mirror of
https://github.com/jellyfin/jellyfin.git
synced 2024-11-16 02:18:54 -07:00
917 lines
37 KiB
C#
917 lines
37 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Globalization;
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using System.IO;
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using System.Linq;
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using System.Net.Http;
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using System.Reflection;
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using System.Runtime.Loader;
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using System.Text;
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using System.Text.Json;
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using System.Threading.Tasks;
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using Emby.Server.Implementations.Library;
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using Jellyfin.Extensions.Json;
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using Jellyfin.Extensions.Json.Converters;
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using MediaBrowser.Common.Extensions;
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using MediaBrowser.Common.Net;
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using MediaBrowser.Common.Plugins;
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using MediaBrowser.Controller;
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using MediaBrowser.Controller.Plugins;
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using MediaBrowser.Model.Configuration;
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using MediaBrowser.Model.IO;
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using MediaBrowser.Model.Plugins;
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using MediaBrowser.Model.Updates;
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using Microsoft.Extensions.DependencyInjection;
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using Microsoft.Extensions.Logging;
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namespace Emby.Server.Implementations.Plugins
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{
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/// <summary>
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/// Defines the <see cref="PluginManager" />.
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/// </summary>
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public sealed class PluginManager : IPluginManager, IDisposable
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{
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private const string MetafileName = "meta.json";
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private readonly string _pluginsPath;
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private readonly Version _appVersion;
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private readonly List<AssemblyLoadContext> _assemblyLoadContexts;
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private readonly JsonSerializerOptions _jsonOptions;
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private readonly ILogger<PluginManager> _logger;
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private readonly IServerApplicationHost _appHost;
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private readonly ServerConfiguration _config;
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private readonly List<LocalPlugin> _plugins;
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private readonly Version _minimumVersion;
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private IHttpClientFactory? _httpClientFactory;
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/// <summary>
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/// Initializes a new instance of the <see cref="PluginManager"/> class.
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/// </summary>
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/// <param name="logger">The <see cref="ILogger{PluginManager}"/>.</param>
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/// <param name="appHost">The <see cref="IServerApplicationHost"/>.</param>
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/// <param name="config">The <see cref="ServerConfiguration"/>.</param>
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/// <param name="pluginsPath">The plugin path.</param>
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/// <param name="appVersion">The application version.</param>
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public PluginManager(
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ILogger<PluginManager> logger,
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IServerApplicationHost appHost,
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ServerConfiguration config,
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string pluginsPath,
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Version appVersion)
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{
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_logger = logger ?? throw new ArgumentNullException(nameof(logger));
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_pluginsPath = pluginsPath;
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_appVersion = appVersion ?? throw new ArgumentNullException(nameof(appVersion));
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_jsonOptions = new JsonSerializerOptions(JsonDefaults.Options)
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{
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WriteIndented = true
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};
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// We need to use the default GUID converter, so we need to remove any custom ones.
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for (int a = _jsonOptions.Converters.Count - 1; a >= 0; a--)
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{
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if (_jsonOptions.Converters[a] is JsonGuidConverter convertor)
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{
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_jsonOptions.Converters.Remove(convertor);
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break;
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}
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}
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_config = config;
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_appHost = appHost;
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_minimumVersion = new Version(0, 0, 0, 1);
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_plugins = Directory.Exists(_pluginsPath) ? DiscoverPlugins().ToList() : new List<LocalPlugin>();
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_assemblyLoadContexts = new List<AssemblyLoadContext>();
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}
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private IHttpClientFactory HttpClientFactory
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{
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get
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{
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return _httpClientFactory ??= _appHost.Resolve<IHttpClientFactory>();
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}
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}
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/// <summary>
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/// Gets the Plugins.
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/// </summary>
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public IReadOnlyList<LocalPlugin> Plugins => _plugins;
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/// <summary>
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/// Returns all the assemblies.
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/// </summary>
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/// <returns>An IEnumerable{Assembly}.</returns>
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public IEnumerable<Assembly> LoadAssemblies()
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{
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// Attempt to remove any deleted plugins and change any successors to be active.
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for (int i = _plugins.Count - 1; i >= 0; i--)
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{
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var plugin = _plugins[i];
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if (plugin.Manifest.Status == PluginStatus.Deleted && DeletePlugin(plugin))
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{
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// See if there is another version, and if so make that active.
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ProcessAlternative(plugin);
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}
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}
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// Now load the assemblies..
