fix: 优化项目代码

1、修复部分字幕下载问题
2、修复自定义aria2设置出错问题

DownKyi/CustomControl/AsyncImageLoader/Loaders/DiskCachedWebImageLoader.cs

@@ -0,0 +1,60 @@
+using System;
+using System.IO;
+using System.Net.Http;
+using System.Security.Cryptography;
+using System.Text;
+using System.Threading.Tasks;
+using Avalonia.Media.Imaging;
+
+namespace DownKyi.CustomControl.AsyncImageLoader.Loaders;
+
+public class DiskCachedWebImageLoader : BaseWebImageLoader
+{
+    private readonly string _cacheFolder;
+
+    public DiskCachedWebImageLoader(string cacheFolder = "Cache/Images/")
+    {
+        _cacheFolder = cacheFolder;
+    }
+
+    public DiskCachedWebImageLoader(HttpClient httpClient, bool disposeHttpClient, string cacheFolder = "Cache/Images/") : base(httpClient, disposeHttpClient)
+    {
+        _cacheFolder = cacheFolder;
+    }
+
+    /// <inheritdoc />
+    protected override Task<Bitmap?> LoadFromGlobalCache(string url)
+    {
+        var path = Path.Combine(_cacheFolder, CreateMd5(url));
+
+        return File.Exists(path) ? Task.FromResult<Bitmap?>(new Bitmap(path)) : Task.FromResult<Bitmap?>(null);
+    }
+
+#if NETSTANDARD2_1
+        protected override async Task SaveToGlobalCache(string url, byte[] imageBytes) {
+            var path = Path.Combine(_cacheFolder, CreateMd5(url));
+
+            Directory.CreateDirectory(_cacheFolder);
+            await File.WriteAllBytesAsync(path, imageBytes).ConfigureAwait(false);
+        }
+#else
+    protected override Task SaveToGlobalCache(string url, byte[] imageBytes)
+    {
+        var path = Path.Combine(_cacheFolder, CreateMd5(url));
+        Directory.CreateDirectory(_cacheFolder);
+        File.WriteAllBytes(path, imageBytes);
+        return Task.CompletedTask;
+    }
+#endif
+
+    protected static string CreateMd5(string input)
+    {
+        // Use input string to calculate MD5 hash
+        using var md5 = MD5.Create();
+        var inputBytes = Encoding.ASCII.GetBytes(input);
+        var hashBytes = md5.ComputeHash(inputBytes);
+
+        // Convert the byte array to hexadecimal string
+        return BitConverter.ToString(hashBytes).Replace("-", "");
+    }
+}