1135 lines
43 KiB
C#
1135 lines
43 KiB
C#
using System.Buffers;
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using System.Diagnostics;
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using System.Diagnostics.CodeAnalysis;
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using System.IO.Pipelines;
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using System.Runtime.CompilerServices;
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using System.Runtime.InteropServices;
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using System.Text;
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using AyCode.Core.Serializers.Binaries;
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using Microsoft.AspNetCore.Connections;
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using Microsoft.AspNetCore.SignalR;
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using Microsoft.AspNetCore.SignalR.Protocol;
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using Microsoft.Extensions.Logging;
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namespace AyCode.Services.SignalRs;
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/// <summary>
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/// Custom SignalR hub protocol using AcBinarySerializer for wire format.
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/// Eliminates JSON+Base64 overhead by serializing all HubMessages directly to binary.
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///
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/// Wire format per message:
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/// [4 bytes: payload length (little-endian)] [payload bytes]
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///
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/// Payload structure:
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/// [1 byte: message type] [message-specific fields serialized via AcBinary]
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///
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/// Message types map 1:1 to SignalR HubMessageType values.
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/// Arguments are serialized individually with an INT32 length prefix each,
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/// enabling deferred deserialization via IHubProtocol's binder pattern.
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///
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/// Write path: BufferWriterBinaryOutput for zero virtual dispatch on the hot path.
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/// Argument payloads serialized directly to the pipe via AcBinarySerializer (zero-copy write).
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///
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/// Read path: SequenceReader<byte> reads directly from the pipe's ReadOnlySequence.
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/// Argument deserialization uses the pipe's backing byte[] via TryGetArray (zero-copy read).
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/// </summary>
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public class AcBinaryHubProtocol : IHubProtocol
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{
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private const int LengthPrefixSize = 4;
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// Message type markers (matching HubMessageType enum values)
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private const byte MsgInvocation = 1;
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private const byte MsgStreamItem = 2;
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private const byte MsgCompletion = 3;
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private const byte MsgStreamInvocation = 4;
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private const byte MsgCancelInvocation = 5;
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private const byte MsgPing = 6;
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private const byte MsgClose = 7;
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private const byte MsgAck = 8;
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private const byte MsgSequence = 9;
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// Chunked protocol framing for AsyncSegment mode
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private const byte MsgAsyncChunkStart = 200;
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private const byte MsgAsyncChunkData = 201;
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private const byte MsgAsyncChunkEnd = 202;
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/// <summary>Sentinel object placed in the args array for the streamed argument (replaced after chunk deserialization).</summary>
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protected static readonly object StreamedArgPlaceholder = new();
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protected volatile AcBinarySerializerOptions _options;
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protected readonly BinaryProtocolMode _protocolMode;
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protected readonly ILogger? _logger;
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/// <summary>Per-connection chunk accumulation state. Key is IInvocationBinder (per-connection, GC-friendly).</summary>
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private readonly ConditionalWeakTable<IInvocationBinder, AsyncChunkState>? _chunkStates;
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private sealed class AsyncChunkState
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{
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public HubMessage PartialMessage = null!;
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public object?[] Args = null!;
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public int StreamedArgIndex;
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public Type StreamedArgType = null!;
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public Pipe InternalPipe = null!;
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public Task<object?>? DeserTask;
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}
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public AcBinaryHubProtocol() : this(AcBinarySerializerOptions.Default) { }
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public AcBinaryHubProtocol(AcBinarySerializerOptions options, BinaryProtocolMode protocolMode = BinaryProtocolMode.Bytes, ILogger? logger = null)
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{
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_options = options;
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_options.BufferWriterChunkSize = 4096;
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_protocolMode = protocolMode;
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_logger = logger;
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_chunkStates = protocolMode == BinaryProtocolMode.AsyncSegment
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? new ConditionalWeakTable<IInvocationBinder, AsyncChunkState>()
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: null;
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}
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/// <summary>
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/// Runtime-replaceable serializer options.
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/// Thread-safe: uses volatile field, callers see the new options on next message.
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/// </summary>
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public AcBinarySerializerOptions Options
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{
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get => _options;
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set => _options = value;
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}
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public string Name => "acbinary";
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public int Version => 1;
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public TransferFormat TransferFormat => TransferFormat.Binary;
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/// <summary>
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/// Synchronously gets the result of a PipeWriter.FlushAsync ValueTask.
