555 lines
20 KiB
C#
555 lines
20 KiB
C#
using System.Globalization;
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using FFMpegCore;
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using System.Security.Cryptography;
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using AngleSharp.Text;
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using Microsoft.EntityFrameworkCore;
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using Minio;
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using Minio.DataModel.Args;
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using NetVips;
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using NodaTime;
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using tusdotnet.Stores;
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namespace DysonNetwork.Sphere.Storage;
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public class FileService(
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AppDatabase db,
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IConfiguration configuration,
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TusDiskStore store,
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ILogger<FileService> logger,
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IServiceScopeFactory scopeFactory,
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ICacheService cache
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)
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{
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private const string CacheKeyPrefix = "file:";
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private static readonly TimeSpan CacheDuration = TimeSpan.FromMinutes(15);
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/// <summary>
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/// The api for getting file meta with cache,
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/// the best use case is for accessing the file data.
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///
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/// <b>This function won't load uploader's information, only keep minimal file meta</b>
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/// </summary>
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/// <param name="fileId">The id of the cloud file requested</param>
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/// <returns>The minimal file meta</returns>
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public async Task<CloudFile?> GetFileAsync(string fileId)
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{
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var cacheKey = $"{CacheKeyPrefix}{fileId}";
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var cachedFile = await cache.GetAsync<CloudFile>(cacheKey);
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if (cachedFile is not null)
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return cachedFile;
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var file = await db.Files
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.Include(f => f.Account)
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.Where(f => f.Id == fileId)
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.FirstOrDefaultAsync();
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if (file != null)
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await cache.SetAsync(cacheKey, file, CacheDuration);
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return file;
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}
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private static readonly string TempFilePrefix = "dyn-cloudfile";
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private static readonly string[] AnimatedImageTypes =
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["image/gif", "image/apng", "image/webp", "image/avif"];
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// The analysis file method no longer will remove the GPS EXIF data
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// It should be handled on the client side, and for some specific cases it should be keep
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public async Task<CloudFile> ProcessNewFileAsync(
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Account.Account account,
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string fileId,
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Stream stream,
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string fileName,
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string? contentType
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)
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{
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var result = new List<(string filePath, string suffix)>();
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var ogFilePath = Path.GetFullPath(Path.Join(configuration.GetValue<string>("Tus:StorePath"), fileId));
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var fileSize = stream.Length;
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var hash = await HashFileAsync(stream, fileSize: fileSize);
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contentType ??= !fileName.Contains('.') ? "application/octet-stream" : MimeTypes.GetMimeType(fileName);
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var file = new CloudFile
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{
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Id = fileId,
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Name = fileName,
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MimeType = contentType,
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Size = fileSize,
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Hash = hash,
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AccountId = account.Id
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};
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var existingFile = await db.Files.FirstOrDefaultAsync(f => f.Hash == hash);
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file.StorageId = existingFile is not null ? existingFile.StorageId : file.Id;
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if (existingFile is not null)
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{
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file.FileMeta = existingFile.FileMeta;
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file.HasCompression = existingFile.HasCompression;
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file.SensitiveMarks = existingFile.SensitiveMarks;
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db.Files.Add(file);
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await db.SaveChangesAsync();
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return file;
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}
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switch (contentType.Split('/')[0])
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{
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case "image":
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var blurhash =
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BlurHashSharp.SkiaSharp.BlurHashEncoder.Encode(xComponent: 3, yComponent: 3, filename: ogFilePath);
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// Rewind stream
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stream.Position = 0;
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// Use NetVips for the rest
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using (var vipsImage = NetVips.Image.NewFromStream(stream))
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{
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var width = vipsImage.Width;
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var height = vipsImage.Height;
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var format = vipsImage.Get("vips-loader") ?? "unknown";
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// Try to get orientation from exif data
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var orientation = 1;
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var meta = new Dictionary<string, object>
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{
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["blur"] = blurhash,
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["format"] = format,
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["width"] = width,
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["height"] = height,
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["orientation"] = orientation,
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};
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Dictionary<string, object> exif = [];
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foreach (var field in vipsImage.GetFields())
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{
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var value = vipsImage.Get(field);
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// Skip GPS-related EXIF fields to remove location data
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if (IsIgnoredField(field))
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continue;
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if (field.StartsWith("exif-")) exif[field.Replace("exif-", "")] = value;
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else meta[field] = value;
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if (field == "orientation") orientation = (int)value;
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}
