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Performance/cache epub (#438)

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Changed: (Performance) Added the ability for epubs to cache, allowing faster page load for users with network mounted storage. (Fixes Investigate caching epubs (benefit for network mounted users) #433 )
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Joseph Milazzo 2021-07-25 19:43:37 -05:00 • committed by GitHub
parent 3dbe7eec1f
commit 3c9f73ce2c
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7 changed files with 68 additions and 21 deletions
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32
API/Services/CacheService.cs
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@ -9,6 +9,7 @@ using API.Entities.Enums;
using API.Extensions;
using API.Interfaces;
using API.Interfaces.Services;
using Kavita.Common;
using Microsoft.Extensions.Logging;
namespace API.Services
@ -42,6 +43,23 @@ namespace API.Services
}
}
/// <summary>
/// Returns the full path to the cached epub file. If the file does not exist, will fallback to the original.
/// </summary>
/// <param name="chapterId"></param>
/// <param name="chapter"></param>
/// <returns></returns>
public string GetCachedEpubFile(int chapterId, Chapter chapter)
{
var extractPath = GetCachePath(chapterId);
var path = Path.Join(extractPath, Path.GetFileName(chapter.Files.First().FilePath));
if (!(new FileInfo(path).Exists))
{
path = chapter.Files.First().FilePath;
}
return path;
}
public async Task<Chapter> Ensure(int chapterId)
{
EnsureCacheDirectory();
@ -50,6 +68,7 @@ namespace API.Services
var fileCount = files.Count;
var extractPath = GetCachePath(chapterId);
var extraPath = "";
var removeNonImages = true;
if (Directory.Exists(extractPath))
{
@ -83,15 +102,24 @@ namespace API.Services
if (file.Format == MangaFormat.Archive)
{
_archiveService.ExtractArchive(file.FilePath, Path.Join(extractPath, extraPath));
_archiveService.ExtractArchive(file.FilePath, Path.Join(extractPath, extraPath));
} else if (file.Format == MangaFormat.Pdf)
{
_bookService.ExtractPdfImages(file.FilePath, Path.Join(extractPath, extraPath));
} else if (file.Format == MangaFormat.Epub)
{
removeNonImages = false;
DirectoryService.ExistOrCreate(extractPath);
_directoryService.CopyFileToDirectory(files[0].FilePath, extractPath);
}
}
extractDi.Flatten();
extractDi.RemoveNonImages();
if (removeNonImages)
{
extractDi.RemoveNonImages();
}
return chapter;
}