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foreach (var plugin in _plugins)
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{
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UpdatePluginSuperceedStatus(plugin);
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if (plugin.IsEnabledAndSupported == false)
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{
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_logger.LogInformation("Skipping disabled plugin {Version} of {Name} ", plugin.Version, plugin.Name);
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continue;
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}
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var assemblyLoadContext = new PluginLoadContext(plugin.Path);
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_assemblyLoadContexts.Add(assemblyLoadContext);
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var assemblies = new List<Assembly>(plugin.DllFiles.Count);
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var loadedAll = true;
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foreach (var file in plugin.DllFiles)
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{
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try
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{
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assemblies.Add(assemblyLoadContext.LoadFromAssemblyPath(file));
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}
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catch (FileLoadException ex)
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{
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_logger.LogError(ex, "Failed to load assembly {Path}. Disabling plugin", file);
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ChangePluginState(plugin, PluginStatus.Malfunctioned);
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loadedAll = false;
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break;
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}
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#pragma warning disable CA1031 // Do not catch general exception types
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catch (Exception ex)
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#pragma warning restore CA1031 // Do not catch general exception types
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{
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_logger.LogError(ex, "Failed to load assembly {Path}. Unknown exception was thrown. Disabling plugin", file);
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ChangePluginState(plugin, PluginStatus.Malfunctioned);
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loadedAll = false;
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break;
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}
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}
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if (!loadedAll)
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{
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continue;
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}
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foreach (var assembly in assemblies)
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{
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try
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{
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// Load all required types to verify that the plugin will load
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assembly.GetTypes();
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}
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catch (SystemException ex) when (ex is TypeLoadException or ReflectionTypeLoadException) // Undocumented exception
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{
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_logger.LogError(ex, "Failed to load assembly {Path}. This error occurs when a plugin references an incompatible version of one of the shared libraries. Disabling plugin", assembly.Location);
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ChangePluginState(plugin, PluginStatus.NotSupported);
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break;
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}
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#pragma warning disable CA1031 // Do not catch general exception types
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catch (Exception ex)
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#pragma warning restore CA1031 // Do not catch general exception types
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{
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_logger.LogError(ex, "Failed to load assembly {Path}. Unknown exception was thrown. Disabling plugin", assembly.Location);
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ChangePluginState(plugin, PluginStatus.Malfunctioned);
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break;
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}
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_logger.LogInformation("Loaded assembly {Assembly} from {Path}", assembly.FullName, assembly.Location);
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yield return assembly;
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}
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}
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}
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/// <summary>
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/// Creates all the plugin instances.
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/// </summary>
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public void CreatePlugins()
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{
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_ = _appHost.GetExports<IPlugin>(CreatePluginInstance);
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}
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/// <summary>
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/// Registers the plugin's services with the DI.
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/// Note: DI is not yet instantiated yet.
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/// </summary>
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/// <param name="serviceCollection">A <see cref="ServiceCollection"/> instance.</param>
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public void RegisterServices(IServiceCollection serviceCollection)
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{
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foreach (var pluginServiceRegistrator in _appHost.GetExportTypes<IPluginServiceRegistrator>())
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{
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var plugin = GetPluginByAssembly(pluginServiceRegistrator.Assembly);
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if (plugin is null)
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{
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_logger.LogError("Unable to find plugin in assembly {Assembly}", pluginServiceRegistrator.Assembly.FullName);
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continue;
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}
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UpdatePluginSuperceedStatus(plugin);
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if (!plugin.IsEnabledAndSupported)
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{
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continue;
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}
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try
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{
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var instance = (IPluginServiceRegistrator?)Activator.CreateInstance(pluginServiceRegistrator);
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instance?.RegisterServices(serviceCollection, _appHost);
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}
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#pragma warning disable CA1031 // Do not catch general exception types
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catch (Exception ex)
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#pragma warning restore CA1031 // Do not catch general exception types
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{
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_logger.LogError(ex, "Error registering plugin services from {Assembly}.", pluginServiceRegistrator.Assembly.FullName);
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if (ChangePluginState(plugin, PluginStatus.Malfunctioned))
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{
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_logger.LogInformation("Disabling plugin {Path}", plugin.Path);
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}
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}
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}
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}
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/// <summary>
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/// Imports a plugin manifest from <paramref name="folder"/>.
