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SophonAsset.Diff.cs
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using Hi3Helper.Sophon.Helper;
using Hi3Helper.Sophon.Structs;
using System;
using System.Buffers;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Net.Http;
using System.Threading;
using System.Threading.Tasks;
#if !NET6_0_OR_GREATER
using System.Threading.Tasks.Dataflow;
#endif
using TaskExtensions = Hi3Helper.Sophon.Helper.TaskExtensions;
using ZstdStream = ZstdNet.DecompressionStream;
// ReSharper disable InvalidXmlDocComment
// ReSharper disable IdentifierTypo
namespace Hi3Helper.Sophon
{
public partial class SophonAsset
{
private int _countChunksDownload;
private int _currentChunksDownloadPos;
private int _currentChunksDownloadQueue;
/// <summary>
/// Perform a download for staged chunks used as a new data or data diff. for preload and update.
/// </summary>
/// <param name="client">
/// The <see cref="HttpClient" /> to be used for downloading process.<br />Ensure that the maximum connection for the
/// <see cref="HttpClient" /> has been set to at least (Number of Threads/CPU core * 25%) or == Number of Threads/CPU
/// core
/// </param>
/// <param name="chunkDirOutput">
/// The directory of the staged chunk.
/// </param>
/// <param name="parallelOptions">
/// Parallelization settings to be used for downloading chunks and data hashing.
/// Remember that while using this method, the <seealso cref="CancellationToken" /> needs to be passed with
/// <c>CancellationToken</c> property.<br />
/// If it's being set to <c>null</c>, a default setting will be used as below:
/// <code>
/// CancellationToken = <paramref name="token" />,
/// MaxDegreeOfParallelism = [Number of CPU threads/cores available]
/// </code>
/// </param>
/// <param name="writeInfoDelegate">
/// <inheritdoc cref="DelegateWriteStreamInfo" />
/// </param>
/// <param name="downloadInfoDelegate">
/// <inheritdoc cref="DelegateWriteDownloadInfo" />
/// </param>
/// <param name="downloadCompleteDelegate">
/// <inheritdoc cref="DelegateDownloadAssetComplete" />
/// </param>
public async
#if NET6_0_OR_GREATER
ValueTask
#else
Task
#endif
DownloadDiffChunksAsync(HttpClient client,
string chunkDirOutput,
ParallelOptions parallelOptions = null,
DelegateWriteStreamInfo writeInfoDelegate = null,
DelegateWriteDownloadInfo downloadInfoDelegate = null,
DelegateDownloadAssetComplete downloadCompleteDelegate = null,
bool forceVerification = false)
{
this.EnsureOrThrowChunksState();
this.EnsureOrThrowOutputDirectoryExistence(chunkDirOutput);
_currentChunksDownloadPos = 0;
_countChunksDownload = Chunks.Length;
if (parallelOptions == null)
{
int maxChunksTask = Math.Min(8, Environment.ProcessorCount);
parallelOptions = new ParallelOptions
{
CancellationToken = default,
MaxDegreeOfParallelism = maxChunksTask
};
}
try
{
#if !NET6_0_OR_GREATER
using (CancellationTokenSource actionToken = new CancellationTokenSource())
{
using (CancellationTokenSource linkedToken = CancellationTokenSource
.CreateLinkedTokenSource(actionToken.Token, parallelOptions.CancellationToken))
{
ActionBlock<SophonChunk> actionBlock = new ActionBlock<SophonChunk>(
async chunk =>
{
await PerformWriteDiffChunksThreadAsync(client,
chunkDirOutput, chunk, linkedToken.Token,
writeInfoDelegate, downloadInfoDelegate, DownloadSpeedLimiter,
forceVerification)
.ConfigureAwait(false);
},
