using MediaBrowser.Common.Configuration; using MediaBrowser.Common.IO; using MediaBrowser.Common.Net; using MediaBrowser.Model.IO; using MediaBrowser.Model.Logging; using MediaBrowser.Model.Net; using Mono.Unix.Native; using System; using System.Collections.Generic; using System.IO; using System.Linq; using System.Text; using System.Threading; using System.Threading.Tasks; namespace MediaBrowser.Server.Startup.Common.FFMpeg { public class FFMpegDownloader { private readonly IHttpClient _httpClient; private readonly IApplicationPaths _appPaths; private readonly ILogger _logger; private readonly IZipClient _zipClient; private readonly IFileSystem _fileSystem; private readonly NativeEnvironment _environment; private readonly string[] _fontUrls = { "https://github.com/MediaBrowser/MediaBrowser.Resources/raw/master/ffmpeg/ARIALUNI.7z" }; public FFMpegDownloader(ILogger logger, IApplicationPaths appPaths, IHttpClient httpClient, IZipClient zipClient, IFileSystem fileSystem, NativeEnvironment environment) { _logger = logger; _appPaths = appPaths; _httpClient = httpClient; _zipClient = zipClient; _fileSystem = fileSystem; _environment = environment; } public async Task GetFFMpegInfo(NativeEnvironment environment, StartupOptions options, IProgress progress) { var customffMpegPath = options.GetOption("-ffmpeg"); var customffProbePath = options.GetOption("-ffprobe"); if (!string.IsNullOrWhiteSpace(customffMpegPath) && !string.IsNullOrWhiteSpace(customffProbePath)) { return new FFMpegInfo { ProbePath = customffProbePath, EncoderPath = customffMpegPath, Version = "custom" }; } var downloadInfo = FFMpegDownloadInfo.GetInfo(environment); var version = downloadInfo.Version; if (string.Equals(version, "path", StringComparison.OrdinalIgnoreCase)) { return new FFMpegInfo { ProbePath = downloadInfo.FFProbeFilename, EncoderPath = downloadInfo.FFMpegFilename, Version = version }; } var rootEncoderPath = Path.Combine(_appPaths.ProgramDataPath, "ffmpeg"); var versionedDirectoryPath = Path.Combine(rootEncoderPath, version); var info = new FFMpegInfo { ProbePath = Path.Combine(versionedDirectoryPath, downloadInfo.FFProbeFilename), EncoderPath = Path.Combine(versionedDirectoryPath, downloadInfo.FFMpegFilename), Version = version }; Directory.CreateDirectory(versionedDirectoryPath); var excludeFromDeletions = new List { versionedDirectoryPath }; if (!File.Exists(info.ProbePath) || !File.Exists(info.EncoderPath)) { // ffmpeg not present. See if there's an older version we can start with var existingVersion = GetExistingVersion(info, rootEncoderPath); // No older version. Need to download and block until complete if (existingVersion == null) { await DownloadFFMpeg(downloadInfo, versionedDirectoryPath, progress).ConfigureAwait(false); } else { // Older version found. // Start with that. Download new version in the background. var newPath = versionedDirectoryPath; Task.Run(() => DownloadFFMpegInBackground(downloadInfo, newPath)); info = existingVersion; versionedDirectoryPath = Path.GetDirectoryName(info.EncoderPath); excludeFromDeletions.Add(versionedDirectoryPath); } } await DownloadFonts(versionedDirectoryPath).ConfigureAwait(false); DeleteOlderFolders(Path.GetDirectoryName(versionedDirectoryPath), excludeFromDeletions); return info; } private void DeleteOlderFolders(string path, IEnumerable excludeFolders) { var folders = Directory.GetDirectories(path) .Where(i => !excludeFolders.Contains(i, StringComparer.OrdinalIgnoreCase)) .ToList(); foreach (var folder in folders) { DeleteFolder(folder); } } private void DeleteFolder(string path) { try { _fileSystem.DeleteDirectory(path, true); } catch (Exception ex) { _logger.ErrorException("Error deleting {0}", ex, path); } } private FFMpegInfo GetExistingVersion(FFMpegInfo info, string rootEncoderPath) { var encoderFilename = Path.GetFileName(info.EncoderPath); var probeFilename = Path.GetFileName(info.ProbePath); foreach (var directory in Directory.EnumerateDirectories(rootEncoderPath, "*", SearchOption.TopDirectoryOnly) .ToList()) { var allFiles = Directory.EnumerateFiles(directory, "*", SearchOption.AllDirectories).ToList(); var encoder = allFiles.FirstOrDefault(i => string.Equals(Path.GetFileName(i), encoderFilename, StringComparison.OrdinalIgnoreCase)); var probe = allFiles.FirstOrDefault(i => string.Equals(Path.GetFileName(i), probeFilename, StringComparison.OrdinalIgnoreCase)); if (!string.IsNullOrWhiteSpace(encoder) && !string.IsNullOrWhiteSpace(probe)) { return new FFMpegInfo { EncoderPath = encoder, ProbePath = probe, Version = Path.GetFileName(Path.GetDirectoryName(probe)) }; } } return null; } private async void DownloadFFMpegInBackground(FFMpegDownloadInfo downloadinfo, string directory) { try { await DownloadFFMpeg(downloadinfo, directory, new Progress()).ConfigureAwait(false); } catch (Exception ex) { _logger.ErrorException("Error downloading ffmpeg", ex); } } private async Task DownloadFFMpeg(FFMpegDownloadInfo downloadinfo, string directory, IProgress progress) { foreach (var url in downloadinfo.DownloadUrls) { progress.Report(0); try { var tempFile = await _httpClient.GetTempFile(new HttpRequestOptions { Url = url, CancellationToken = CancellationToken.None, Progress = progress }).ConfigureAwait(false); ExtractFFMpeg(downloadinfo, tempFile, directory); return; } catch (Exception ex) { _logger.ErrorException("Error downloading {0}", ex, url); } } if (downloadinfo.DownloadUrls.Length == 0) { throw new ApplicationException("ffmpeg unvailable. Please install it and start the server with two command line arguments: -ffmpeg \"{PATH}\" and -ffprobe \"{PATH}\""); } else { throw new ApplicationException("Unable to download required components. Please try again later."); } } private void ExtractFFMpeg(FFMpegDownloadInfo downloadinfo, string tempFile, string targetFolder) { _logger.Info("Extracting ffmpeg from {0}", tempFile); var tempFolder = Path.Combine(_appPaths.TempDirectory, Guid.NewGuid().ToString()); Directory.CreateDirectory(tempFolder); try { ExtractArchive(downloadinfo, tempFile, tempFolder); var files = Directory.EnumerateFiles(tempFolder, "*", SearchOption.AllDirectories) .ToList(); foreach (var file in files.Where(i => { var filename = Path.GetFileName(i); return string.Equals(filename, downloadinfo.FFProbeFilename, StringComparison.OrdinalIgnoreCase) || string.Equals(filename, downloadinfo.FFMpegFilename, StringComparison.OrdinalIgnoreCase); })) { var targetFile = Path.Combine(targetFolder, Path.GetFileName(file)); File.Copy(file, targetFile, true); SetFilePermissions(targetFile); } } finally { DeleteFile(tempFile); } } private void SetFilePermissions(string path) { // Linux: File permission to 666, and user's execute bit if (_environment.OperatingSystem == OperatingSystem.Bsd || _environment.OperatingSystem == OperatingSystem.Linux || _environment.OperatingSystem == OperatingSystem.Osx) { _logger.Info("Syscall.chmod {0} FilePermissions.DEFFILEMODE | FilePermissions.S_IRWXU | FilePermissions.S_IXGRP | FilePermissions.S_IXOTH", path); Syscall.chmod(path, FilePermissions.DEFFILEMODE | FilePermissions.S_IRWXU | FilePermissions.S_IXGRP | FilePermissions.S_IXOTH); } } private void ExtractArchive(FFMpegDownloadInfo