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			520 lines
		
	
	
		
			19 KiB
		
	
	
	
		
			C#
		
	
	
	
	
	
			
		
		
	
	
			520 lines
		
	
	
		
			19 KiB
		
	
	
	
		
			C#
		
	
	
	
	
	
#pragma warning disable CS1591
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using System;
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using System.Collections.Concurrent;
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using System.Collections.Generic;
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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.Runtime.Serialization;
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using System.Security.Cryptography;
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using System.Threading;
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using System.Threading.Tasks;
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using MediaBrowser.Common;
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using MediaBrowser.Common.Configuration;
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using MediaBrowser.Common.Net;
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using MediaBrowser.Common.Plugins;
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using MediaBrowser.Common.Updates;
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using MediaBrowser.Common.System;
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using MediaBrowser.Controller.Configuration;
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using MediaBrowser.Model.IO;
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using MediaBrowser.Model.Net;
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using MediaBrowser.Model.Serialization;
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using MediaBrowser.Model.Updates;
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using Microsoft.Extensions.Logging;
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using MediaBrowser.Model.System;
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namespace Emby.Server.Implementations.Updates
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{
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    /// <summary>
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    /// Manages all install, uninstall, and update operations for the system and individual plugins.
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    /// </summary>
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    public class InstallationManager : IInstallationManager
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    {
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        /// <summary>
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        /// The logger.
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        /// </summary>
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        private readonly ILogger<InstallationManager> _logger;
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        private readonly IApplicationPaths _appPaths;
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        private readonly IHttpClientFactory _httpClientFactory;
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        private readonly IJsonSerializer _jsonSerializer;
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        private readonly IServerConfigurationManager _config;
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        private readonly IFileSystem _fileSystem;
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        /// <summary>
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        /// Gets the application host.
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        /// </summary>
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        /// <value>The application host.</value>
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        private readonly IApplicationHost _applicationHost;
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        private readonly IZipClient _zipClient;
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        private readonly object _currentInstallationsLock = new object();
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        /// <summary>
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        /// The current installations.
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        /// </summary>
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        private readonly List<(InstallationInfo info, CancellationTokenSource token)> _currentInstallations;
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        /// <summary>
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        /// The completed installations.
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        /// </summary>
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        private readonly ConcurrentBag<InstallationInfo> _completedInstallationsInternal;
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        public InstallationManager(
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            ILogger<InstallationManager> logger,
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            IApplicationHost appHost,
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            IApplicationPaths appPaths,
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            IHttpClientFactory httpClientFactory,
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            IJsonSerializer jsonSerializer,
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            IServerConfigurationManager config,
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            IFileSystem fileSystem,
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            IZipClient zipClient)
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        {
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            if (logger == null)
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            {
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                throw new ArgumentNullException(nameof(logger));
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            }
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            _currentInstallations = new List<(InstallationInfo, CancellationTokenSource)>();
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            _completedInstallationsInternal = new ConcurrentBag<InstallationInfo>();
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            _logger = logger;
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            _applicationHost = appHost;
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            _appPaths = appPaths;
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            _httpClientFactory = httpClientFactory;
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            _jsonSerializer = jsonSerializer;
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            _config = config;
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            _fileSystem = fileSystem;
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            _zipClient = zipClient;
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        }
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        /// <inheritdoc />
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        public event EventHandler<InstallationInfo> PackageInstalling;
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        /// <inheritdoc />
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        public event EventHandler<InstallationInfo> PackageInstallationCompleted;
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        /// <inheritdoc />
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        public event EventHandler<InstallationFailedEventArgs> PackageInstallationFailed;
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        /// <inheritdoc />
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        public event EventHandler<InstallationInfo> PackageInstallationCancelled;
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        /// <inheritdoc />
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        public event EventHandler<IPlugin> PluginUninstalled;
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        /// <inheritdoc />
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        public event EventHandler<InstallationInfo> PluginUpdated;
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        /// <inheritdoc />
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        public event EventHandler<InstallationInfo> PluginInstalled;
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        /// <inheritdoc />
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        public IEnumerable<InstallationInfo> CompletedInstallations => _completedInstallationsInternal;
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        /// <inheritdoc />
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        public async Task<IReadOnlyList<PackageInfo>> GetPackages(string manifest, CancellationToken cancellationToken = default)
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        {
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            try
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            {
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                using var response = await _httpClientFactory.CreateClient(NamedClient.Default)
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                    .GetAsync(manifest, cancellationToken).ConfigureAwait(false);
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                await using var stream = await response.Content.ReadAsStreamAsync().ConfigureAwait(false);
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                try
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                {
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                    return await _jsonSerializer.DeserializeFromStreamAsync<IReadOnlyList<PackageInfo>>(stream).ConfigureAwait(false);
