mirror of
https://github.com/91270/MeiamSubtitles.git
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378 lines
14 KiB
C#
378 lines
14 KiB
C#
using Jellyfin.MeiamSub.Thunder.Model;
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using MediaBrowser.Controller.Providers;
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using MediaBrowser.Controller.Subtitles;
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using MediaBrowser.Model.Providers;
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using Microsoft.Extensions.Logging;
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using System;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.IO;
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using System.Linq;
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using System.Net;
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using System.Net.Http;
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using System.Net.Http.Headers;
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using System.Security.Cryptography;
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using System.Text;
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using System.Text.Json;
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using System.Threading;
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using System.Threading.Tasks;
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namespace Jellyfin.MeiamSub.Thunder
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{
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/// <summary>
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/// 迅雷看看字幕提供程序
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/// 负责与迅雷 API 进行交互，通过 CID (Content ID) 匹配并下载字幕。
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/// <para>修改人: Meiam</para>
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/// <para>修改时间: 2025-12-22</para>
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/// </summary>
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public class ThunderProvider : ISubtitleProvider, IHasOrder
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{
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#region 变量声明
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public const string ASS = "ass";
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public const string SSA = "ssa";
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public const string SRT = "srt";
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private readonly ILogger<ThunderProvider> _logger;
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private readonly IHttpClientFactory _httpClientFactory;
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private static readonly JsonSerializerOptions _deserializeOptions = new JsonSerializerOptions
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{
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PropertyNamingPolicy = JsonNamingPolicy.SnakeCaseLower
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};
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public int Order => 100;
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public string Name => "MeiamSub.Thunder";
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/// <summary>
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/// 支持电影、剧集
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/// </summary>
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public IEnumerable<VideoContentType> SupportedMediaTypes => new[] { VideoContentType.Movie, VideoContentType.Episode };
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#endregion
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#region 构造函数
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public ThunderProvider(ILogger<ThunderProvider> logger, IHttpClientFactory httpClientFactory)
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{
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_logger = logger;
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_httpClientFactory = httpClientFactory;
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_logger.LogInformation($"{Name} Init");
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}
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#endregion
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#region 查询字幕
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/// <summary>
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/// 搜索字幕 (ISubtitleProvider 接口实现)
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/// 根据媒体信息请求字幕列表。
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/// </summary>
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/// <param name="request">包含媒体路径、语言等信息的搜索请求对象</param>
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/// <param name="cancellationToken">取消令牌</param>
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/// <returns>远程字幕信息列表</returns>
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public async Task<IEnumerable<RemoteSubtitleInfo>> Search(SubtitleSearchRequest request, CancellationToken cancellationToken)
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{
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_logger.LogInformation("DEBUG: Received Search request for " + (request?.MediaPath ?? "NULL"));
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var subtitles = await SearchSubtitlesAsync(request);
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return subtitles;
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}
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/// <summary>
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/// 查询字幕
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/// </summary>
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/// <param name="request"></param>
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/// <returns></returns>
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private async Task<IEnumerable<RemoteSubtitleInfo>> SearchSubtitlesAsync(SubtitleSearchRequest request)
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{
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// 修改人: Meiam
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// 修改时间: 2025-12-22
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// 备注: 增加极致探测日志
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_logger.LogInformation("DEBUG: Entering SearchSubtitlesAsync (Thunder)");
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try
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{
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if (request == null)
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{
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_logger.LogInformation("DEBUG: Request is null");
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return Array.Empty<RemoteSubtitleInfo>();
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}
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var language = NormalizeLanguage(request.Language);
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var fileName = string.Empty;
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if (!string.IsNullOrEmpty(request.MediaPath))
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{
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fileName = Path.GetFileName(request.MediaPath);
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}
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_logger.LogInformation(Name + " Search | Target -> " + fileName + " | Language -> " + language);
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if (language != "chi")
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{
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_logger.LogInformation(Name + " Search | Summary -> Language not supported, skip search.");
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return Array.Empty<RemoteSubtitleInfo>();
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}
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if (string.IsNullOrEmpty(request.MediaPath))
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{
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_logger.LogInformation(Name + " Search | Summary -> MediaPath is empty, skip search.");
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return Array.Empty<RemoteSubtitleInfo>();
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}
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var stopWatch = Stopwatch.StartNew();
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var cid = await GetCidByFileAsync(request.MediaPath);
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stopWatch.Stop();
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_logger.LogInformation(Name + " Search | FileHash -> " + cid + " (Took " + stopWatch.ElapsedMilliseconds + "ms)");
