add(TrackerServerConsts.FailureKey,new BString($"info_hash 参数的长度 {{{infoHashBytes.Length}}} 不符合 BT 协议规范.")); 130 | } 131 | 132 | return BitConverter.ToString(infoHashBytes); 133 | } 134 | } 135 | } -------------------------------------------------------------------------------- /BTTrackerDemo/Tracker/BitTorrentManager.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Collections.Concurrent; 3 | using System.Collections.Generic; 4 | using System.Linq; 5 | 6 | namespace BTTrackerDemo.Tracker 7 | { 8 | public class BitTorrentManager : IBitTorrentManager 9 | { 10 | private readonly ConcurrentDictionary> _peers; 11 | private readonly ConcurrentDictionary _bitTorrentStatus; 12 | 13 | public BitTorrentManager() 14 | { 15 | _peers = new ConcurrentDictionary>(); 16 | _bitTorrentStatus = new ConcurrentDictionary(); 17 | } 18 | 19 | public Peer AddPeer(string infoHash, AnnounceInputParameters inputParameters) 20 | { 21 | CheckParameters(infoHash, inputParameters); 22 | 23 | var newPeer = new Peer(inputParameters); 24 | 25 | if (!_peers.ContainsKey(infoHash)) 26 | { 27 | _peers.TryAdd(infoHash, new List {newPeer}); 28 | } 29 | 30 | _peers[infoHash].Add(newPeer); 31 | 32 | UpdateBitTorrentStatus(infoHash); 33 | 34 | return newPeer; 35 | } 36 | 37 | public void DeletePeer(string infoHash, AnnounceInputParameters inputParameters) 38 | { 39 | CheckParameters(infoHash, inputParameters); 40 | 41 | if (!_peers.ContainsKey(infoHash)) return; 42 | 43 | _peers[infoHash].RemoveAll(p => p.UniqueId == inputParameters.PeerId); 44 | 45 | UpdateBitTorrentStatus(infoHash); 46 | } 47 | 48 | public void UpdatePeer(string infoHash, AnnounceInputParameters inputParameters) 49 | { 50 | CheckParameters(infoHash, inputParameters); 51 | 52 | if (!_peers.ContainsKey(inputParameters.InfoHash)) _peers.TryAdd(infoHash, new List()); 53 | if (!_bitTorrentStatus.ContainsKey(inputParameters.InfoHash)) _bitTorrentStatus.TryAdd(infoHash, new BitTorrentStatus()); 54 | 55 | // 如果 Peer 不存在则添加，否则更新其状态。 56 | var peers = _peers[infoHash]; 57 | var peer = peers.FirstOrDefault(p => p.UniqueId == inputParameters.PeerId); 58 | if (peer == null) 59 | { 60 | AddPeer(infoHash, inputParameters); 61 | } 62 | else 63 | { 64 | peer.UpdateStatus(inputParameters); 65 | } 66 | 67 | // 根据事件更新种子状态与 Peer 信息。 68 | if (inputParameters.Event == TorrentEvent.Stopped) DeletePeer(infoHash,inputParameters); 69 | if (inputParameters.Event == TorrentEvent.Completed) _bitTorrentStatus[infoHash].Downloaded++; 70 | 71 | UpdateBitTorrentStatus(infoHash); 72 | } 73 | 74 | public IReadOnlyList GetPeers(string infoHash) 75 | { 76 | if (!_peers.ContainsKey(infoHash)) return null; 77 | return _peers[infoHash]; 78 | } 79 | 80 | public void ClearZombiePeers(string infoHash, TimeSpan expiry) 81 | { 82 | if (!_peers.ContainsKey(infoHash)) return; 83 | 84 | var now = DateTime.Now; 85 | 86 | _peers[infoHash].RemoveAll(p => now - p.LastRequestTrackerTime > expiry); 87 | } 88 | 89 | public int GetComplete(string infoHash) 90 | { 91 | if (_bitTorrentStatus.TryGetValue(infoHash, out BitTorrentStatus status)) 92 | { 93 | return status.Completed; 94 | } 95 | 96 | return 0; 97 | } 98 | 99 | public int GetInComplete(string infoHash) 100 | { 101 | if (_bitTorrentStatus.TryGetValue(infoHash, out BitTorrentStatus status)) 102 | { 103 | return status.InCompleted; 104 | } 105 | 106 | return 0; 107 | } 108 | 109 | /// 110 | /// 更新种子的统计信息。 