new ExecutionDataflowBlockOptions
{
MaxDegreeOfParallelism = parallelOptions.MaxDegreeOfParallelism,
TaskScheduler = TaskScheduler.Default,
CancellationToken = linkedToken.Token,
MaxMessagesPerTask = parallelOptions.MaxDegreeOfParallelism * Math.Max(4, Environment.ProcessorCount)
});
foreach (SophonChunk chunk in Chunks)
{
if (chunk.ChunkOldOffset > -1)
{
return;
}
await actionBlock.SendAsync(chunk, linkedToken.Token)
.ConfigureAwait(false);
}
actionBlock.Complete();
await actionBlock.Completion
.ConfigureAwait(false);
}
}
#else
await Parallel.ForEachAsync(Chunks, parallelOptions, async (chunk, threadToken) =>
{
if (chunk.ChunkOldOffset > -1)
{
return;
}
await PerformWriteDiffChunksThreadAsync(client,
chunkDirOutput, chunk,
threadToken,
writeInfoDelegate,
downloadInfoDelegate,
DownloadSpeedLimiter,
forceVerification)
.ConfigureAwait(false);
})
.ConfigureAwait(false);
#endif
}
catch (AggregateException ex)
{
throw ex.Flatten().InnerExceptions.First();
}
// Throw all other exceptions
#if DEBUG
this.PushLogInfo($"Asset: {AssetName} | (Hash: {AssetHash} -> {AssetSize} bytes) has been completely downloaded!");
#endif
downloadCompleteDelegate?.Invoke(this);
}
private async
#if NET6_0_OR_GREATER
ValueTask
#else
Task
#endif
PerformWriteDiffChunksThreadAsync(HttpClient client,
string chunkDirOutput,
SophonChunk chunk,
CancellationToken token,
DelegateWriteStreamInfo writeInfoDelegate,
DelegateWriteDownloadInfo downloadInfoDelegate,
SophonDownloadSpeedLimiter downloadSpeedLimiter,
bool forceVerification)
{
string chunkNameHashed = chunk.GetChunkStagingFilenameHash(this);
string chunkFilePathHashed = Path.Combine(chunkDirOutput, chunkNameHashed);
FileInfo chunkFilePathHashedFileInfo = new FileInfo(chunkFilePathHashed).UnassignReadOnlyFromFileInfo();
string chunkFileCheckedPath = chunkFilePathHashed + ".verified";
try
{
Interlocked.Increment(ref _currentChunksDownloadPos);
Interlocked.Increment(ref _currentChunksDownloadQueue);
using (FileStream fileStream = chunkFilePathHashedFileInfo
.Open(FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.ReadWrite))
{
bool isChunkUnmatch = fileStream.Length != chunk.ChunkSize;
bool isChunkVerified = File.Exists(chunkFileCheckedPath) && !isChunkUnmatch;
if (forceVerification || !isChunkVerified)
{
isChunkUnmatch = !(chunk.TryGetChunkXxh64Hash(out byte[] hash)
&& await chunk.CheckChunkXxh64HashAsync(this, fileStream, hash, true,
token));
if (File.Exists(chunkFileCheckedPath))
{
File.Delete(chunkFileCheckedPath);
}
}
if (!isChunkUnmatch)
{
#if DEBUG
this.PushLogDebug($"[{_currentChunksDownloadPos}/{_countChunksDownload} Queue: {_currentChunksDownloadQueue}] Skipping chunk 0x{chunk.ChunkOffset:x8} -> L: 0x{chunk.ChunkSizeDecompressed:x8} for: {AssetName}");
#endif
writeInfoDelegate?.Invoke(chunk.ChunkSize);
downloadInfoDelegate?.Invoke(chunk.ChunkSize, 0);
if (!File.Exists(chunkFileCheckedPath))
{
File.Create(chunkFileCheckedPath).Dispose();
}
return;
}
fileStream.Position = 0;
await InnerWriteChunkCopyAsync(client, fileStream, chunk, token, writeInfoDelegate,
downloadInfoDelegate, downloadSpeedLimiter);
File.Create(chunkFileCheckedPath).Dispose();
}
}
finally
{
Interlocked.Decrement(ref _currentChunksDownloadQueue);
}
}
private async
#if NET6_0_OR_GREATER
ValueTask
#else
Task
#endif
InnerWriteChunkCopyAsync(HttpClient client,
Stream outStream,
SophonChunk chunk,
CancellationToken token,
DelegateWriteStreamInfo writeInfoDelegate,