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using var options = new HttpRequestMessage
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{
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Method = HttpMethod.Get,
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RequestUri = new Uri($"https://api-shoulei-ssl.xunlei.com/oracle/subtitle?name={Path.GetFileName(request.MediaPath)}")
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};
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using var httpClient = _httpClientFactory.CreateClient(Name);
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var response = await httpClient.SendAsync(options);
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_logger.LogInformation($"{Name} Search | Response -> {JsonSerializer.Serialize(response)}");
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if (response.StatusCode == HttpStatusCode.OK)
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{
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var subtitleResponse = JsonSerializer.Deserialize<SubtitleResponseRoot>(await response.Content.ReadAsStringAsync(), _deserializeOptions);
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if (subtitleResponse != null)
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{
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_logger.LogInformation($"{Name} Search | Response -> {JsonSerializer.Serialize(subtitleResponse)}");
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var subtitles = subtitleResponse.Data.Where(m => !string.IsNullOrEmpty(m.Name));
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var remoteSubtitles = new List<RemoteSubtitleInfo>();
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if (subtitles.Count() > 0)
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{
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foreach (var item in subtitles)
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{
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remoteSubtitles.Add(new RemoteSubtitleInfo()
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{
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Id = Base64Encode(JsonSerializer.Serialize(new DownloadSubInfo
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{
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Url = item.Url,
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Format = item.Ext,
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Language = request.Language,
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TwoLetterISOLanguageName = request.TwoLetterISOLanguageName,
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})),
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Name = $"[MEIAMSUB] {item.Name} | {(item.Langs == string.Empty ? "未知" : item.Langs)} | 迅雷",
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Author = "Meiam ",
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ProviderName = $"{Name}",
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Format = item.Ext,
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Comment = $"Format : {item.Ext}",
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IsHashMatch = cid == item.Cid,
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});
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}
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}
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_logger.LogInformation($"{Name} Search | Summary -> Get {subtitles.Count()} Subtitles");
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return remoteSubtitles;
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}
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}
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}
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catch (Exception ex)
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{
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_logger.LogError(ex, $"{Name} Search | Exception -> {ex.Message}");
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}
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_logger.LogInformation($"{Name} Search | Summary -> Get 0 Subtitles");
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return Array.Empty<RemoteSubtitleInfo>();
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}
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#endregion
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#region 下载字幕
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/// <summary>
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/// 获取字幕内容 (ISubtitleProvider 接口实现)
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/// 根据字幕 ID 下载具体的字幕文件流。
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/// </summary>
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/// <param name="id">字幕唯一标识符 (Base64 编码的 JSON 数据)</param>
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/// <param name="cancellationToken">取消令牌</param>
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/// <returns>包含字幕流的响应对象</returns>
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public async Task<SubtitleResponse> GetSubtitles(string id, CancellationToken cancellationToken)
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{
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_logger.LogInformation($"{Name} DownloadSub | Request -> {id}");
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return await DownloadSubAsync(id);
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}
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/// <summary>
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/// 下载字幕
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/// </summary>
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/// <param name="info"></param>
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/// <returns></returns>
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private async Task<SubtitleResponse> DownloadSubAsync(string info)
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{
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// 修改人: Meiam
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// 修改时间: 2025-12-22
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// 备注: 增加异常处理
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try
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{
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var downloadSub = JsonSerializer.Deserialize<DownloadSubInfo>(Base64Decode(info));
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if (downloadSub == null)
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{
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return new SubtitleResponse();
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}
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_logger.LogInformation($"{Name} DownloadSub | Url -> {downloadSub.Url} | Format -> {downloadSub.Format} | Language -> {downloadSub.Language} ");
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using var options = new HttpRequestMessage
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{
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Method = HttpMethod.Get,
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RequestUri = new Uri(downloadSub.Url)
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};
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using var httpClient = _httpClientFactory.CreateClient(Name);
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var response = await httpClient.SendAsync(options);
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_logger.LogInformation($"{Name} DownloadSub | Response -> {response.StatusCode}");
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if (response.StatusCode == HttpStatusCode.OK)
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{
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var stream = await response.Content.ReadAsStreamAsync();
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return new SubtitleResponse()
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{
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Language = downloadSub.Language,
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IsForced = false,
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Format = downloadSub.Format,
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Stream = stream,
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};
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}
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}
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catch (Exception ex)
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{
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_logger.LogError(ex, "{Provider} DownloadSub | Exception -> [{Type}] {Message}", Name, ex.GetType().Name, ex.Message);
