Add Server-Side Download Queue (#21)
* test add queueing to file service * further adjustments to download queueing * add check for whether the request is still in the queue to CheckQueue * forcefully release slot if download didn't finish in 15s * actually cancel the delay task * add metrics and refactor some of the request queue service * refactor pathing * reuse httpclient * add queue request dto to requestfile, enqueue users immediately if a slot is available * change startup to include all controllers * update server pathing * update pathing, again * several adjustments to auth, banning, jwt server tokens, renaming, authorization * update api I guess * adjust automated banning of charaident and reg * generate jwt on servers for internal authentication * remove mvcextensions Co-authored-by: rootdarkarchon <root.darkarchon@outlook.com>
This commit is contained in:
rootdarkarchon
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using ByteSizeLib;
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using MareSynchronosShared.Data;
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using MareSynchronosShared.Metrics;
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using MareSynchronosShared.Models;
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using MareSynchronosShared.Services;
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using MareSynchronosStaticFilesServer.Utils;
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using Microsoft.EntityFrameworkCore;
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namespace MareSynchronosStaticFilesServer.Services;
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public class FileCleanupService : IHostedService
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{
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private readonly MareMetrics _metrics;
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private readonly ILogger<FileCleanupService> _logger;
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private readonly IServiceProvider _services;
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private readonly IConfigurationService<StaticFilesServerConfiguration> _configuration;
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private readonly bool _isMainServer;
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private readonly string _cacheDir;
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private CancellationTokenSource _cleanupCts;
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public FileCleanupService(MareMetrics metrics, ILogger<FileCleanupService> logger, IServiceProvider services, IConfigurationService<StaticFilesServerConfiguration> configuration)
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{
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_metrics = metrics;
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_logger = logger;
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_services = services;
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_configuration = configuration;
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_isMainServer = configuration.IsMain;
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_cacheDir = _configuration.GetValue<string>(nameof(StaticFilesServerConfiguration.CacheDirectory));
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}
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public Task StartAsync(CancellationToken cancellationToken)
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{
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_logger.LogInformation("Cleanup Service started");
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_cleanupCts = new();
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_ = CleanUpTask(_cleanupCts.Token);
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return Task.CompletedTask;
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}
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public async Task CleanUpTask(CancellationToken ct)
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{
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_logger.LogInformation("Starting periodic cleanup task");
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while (!ct.IsCancellationRequested)
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{
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DirectoryInfo dir = new(_cacheDir);
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var allFiles = dir.GetFiles("*", SearchOption.AllDirectories);
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_metrics.SetGaugeTo(MetricsAPI.GaugeFilesTotalSize, allFiles.Sum(f => f.Length));
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_metrics.SetGaugeTo(MetricsAPI.GaugeFilesTotal, allFiles.Length);
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using var scope = _services.CreateScope();
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using var dbContext = scope.ServiceProvider.GetService<MareDbContext>()!;
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await CleanUpOutdatedFiles(dbContext, ct).ConfigureAwait(false);
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CleanUpFilesBeyondSizeLimit(dbContext, ct);
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if (_isMainServer)
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{
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await dbContext.SaveChangesAsync(ct).ConfigureAwait(false);
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}
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var now = DateTime.Now;
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TimeOnly currentTime = new(now.Hour, now.Minute, now.Second);
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TimeOnly futureTime = new(now.Hour, now.Minute - now.Minute % 10, 0);
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var span = futureTime.AddMinutes(10) - currentTime;
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_logger.LogInformation("File Cleanup Complete, next run at {date}", now.Add(span));
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await Task.Delay(span, ct).ConfigureAwait(false);
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}
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}
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private void CleanUpFilesBeyondSizeLimit(MareDbContext dbContext, CancellationToken ct)
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{
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var sizeLimit = _configuration.GetValueOrDefault<double>(nameof(StaticFilesServerConfiguration.CacheSizeHardLimitInGiB), -1);
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if (sizeLimit <= 0)
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{
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return;
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}
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try
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{
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_logger.LogInformation("Cleaning up files beyond the cache size limit of {cacheSizeLimit} GiB", sizeLimit);
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var allLocalFiles = Directory.EnumerateFiles(_cacheDir, "*", SearchOption.AllDirectories)
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.Select(f => new FileInfo(f)).ToList()
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.OrderBy(f => f.LastAccessTimeUtc).ToList();
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var totalCacheSizeInBytes = allLocalFiles.Sum(s => s.Length);
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long cacheSizeLimitInBytes = (long)ByteSize.FromGibiBytes(sizeLimit).Bytes;
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while (totalCacheSizeInBytes > cacheSizeLimitInBytes && allLocalFiles.Any() && !ct.IsCancellationRequested)
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{
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var oldestFile = allLocalFiles[0];
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allLocalFiles.Remove(oldestFile);
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totalCacheSizeInBytes -= oldestFile.Length;
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_metrics.DecGauge(MetricsAPI.GaugeFilesTotalSize, oldestFile.Length);
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_metrics.DecGauge(MetricsAPI.GaugeFilesTotal);
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_logger.LogInformation("Deleting {oldestFile} with size {size}MiB", oldestFile.FullName, ByteSize.FromBytes(oldestFile.Length).MebiBytes);
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oldestFile.Delete();
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if (_isMainServer)
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{
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FileCache f = new() { Hash = oldestFile.Name.ToUpperInvariant() };