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if (orientation is 6 or 8)
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(width, height) = (height, width);
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var aspectRatio = height != 0 ? (double)width / height : 0;
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meta["exif"] = exif;
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meta["ratio"] = aspectRatio;
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file.FileMeta = meta;
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}
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break;
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case "video":
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case "audio":
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try
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{
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var mediaInfo = await FFProbe.AnalyseAsync(ogFilePath);
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file.FileMeta = new Dictionary<string, object>
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{
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["duration"] = mediaInfo.Duration.TotalSeconds,
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["format_name"] = mediaInfo.Format.FormatName,
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["format_long_name"] = mediaInfo.Format.FormatLongName,
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["start_time"] = mediaInfo.Format.StartTime.ToString(),
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["bit_rate"] = mediaInfo.Format.BitRate.ToString(CultureInfo.InvariantCulture),
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["tags"] = mediaInfo.Format.Tags ?? [],
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["chapters"] = mediaInfo.Chapters,
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};
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if (mediaInfo.PrimaryVideoStream is not null)
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file.FileMeta["ratio"] = mediaInfo.PrimaryVideoStream.Width / mediaInfo.PrimaryVideoStream.Height;
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}
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catch (Exception ex)
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{
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logger.LogError("File analyzed failed, unable collect video / audio information: {Message}",
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ex.Message);
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}
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break;
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}
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db.Files.Add(file);
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await db.SaveChangesAsync();
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_ = Task.Run(async () =>
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{
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using var scope = scopeFactory.CreateScope();
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var nfs = scope.ServiceProvider.GetRequiredService<FileService>();
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try
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{
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logger.LogInformation("Processed file {fileId}, now trying optimizing if possible...", fileId);
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if (contentType.Split('/')[0] == "image")
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{
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// Skip compression for animated image types
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var animatedMimeTypes = AnimatedImageTypes;
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if (Enumerable.Contains(animatedMimeTypes, contentType))
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{
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logger.LogInformation(
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"File {fileId} is an animated image (MIME: {mime}), skipping WebP conversion.", fileId,
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contentType
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);
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var tempFilePath = Path.Join(Path.GetTempPath(), $"{TempFilePrefix}#{file.Id}");
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result.Add((tempFilePath, string.Empty));
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return;
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}
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file.MimeType = "image/webp";
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using var vipsImage = Image.NewFromFile(ogFilePath);
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var imagePath = Path.Join(Path.GetTempPath(), $"{TempFilePrefix}#{file.Id}");
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vipsImage.Autorot().WriteToFile(imagePath + ".webp",
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new VOption { { "lossless", true }, { "strip", true } });
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result.Add((imagePath + ".webp", string.Empty));
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if (vipsImage.Width * vipsImage.Height >= 1024 * 1024)
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{
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var scale = 1024.0 / Math.Max(vipsImage.Width, vipsImage.Height);
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var imageCompressedPath =
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Path.Join(Path.GetTempPath(), $"{TempFilePrefix}#{file.Id}-compressed");
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// Create and save image within the same synchronous block to avoid disposal issues
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using var compressedImage = vipsImage.Resize(scale);
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compressedImage.Autorot().WriteToFile(imageCompressedPath + ".webp",
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new VOption { { "Q", 80 }, { "strip", true } });
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result.Add((imageCompressedPath + ".webp", ".compressed"));
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file.HasCompression = true;
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}
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}
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else
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{
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// No extra process for video, add it to the upload queue.
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result.Add((ogFilePath, string.Empty));
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}
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logger.LogInformation("Optimized file {fileId}, now uploading...", fileId);
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if (result.Count > 0)
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{
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List<Task<CloudFile>> tasks = [];
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tasks.AddRange(result.Select(item =>
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nfs.UploadFileToRemoteAsync(file, item.filePath, null, item.suffix, true))
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);
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await Task.WhenAll(tasks);
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file = await tasks.First();
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}
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else
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{
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file = await nfs.UploadFileToRemoteAsync(file, stream, null);
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}
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logger.LogInformation("Uploaded file {fileId} done!", fileId);
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var scopedDb = scope.ServiceProvider.GetRequiredService<AppDatabase>();
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await scopedDb.Files.Where(f => f.Id == file.Id).ExecuteUpdateAsync(setter => setter
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.SetProperty(f => f.UploadedAt, file.UploadedAt)
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.SetProperty(f => f.UploadedTo, file.UploadedTo)
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.SetProperty(f => f.MimeType, file.MimeType)
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.SetProperty(f => f.HasCompression, file.HasCompression)
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);
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}
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catch (Exception err)
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{
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logger.LogError(err, "Failed to process {fileId}", fileId);
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}
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await stream.DisposeAsync();
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await store.DeleteFileAsync(file.Id, CancellationToken.None);
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await nfs._PurgeCacheAsync(file.Id);
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});
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return file;
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}