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/// Fast-path: if already completed (no backpressure), returns directly without Task allocation.
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/// Slow-path: converts to Task for proper blocking when pipe backpressure is active.
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/// </summary>
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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private static FlushResult SyncFlush(ValueTask<FlushResult> vt)
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=> vt.IsCompletedSuccessfully ? vt.Result : vt.AsTask().GetAwaiter().GetResult();
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public bool IsVersionSupported(int version) => version <= Version;
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#region WriteMessage
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public ReadOnlyMemory<byte> GetMessageBytes(HubMessage message)
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{
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// +LengthPrefixSize: prevents ArrayBufferWriter resize on first GetMemory,
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// which would invalidate the length prefix span obtained before Advance.
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var writer = new ArrayBufferWriter<byte>(_options.BufferWriterChunkSize + LengthPrefixSize);
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WriteMessage(message, writer);
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return writer.WrittenMemory;
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}
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public void WriteMessage(HubMessage message, IBufferWriter<byte> output)
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{
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// AsyncSegment: chunked protocol framing for messages with streamable arguments
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if (_protocolMode == BinaryProtocolMode.AsyncSegment
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&& output is PipeWriter pipeWriter
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&& HasStreamableArgs(message))
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{
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WriteMessageChunked(message, pipeWriter);
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return;
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}
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// Reserve outer length prefix directly on the pipe (before BWO takes over)
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var lengthSpan = output.GetSpan(LengthPrefixSize);
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output.Advance(LengthPrefixSize);
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var bw = new BufferWriterBinaryOutput(output, _options.BufferWriterChunkSize);
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var externalBytes = 0;
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switch (message)
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{
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case InvocationMessage m:
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WriteInvocation(ref bw, output, m, ref externalBytes);
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break;
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case StreamInvocationMessage m:
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WriteStreamInvocation(ref bw, output, m, ref externalBytes);
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break;
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case StreamItemMessage m:
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WriteStreamItem(ref bw, output, m, ref externalBytes);
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break;
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case CompletionMessage m:
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WriteCompletion(ref bw, output, m, ref externalBytes);
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break;
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case CancelInvocationMessage m:
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WriteCancelInvocation(ref bw, m);
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break;
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case PingMessage:
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bw.WriteByte(MsgPing);
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break;
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case CloseMessage m:
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WriteClose(ref bw, m);
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break;
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case AckMessage m:
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bw.WriteByte(MsgAck);
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bw.WriteRaw(m.SequenceId);
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break;
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case SequenceMessage m:
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bw.WriteByte(MsgSequence);
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bw.WriteRaw(m.SequenceId);
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break;
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default:
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throw new HubException($"Unexpected message type: {message.GetType().Name}");
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}
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var totalPayload = bw.Position + externalBytes;
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bw.Flush();
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Unsafe.WriteUnaligned(ref lengthSpan[0], totalPayload);
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if (_logger != null && _logger.IsEnabled(LogLevel.Debug))
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_logger.LogDebug("WriteMessage {MessageType} payloadSize={PayloadSize}", message.GetType().Name, totalPayload);
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}
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private void WriteInvocation(ref BufferWriterBinaryOutput bw, IBufferWriter<byte> output, InvocationMessage m, ref int externalBytes)
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{
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bw.WriteByte(MsgInvocation);
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WriteNullableString(ref bw, m.InvocationId);
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bw.WriteStringUtf8(m.Target);
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WriteArguments(ref bw, output, m.Arguments, ref externalBytes);
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WriteStringArray(ref bw, m.StreamIds);
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WriteHeaders(ref bw, m.Headers);
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}
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private void WriteStreamInvocation(ref BufferWriterBinaryOutput bw, IBufferWriter<byte> output, StreamInvocationMessage m, ref int externalBytes)
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{
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bw.WriteByte(MsgStreamInvocation);
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bw.WriteStringUtf8(m.InvocationId!);