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/// </summary>
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/// <param name="folder">Folder of the plugin.</param>
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public void ImportPluginFrom(string folder)
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{
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ArgumentException.ThrowIfNullOrEmpty(folder);
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// Load the plugin.
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var plugin = LoadManifest(folder);
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// Make sure we haven't already loaded this.
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if (_plugins.Any(p => p.Manifest.Equals(plugin.Manifest)))
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{
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return;
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}
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_plugins.Add(plugin);
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EnablePlugin(plugin);
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}
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/// <summary>
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/// Removes the plugin reference '<paramref name="plugin"/>.
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/// </summary>
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/// <param name="plugin">The plugin.</param>
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/// <returns>Outcome of the operation.</returns>
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public bool RemovePlugin(LocalPlugin plugin)
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{
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ArgumentNullException.ThrowIfNull(plugin);
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if (DeletePlugin(plugin))
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{
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ProcessAlternative(plugin);
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return true;
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}
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_logger.LogWarning("Unable to delete {Path}, so marking as deleteOnStartup.", plugin.Path);
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// Unable to delete, so disable.
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if (ChangePluginState(plugin, PluginStatus.Deleted))
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{
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ProcessAlternative(plugin);
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return true;
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}
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return false;
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}
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/// <summary>
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/// Attempts to find the plugin with and id of <paramref name="id"/>.
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/// </summary>
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/// <param name="id">The <see cref="Guid"/> of plugin.</param>
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/// <param name="version">Optional <see cref="Version"/> of the plugin to locate.</param>
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/// <returns>A <see cref="LocalPlugin"/> if located, or null if not.</returns>
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public LocalPlugin? GetPlugin(Guid id, Version? version = null)
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{
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LocalPlugin? plugin;
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if (version is null)
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{
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// If no version is given, return the current instance.
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var plugins = _plugins.Where(p => p.Id.Equals(id)).ToList();
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plugin = plugins.FirstOrDefault(p => p.Instance is not null) ?? plugins.MaxBy(p => p.Version);
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}
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else
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{
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// Match id and version number.
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plugin = _plugins.FirstOrDefault(p => p.Id.Equals(id) && p.Version.Equals(version));
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}
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return plugin;
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}
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/// <summary>
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/// Enables the plugin, disabling all other versions.
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/// </summary>
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/// <param name="plugin">The <see cref="LocalPlugin"/> of the plug to disable.</param>
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public void EnablePlugin(LocalPlugin plugin)
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{
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ArgumentNullException.ThrowIfNull(plugin);
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if (ChangePluginState(plugin, PluginStatus.Active))
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{
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// See if there is another version, and if so, supercede it.
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ProcessAlternative(plugin);
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}
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}
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/// <summary>
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/// Disable the plugin.
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/// </summary>
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/// <param name="plugin">The <see cref="LocalPlugin"/> of the plug to disable.</param>
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public void DisablePlugin(LocalPlugin plugin)
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{
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ArgumentNullException.ThrowIfNull(plugin);
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// Update the manifest on disk
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if (ChangePluginState(plugin, PluginStatus.Disabled))
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{
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// If there is another version, activate it.
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ProcessAlternative(plugin);
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}
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}
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/// <summary>
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/// Disable the plugin.
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/// </summary>
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/// <param name="assembly">The <see cref="Assembly"/> of the plug to disable.</param>
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public void FailPlugin(Assembly assembly)
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{
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// Only save if disabled.
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ArgumentNullException.ThrowIfNull(assembly);
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var plugin = _plugins.FirstOrDefault(p => p.DllFiles.Contains(assembly.Location));
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if (plugin is null)
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{
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// A plugin's assembly didn't cause this issue, so ignore it.