DelegateWriteDownloadInfo downloadInfoDelegate,
SophonDownloadSpeedLimiter downloadSpeedLimiter)
{
const int retryCount = TaskExtensions.DefaultRetryAttempt;
int currentRetry = 0;
long currentWriteOffset = 0;
#if !NOSTREAMLOCK
if (outStream is FileStream fs)
{
fs.Lock(chunk.ChunkOffset, chunk.ChunkSizeDecompressed);
this.PushLogDebug($"Locked data stream from pos: 0x{chunk.ChunkOffset:x8} -> L: 0x{chunk.ChunkSizeDecompressed:x8} for chunk: {chunk.ChunkName} by asset: {AssetName}");
}
#endif
long written = 0;
long thisInstanceDownloadLimitBase = downloadSpeedLimiter?.InitialRequestedSpeed ?? -1;
Stopwatch currentStopwatch = Stopwatch.StartNew();
double maximumBytesPerSecond;
double bitPerUnit;
CalculateBps();
if (downloadSpeedLimiter != null)
{
downloadSpeedLimiter.CurrentChunkProcessingChangedEvent += UpdateChunkRangesCountEvent;
downloadSpeedLimiter.DownloadSpeedChangedEvent += DownloadClient_DownloadSpeedLimitChanged;
}
while (true)
{
bool allowDispose = false;
HttpResponseMessage httpResponseMessage = null;
Stream httpResponseStream = null;
Stream sourceStream = null;
byte[] buffer = ArrayPool<byte>.Shared.Rent(BufferSize);
{
try
{
CancellationTokenSource innerTimeoutToken =
new CancellationTokenSource(TimeSpan.FromSeconds(TaskExtensions.DefaultTimeoutSec)
#if NET8_0_OR_GREATER
, TimeProvider.System
#endif
);
CancellationTokenSource cooperatedToken =
CancellationTokenSource.CreateLinkedTokenSource(token, innerTimeoutToken.Token);
#if DEBUG
this.PushLogDebug($"[{_currentChunksDownloadPos}/{_countChunksDownload} Queue: {_currentChunksDownloadQueue}] Init. by offset: 0x{chunk.ChunkOffset:x8} -> L: 0x{chunk.ChunkSizeDecompressed:x8} for chunk: {chunk.ChunkName}");
#endif
outStream.SetLength(chunk.ChunkSize);
outStream.Position = 0;
httpResponseMessage = await client.GetChunkAndIfAltAsync(
chunk.ChunkName,
SophonChunksInfo,
SophonChunksInfoAlt,
cooperatedToken.Token);
httpResponseStream = await httpResponseMessage
.EnsureSuccessStatusCode()
.Content
.ReadAsStreamAsync(
#if NET6_0_OR_GREATER
cooperatedToken.Token
#endif
);
sourceStream = httpResponseStream;
#if DEBUG
this.PushLogDebug($"[{_currentChunksDownloadPos}/{_countChunksDownload} Queue: {_currentChunksDownloadQueue}] [Complete init.] by offset: 0x{chunk.ChunkOffset:x8} -> L: 0x{chunk.ChunkSizeDecompressed:x8} for chunk: {chunk.ChunkName}");
#endif
downloadSpeedLimiter?.IncrementChunkProcessedCount();
int read;
while ((read = await sourceStream.ReadAsync(
#if NET6_0_OR_GREATER
buffer
#else
buffer, 0, buffer.Length
#endif
, cooperatedToken.Token)) >
0)
{
await outStream.WriteAsync(buffer, 0, read, cooperatedToken.Token);
currentWriteOffset += read;
writeInfoDelegate?.Invoke(read);
downloadInfoDelegate?.Invoke(read, read);
written += read;
currentRetry = 0;
innerTimeoutToken.Dispose();
cooperatedToken.Dispose();
innerTimeoutToken =
new CancellationTokenSource(TimeSpan.FromSeconds(TaskExtensions.DefaultTimeoutSec)
#if NET8_0_OR_GREATER
, TimeProvider.System
#endif
);
cooperatedToken =
CancellationTokenSource.CreateLinkedTokenSource(token, innerTimeoutToken.Token);
await ThrottleAsync();
}
outStream.Position = 0;
Stream checkHashStream = outStream;
bool isHashVerified;
if (chunk.TryGetChunkXxh64Hash(out byte[] outHash))
{
isHashVerified =
await chunk.CheckChunkXxh64HashAsync(this, checkHashStream, outHash, true,
cooperatedToken.Token);
}
else
{