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bw.WriteStringUtf8(m.Target);
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WriteArguments(ref bw, output, m.Arguments, ref externalBytes);
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WriteStringArray(ref bw, m.StreamIds);
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WriteHeaders(ref bw, m.Headers);
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}
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private void WriteStreamItem(ref BufferWriterBinaryOutput bw, IBufferWriter<byte> output, StreamItemMessage m, ref int externalBytes)
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{
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bw.WriteByte(MsgStreamItem);
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bw.WriteStringUtf8(m.InvocationId!);
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WriteArgument(ref bw, output, m.Item, ref externalBytes);
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WriteHeaders(ref bw, m.Headers);
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}
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private void WriteCompletion(ref BufferWriterBinaryOutput bw, IBufferWriter<byte> output, CompletionMessage m, ref int externalBytes)
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{
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bw.WriteByte(MsgCompletion);
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bw.WriteStringUtf8(m.InvocationId!);
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WriteNullableString(ref bw, m.Error);
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var hasResult = m.HasResult;
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bw.WriteByte(hasResult ? (byte)1 : (byte)0);
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if (hasResult)
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WriteArgument(ref bw, output, m.Result, ref externalBytes);
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WriteHeaders(ref bw, m.Headers);
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}
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private static void WriteCancelInvocation(ref BufferWriterBinaryOutput bw, CancelInvocationMessage m)
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{
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bw.WriteByte(MsgCancelInvocation);
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bw.WriteStringUtf8(m.InvocationId!);
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WriteHeaders(ref bw, m.Headers);
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}
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private static void WriteClose(ref BufferWriterBinaryOutput bw, CloseMessage m)
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{
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bw.WriteByte(MsgClose);
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WriteNullableString(ref bw, m.Error);
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bw.WriteByte(m.AllowReconnect ? (byte)1 : (byte)0);
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}
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#endregion
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#region Chunked Protocol (AsyncSegment write)
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/// <summary>
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/// Returns true if the message has arguments that should be streamed via chunked protocol.
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/// Only non-null, non-byte[] arguments go through the chunked path.
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/// </summary>
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private static bool HasStreamableArgs(HubMessage message) => message switch
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{
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InvocationMessage m => HasNonByteArrayArg(m.Arguments),
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StreamInvocationMessage m => HasNonByteArrayArg(m.Arguments),
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StreamItemMessage m => m.Item != null && m.Item is not byte[],
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CompletionMessage m => m.HasResult && m.Result != null && m.Result is not byte[],
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_ => false
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};
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private static bool HasNonByteArrayArg(object?[] args)
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{
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for (var i = args.Length - 1; i >= 0; i--)
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{
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if (args[i] != null && args[i] is not byte[])
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return true;
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}
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return false;
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}
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/// <summary>
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/// Gets the last non-null, non-byte[] argument value and its index for streaming.
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/// </summary>
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private static (object? value, int index) GetStreamedArg(HubMessage message) => message switch
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{
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InvocationMessage m => GetLastNonByteArrayArg(m.Arguments),
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StreamInvocationMessage m => GetLastNonByteArrayArg(m.Arguments),
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StreamItemMessage m => (m.Item, 0),
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CompletionMessage m => (m.Result, 0),
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_ => (null, -1)
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};
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private static (object? value, int index) GetLastNonByteArrayArg(object?[] args)
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{
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for (var i = args.Length - 1; i >= 0; i--)
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{
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if (args[i] != null && args[i] is not byte[])
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return (args[i], i);
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}
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return (null, -1);
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}
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/// <summary>
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/// Writes a message using chunked protocol framing for AsyncSegment mode.
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/// CHUNK_START: standard SignalR framed message with INT32 -1 for the streamed arg.
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/// CHUNK_DATA: [201][UINT16 size][data] per chunk (written by AsyncPipeWriterOutput, zero-copy).
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/// CHUNK_END: [202] (1 byte, no data — all data already committed by output).
