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Update ImageFileCache.cs

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ClemensFischer 2024-02-04 20:51:26 +01:00
parent 5bd783d9a6
commit 79fb2abfba
1 changed files with 9 additions and 8 deletions
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17
MapControl/Shared/ImageFileCache.cs
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@ -22,7 +22,8 @@ namespace MapControl.Caching
/// </summary>
public partial class ImageFileCache : IDistributedCache
{
private static readonly byte[] expirationTag = Encoding.ASCII.GetBytes("EXPIRES:");
private static readonly byte[] expirationTagBytes = Encoding.ASCII.GetBytes("EXPIRES:");
private static readonly long expirationTagLong = BitConverter.ToInt64(expirationTagBytes, 0);
private readonly IDistributedCache memoryCache = new MemoryDistributedCache(Options.Create(new MemoryDistributedCacheOptions()));
private readonly string rootDirectory;
@ -144,10 +145,10 @@ namespace MapControl.Caching
if (expiration.HasValue)
{
var expirationBytes = BitConverter.GetBytes(expiration.Value.Ticks);
var expirationValueBytes = BitConverter.GetBytes(expiration.Value.Ticks);
Write(stream, expirationTag);
Write(stream, expirationBytes);
Write(stream, expirationTagBytes);
Write(stream, expirationValueBytes);
}
}
@ -183,10 +184,10 @@ namespace MapControl.Caching
if (expiration.HasValue)
{
var expirationBytes = BitConverter.GetBytes(expiration.Value.Ticks);
var expirationValueBytes = BitConverter.GetBytes(expiration.Value.Ticks);
await WriteAsync(stream, expirationTag).ConfigureAwait(false);
await WriteAsync(stream, expirationBytes).ConfigureAwait(false);
await WriteAsync(stream, expirationTagBytes).ConfigureAwait(false);
await WriteAsync(stream, expirationValueBytes).ConfigureAwait(false);
}
}
@ -374,7 +375,7 @@ namespace MapControl.Caching
DateTimeOffset? expiration = null;
if (buffer.Length >= 16 &&
Enumerable.SequenceEqual(buffer.Skip(buffer.Length - 16).Take(8), expirationTag))
BitConverter.ToInt64(buffer, buffer.Length - 16) == expirationTagLong)
{
var expirationTicks = BitConverter.ToInt64(buffer, buffer.Length - 8);