81 lines
3.8 KiB
C#
81 lines
3.8 KiB
C#
using System;
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using System.IO;
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using System.Reflection;
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using XWorld.Framework;
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namespace XWorld.Server.Host
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{
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public sealed class GameModuleLoader
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{
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private readonly string _publicKeyPem;
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public GameModuleLoader(string publicKeyPem = null)
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{
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_publicKeyPem = publicKeyPem;
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}
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public LoadedGameModule Load(string gamesRoot, string gameId, int version)
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{
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string moduleDir = Path.Combine(gamesRoot, gameId, version.ToString());
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if (!Directory.Exists(moduleDir))
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throw new DirectoryNotFoundException($"游戏模块目录不存在: {moduleDir}");
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if (_publicKeyPem != null)
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VerifySignature(moduleDir);
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var manifest = GameManifest.Load(Path.Combine(moduleDir, "game.json"));
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if (manifest.GameId != gameId || manifest.Version != version)
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throw new InvalidDataException(
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$"game.json 与目录不符: 期望 {gameId} v{version}, 实际 {manifest.GameId} v{manifest.Version}");
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if (manifest.MinFrameworkVersion > XWorld.Framework.FrameworkInfo.Version)
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throw new InvalidOperationException(
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$"小游戏要求最小框架版本 {manifest.MinFrameworkVersion}，当前框架 {XWorld.Framework.FrameworkInfo.Version}，请更新框架后重试");
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string serverDll = Path.Combine(moduleDir, manifest.ServerAssembly);
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if (!File.Exists(serverDll))
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throw new FileNotFoundException($"服务端入口 DLL 不存在: {serverDll}");
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var alc = new GameModuleAlc($"{gameId}@{version}", moduleDir);
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try
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{
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Assembly entryAsm = alc.LoadEntry(serverDll);
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Type entryType = entryAsm.GetType(manifest.ServerEntryType);
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if (entryType == null)
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throw new InvalidOperationException(
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$"在 {serverDll} 中找不到入口类型 {manifest.ServerEntryType}");
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if (!typeof(IGameServerRoom).IsAssignableFrom(entryType))
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throw new InvalidOperationException(
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$"{manifest.ServerEntryType} 未实现 IGameServerRoom");
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Func<IGameServerRoom> factory = () => (IGameServerRoom)Activator.CreateInstance(entryType);
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return new LoadedGameModule(gameId, version, alc, factory);
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}
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catch
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{
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alc.Unload(); // 失败路径：立刻卸载，避免遗留锁住 DLL 的 collectible ALC
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throw;
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}
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}
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// 注意：签名清单仅覆盖 ServerAssembly/CoreDll/game.json（当前小游戏 = Core+Server 两 DLL，完整覆盖）。
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// 若将来小游戏带私有第三方 DLL，发布工具(PublishLayout)与此处校验须同步把它们纳入清单。
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private void VerifySignature(string moduleDir)
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{
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string filesTxt = Path.Combine(moduleDir, "files.txt");
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string sigPath = Path.Combine(moduleDir, "files.txt.sig");
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if (!File.Exists(filesTxt) || !File.Exists(sigPath))
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throw new InvalidOperationException($"缺少签名清单，拒绝加载: {moduleDir}");
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var fm = XWorld.PublishTool.FilesManifest.Parse(File.ReadAllText(filesTxt));
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if (!XWorld.PublishTool.ManifestSigner.Verify(fm.Digest(), File.ReadAllBytes(sigPath), _publicKeyPem))
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throw new InvalidOperationException($"签名验证失败，拒绝加载: {moduleDir}");
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foreach (var kv in fm.Entries)
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{
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string p = Path.Combine(moduleDir, kv.Key);
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if (!File.Exists(p) || XWorld.PublishTool.Md5Util.OfFile(p) != kv.Value.Md5)
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throw new InvalidOperationException($"文件 md5 不符或缺失，拒绝加载: {kv.Key}");
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}
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}
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}
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}
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