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/// </summary>
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private void WriteMessageChunked(HubMessage message, PipeWriter pipeWriter)
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{
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var (streamedArg, streamedArgIndex) = GetStreamedArg(message);
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if (_logger != null && _logger.IsEnabled(LogLevel.Debug))
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_logger.LogDebug("WriteMessageChunked {MessageType} streamedArgIndex={StreamedArgIndex} streamedArgType={StreamedArgType}",
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message.GetType().Name, streamedArgIndex, streamedArg?.GetType().Name ?? "null");
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// --- CHUNK_START (standard SignalR message framing: [INT32 len][payload]) ---
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{
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var lengthSpan = pipeWriter.GetSpan(LengthPrefixSize);
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pipeWriter.Advance(LengthPrefixSize);
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var bw = new BufferWriterBinaryOutput(pipeWriter, _options.BufferWriterChunkSize);
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var externalBytes = 0;
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bw.WriteByte(MsgAsyncChunkStart);
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// Write original message body with INT32 -1 for the streamed arg
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switch (message)
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{
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case InvocationMessage m:
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bw.WriteByte(MsgInvocation);
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WriteNullableString(ref bw, m.InvocationId);
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bw.WriteStringUtf8(m.Target);
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WriteArgumentsChunked(ref bw, pipeWriter, m.Arguments, streamedArgIndex, ref externalBytes);
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WriteStringArray(ref bw, m.StreamIds);
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WriteHeaders(ref bw, m.Headers);
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break;
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case StreamInvocationMessage m:
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bw.WriteByte(MsgStreamInvocation);
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bw.WriteStringUtf8(m.InvocationId!);
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bw.WriteStringUtf8(m.Target);
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WriteArgumentsChunked(ref bw, pipeWriter, m.Arguments, streamedArgIndex, ref externalBytes);
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WriteStringArray(ref bw, m.StreamIds);
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WriteHeaders(ref bw, m.Headers);
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break;
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case StreamItemMessage m:
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bw.WriteByte(MsgStreamItem);
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bw.WriteStringUtf8(m.InvocationId!);
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bw.WriteRaw(-1); // streamed arg marker
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WriteHeaders(ref bw, m.Headers);
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break;
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case CompletionMessage m:
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bw.WriteByte(MsgCompletion);
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bw.WriteStringUtf8(m.InvocationId!);
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WriteNullableString(ref bw, m.Error);
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bw.WriteByte(1); // hasResult = true
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bw.WriteRaw(-1); // streamed arg marker
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WriteHeaders(ref bw, m.Headers);
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break;
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}
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var totalPayload = bw.Position + externalBytes;
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bw.Flush();
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Unsafe.WriteUnaligned(ref lengthSpan[0], totalPayload);
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_logger?.LogDebug("WriteMessageChunked CHUNK_START written payloadSize={PayloadSize}", totalPayload);
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}
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SyncFlush(pipeWriter.FlushAsync());
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// --- CHUNK_DATA ([201][UINT16 size][data] per chunk, all committed by output) ---
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if (streamedArg != null)
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{
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var dataBytes = AcBinarySerializer.Serialize(streamedArg, pipeWriter, _options);
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_logger?.LogDebug("WriteMessageChunked CHUNK_DATA serialized dataBytes={DataBytes}", dataBytes);
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}
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// --- CHUNK_END [202] ---
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var endByte = pipeWriter.GetSpan(1);
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endByte[0] = MsgAsyncChunkEnd;
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pipeWriter.Advance(1);
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SyncFlush(pipeWriter.FlushAsync());
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_logger?.LogTrace("WriteMessageChunked CHUNK_END written");
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}
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/// <summary>
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/// Writes arguments for CHUNK_START: all args normally except the streamed one (INT32 -1 marker).
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/// </summary>
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private void WriteArgumentsChunked(ref BufferWriterBinaryOutput bw, IBufferWriter<byte> output,
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object?[] arguments, int streamedArgIndex, ref int externalBytes)
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{
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bw.WriteVarUInt((uint)arguments.Length);
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for (var i = 0; i < arguments.Length; i++)
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{
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if (i == streamedArgIndex)
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{
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bw.WriteRaw(-1); // streamed arg placeholder
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continue;
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}
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WriteArgument(ref bw, output, arguments[i], ref externalBytes);
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}
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}
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#endregion
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#region TryParseMessage
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public virtual bool TryParseMessage(ref ReadOnlySequence<byte> input, IInvocationBinder binder, [NotNullWhen(true)] out HubMessage? message)
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{
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message = null;
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// AsyncSegment chunk mode: non-standard framing (no INT32 length prefix)
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if (_chunkStates != null && _chunkStates.TryGetValue(binder, out var chunkState))
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{
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_logger?.LogTrace("TryParseMessage chunk mode active, inputLength={InputLength}", input.Length);
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return TryParseChunkData(ref input, chunkState, binder, out message);
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}
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// Normal path
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var reader = new SequenceReader<byte>(input);
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if (!reader.TryReadLittleEndian(out int payloadLength))
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return false;
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if (reader.Remaining < payloadLength)
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return false;
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_logger?.LogTrace("TryParseMessage parsing payloadLength={PayloadLength} inputLength={InputLength}", payloadLength, input.Length);
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message = ParseMessage(ref reader, payloadLength, binder);
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input = input.Slice(LengthPrefixSize + payloadLength);
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if (message != null)
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{
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if (_logger != null && _logger.IsEnabled(LogLevel.Debug))
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_logger.LogDebug("TryParseMessage parsed {MessageType}", message.GetType().Name);
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return true;
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}
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// CHUNK_START consumed but no message yet — chunk mode just activated.