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private static async Task<string> HashFileAsync(Stream stream, int chunkSize = 1024 * 1024, long? fileSize = null)
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{
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fileSize ??= stream.Length;
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if (fileSize > chunkSize * 1024 * 5)
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return await HashFastApproximateAsync(stream, chunkSize);
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using var md5 = MD5.Create();
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var hashBytes = await md5.ComputeHashAsync(stream);
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return Convert.ToHexString(hashBytes).ToLowerInvariant();
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}
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private static async Task<string> HashFastApproximateAsync(Stream stream, int chunkSize = 1024 * 1024)
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{
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// Scale the chunk size to kB level
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chunkSize *= 1024;
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using var md5 = MD5.Create();
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var buffer = new byte[chunkSize * 2];
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var fileLength = stream.Length;
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var bytesRead = await stream.ReadAsync(buffer.AsMemory(0, chunkSize));
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if (fileLength > chunkSize)
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{
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stream.Seek(-chunkSize, SeekOrigin.End);
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bytesRead += await stream.ReadAsync(buffer.AsMemory(chunkSize, chunkSize));
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}
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var hash = md5.ComputeHash(buffer, 0, bytesRead);
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return Convert.ToHexString(hash).ToLowerInvariant();
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}
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public async Task<CloudFile> UploadFileToRemoteAsync(CloudFile file, string filePath, string? targetRemote,
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string? suffix = null, bool selfDestruct = false)
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{
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var fileStream = File.OpenRead(filePath);
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var result = await UploadFileToRemoteAsync(file, fileStream, targetRemote, suffix);
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if (selfDestruct) File.Delete(filePath);
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return result;
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}
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public async Task<CloudFile> UploadFileToRemoteAsync(CloudFile file, Stream stream, string? targetRemote,
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string? suffix = null)
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{
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if (file.UploadedAt.HasValue) return file;
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file.UploadedTo = targetRemote ?? configuration.GetValue<string>("Storage:PreferredRemote")!;
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var dest = GetRemoteStorageConfig(file.UploadedTo);
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var client = CreateMinioClient(dest);
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if (client is null)
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throw new InvalidOperationException(
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$"Failed to configure client for remote destination '{file.UploadedTo}'"
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);
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var bucket = dest.Bucket;
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var contentType = file.MimeType ?? "application/octet-stream";
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await client.PutObjectAsync(new PutObjectArgs()
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.WithBucket(bucket)
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.WithObject(string.IsNullOrWhiteSpace(suffix) ? file.Id : file.Id + suffix)
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.WithStreamData(stream) // Fix this disposed
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.WithObjectSize(stream.Length)
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.WithContentType(contentType)
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);
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file.UploadedAt = Instant.FromDateTimeUtc(DateTime.UtcNow);
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return file;
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}
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public async Task DeleteFileAsync(CloudFile file)
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{
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await DeleteFileDataAsync(file);
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db.Remove(file);
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await db.SaveChangesAsync();
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await _PurgeCacheAsync(file.Id);
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}
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public async Task DeleteFileDataAsync(CloudFile file)
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{
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if (file.StorageId is null) return;
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if (file.UploadedTo is null) return;
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// Check if any other file with the same storage ID is referenced
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var otherFilesWithSameStorageId = await db.Files
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.Where(f => f.StorageId == file.StorageId && f.Id != file.Id)
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.Select(f => f.Id)
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.ToListAsync();
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// Check if any of these files are referenced
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var anyReferenced = false;
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if (otherFilesWithSameStorageId.Any())
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{
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anyReferenced = await db.FileReferences
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.Where(r => otherFilesWithSameStorageId.Contains(r.FileId))
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.AnyAsync();
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}
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// If any other file with the same storage ID is referenced, don't delete the actual file data
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if (anyReferenced) return;
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var dest = GetRemoteStorageConfig(file.UploadedTo);
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var client = CreateMinioClient(dest);
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if (client is null)
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throw new InvalidOperationException(
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$"Failed to configure client for remote destination '{file.UploadedTo}'"
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);
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var bucket = dest.Bucket;
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var objectId = file.StorageId ?? file.Id; // Use StorageId if available, otherwise fall back to Id
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await client.RemoveObjectAsync(
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new RemoveObjectArgs().WithBucket(bucket).WithObject(objectId)
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);
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if (file.HasCompression)
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{
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// Also remove the compressed version if it exists
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try
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{
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await client.RemoveObjectAsync(
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new RemoveObjectArgs().WithBucket(bucket).WithObject(objectId + ".compressed")
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);
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}
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catch
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{
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// Ignore errors when deleting compressed version
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logger.LogWarning("Failed to delete compressed version of file {fileId}", file.Id);
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}
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}
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}
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public RemoteStorageConfig GetRemoteStorageConfig(string destination)