if (SophonChunksInfo.IsUseCompression)
{
checkHashStream = new ZstdStream(checkHashStream);
}
isHashVerified =
await chunk.CheckChunkMd5HashAsync(checkHashStream, true, cooperatedToken.Token);
}
if (!isHashVerified)
{
writeInfoDelegate?.Invoke(-chunk.ChunkSizeDecompressed);
downloadInfoDelegate?.Invoke(-chunk.ChunkSizeDecompressed, 0);
this.PushLogWarning($"Output data seems to be corrupted at transport.\r\nRestarting download for chunk: {chunk.ChunkName} | 0x{chunk.ChunkOffset:x8} -> L: 0x{chunk.ChunkSizeDecompressed:x8} for: {AssetName}");
continue;
}
#if DEBUG
this.PushLogDebug($"[{_currentChunksDownloadPos}/{_countChunksDownload} Queue: {_currentChunksDownloadQueue}] Download completed! Chunk: {chunk.ChunkName} | 0x{chunk.ChunkOffset:x8} -> L: 0x{chunk.ChunkSizeDecompressed:x8} for: {AssetName}");
#endif
return;
}
catch (OperationCanceledException) when (token.IsCancellationRequested)
{
allowDispose = true;
throw;
}
catch (Exception ex)
{
if (currentRetry < retryCount)
{
writeInfoDelegate?.Invoke(-currentWriteOffset);
downloadInfoDelegate?.Invoke(-currentWriteOffset, 0);
currentWriteOffset = 0;
currentRetry++;
this.PushLogWarning($"An error has occurred while downloading chunk: {chunk.ChunkName} | 0x{chunk.ChunkOffset:x8} -> L: 0x{chunk.ChunkSizeDecompressed:x8} for: {AssetName}\r\n{ex}");
await Task.Delay(TimeSpan.FromSeconds(1), token);
continue;
}
allowDispose = true;
this.PushLogError($"An unhandled error has occurred while downloading chunk: {chunk.ChunkName} | 0x{chunk.ChunkOffset:x8} -> L: 0x{chunk.ChunkSizeDecompressed:x8} for: {AssetName}\r\n{ex}");
throw;
}
finally
{
if (allowDispose)
{
httpResponseMessage?.Dispose();
#if NET6_0_OR_GREATER
if (httpResponseStream != null)
{
await httpResponseStream.DisposeAsync();
}
if (sourceStream != null)
{
await sourceStream.DisposeAsync();
}
#else
sourceStream?.Dispose();
httpResponseStream?.Dispose();
#endif
}
downloadSpeedLimiter?.DecrementChunkProcessedCount();
ArrayPool<byte>.Shared.Return(buffer);
}
}
}
void CalculateBps()
{
if (thisInstanceDownloadLimitBase <= 0)
{
thisInstanceDownloadLimitBase = -1;
}
else
{
thisInstanceDownloadLimitBase = Math.Max(64 << 10, thisInstanceDownloadLimitBase);
}
double threadNum = Math.Clamp(downloadSpeedLimiter?.CurrentChunkProcessing ?? 1, 1, 16 << 10);
maximumBytesPerSecond = thisInstanceDownloadLimitBase / threadNum;
bitPerUnit = 940 - (threadNum - 2) / (16 - 2) * 400;
}
void DownloadClient_DownloadSpeedLimitChanged(object sender, long e)
{
thisInstanceDownloadLimitBase = e == 0 ? -1 : e;
CalculateBps();
}
void UpdateChunkRangesCountEvent(object sender, int e)
{
CalculateBps();
}
async Task ThrottleAsync()
{
// Make sure the buffer isn't empty.
if (maximumBytesPerSecond <= 0 || written <= 0)
{
return;
}
long elapsedMilliseconds = currentStopwatch.ElapsedMilliseconds;
if (elapsedMilliseconds > 0)
{
// Calculate the current bps.
double bps = written * bitPerUnit / elapsedMilliseconds;
// If the bps are more then the maximum bps, try to throttle.
if (bps > maximumBytesPerSecond)
{
// Calculate the time to sleep.
double wakeElapsed = written * bitPerUnit / maximumBytesPerSecond;
double toSleep = wakeElapsed - elapsedMilliseconds;
if (toSleep > 1)
{
// The time to sleep is more than a millisecond, so sleep.
await Task.Delay(TimeSpan.FromMilliseconds(toSleep), token);
// A sleep has been done, reset.
currentStopwatch.Restart();
written = 0;
}
}
}
}
}
}
}