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// Must try chunk data immediately; returning false here would cause SignalR
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// to call AdvanceTo(examined=end) and wait for new data, even though
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// CHUNK_DATA/CHUNK_END may already be in the remaining buffer.
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if (_chunkStates != null && _chunkStates.TryGetValue(binder, out chunkState))
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{
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_logger?.LogDebug("TryParseMessage CHUNK_START activated, fallthrough to TryParseChunkData remainingInput={RemainingInput}", input.Length);
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return TryParseChunkData(ref input, chunkState, binder, out message);
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}
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return false;
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}
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private HubMessage? ParseMessage(ref SequenceReader<byte> r, int payloadLength, IInvocationBinder binder)
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{
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if (payloadLength == 0)
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return null;
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// Mark end position so Parse* methods can check Remaining relative to payload
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var payloadEnd = r.Consumed + payloadLength;
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r.TryRead(out var msgType);
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return msgType switch
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{
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MsgInvocation => ParseInvocation(ref r, binder),
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MsgStreamInvocation => ParseStreamInvocation(ref r, binder),
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MsgStreamItem => ParseStreamItem(ref r, binder),
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MsgCompletion => ParseCompletion(ref r, binder),
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MsgCancelInvocation => ParseCancelInvocation(ref r),
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MsgPing => PingMessage.Instance,
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MsgClose => ParseClose(ref r),
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MsgAck => new AckMessage(ReadInt64(ref r)),
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MsgSequence => new SequenceMessage(ReadInt64(ref r)),
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MsgAsyncChunkStart => ParseAsyncChunkStart(ref r, binder),
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_ => null
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};
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}
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|
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/// <summary>
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/// Legacy diagnostic logger. Use ILogger via constructor instead.
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/// </summary>
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|
[Obsolete("Use ILogger via constructor parameter instead. This property will be removed in a future version.")]
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public static Action<string>? DiagnosticLogger { get; set; }
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|
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[Conditional("DEBUG")]
|
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private void LogDiagnostic(string message) => _logger?.LogDebug(message);
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|
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[Conditional("DEBUG")]
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private void LogReadSingleArgument(ReadOnlySequence<byte> argSlice, int argLength, Type targetType)
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{
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if (_logger == null || !_logger.IsEnabled(LogLevel.Debug)) return;
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var segmentCount = 0;
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foreach (var _ in argSlice) segmentCount++;
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_logger.LogDebug("[AcBinaryHubProtocol] ReadSingleArgument: argLength={ArgLength}, isSingleSegment={IsSingleSegment}, segments={SegmentCount}, type={TypeName}",