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return;
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}
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ChangePluginState(plugin, PluginStatus.Malfunctioned);
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}
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/// <inheritdoc/>
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public bool SaveManifest(PluginManifest manifest, string path)
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{
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try
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{
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var data = JsonSerializer.Serialize(manifest, _jsonOptions);
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File.WriteAllText(Path.Combine(path, MetafileName), data);
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return true;
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}
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catch (ArgumentException e)
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{
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_logger.LogWarning(e, "Unable to save plugin manifest due to invalid value. {Path}", path);
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return false;
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}
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}
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/// <inheritdoc/>
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public async Task<bool> PopulateManifest(PackageInfo packageInfo, Version version, string path, PluginStatus status)
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{
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var versionInfo = packageInfo.Versions.First(v => v.Version == version.ToString());
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var imagePath = string.Empty;
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if (!string.IsNullOrEmpty(packageInfo.ImageUrl))
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{
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var url = new Uri(packageInfo.ImageUrl);
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imagePath = Path.Join(path, url.Segments[^1]);
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var fileStream = AsyncFile.OpenWrite(imagePath);
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Stream? downloadStream = null;
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try
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{
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downloadStream = await HttpClientFactory
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.CreateClient(NamedClient.Default)
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.GetStreamAsync(url)
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.ConfigureAwait(false);
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await downloadStream.CopyToAsync(fileStream).ConfigureAwait(false);
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}
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catch (HttpRequestException ex)
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{
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_logger.LogError(ex, "Failed to download image to path {Path} on disk.", imagePath);
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imagePath = string.Empty;
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}
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finally
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{
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await fileStream.DisposeAsync().ConfigureAwait(false);
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if (downloadStream is not null)
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{
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await downloadStream.DisposeAsync().ConfigureAwait(false);
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}
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}
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}
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var manifest = new PluginManifest
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{
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Category = packageInfo.Category,
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Changelog = versionInfo.Changelog ?? string.Empty,
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Description = packageInfo.Description,
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Id = packageInfo.Id,
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Name = packageInfo.Name,
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Overview = packageInfo.Overview,
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Owner = packageInfo.Owner,
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TargetAbi = versionInfo.TargetAbi ?? string.Empty,
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Timestamp = string.IsNullOrEmpty(versionInfo.Timestamp) ? DateTime.MinValue : DateTime.Parse(versionInfo.Timestamp, CultureInfo.InvariantCulture),
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Version = versionInfo.Version,
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Status = status == PluginStatus.Disabled ? PluginStatus.Disabled : PluginStatus.Active, // Keep disabled state.
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AutoUpdate = true,
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ImagePath = imagePath
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};
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if (!await ReconcileManifest(manifest, path).ConfigureAwait(false))
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{
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// An error occurred during reconciliation and saving could be undesirable.
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return false;
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}
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return SaveManifest(manifest, path);
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}
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/// <inheritdoc />
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public void Dispose()
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{
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foreach (var assemblyLoadContext in _assemblyLoadContexts)
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{
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assemblyLoadContext.Unload();
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}
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}
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/// <summary>
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/// Reconciles the manifest against any properties that exist locally in a pre-packaged meta.json found at the path.
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/// If no file is found, no reconciliation occurs.
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/// </summary>
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/// <param name="manifest">The <see cref="PluginManifest"/> to reconcile against.</param>
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/// <param name="path">The plugin path.</param>
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/// <returns>The reconciled <see cref="PluginManifest"/>.</returns>
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private async Task<bool> ReconcileManifest(PluginManifest manifest, string path)
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{
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try
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{
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var metafile = Path.Combine(path, MetafileName);
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if (!File.Exists(metafile))
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{
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_logger.LogInformation("No local manifest exists for plugin {Plugin}. Skipping manifest reconciliation.", manifest.Name);
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return true;
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}
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using var metaStream = File.OpenRead(metafile);
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var localManifest = await JsonSerializer.DeserializeAsync<PluginManifest>(metaStream, _jsonOptions).ConfigureAwait(false);
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localManifest ??= new PluginManifest();
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if (!Equals(localManifest.Id, manifest.Id))
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{
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_logger.LogError("The manifest ID {LocalUUID} did not match the package info ID {PackageUUID}.", localManifest.Id, manifest.Id);
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manifest.Status = PluginStatus.Malfunctioned;
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}
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if (localManifest.Version != manifest.Version)
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{
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// Package information provides the version and is the source of truth. Pre-packages meta.json is assumed to be a mistake in this regard.
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_logger.LogWarning("The version of the local manifest was {LocalVersion}, but {PackageVersion} was expected. The value will be replaced.", localManifest.Version, manifest.Version);
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}
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// Explicitly mapping properties instead of using reflection is preferred here.
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manifest.Category = string.IsNullOrEmpty(localManifest.Category) ? manifest.Category : localManifest.Category;
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manifest.AutoUpdate = localManifest.AutoUpdate; // Preserve whatever is local. Package info does not have this property.