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}
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return new SubtitleResponse();
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}
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#endregion
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#region 内部方法
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/// <summary>
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/// Base64 加密
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/// </summary>
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/// <param name="plainText">明文</param>
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/// <returns></returns>
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public static string Base64Encode(string plainText)
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{
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var plainTextBytes = Encoding.UTF8.GetBytes(plainText);
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return Convert.ToBase64String(plainTextBytes);
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}
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/// <summary>
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/// Base64 解密
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/// </summary>
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/// <param name="base64EncodedData"></param>
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/// <returns></returns>
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public static string Base64Decode(string base64EncodedData)
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{
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var base64EncodedBytes = Convert.FromBase64String(base64EncodedData);
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return Encoding.UTF8.GetString(base64EncodedBytes);
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}
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/// <summary>
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/// 提取格式化字幕类型
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/// </summary>
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/// <param name="text"></param>
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/// <returns></returns>
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protected string ExtractFormat(string text)
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{
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if (string.IsNullOrEmpty(text))
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{
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return null;
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}
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text = text.ToLower();
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if (text.Contains(ASS)) return ASS;
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if (text.Contains(SSA)) return SSA;
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if (text.Contains(SRT)) return SRT;
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return null;
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}
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/// <summary>
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/// 规范化语言代码
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/// </summary>
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/// <param name="language"></param>
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/// <returns></returns>
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private static string NormalizeLanguage(string language)
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{
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if (string.IsNullOrEmpty(language)) return language;
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if (language.Equals("zh-CN", StringComparison.OrdinalIgnoreCase) ||
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language.Equals("zh-TW", StringComparison.OrdinalIgnoreCase) ||
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language.Equals("zh-HK", StringComparison.OrdinalIgnoreCase) ||
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language.Equals("zh", StringComparison.OrdinalIgnoreCase) ||
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language.Equals("zho", StringComparison.OrdinalIgnoreCase) ||
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language.Equals("chi", StringComparison.OrdinalIgnoreCase))
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{
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return "chi";
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}
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if (language.Equals("en", StringComparison.OrdinalIgnoreCase) ||
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language.Equals("eng", StringComparison.OrdinalIgnoreCase))
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{
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return "eng";
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}
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return language;
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}
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/// <summary>
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/// 异步计算文件 CID (迅雷专用算法)
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/// <para>修改人: Meiam</para>
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/// <para>修改时间: 2025-12-22</para>
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/// <para>备注: 采用异步 I/O 读取文件特定位置的数据块进行 SHA1 计算。</para>
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/// </summary>
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/// <param name="filePath">文件路径</param>
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/// <returns>计算得到的 CID 字符串</returns>
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private async Task<string> GetCidByFileAsync(string filePath)
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{
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// 修改人: Meiam
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// 修改时间: 2025-12-22
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// 备注: 改造为异步方法，优化 I/O 性能，使用 SHA1.Create() 替代旧 API，并增加 using 语句释放资源
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using (var stream = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.Read, 4096, FileOptions.Asynchronous))
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{
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var fileSize = new FileInfo(filePath).Length;
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using (var sha1 = SHA1.Create())
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{
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var buffer = new byte[0xf000];
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if (fileSize < 0xf000)
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{
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await stream.ReadExactlyAsync(buffer, 0, (int)fileSize);
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buffer = sha1.ComputeHash(buffer, 0, (int)fileSize);
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}
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else
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{
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await stream.ReadExactlyAsync(buffer, 0, 0x5000);
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stream.Seek(fileSize / 3, SeekOrigin.Begin);
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await stream.ReadExactlyAsync(buffer, 0x5000, 0x5000);
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stream.Seek(fileSize - 0x5000, SeekOrigin.Begin);
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await stream.ReadExactlyAsync(buffer, 0xa000, 0x5000);
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buffer = sha1.ComputeHash(buffer, 0, 0xf000);
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}
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var result = "";
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foreach (var i in buffer)
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{
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result += string.Format("{0:X2}", i);
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}
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return result;
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}
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}
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}
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#endregion
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}
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} |