111 | /// 112 | private void UpdateBitTorrentStatus(string infoHash) 113 | { 114 | if (!_peers.ContainsKey(infoHash)) return; 115 | if (!_bitTorrentStatus.ContainsKey(infoHash)) return; 116 | 117 | // 遍历种子所有的 Peer 状态，对种子统计信息进行处理。 118 | int complete = 0, incomplete = 0; 119 | var peers = _peers[infoHash]; 120 | foreach (var peer in peers) 121 | { 122 | if (peer.IsCompleted) complete++; 123 | else incomplete++; 124 | } 125 | 126 | _bitTorrentStatus[infoHash].Completed = complete; 127 | _bitTorrentStatus[infoHash].InCompleted = incomplete; 128 | } 129 | 130 | /// 131 | /// 检测参数与种子唯一标识的状态。 132 | /// 133 | private void CheckParameters(string infoHash,AnnounceInputParameters inputParameters) 134 | { 135 | if (string.IsNullOrEmpty(infoHash)) throw new Exception("种子的唯一标识不能为空。"); 136 | if (inputParameters == null) throw new Exception("BT 客户端传入的参数不能为空。"); 137 | } 138 | } 139 | } -------------------------------------------------------------------------------- /BTTrackerDemo/Tracker/BitTorrentStatus.cs: -------------------------------------------------------------------------------- 1 | using BencodeNET.Objects; 2 | 3 | namespace BTTrackerDemo.Tracker 4 | { 5 | /// 6 | /// 用于表示某个种子的状态与统计信息。 7 | /// 8 | public class BitTorrentStatus 9 | { 10 | /// 11 | /// 下载完成的 Peer 数量。 12 | /// 13 | public BNumber Downloaded { get; set; } 14 | 15 | /// 16 | /// 已经完成种子下载的 Peer 数量。 17 | /// 18 | public BNumber Completed { get; set; } 19 | 20 | /// 21 | /// 正在下载种子的 Peer 数量。 22 | /// 23 | public BNumber InCompleted { get; set; } 24 | 25 | public BitTorrentStatus() 26 | { 27 | Downloaded = new BNumber(0); 28 | Completed = new BNumber(0); 29 | InCompleted = new BNumber(0); 30 | } 31 | } 32 | } -------------------------------------------------------------------------------- /BTTrackerDemo/Tracker/IBitTorrentManager.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Collections.Generic; 3 | 4 | namespace BTTrackerDemo.Tracker 5 | { 6 | /// 7 | /// 用于管理 BT 种子与其关联的 Peer 集合。 8 | /// 9 | public interface IBitTorrentManager 10 | { 11 | /// 12 | /// 添加一个新的 Peer 到指定种子关联的集合当中。 13 | /// 14 | /// 种子的唯一标识。 15 | /// BT 客户端传入的参数信息。 16 | Peer AddPeer(string infoHash,AnnounceInputParameters inputParameters); 17 | 18 | /// 19 | /// 根据参数删除指定种子的 Peer 信息。 20 | /// 21 | /// 种子的唯一标识。 22 | /// BT 客户端传入的参数信息。 23 | void DeletePeer(string infoHash,AnnounceInputParameters inputParameters); 24 | 25 | /// 26 | /// 更新指定种子的某个 Peer 状态。 27 | /// 28 | /// 种子的唯一标识。 29 | /// BT 客户端传入的参数信息。 30 | void UpdatePeer(string infoHash, AnnounceInputParameters inputParameters); 31 | 32 | /// 33 | /// 获得指定种子的可用 Peer 集合。 34 | /// 35 | /// 种子的唯一标识。 36 | /// 当前种子关联的 Peer 列表。 37 | IReadOnlyList GetPeers(string infoHash); 38 | 39 | /// 40 | /// 清理指定种子内部不活跃的 Peer 。 41 | /// 42 | /// 种子的唯一标识。 43 | /// 超时周期，超过这个时间的 Peer 将会被清理掉。 44 | void ClearZombiePeers(string infoHash,TimeSpan expiry); 45 | 46 | /// 47 | /// 获得指定种子已经完成下载的 Peer 数量。 48 | /// 49 | /// 种子的唯一标识。 50 | int GetComplete(string infoHash); 51 | 52 | /// 53 | /// 获得指定种子正在下载的 Peer 数量。 54 | /// 55 | /// 种子的唯一标识。 