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manifest.Changelog = string.IsNullOrEmpty(localManifest.Changelog) ? manifest.Changelog : localManifest.Changelog;
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manifest.Description = string.IsNullOrEmpty(localManifest.Description) ? manifest.Description : localManifest.Description;
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manifest.Name = string.IsNullOrEmpty(localManifest.Name) ? manifest.Name : localManifest.Name;
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manifest.Overview = string.IsNullOrEmpty(localManifest.Overview) ? manifest.Overview : localManifest.Overview;
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manifest.Owner = string.IsNullOrEmpty(localManifest.Owner) ? manifest.Owner : localManifest.Owner;
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manifest.TargetAbi = string.IsNullOrEmpty(localManifest.TargetAbi) ? manifest.TargetAbi : localManifest.TargetAbi;
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manifest.Timestamp = localManifest.Timestamp.Equals(default) ? manifest.Timestamp : localManifest.Timestamp;
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manifest.ImagePath = string.IsNullOrEmpty(localManifest.ImagePath) ? manifest.ImagePath : localManifest.ImagePath;
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manifest.Assemblies = localManifest.Assemblies;
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return true;
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}
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catch (Exception e)
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{
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_logger.LogWarning(e, "Unable to reconcile plugin manifest due to an error. {Path}", path);
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return false;
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}
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}
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/// <summary>
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/// Changes a plugin's load status.
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/// </summary>
|
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/// <param name="plugin">The <see cref="LocalPlugin"/> instance.</param>
|
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/// <param name="state">The <see cref="PluginStatus"/> of the plugin.</param>
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/// <returns>Success of the task.</returns>
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private bool ChangePluginState(LocalPlugin plugin, PluginStatus state)
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{
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if (plugin.Manifest.Status == state || string.IsNullOrEmpty(plugin.Path))
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{
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// No need to save as the state hasn't changed.
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return true;
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}
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plugin.Manifest.Status = state;
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return SaveManifest(plugin.Manifest, plugin.Path);
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}
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|
|
/// <summary>
|
|
/// Finds the plugin record using the assembly.
|
|
/// </summary>
|
|
/// <param name="assembly">The <see cref="Assembly"/> being sought.</param>
|
|
/// <returns>The matching record, or null if not found.</returns>
|
|
private LocalPlugin? GetPluginByAssembly(Assembly assembly)
|
|
{
|
|
// Find which plugin it is by the path.
|
|
return _plugins.FirstOrDefault(p => p.DllFiles.Contains(assembly.Location, StringComparer.Ordinal));
|
|
}
|
|
|
|
/// <summary>
|
|
/// Creates the instance safe.
|
|
/// </summary>
|
|
/// <param name="type">The type.</param>
|
|
/// <returns>System.Object.</returns>
|
|
private IPlugin? CreatePluginInstance(Type type)
|
|
{
|
|
// Find the record for this plugin.
|
|
var plugin = GetPluginByAssembly(type.Assembly);
|
|
if (plugin?.Manifest.Status < PluginStatus.Active)
|
|
{
|
|
return null;
|
|
}
|
|
|
|
try
|
|
{
|
|
_logger.LogDebug("Creating instance of {Type}", type);
|
|
// _appHost.ServiceProvider is already assigned when we create the plugins
|
|
var instance = (IPlugin)ActivatorUtilities.CreateInstance(_appHost.ServiceProvider!, type);
|
|
if (plugin is null)
|
|
{
|
|
// Create a dummy record for the providers.
|
|
// TODO: remove this code once all provided have been released as separate plugins.
|
|
plugin = new LocalPlugin(
|
|
instance.AssemblyFilePath,
|
|
true,
|
|
new PluginManifest
|
|
{
|
|
Id = instance.Id,
|
|
Status = PluginStatus.Active,
|
|
Name = instance.Name,
|
|
Version = instance.Version.ToString()
|
|
})
|
|
{
|
|
Instance = instance
|
|
};
|
|
|
|
_plugins.Add(plugin);
|
|
|
|
plugin.Manifest.Status = PluginStatus.Active;
|
|
}
|
|
else
|
|
{
|
|
plugin.Instance = instance;
|
|
var manifest = plugin.Manifest;
|
|
var pluginStr = instance.Version.ToString();
|
|
bool changed = false;
|
|
if (string.Equals(manifest.Version, pluginStr, StringComparison.Ordinal)
|
|
|| !manifest.Id.Equals(instance.Id))
|
|
{
|
|
// If a plugin without a manifest failed to load due to an external issue (eg config),
|
|
// this updates the manifest to the actual plugin values.