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                }
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                catch (SerializationException ex)
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                {
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                    _logger.LogError(ex, "Failed to deserialize the plugin manifest retrieved from {Manifest}", manifest);
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                    return Array.Empty<PackageInfo>();
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                }
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            }
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            catch (UriFormatException ex)
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            {
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                _logger.LogError(ex, "The URL configured for the plugin repository manifest URL is not valid: {Manifest}", manifest);
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                return Array.Empty<PackageInfo>();
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            }
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            catch (HttpException ex)
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            {
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                _logger.LogError(ex, "An error occurred while accessing the plugin manifest: {Manifest}", manifest);
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                return Array.Empty<PackageInfo>();
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            }
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            catch (HttpRequestException ex)
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            {
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                _logger.LogError(ex, "An error occurred while accessing the plugin manifest: {Manifest}", manifest);
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                return Array.Empty<PackageInfo>();
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            }
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        }
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        /// <inheritdoc />
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        public async Task<IReadOnlyList<PackageInfo>> GetAvailablePackages(CancellationToken cancellationToken = default)
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        {
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            var result = new List<PackageInfo>();
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            foreach (RepositoryInfo repository in _config.Configuration.PluginRepositories)
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            {
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                foreach (var package in await GetPackages(repository.Url, cancellationToken).ConfigureAwait(true))
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                {
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                    package.repositoryName = repository.Name;
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                    package.repositoryUrl = repository.Url;
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                    result.Add(package);
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                }
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            }
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            return result;
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        }
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        /// <inheritdoc />
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        public IEnumerable<PackageInfo> FilterPackages(
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            IEnumerable<PackageInfo> availablePackages,
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            string name = null,
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            Guid guid = default)
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        {
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            if (name != null)
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            {
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                availablePackages = availablePackages.Where(x => x.name.Equals(name, StringComparison.OrdinalIgnoreCase));
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            }
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            if (guid != Guid.Empty)
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            {
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                availablePackages = availablePackages.Where(x => Guid.Parse(x.guid) == guid);
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            }
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            return availablePackages;
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        }
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        /// <inheritdoc />
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        public IEnumerable<InstallationInfo> GetCompatibleVersions(
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            IEnumerable<PackageInfo> availablePackages,
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            string name = null,
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            Guid guid = default,
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            Version minVersion = null,
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            Version specificVersion = null)
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        {
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            var package = FilterPackages(availablePackages, name, guid).FirstOrDefault();
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            // Package not found in repository
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            if (package == null)
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            {
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                yield break;
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            }
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            var appVer = _applicationHost.ApplicationVersion;
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            var availableVersions = package.versions
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                .Where(x => Version.Parse(x.targetAbi) <= appVer);
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            if (specificVersion != null)
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            {
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                availableVersions = availableVersions.Where(x => new Version(x.version) == specificVersion);
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            }
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            else if (minVersion != null)
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            {
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                availableVersions = availableVersions.Where(x => new Version(x.version) >= minVersion);
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            }
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            foreach (var v in availableVersions.OrderByDescending(x => x.version))
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            {
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                yield return new InstallationInfo
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                {
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                    Changelog = v.changelog,
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                    Guid = new Guid(package.guid),
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                    Name = package.name,
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                    Version = new Version(v.version),
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                    SourceUrl = v.sourceUrl,
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                    Checksum = v.checksum
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                };
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            }
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        }
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        /// <inheritdoc />
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        public async Task<IEnumerable<InstallationInfo>> GetAvailablePluginUpdates(CancellationToken cancellationToken = default)
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        {
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            var catalog = await GetAvailablePackages(cancellationToken).ConfigureAwait(false);
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            return GetAvailablePluginUpdates(catalog);
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        }
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        private IEnumerable<InstallationInfo> GetAvailablePluginUpdates(IReadOnlyList<PackageInfo> pluginCatalog)
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        {
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            foreach (var plugin in _applicationHost.Plugins)
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            {
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                var compatibleVersions = GetCompatibleVersions(pluginCatalog, plugin.Name, plugin.Id, minVersion: plugin.Version);
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                var version = compatibleVersions.FirstOrDefault(y => y.Version > plugin.Version);