56 | int GetInComplete(string infoHash); 57 | } 58 | } -------------------------------------------------------------------------------- /BTTrackerDemo/Tracker/Peer.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Net; 3 | using BencodeNET.Objects; 4 | 5 | namespace BTTrackerDemo.Tracker 6 | { 7 | /// 8 | /// 每个 BT 下载客户端的定义。 9 | /// 10 | public class Peer 11 | { 12 | /// 13 | /// 客户端 IP 端点信息。 14 | /// 15 | public IPEndPoint ClientAddress { get; private set; } 16 | 17 | /// 18 | /// 客户端的随机 Id，由 BT 客户端生成。 19 | /// 20 | public string PeerId { get; private set; } 21 | 22 | /// 23 | /// 客户端唯一标识。 24 | /// 25 | public string UniqueId { get; private set; } 26 | 27 | /// 28 | /// 客户端在本次会话过程中下载的数据量。(以 Byte 为单位) 29 | /// 30 | public long DownLoaded { get; private set; } 31 | 32 | /// 33 | /// 客户端在本次会话过程当中上传的数据量。(以 Byte 为单位) 34 | /// 35 | public long Uploaded { get; private set; } 36 | 37 | /// 38 | /// 客户端的下载速度。(以 Byte/秒 为单位) 39 | /// 40 | public long DownloadSpeed { get; private set; } 41 | 42 | /// 43 | /// 客户端的上传速度。(以 Byte/秒 为单位) 44 | /// 45 | public long UploadSpeed { get; private set; } 46 | 47 | /// 48 | /// 客户端是否完成了当前种子，True 为已经完成，False 为还未完成。 49 | /// 50 | public bool IsCompleted { get; private set; } 51 | 52 | /// 53 | /// 最后一次请求 Tracker 服务器的时间。 54 | /// 55 | public DateTime LastRequestTrackerTime { get; private set; } 56 | 57 | /// 58 | /// Peer 还需要下载的数量。 59 | /// 60 | public long Left { get; private set; } 61 | 62 | public Peer() { } 63 | 64 | public Peer(AnnounceInputParameters inputParameters) 65 | { 66 | UniqueId = inputParameters.PeerId; 67 | 68 | // 根据输入参数更新 Peer 的状态。 69 | UpdateStatus(inputParameters); 70 | } 71 | 72 | /// 73 | /// 根据输入参数更新 Peer 的状态。 74 | /// 75 | /// BT 客户端请求 Tracker 服务器时传递的参数。 76 | public void UpdateStatus(AnnounceInputParameters inputParameters) 77 | { 78 | var now = DateTime.Now; 79 | 80 | var elapsedTime = (now - LastRequestTrackerTime).TotalSeconds; 81 | if (elapsedTime < 1) elapsedTime = 1; 82 | 83 | ClientAddress = inputParameters.ClientAddress; 84 | // 通过差值除以消耗的时间，得到每秒的大概下载速度。 85 | DownloadSpeed = (int) ((inputParameters.Downloaded - DownLoaded) / elapsedTime); 86 | DownLoaded = inputParameters.Downloaded; 87 | UploadSpeed = (int) ((inputParameters.Uploaded) / elapsedTime); 88 | Uploaded = inputParameters.Uploaded; 89 | Left = inputParameters.Left; 90 | PeerId = inputParameters.PeerId; 91 | LastRequestTrackerTime = now; 92 | 93 | // 如果没有剩余数据，则表示 Peer 已经完成下载。 94 | if (Left == 0) IsCompleted = true; 95 | } 96 | 97 | /// 98 | /// 将 Peer 信息进行 B 编码，按照协议处理为字典。 99 | /// 100 | public BDictionary ToEncodedDictionary() 101 | { 102 | return new BDictionary 103 | { 104 | {TrackerServerConsts.PeerIdKey,new BString(PeerId)}, 105 | {TrackerServerConsts.Ip,new BString(ClientAddress.Address.ToString())}, 106 | {TrackerServerConsts.Port,new BNumber(ClientAddress.Port)} 107 | }; 108 | } 109 | 110 | /// 111 | /// 将 Peer 信息进行紧凑编码成字节组。 112 | /// 113 | public byte[] ToBytes() 114 | { 115 | var portBytes = BitConverter.GetBytes(IPAddress.HostToNetworkOrder((short) ClientAddress.Port)); 116 | var addressBytes = ClientAddress.Address.GetAddressBytes(); 117 | 118 | var resultBytes = new byte[portBytes.Length + addressBytes.Length]; 119 | 120 | // 根据协议规定，首部的 4 字节为 IP 地址，尾部的 2 自己为端口信息 121 | Array.Copy(addressBytes,resultBytes,addressBytes.Length); 122 | Array.Copy(portBytes,0,resultBytes,addressBytes.Length,portBytes.Length); 123 | 124 | return resultBytes; 125 | } 126 | } 127 | } -------------------------------------------------------------------------------- /BTTrackerDemo/Tracker/TorrentEvent.cs: -------------------------------------------------------------------------------- 1 | namespace BTTrackerDemo.Tracker 2 | { 3 | public enum TorrentEvent 4 | { 5 | /// 6 | /// 未知状态。 