|
|
manifest.Version = pluginStr;
|
|
manifest.Name = plugin.Instance.Name;
|
|
manifest.Description = plugin.Instance.Description;
|
|
manifest.Id = plugin.Instance.Id;
|
|
changed = true;
|
|
}
|
|
|
|
changed = changed || manifest.Status != PluginStatus.Active;
|
|
manifest.Status = PluginStatus.Active;
|
|
|
|
if (changed)
|
|
{
|
|
SaveManifest(manifest, plugin.Path);
|
|
}
|
|
}
|
|
|
|
_logger.LogInformation("Loaded plugin: {PluginName} {PluginVersion}", plugin.Name, plugin.Version);
|
|
|
|
return instance;
|
|
}
|
|
#pragma warning disable CA1031 // Do not catch general exception types
|
|
catch (Exception ex)
|
|
#pragma warning restore CA1031 // Do not catch general exception types
|
|
{
|
|
_logger.LogError(ex, "Error creating {Type}", type.FullName);
|
|
if (plugin is not null)
|
|
{
|
|
if (ChangePluginState(plugin, PluginStatus.Malfunctioned))
|
|
{
|
|
_logger.LogInformation("Plugin {Path} has been disabled.", plugin.Path);
|
|
return null;
|
|
}
|
|
}
|
|
|
|
_logger.LogDebug("Unable to auto-disable.");
|
|
return null;
|
|
}
|
|
}
|
|
|
|
private void UpdatePluginSuperceedStatus(LocalPlugin plugin)
|
|
{
|
|
if (plugin.Manifest.Status != PluginStatus.Superceded)
|
|
{
|
|
return;
|
|
}
|
|
|
|
var predecessor = _plugins.OrderByDescending(p => p.Version)
|
|
.FirstOrDefault(p => p.Id.Equals(plugin.Id) && p.IsEnabledAndSupported && p.Version != plugin.Version);
|
|
if (predecessor is not null)
|
|
{
|
|
return;
|
|
}
|
|
|
|
plugin.Manifest.Status = PluginStatus.Active;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Attempts to delete a plugin.
|
|
/// </summary>
|
|
/// <param name="plugin">A <see cref="LocalPlugin"/> instance to delete.</param>
|
|
/// <returns>True if successful.</returns>
|
|
private bool DeletePlugin(LocalPlugin plugin)
|
|
{
|
|
// Attempt a cleanup of old folders.
|
|
try
|
|
{
|
|
Directory.Delete(plugin.Path, true);
|
|
_logger.LogDebug("Deleted {Path}", plugin.Path);
|
|
}
|
|
#pragma warning disable CA1031 // Do not catch general exception types
|
|
catch
|
|
#pragma warning restore CA1031 // Do not catch general exception types
|
|
{
|
|
return false;
|
|
}
|
|
|
|
return _plugins.Remove(plugin);
|
|
}
|
|
|
|
internal LocalPlugin LoadManifest(string dir)
|
|
{
|
|
Version? version;
|
|
PluginManifest? manifest = null;
|
|
var metafile = Path.Combine(dir, MetafileName);
|
|
if (File.Exists(metafile))
|
|
{
|
|
// Only path where this stays null is when File.ReadAllBytes throws an IOException
|
|
byte[] data = null!;
|
|
try
|
|
{
|
|
data = File.ReadAllBytes(metafile);
|
|
manifest = JsonSerializer.Deserialize<PluginManifest>(data, _jsonOptions);
|
|
}
|
|
catch (IOException ex)
|
|
{
|
|
_logger.LogError(ex, "Error reading file {Path}.", dir);
|
|
}
|
|
catch (JsonException ex)
|
|
{
|
|
_logger.LogError(ex, "Error deserializing {Json}.", Encoding.UTF8.GetString(data));
|
|
}
|
|
|
|
if (manifest is not null)
|
|
{
|
|
if (!Version.TryParse(manifest.TargetAbi, out var targetAbi))
|
|
{
|
|
targetAbi = _minimumVersion;
|
|
}
|
|
|
|
if (!Version.TryParse(manifest.Version, out version))
|
|
{
|
|
manifest.Version = _minimumVersion.ToString();
|
|
}
|
|
|
|
return new LocalPlugin(dir, _appVersion >= targetAbi, manifest);
|
|
}
|
|
}
|
|
|
|
// No metafile, so lets see if the folder is versioned.
|
|
// TODO: Phase this support out in future versions.
