Lightless-Sync/LightlessServer
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adds the ability for shards to sync with the main server regarding their caches, when pulling files from main server the shard can stream it to the client directly while downloading and add info for server to report to client regarding file locations across shards

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This commit is contained in:
Abelfreyja
2026-01-14 16:52:06 +09:00
parent e8c56bb3bc
commit 0eea339e41
11 changed files with 915 additions and 27 deletions
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19
LightlessSyncServer/LightlessSyncStaticFilesServer/Services/CDNDownloadsService.cs
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@@ -1,4 +1,5 @@
using System.IO;
using System.Threading;
using System.Threading.Tasks;
namespace LightlessSyncStaticFilesServer.Services;
@@ -13,7 +14,7 @@ public class CDNDownloadsService
Success
}
public readonly record struct Result(ResultStatus Status, FileInfo? File);
public readonly record struct Result(ResultStatus Status, FileInfo? File, Stream? Stream, long? ContentLength);
private readonly CDNDownloadUrlService _cdnDownloadUrlService;
private readonly CachedFileProvider _cachedFileProvider;
@@ -26,31 +27,31 @@ public class CDNDownloadsService
public bool DownloadsEnabled => _cdnDownloadUrlService.DirectDownloadsEnabled;
public async Task<Result> GetDownloadAsync(string hash, long expiresUnixSeconds, string signature)
public async Task<Result> GetDownloadAsync(string hash, long expiresUnixSeconds, string signature, CancellationToken ct)
{
if (!_cdnDownloadUrlService.DirectDownloadsEnabled)
{
return new Result(ResultStatus.Disabled, null);
return new Result(ResultStatus.Disabled, null, null, null);
}
if (string.IsNullOrEmpty(signature) || string.IsNullOrEmpty(hash))
{
return new Result(ResultStatus.Unauthorized, null);
return new Result(ResultStatus.Unauthorized, null, null, null);
}
hash = hash.ToUpperInvariant();
if (!_cdnDownloadUrlService.TryValidateSignature(hash, expiresUnixSeconds, signature))
{
return new Result(ResultStatus.Unauthorized, null);
return new Result(ResultStatus.Unauthorized, null, null, null);
}
var fileInfo = await _cachedFileProvider.DownloadAndGetLocalFileInfo(hash).ConfigureAwait(false);
if (fileInfo == null)
var fileResult = await _cachedFileProvider.GetFileStreamForDirectDownloadAsync(hash, ct).ConfigureAwait(false);
if (fileResult == null)
{
return new Result(ResultStatus.NotFound, null);
return new Result(ResultStatus.NotFound, null, null, null);
}
return new Result(ResultStatus.Success, fileInfo);
return new Result(ResultStatus.Success, fileResult.Value.File, fileResult.Value.Stream, fileResult.Value.ContentLength);
}
}