| | | 1 | | using System; |
| | | 2 | | using System.Collections.Generic; |
| | | 3 | | using System.IO; |
| | | 4 | | using System.IO.Compression; |
| | | 5 | | using System.Threading; |
| | | 6 | | using System.Threading.Tasks; |
| | | 7 | | using System.Xml; |
| | | 8 | | using MediaBrowser.Controller.Entities; |
| | | 9 | | using MediaBrowser.Controller.Providers; |
| | | 10 | | using MediaBrowser.Model.Entities; |
| | | 11 | | using Microsoft.Extensions.Logging; |
| | | 12 | | |
| | | 13 | | namespace MediaBrowser.Providers.Books.OpenPackagingFormat |
| | | 14 | | { |
| | | 15 | | /// <summary> |
| | | 16 | | /// Provides the primary image for EPUB items that have embedded covers. |
| | | 17 | | /// </summary> |
| | | 18 | | public class EpubImageProvider : IDynamicImageProvider |
| | | 19 | | { |
| | | 20 | | private readonly ILogger<EpubImageProvider> _logger; |
| | | 21 | | |
| | | 22 | | /// <summary> |
| | | 23 | | /// Initializes a new instance of the <see cref="EpubImageProvider"/> class. |
| | | 24 | | /// </summary> |
| | | 25 | | /// <param name="logger">Instance of the <see cref="ILogger{EpubImageProvider}"/> interface.</param> |
| | | 26 | | public EpubImageProvider(ILogger<EpubImageProvider> logger) |
| | | 27 | | { |
| | 27 | 28 | | _logger = logger; |
| | 27 | 29 | | } |
| | | 30 | | |
| | | 31 | | /// <inheritdoc /> |
| | 0 | 32 | | public string Name => "EPUB Metadata"; |
| | | 33 | | |
| | | 34 | | /// <inheritdoc /> |
| | | 35 | | public bool Supports(BaseItem item) |
| | | 36 | | { |
| | 107 | 37 | | return item is Book; |
| | | 38 | | } |
| | | 39 | | |
| | | 40 | | /// <inheritdoc /> |
| | | 41 | | public IEnumerable<ImageType> GetSupportedImages(BaseItem item) |
| | | 42 | | { |
| | 0 | 43 | | yield return ImageType.Primary; |
| | 0 | 44 | | } |
| | | 45 | | |
| | | 46 | | /// <inheritdoc /> |
| | | 47 | | public Task<DynamicImageResponse> GetImage(BaseItem item, ImageType type, CancellationToken cancellationToken) |
| | | 48 | | { |
| | 0 | 49 | | if (string.Equals(Path.GetExtension(item.Path), ".epub", StringComparison.OrdinalIgnoreCase)) |
| | | 50 | | { |
| | 0 | 51 | | return GetFromZip(item, cancellationToken); |
| | | 52 | | } |
| | | 53 | | |
| | 0 | 54 | | return Task.FromResult(new DynamicImageResponse { HasImage = false }); |
| | | 55 | | } |
| | | 56 | | |
| | | 57 | | private async Task<DynamicImageResponse> LoadCover(ZipArchive epub, XmlDocument opf, string opfRootDirectory, Ca |
| | | 58 | | { |
| | 0 | 59 | | var utilities = new OpfReader<EpubImageProvider>(opf, _logger); |
| | 0 | 60 | | var coverReference = utilities.ReadCoverPath(opfRootDirectory); |
| | 0 | 61 | | if (coverReference == null) |
| | | 62 | | { |
| | 0 | 63 | | return new DynamicImageResponse { HasImage = false }; |
| | | 64 | | } |
| | | 65 | | |
| | 0 | 66 | | var cover = coverReference.Value; |
| | | 67 | | // ZIP entry names always use '/', but the cover path is built with Path.Combine, which uses '\' on Windows |
| | 0 | 68 | | var coverFile = epub.GetEntry(cover.Path.Replace('\\', '/')); |
| | | 69 | | |
| | 0 | 70 | | if (coverFile == null) |
| | | 71 | | { |
| | 0 | 72 | | return new DynamicImageResponse { HasImage = false }; |
| | | 73 | | } |
| | | 74 | | |
| | 0 | 75 | | var memoryStream = new MemoryStream(); |
| | | 76 | | |
| | 0 | 77 | | var coverStream = await coverFile.OpenAsync(cancellationToken).ConfigureAwait(false); |
| | 0 | 78 | | await using (coverStream.ConfigureAwait(false)) |
| | | 79 | | { |
| | 0 | 80 | | await coverStream.CopyToAsync(memoryStream, cancellationToken).ConfigureAwait(false); |
| | | 81 | | } |
| | | 82 | | |
| | 0 | 83 | | memoryStream.Position = 0; |
| | | 84 | | |
| | 0 | 85 | | var response = new DynamicImageResponse { HasImage = true, Stream = memoryStream }; |
| | 0 | 86 | | response.SetFormatFromMimeType(cover.MimeType); |
| | | 87 | | |
| | 0 | 88 | | return response; |
| | 0 | 89 | | } |
| | | 90 | | |
| | | 91 | | private async Task<DynamicImageResponse> GetFromZip(BaseItem item, CancellationToken cancellationToken) |
| | | 92 | | { |
| | 0 | 93 | | using var epub = await ZipFile.OpenReadAsync(item.Path, cancellationToken).ConfigureAwait(false); |
| | | 94 | | |
| | 0 | 95 | | var opfFilePath = EpubUtils.ReadContentFilePath(epub); |
| | 0 | 96 | | if (opfFilePath == null) |
| | | 97 | | { |
| | 0 | 98 | | return new DynamicImageResponse { HasImage = false }; |
| | | 99 | | } |
| | | 100 | | |
| | 0 | 101 | | var opfRootDirectory = Path.GetDirectoryName(opfFilePath); |
| | 0 | 102 | | if (opfRootDirectory == null) |
| | | 103 | | { |
| | 0 | 104 | | return new DynamicImageResponse { HasImage = false }; |
| | | 105 | | } |
| | | 106 | | |
| | 0 | 107 | | var opfFile = epub.GetEntry(opfFilePath); |
| | 0 | 108 | | if (opfFile == null) |
| | | 109 | | { |
| | 0 | 110 | | return new DynamicImageResponse { HasImage = false }; |
| | | 111 | | } |
| | | 112 | | |
| | 0 | 113 | | using var opfStream = await opfFile.OpenAsync(cancellationToken).ConfigureAwait(false); |
| | | 114 | | |
| | 0 | 115 | | var opfDocument = new XmlDocument(); |
| | 0 | 116 | | opfDocument.Load(opfStream); |
| | | 117 | | |
| | 0 | 118 | | return await LoadCover(epub, opfDocument, opfRootDirectory, cancellationToken).ConfigureAwait(false); |
| | 0 | 119 | | } |
| | | 120 | | } |
| | | 121 | | } |