downloadinfo, string archivePath, string targetPath) { _logger.Info("Extracting {0} to {1}", archivePath, targetPath); if (string.Equals(downloadinfo.ArchiveType, "7z", StringComparison.OrdinalIgnoreCase)) { _zipClient.ExtractAllFrom7z(archivePath, targetPath, true); } else if (string.Equals(downloadinfo.ArchiveType, "gz", StringComparison.OrdinalIgnoreCase)) { _zipClient.ExtractAllFromTar(archivePath, targetPath, true); } } private void Extract7zArchive(string archivePath, string targetPath) { _logger.Info("Extracting {0} to {1}", archivePath, targetPath); _zipClient.ExtractAllFrom7z(archivePath, targetPath, true); } private void DeleteFile(string path) { try { _fileSystem.DeleteFile(path); } catch (IOException ex) { _logger.ErrorException("Error deleting temp file {0}", ex, path); } } /// /// Extracts the fonts. /// /// The target path. /// Task. private async Task DownloadFonts(string targetPath) { try { var fontsDirectory = Path.Combine(targetPath, "fonts"); Directory.CreateDirectory(fontsDirectory); const string fontFilename = "ARIALUNI.TTF"; var fontFile = Path.Combine(fontsDirectory, fontFilename); if (File.Exists(fontFile)) { await WriteFontConfigFile(fontsDirectory).ConfigureAwait(false); } else { // Kick this off, but no need to wait on it Task.Run(async () => { await DownloadFontFile(fontsDirectory, fontFilename, new Progress()).ConfigureAwait(false); await WriteFontConfigFile(fontsDirectory).ConfigureAwait(false); }); } } catch (HttpException ex) { // Don't let the server crash because of this _logger.ErrorException("Error downloading ffmpeg font files", ex); } catch (Exception ex) { // Don't let the server crash because of this _logger.ErrorException("Error writing ffmpeg font files", ex); } } /// /// Downloads the font file. /// /// The fonts directory. /// The font filename. /// Task. private async Task DownloadFontFile(string fontsDirectory, string fontFilename, IProgress progress) { var existingFile = Directory .EnumerateFiles(_appPaths.ProgramDataPath, fontFilename, SearchOption.AllDirectories) .FirstOrDefault(); if (existingFile != null) { try { File.Copy(existingFile, Path.Combine(fontsDirectory, fontFilename), true); return; } catch (IOException ex) { // Log this, but don't let it fail the operation _logger.ErrorException("Error copying file", ex); } } string tempFile = null; foreach (var url in _fontUrls) { progress.Report(0); try { tempFile = await _httpClient.GetTempFile(new HttpRequestOptions { Url = url, Progress = progress }).ConfigureAwait(false); break; } catch (Exception ex) { // The core can function without the font file, so handle this _logger.ErrorException("Failed to download ffmpeg font file from {0}", ex, url); } } if (string.IsNullOrEmpty(tempFile)) { return; } Extract7zArchive(tempFile, fontsDirectory); try { _fileSystem.DeleteFile(tempFile); } catch (IOException ex) { // Log this, but don't let it fail the operation _logger.ErrorException("Error deleting temp file {0}", ex, tempFile); } } /// /// Writes the font config file. /// /// The fonts directory. /// Task. private async Task WriteFontConfigFile(string fontsDirectory) { const string fontConfigFilename = "fonts.conf"; var fontConfigFile = Path.Combine(fontsDirectory, fontConfigFilename); if (!File.Exists(fontConfigFile)) { var contents = string.Format("{0}ArialArial Unicode MS", fontsDirectory); var bytes = Encoding.UTF8.GetBytes(contents); using (var fileStream = _fileSystem.GetFileStream(fontConfigFile, FileMode.Create, FileAccess.Write, FileShare.Read, true)) { await fileStream.WriteAsync(bytes, 0, bytes.Length); } } } } }