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                if (version != null && CompletedInstallations.All(x => x.Guid != version.Guid))
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                {
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                    yield return version;
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                }
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            }
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        }
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        /// <inheritdoc />
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        public async Task InstallPackage(InstallationInfo package, CancellationToken cancellationToken)
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        {
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            if (package == null)
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            {
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                throw new ArgumentNullException(nameof(package));
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            }
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            var innerCancellationTokenSource = new CancellationTokenSource();
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            var tuple = (package, innerCancellationTokenSource);
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            // Add it to the in-progress list
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            lock (_currentInstallationsLock)
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            {
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                _currentInstallations.Add(tuple);
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            }
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            var linkedToken = CancellationTokenSource.CreateLinkedTokenSource(cancellationToken, innerCancellationTokenSource.Token).Token;
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            PackageInstalling?.Invoke(this, package);
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            try
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            {
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                await InstallPackageInternal(package, linkedToken).ConfigureAwait(false);
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                lock (_currentInstallationsLock)
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                {
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                    _currentInstallations.Remove(tuple);
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                }
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                _completedInstallationsInternal.Add(package);
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                PackageInstallationCompleted?.Invoke(this, package);
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            }
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            catch (OperationCanceledException)
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            {
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                lock (_currentInstallationsLock)
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                {
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                    _currentInstallations.Remove(tuple);
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                }
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                _logger.LogInformation("Package installation cancelled: {0} {1}", package.Name, package.Version);
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                PackageInstallationCancelled?.Invoke(this, package);
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                throw;
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            }
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            catch (Exception ex)
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            {
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                _logger.LogError(ex, "Package installation failed");
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                lock (_currentInstallationsLock)
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                {
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                    _currentInstallations.Remove(tuple);
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                }
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                PackageInstallationFailed?.Invoke(this, new InstallationFailedEventArgs
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                {
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                    InstallationInfo = package,
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                    Exception = ex
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                });
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                throw;
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            }
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            finally
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            {
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                // Dispose the progress object and remove the installation from the in-progress list
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                tuple.innerCancellationTokenSource.Dispose();
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            }
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        }
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        /// <summary>
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        /// Installs the package internal.
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        /// </summary>
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        /// <param name="package">The package.</param>
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        /// <param name="cancellationToken">The cancellation token.</param>
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        /// <returns><see cref="Task" />.</returns>
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        private async Task InstallPackageInternal(InstallationInfo package, CancellationToken cancellationToken)
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        {
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            // Set last update time if we were installed before
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            IPlugin plugin = _applicationHost.Plugins.FirstOrDefault(p => p.Id == package.Guid)
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                           ?? _applicationHost.Plugins.FirstOrDefault(p => p.Name.Equals(package.Name, StringComparison.OrdinalIgnoreCase));
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            // Do the install
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            await PerformPackageInstallation(package, cancellationToken).ConfigureAwait(false);
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            // Do plugin-specific processing
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            if (plugin == null)
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            {
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                _logger.LogInformation("New plugin installed: {0} {1}", package.Name, package.Version);
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                PluginInstalled?.Invoke(this, package);
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            }
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            else
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            {
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                _logger.LogInformation("Plugin updated: {0} {1}", package.Name, package.Version);
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                PluginUpdated?.Invoke(this, package);
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            }
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            _applicationHost.NotifyPendingRestart();
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        }
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        private async Task PerformPackageInstallation(InstallationInfo package, CancellationToken cancellationToken)
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        {
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            var extension = Path.GetExtension(package.SourceUrl);
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            if (!string.Equals(extension, ".zip", StringComparison.OrdinalIgnoreCase))
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            {
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                _logger.LogError("Only zip packages are supported. {SourceUrl} is not a zip archive.", package.SourceUrl);
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                return;
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            }
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            // Always override the passed-in target (which is a file) and figure it out again
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            string targetDir = Path.Combine(_appPaths.PluginsPath, package.Name);
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            using var response = await _httpClientFactory.CreateClient(NamedClient.Default)
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                .GetAsync(package.SourceUrl, cancellationToken).ConfigureAwait(false);
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            await using var stream = await response.Content.ReadAsStreamAsync().ConfigureAwait(false);