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{
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var destinations = configuration.GetSection("Storage:Remote").Get<List<RemoteStorageConfig>>()!;
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var dest = destinations.FirstOrDefault(d => d.Id == destination);
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if (dest is null) throw new InvalidOperationException($"Remote destination '{destination}' not found");
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return dest;
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}
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public IMinioClient? CreateMinioClient(RemoteStorageConfig dest)
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{
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var client = new MinioClient()
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.WithEndpoint(dest.Endpoint)
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.WithRegion(dest.Region)
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.WithCredentials(dest.SecretId, dest.SecretKey);
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if (dest.EnableSsl) client = client.WithSSL();
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return client.Build();
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}
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// Helper method to purge the cache for a specific file
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// Made internal to allow FileReferenceService to use it
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internal async Task _PurgeCacheAsync(string fileId)
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{
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var cacheKey = $"{CacheKeyPrefix}{fileId}";
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await cache.RemoveAsync(cacheKey);
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}
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// Helper method to purge cache for multiple files
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internal async Task _PurgeCacheRangeAsync(IEnumerable<string> fileIds)
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{
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var tasks = fileIds.Select(_PurgeCacheAsync);
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await Task.WhenAll(tasks);
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}
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public async Task<List<CloudFile?>> LoadFromReference(List<CloudFileReferenceObject> references)
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{
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var cachedFiles = new Dictionary<string, CloudFile>();
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var uncachedIds = new List<string>();
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// Check cache first
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foreach (var reference in references)
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{
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var cacheKey = $"{CacheKeyPrefix}{reference.Id}";
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var cachedFile = await cache.GetAsync<CloudFile>(cacheKey);
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if (cachedFile != null)
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{
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cachedFiles[reference.Id] = cachedFile;
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}
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else
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{
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uncachedIds.Add(reference.Id);
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}
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}
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// Load uncached files from database
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if (uncachedIds.Count > 0)
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{
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var dbFiles = await db.Files
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.Include(f => f.Account)
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.Where(f => uncachedIds.Contains(f.Id))
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.ToListAsync();
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// Add to cache
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foreach (var file in dbFiles)
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{
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var cacheKey = $"{CacheKeyPrefix}{file.Id}";
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await cache.SetAsync(cacheKey, file, CacheDuration);
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cachedFiles[file.Id] = file;
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}
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}
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// Preserve original order
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return references
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.Select(r => cachedFiles.GetValueOrDefault(r.Id))
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.Where(f => f != null)
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.ToList();
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}
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/// <summary>
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/// Gets the number of references to a file based on CloudFileReference records
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/// </summary>
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/// <param name="fileId">The ID of the file</param>
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/// <returns>The number of references to the file</returns>
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public async Task<int> GetReferenceCountAsync(string fileId)
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{
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return await db.FileReferences
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.Where(r => r.FileId == fileId)
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.CountAsync();
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}
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/// <summary>
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/// Checks if a file is referenced by any resource
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/// </summary>
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/// <param name="fileId">The ID of the file to check</param>
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/// <returns>True if the file is referenced, false otherwise</returns>
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public async Task<bool> IsReferencedAsync(string fileId)
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{
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return await db.FileReferences
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.Where(r => r.FileId == fileId)
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.AnyAsync();
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}
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/// <summary>
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/// Checks if an EXIF field contains GPS location data
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/// </summary>
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/// <param name="fieldName">The EXIF field name</param>
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/// <returns>True if the field contains GPS data, false otherwise</returns>
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private static bool IsGpsExifField(string fieldName)
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{
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// Common GPS EXIF field names
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var gpsFields = new[]
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{
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"gps-latitude",
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"gps-longitude",
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"gps-altitude",
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"gps-latitude-ref",
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"gps-longitude-ref",
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"gps-altitude-ref",
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"gps-timestamp",
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"gps-datestamp",
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"gps-speed",
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"gps-speed-ref",
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"gps-track",
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"gps-track-ref",
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"gps-img-direction",
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"gps-img-direction-ref",
|
|
"gps-dest-latitude",
|
|
"gps-dest-longitude",
|
|
"gps-dest-latitude-ref",
|
|
"gps-dest-longitude-ref",
|
|
"gps-processing-method",
|
|
"gps-area-information"
|
|
};
|
|
|
|
return gpsFields.Any(gpsField =>
|
|
fieldName.Equals(gpsField, StringComparison.OrdinalIgnoreCase) ||
|
|
fieldName.StartsWith("gps", StringComparison.OrdinalIgnoreCase));
|
|
}
|
|
|
|
private static bool IsIgnoredField(string fieldName)
|
|
{
|
|
if (IsGpsExifField(fieldName)) return true;
|
|
if (fieldName.EndsWith("-data")) return true;
|
|
return false;
|
|
}
|
|
} |