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dbContext.Entry(f).State = EntityState.Deleted;
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}
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}
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}
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catch (Exception ex)
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{
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_logger.LogWarning(ex, "Error during cache size limit cleanup");
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}
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}
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private async Task CleanUpOutdatedFiles(MareDbContext dbContext, CancellationToken ct)
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{
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try
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{
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var unusedRetention = _configuration.GetValueOrDefault(nameof(StaticFilesServerConfiguration.UnusedFileRetentionPeriodInDays), 14);
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var forcedDeletionAfterHours = _configuration.GetValueOrDefault(nameof(StaticFilesServerConfiguration.ForcedDeletionOfFilesAfterHours), -1);
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_logger.LogInformation("Cleaning up files older than {filesOlderThanDays} days", unusedRetention);
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if (forcedDeletionAfterHours > 0)
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{
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_logger.LogInformation("Cleaning up files written to longer than {hours}h ago", forcedDeletionAfterHours);
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}
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// clean up files in DB but not on disk or last access is expired
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var prevTime = DateTime.Now.Subtract(TimeSpan.FromDays(unusedRetention));
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var prevTimeForcedDeletion = DateTime.Now.Subtract(TimeSpan.FromHours(forcedDeletionAfterHours));
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var allFiles = await dbContext.Files.ToListAsync().ConfigureAwait(false);
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int fileCounter = 0;
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foreach (var fileCache in allFiles.Where(f => f.Uploaded))
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{
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var file = FilePathUtil.GetFileInfoForHash(_cacheDir, fileCache.Hash);
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bool fileDeleted = false;
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if (file == null && _isMainServer)
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{
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_logger.LogInformation("File does not exist anymore: {fileName}", fileCache.Hash);
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dbContext.Files.Remove(fileCache);
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fileDeleted = true;
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}
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else if (file != null && file.LastAccessTime < prevTime)
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{
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_metrics.DecGauge(MetricsAPI.GaugeFilesTotalSize, file.Length);
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_metrics.DecGauge(MetricsAPI.GaugeFilesTotal);
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_logger.LogInformation("File outdated: {fileName}, {fileSize}MiB", file.Name, ByteSize.FromBytes(file.Length).MebiBytes);
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file.Delete();
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if (_isMainServer)
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{
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fileDeleted = true;
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dbContext.Files.Remove(fileCache);
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}
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}
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else if (file != null && forcedDeletionAfterHours > 0 && file.LastWriteTime < prevTimeForcedDeletion)
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{
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_metrics.DecGauge(MetricsAPI.GaugeFilesTotalSize, file.Length);
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_metrics.DecGauge(MetricsAPI.GaugeFilesTotal);
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_logger.LogInformation("File forcefully deleted: {fileName}, {fileSize}MiB", file.Name, ByteSize.FromBytes(file.Length).MebiBytes);
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file.Delete();
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if (_isMainServer)
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{
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fileDeleted = true;
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dbContext.Files.Remove(fileCache);
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}
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}
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if (_isMainServer && !fileDeleted && file != null && fileCache.Size == 0)
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{
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_logger.LogInformation("Setting File Size of " + fileCache.Hash + " to " + file.Length);
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fileCache.Size = file.Length;
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// commit every 1000 files to db
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if (fileCounter % 1000 == 0) await dbContext.SaveChangesAsync().ConfigureAwait(false);
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}
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fileCounter++;
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ct.ThrowIfCancellationRequested();
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}
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// clean up files that are on disk but not in DB for some reason
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CleanUpOrphanedFiles(allFiles, ct);
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}
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catch (Exception ex)
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{
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_logger.LogWarning(ex, "Error during file cleanup of old files");
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}
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}
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private void CleanUpOrphanedFiles(List<FileCache> allFiles, CancellationToken ct)
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{
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if (_isMainServer)
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{
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var allFilesHashes = new HashSet<string>(allFiles.Select(a => a.Hash.ToUpperInvariant()), StringComparer.Ordinal);
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DirectoryInfo dir = new(_cacheDir);
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var allFilesInDir = dir.GetFiles("*", SearchOption.AllDirectories);
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foreach (var file in allFilesInDir)
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{
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if (!allFilesHashes.Contains(file.Name.ToUpperInvariant()))
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{
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_metrics.DecGauge(MetricsAPI.GaugeFilesTotalSize, file.Length);
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_metrics.DecGauge(MetricsAPI.GaugeFilesTotal);
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file.Delete();
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_logger.LogInformation("File not in DB, deleting: {fileName}", file.Name);
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}
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ct.ThrowIfCancellationRequested();
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}
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}
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}
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public Task StopAsync(CancellationToken cancellationToken)
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{
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_cleanupCts.Cancel();
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return Task.CompletedTask;
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}
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}
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