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            // CA5351: Do Not Use Broken Cryptographic Algorithms
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#pragma warning disable CA5351
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            using var md5 = MD5.Create();
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            cancellationToken.ThrowIfCancellationRequested();
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            var hash = Hex.Encode(md5.ComputeHash(stream));
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            if (!string.Equals(package.Checksum, hash, StringComparison.OrdinalIgnoreCase))
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            {
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                _logger.LogError(
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                    "The checksums didn't match while installing {Package}, expected: {Expected}, got: {Received}",
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                    package.Name,
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                    package.Checksum,
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                    hash);
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                throw new InvalidDataException("The checksum of the received data doesn't match.");
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            }
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            // Version folder as they cannot be overwritten in Windows.
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            targetDir += "_" + package.Version;
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            if (Directory.Exists(targetDir))
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            {
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                try
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                {
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                    Directory.Delete(targetDir, true);
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                }
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                catch
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                {
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                    // Ignore any exceptions.
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                }
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            }
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            stream.Position = 0;
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            _zipClient.ExtractAllFromZip(stream, targetDir, true);
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#pragma warning restore CA5351
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        }
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        /// <summary>
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        /// Uninstalls a plugin.
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        /// </summary>
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        /// <param name="plugin">The plugin.</param>
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        public void UninstallPlugin(IPlugin plugin)
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        {
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            if (!plugin.CanUninstall)
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            {
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                _logger.LogWarning("Attempt to delete non removable plugin {0}, ignoring request", plugin.Name);
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                return;
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            }
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            plugin.OnUninstalling();
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            // Remove it the quick way for now
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            _applicationHost.RemovePlugin(plugin);
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            var path = plugin.AssemblyFilePath;
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            bool isDirectory = false;
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            // Check if we have a plugin directory we should remove too
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						|
            if (Path.GetDirectoryName(plugin.AssemblyFilePath) != _appPaths.PluginsPath)
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            {
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                path = Path.GetDirectoryName(plugin.AssemblyFilePath);
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                isDirectory = true;
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            }
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            // Make this case-insensitive to account for possible incorrect assembly naming
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            var file = _fileSystem.GetFilePaths(Path.GetDirectoryName(path))
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                .FirstOrDefault(i => string.Equals(i, path, StringComparison.OrdinalIgnoreCase));
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            if (!string.IsNullOrWhiteSpace(file))
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            {
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                path = file;
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            }
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            try
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            {
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                if (isDirectory)
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                {
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                    _logger.LogInformation("Deleting plugin directory {0}", path);
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                    Directory.Delete(path, true);
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                }
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                else
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                {
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                    _logger.LogInformation("Deleting plugin file {0}", path);
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                    _fileSystem.DeleteFile(path);
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                }
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            }
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            catch
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            {
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                // Ignore file errors.
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            }
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            var list = _config.Configuration.UninstalledPlugins.ToList();
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            var filename = Path.GetFileName(path);
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						|
            if (!list.Contains(filename, StringComparer.OrdinalIgnoreCase))
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            {
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                list.Add(filename);
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                _config.Configuration.UninstalledPlugins = list.ToArray();
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                _config.SaveConfiguration();
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            }
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						|
            PluginUninstalled?.Invoke(this, plugin);
 | 
						|
 | 
						|
            _applicationHost.NotifyPendingRestart();
 | 
						|
        }
 | 
						|
 | 
						|
        /// <inheritdoc/>
 | 
						|
        public bool CancelInstallation(Guid id)
 | 
						|
        {
 | 
						|
            lock (_currentInstallationsLock)
 | 
						|
            {
 | 
						|
                var install = _currentInstallations.Find(x => x.info.Guid == id);
 | 
						|
                if (install == default((InstallationInfo, CancellationTokenSource)))
 | 
						|
                {
 | 
						|
                    return false;
 | 
						|
                }
 | 
						|
 | 
						|
                install.token.Cancel();
 | 
						|
                _currentInstallations.Remove(install);
 | 
						|
                return true;
 | 
						|
            }
 | 
						|
        }
 | 
						|
 | 
						|
        /// <inheritdoc />
 | 
						|
        public void Dispose()
 | 
						|
        {
 | 
						|
            Dispose(true);
 | 
						|
            GC.SuppressFinalize(this);
 | 
						|
        }
 | 
						|
 | 
						|
        /// <summary>
 | 
						|
        /// Releases unmanaged and optionally managed resources.
 | 
						|
        /// </summary>
 | 
						|
        /// <param name="dispose"><c>true</c> to release both managed and unmanaged resources or <c>false</c> to release only unmanaged resources.</param>
 | 
						|
        protected virtual void Dispose(bool dispose)
 | 
						|
        {
 | 
						|
            if (dispose)
 | 
						|
            {
 | 
						|
                lock (_currentInstallationsLock)
 | 
						|
                {
 | 
						|
                    foreach (var tuple in _currentInstallations)
 | 
						|
                    {
 | 
						|
                        tuple.token.Dispose();
 | 
						|
                    }
 | 
						|
 | 
						|
                    _currentInstallations.Clear();
 | 
						|
                }
 | 
						|
            }
 | 
						|
        }
 | 
						|
    }
 | 
						|
}
 |