|
|
metafile = dir.Split(Path.DirectorySeparatorChar, StringSplitOptions.RemoveEmptyEntries)[^1];
|
|
int versionIndex = dir.LastIndexOf('_');
|
|
if (versionIndex != -1)
|
|
{
|
|
// Get the version number from the filename if possible.
|
|
metafile = Path.GetFileName(dir[..versionIndex]);
|
|
version = Version.TryParse(dir.AsSpan()[(versionIndex + 1)..], out Version? parsedVersion) ? parsedVersion : _appVersion;
|
|
}
|
|
else
|
|
{
|
|
// Un-versioned folder - Add it under the path name and version it suitable for this instance.
|
|
version = _appVersion;
|
|
}
|
|
|
|
// Auto-create a plugin manifest, so we can disable it, if it fails to load.
|
|
manifest = new PluginManifest
|
|
{
|
|
Status = PluginStatus.Active,
|
|
Name = metafile,
|
|
AutoUpdate = false,
|
|
Id = metafile.GetMD5(),
|
|
TargetAbi = _appVersion.ToString(),
|
|
Version = version.ToString()
|
|
};
|
|
|
|
return new LocalPlugin(dir, true, manifest);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets the list of local plugins.
|
|
/// </summary>
|
|
/// <returns>Enumerable of local plugins.</returns>
|
|
private IEnumerable<LocalPlugin> DiscoverPlugins()
|
|
{
|
|
var versions = new List<LocalPlugin>();
|
|
|
|
if (!Directory.Exists(_pluginsPath))
|
|
{
|
|
// Plugin path doesn't exist, don't try to enumerate sub-folders.
|
|
return Enumerable.Empty<LocalPlugin>();
|
|
}
|
|
|
|
var directories = Directory.EnumerateDirectories(_pluginsPath, "*.*", SearchOption.TopDirectoryOnly);
|
|
foreach (var dir in directories)
|
|
{
|
|
versions.Add(LoadManifest(dir));
|
|
}
|
|
|
|
string lastName = string.Empty;
|
|
versions.Sort(LocalPlugin.Compare);
|
|
// Traverse backwards through the list.
|
|
// The first item will be the latest version.
|
|
for (int x = versions.Count - 1; x >= 0; x--)
|
|
{
|
|
var entry = versions[x];
|
|
if (!string.Equals(lastName, entry.Name, StringComparison.OrdinalIgnoreCase))
|
|
{
|
|
if (!TryGetPluginDlls(entry, out var allowedDlls))
|
|
{
|
|
_logger.LogError("One or more assembly paths was invalid. Marking plugin {Plugin} as \"Malfunctioned\".", entry.Name);
|
|
ChangePluginState(entry, PluginStatus.Malfunctioned);
|
|
continue;
|
|
}
|
|
|
|
entry.DllFiles = allowedDlls;
|
|
|
|
if (entry.IsEnabledAndSupported)
|
|
{
|
|
lastName = entry.Name;
|
|
continue;
|
|
}
|
|
}
|
|
|
|
if (string.IsNullOrEmpty(lastName))
|
|
{
|
|
continue;
|
|
}
|
|
|
|
var cleaned = false;
|
|
var path = entry.Path;
|
|
if (_config.RemoveOldPlugins)
|
|
{
|
|
// Attempt a cleanup of old folders.
|
|
try
|
|
{
|
|
_logger.LogDebug("Deleting {Path}", path);
|
|
Directory.Delete(path, true);
|
|
cleaned = true;
|
|
}
|
|
#pragma warning disable CA1031 // Do not catch general exception types
|
|
catch (Exception e)
|
|
#pragma warning restore CA1031 // Do not catch general exception types
|
|
{
|
|
_logger.LogWarning(e, "Unable to delete {Path}", path);
|
|
}
|
|
|
|
if (cleaned)
|
|
{
|
|
versions.RemoveAt(x);
|
|
}
|
|
else
|
|
{
|
|
ChangePluginState(entry, PluginStatus.Deleted);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Only want plugin folders which have files.
|
|
return versions.Where(p => p.DllFiles.Count != 0);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Attempts to retrieve valid DLLs from the plugin path. This method will consider the assembly whitelist
|
|
/// from the manifest.
|
|
/// </summary>
|
|
/// <remarks>
|
|
/// Loading DLLs from externally supplied paths introduces a path traversal risk. This method
|
|
/// uses a safelisting tactic of considering DLLs from the plugin directory and only using
|
|
/// the plugin's canonicalized assembly whitelist for comparison. See
|
|
/// <see href="https://owasp.org/www-community/attacks/Path_Traversal"/> for more details.