7 | /// 8 | None, 9 | /// 10 | /// 已开始。 11 | /// 12 | Started, 13 | /// 14 | /// 已停止。 15 | /// 16 | Stopped, 17 | /// 18 | /// 已完成。 19 | /// 20 | Completed 21 | } 22 | } -------------------------------------------------------------------------------- /BTTrackerDemo/Tracker/TrackerServerConsts.cs: -------------------------------------------------------------------------------- 1 | using BencodeNET.Objects; 2 | 3 | namespace BTTrackerDemo.Tracker 4 | { 5 | /// 6 | /// 常用的字典 KEY。 7 | /// 8 | public static class TrackerServerConsts 9 | { 10 | public static readonly BString PeerIdKey = new BString("peer id"); 11 | public static readonly BString PeersKey = new BString("peers"); 12 | public static readonly BString IntervalKey = new BString("interval"); 13 | public static readonly BString MinIntervalKey = new BString("min interval"); 14 | public static readonly BString TrackerIdKey = new BString("tracker id"); 15 | public static readonly BString CompleteKey = new BString("complete"); 16 | public static readonly BString IncompleteKey = new BString("incomplete"); 17 | 18 | public static readonly BString Port = new BString("port"); 19 | public static readonly BString Ip = new BString("ip"); 20 | 21 | public static readonly string FailureKey = "failure reason"; 22 | } 23 | } -------------------------------------------------------------------------------- /BTTrackerDemo/appsettings.Development.json: -------------------------------------------------------------------------------- 1 | { 2 | "Logging": { 3 | "LogLevel": { 4 | "Default": "Debug", 5 | "System": "Information", 6 | "Microsoft": "Information" 7 | } 8 | } 9 | } 10 | -------------------------------------------------------------------------------- /BTTrackerDemo/appsettings.json: -------------------------------------------------------------------------------- 1 | { 2 | "Logging": { 3 | "LogLevel": { 4 | "Default": "Warning", 5 | "Microsoft.Hosting.Lifetime": "Information" 6 | } 7 | }, 8 | "AllowedHosts": "*" 9 | } 10 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | MIT License 2 | 3 | Copyright (c) 2019 Zony 4 | 5 | Permission is hereby granted, free of charge, to any person obtaining a copy 6 | of this software and associated documentation files (the "Software"), to deal 7 | in the Software without restriction, including without limitation the rights 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 9 | copies of the Software, and to permit persons to whom the Software is 10 | furnished to do so, subject to the following conditions: 11 | 12 | The above copyright notice and this permission notice shall be included in all 13 | copies or substantial portions of the Software. 14 | 15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 21 | SOFTWARE. 22 | --------------------------------------------------------------------------------