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Ensure Koreader hash is generated for existing files.

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This commit is contained in:
Joseph Milazzo 2025-06-02 17:23:39 -05:00
parent 54c572a83b
commit 6498aa7fe5
2 changed files with 8 additions and 4 deletions
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10
API/Helpers/KoreaderHelper.cs
View file

@ -3,6 +3,7 @@ using System;
using System.IO;
using System.Security.Cryptography;
using System.Text;
using API.Services.Tasks.Scanner.Parser;
namespace API.Helpers;
@ -15,13 +16,14 @@ public static class KoreaderHelper
/// <summary>
/// Hashes the document according to a custom Koreader hashing algorithm.
/// Look at the util.partialMD5 method in the attached link.
/// Note: Only applies to epub files
/// </summary>
/// <remarks>The hashing algorithm is relatively quick as it only hashes ~10,000 bytes for the biggest of files.</remarks>
/// <see href="https://github.com/koreader/koreader/blob/master/frontend/util.lua#L1040"/>
/// <param name="filePath">The path to the file to hash</param>
public static string HashContents(string filePath)
{
if (string.IsNullOrEmpty(filePath) || !File.Exists(filePath))
if (string.IsNullOrEmpty(filePath) || !File.Exists(filePath) || !Parser.IsEpub(filePath))
{
return null;
}
@ -48,9 +50,9 @@ public static class KoreaderHelper
}
file.Close();
md5.TransformFinalBlock(Array.Empty<byte>(), 0, 0);
md5.TransformFinalBlock([], 0, 0);
return md5.Hash == null ? null : BitConverter.ToString(md5.Hash).Replace("-", string.Empty).ToUpper();
return md5.Hash == null ? null : Convert.ToHexString(md5.Hash).ToUpper();
}
/// <summary>
@ -63,7 +65,7 @@ public static class KoreaderHelper
var fileNameBytes = Encoding.ASCII.GetBytes(fileName);
var bytes = MD5.HashData(fileNameBytes);
return BitConverter.ToString(bytes).Replace("-", string.Empty);
return Convert.ToHexString(bytes);
}
public static void UpdateProgressDto(ProgressDto progress, string koreaderPosition)

2
API/Services/Tasks/Scanner/ProcessSeries.cs
View file

@ -880,6 +880,8 @@ public class ProcessSeries : IProcessSeries
existingFile.FileName = Parser.Parser.RemoveExtensionIfSupported(existingFile.FilePath);
existingFile.FilePath = Parser.Parser.NormalizePath(existingFile.FilePath);
existingFile.Bytes = fileInfo.Length;
existingFile.KoreaderHash = KoreaderHelper.HashContents(existingFile.FilePath);
// We skip updating DB here with last modified time so that metadata refresh can do it
}
else