|
|
/// </remarks>
|
|
/// <param name="plugin">The plugin.</param>
|
|
/// <param name="whitelistedDlls">The whitelisted DLLs. If the method returns <see langword="false"/>, this will be empty.</param>
|
|
/// <returns>
|
|
/// <see langword="true"/> if all assemblies listed in the manifest were available in the plugin directory.
|
|
/// <see langword="false"/> if any assemblies were invalid or missing from the plugin directory.
|
|
/// </returns>
|
|
/// <exception cref="ArgumentNullException">If the <see cref="LocalPlugin"/> is null.</exception>
|
|
private bool TryGetPluginDlls(LocalPlugin plugin, out IReadOnlyList<string> whitelistedDlls)
|
|
{
|
|
ArgumentNullException.ThrowIfNull(nameof(plugin));
|
|
|
|
IReadOnlyList<string> pluginDlls = Directory.GetFiles(plugin.Path, "*.dll", SearchOption.AllDirectories);
|
|
|
|
whitelistedDlls = Array.Empty<string>();
|
|
if (pluginDlls.Count > 0 && plugin.Manifest.Assemblies.Count > 0)
|
|
{
|
|
_logger.LogInformation("Registering whitelisted assemblies for plugin \"{Plugin}\"...", plugin.Name);
|
|
|
|
var canonicalizedPaths = new List<string>();
|
|
foreach (var path in plugin.Manifest.Assemblies)
|
|
{
|
|
var canonicalized = Path.Combine(plugin.Path, path).Canonicalize();
|
|
|
|
// Ensure we stay in the plugin directory.
|
|
if (!canonicalized.StartsWith(plugin.Path.NormalizePath(), StringComparison.Ordinal))
|
|
{
|
|
_logger.LogError("Assembly path {Path} is not inside the plugin directory.", path);
|
|
return false;
|
|
}
|
|
|
|
canonicalizedPaths.Add(canonicalized);
|
|
}
|
|
|
|
var intersected = pluginDlls.Intersect(canonicalizedPaths).ToList();
|
|
|
|
if (intersected.Count != canonicalizedPaths.Count)
|
|
{
|
|
_logger.LogError("Plugin {Plugin} contained assembly paths that were not found in the directory.", plugin.Name);
|
|
return false;
|
|
}
|
|
|
|
whitelistedDlls = intersected;
|
|
}
|
|
else
|
|
{
|
|
// No whitelist, default to loading all DLLs in plugin directory.
|
|
whitelistedDlls = pluginDlls;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Changes the status of the other versions of the plugin to "Superceded".
|
|
/// </summary>
|
|
/// <param name="plugin">The <see cref="LocalPlugin"/> that's master.</param>
|
|
private void ProcessAlternative(LocalPlugin plugin)
|
|
{
|
|
// Detect whether there is another version of this plugin that needs disabling.
|
|
var previousVersion = _plugins.OrderByDescending(p => p.Version)
|
|
.FirstOrDefault(
|
|
p => p.Id.Equals(plugin.Id)
|
|
&& p.IsEnabledAndSupported
|
|
&& p.Version != plugin.Version);
|
|
|
|
if (previousVersion is null)
|
|
{
|
|
// This value is memory only - so that the web will show restart required.
|
|
plugin.Manifest.Status = PluginStatus.Restart;
|
|
plugin.Manifest.AutoUpdate = false;
|
|
return;
|
|
}
|
|
|
|
if (plugin.Manifest.Status == PluginStatus.Active && !ChangePluginState(previousVersion, PluginStatus.Superceded))
|
|
{
|
|
_logger.LogError("Unable to enable version {Version} of {Name}", previousVersion.Version, previousVersion.Name);
|
|
}
|
|
else if (plugin.Manifest.Status == PluginStatus.Superceded && !ChangePluginState(previousVersion, PluginStatus.Active))
|
|
{
|
|
_logger.LogError("Unable to supercede version {Version} of {Name}", previousVersion.Version, previousVersion.Name);
|
|
}
|
|
|
|
// This value is memory only - so that the web will show restart required.
|
|
plugin.Manifest.Status = PluginStatus.Restart;
|
|
plugin.Manifest.AutoUpdate = false;
|
|
}
|
|
}
|
|
}
|