|
|
argLength, argSlice.IsSingleSegment, segmentCount, targetType.Name);
|
|
}
|
|
|
|
[Conditional("DEBUG")]
|
|
private void LogParseInvocation(string target, IReadOnlyList<Type> paramTypes, long remaining)
|
|
{
|
|
if (_logger == null || !_logger.IsEnabled(LogLevel.Debug)) return;
|
|
|
|
var typeNames = new string[paramTypes.Count];
|
|
for (var i = 0; i < paramTypes.Count; i++) typeNames[i] = paramTypes[i].Name;
|
|
|
|
_logger.LogDebug("[AcBinaryHubProtocol] ParseInvocation target='{Target}'; paramTypes.Count={ParamCount}; types=[{Types}]; remaining={Remaining}",
|
|
target, paramTypes.Count, string.Join(", ", typeNames), remaining);
|
|
}
|
|
|
|
private HubMessage ParseInvocation(ref SequenceReader<byte> r, IInvocationBinder binder)
|
|
{
|
|
var invocationId = ReadNullableString(ref r);
|
|
var target = ReadString(ref r);
|
|
var paramTypes = binder.GetParameterTypes(target);
|
|
|
|
LogParseInvocation(target, paramTypes, r.Remaining);
|
|
|
|
var args = ReadArguments(ref r, paramTypes);
|
|
var streamIds = ReadStringArray(ref r);
|
|
var headers = ReadHeaders(ref r);
|
|
|
|
var msg = streamIds is { Length: > 0 } ? new InvocationMessage(invocationId, target, args, streamIds) : ApplyInvocationId(new InvocationMessage(target, args), invocationId);
|
|
|
|
if (headers != null) SetHeaders(msg, headers);
|
|
return msg;
|
|
}
|
|
|
|
private HubMessage ParseStreamInvocation(ref SequenceReader<byte> r, IInvocationBinder binder)
|
|
{
|
|
var invocationId = ReadString(ref r);
|
|
var target = ReadString(ref r);
|
|
var paramTypes = binder.GetParameterTypes(target);
|
|
var args = ReadArguments(ref r, paramTypes);
|
|
var streamIds = ReadStringArray(ref r);
|
|
var headers = ReadHeaders(ref r);
|
|
|
|
var msg = new StreamInvocationMessage(invocationId, target, args, streamIds);
|
|
if (headers != null) SetHeaders(msg, headers);
|
|
|
|
return msg;
|
|
}
|
|
|
|
private HubMessage ParseStreamItem(ref SequenceReader<byte> r, IInvocationBinder binder)
|
|
{
|
|
var invocationId = ReadString(ref r);
|
|
var itemType = binder.GetStreamItemType(invocationId);
|
|
var item = ReadSingleArgument(ref r, itemType);
|
|
var headers = ReadHeaders(ref r);
|
|
|
|
var msg = new StreamItemMessage(invocationId, item);
|
|
if (headers != null) SetHeaders(msg, headers);
|
|
|
|
return msg;
|
|
}
|
|
|
|
private HubMessage ParseCompletion(ref SequenceReader<byte> r, IInvocationBinder binder)
|
|
{
|
|
var invocationId = ReadString(ref r);
|
|
var error = ReadNullableString(ref r);
|
|
|
|
r.TryRead(out var hasResultByte);
|
|
var hasResult = hasResultByte == 1;
|
|
|
|
object? result = null;
|
|
if (hasResult)
|
|
{
|
|
var resultType = binder.GetReturnType(invocationId);
|
|
result = ReadSingleArgument(ref r, resultType);
|
|
}
|
|
|
|
var headers = ReadHeaders(ref r);
|
|
|
|
CompletionMessage msg;
|
|
if (error != null) msg = CompletionMessage.WithError(invocationId, error);
|
|
else if (hasResult) msg = CompletionMessage.WithResult(invocationId, result);
|
|
else msg = CompletionMessage.Empty(invocationId);
|
|
|
|
if (headers != null) SetHeaders(msg, headers);
|
|
|
|
return msg;
|
|
}
|
|
|
|
private static HubMessage ParseCancelInvocation(ref SequenceReader<byte> r)
|
|
{
|
|
var invocationId = ReadString(ref r);
|
|
var headers = ReadHeaders(ref r);
|
|
|
|
var msg = new CancelInvocationMessage(invocationId);
|
|
if (headers != null) SetHeaders(msg, headers);
|
|
|
|
return msg;
|
|
}
|
|
|
|
private static HubMessage ParseClose(ref SequenceReader<byte> r)
|
|
{
|
|
var error = ReadNullableString(ref r);
|
|
r.TryRead(out var reconnectByte);
|
|
|
|
var allowReconnect = reconnectByte == 1;
|
|
return new CloseMessage(error, allowReconnect);
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region Chunked Protocol (AsyncSegment read)
|
|
|
|
/// <summary>
|
|
/// Processes CHUNK_DATA and CHUNK_END in chunk accumulation mode.
|
|
/// Called from TryParseMessage when an active AsyncChunkState exists for this connection.
|
|
/// Loops over all available chunks — critical because SignalR's while loop exits when
|
|
/// TryParseMessage returns false, and won't re-enter until new data arrives on the pipe.
|
|
/// </summary>
|
|
private bool TryParseChunkData(ref ReadOnlySequence<byte> input, AsyncChunkState state,
|
|
IInvocationBinder binder, [NotNullWhen(true)] out HubMessage? message)
|
|
{
|
|
message = null;
|
|
|
|
while (input.Length >= 1)
|
|
{
|
|
var firstByte = input.FirstSpan[0];
|
|
|
|
if (firstByte == MsgAsyncChunkData) // 201 — self-describing data chunk [201][UINT16 size][data]
|
|
{
|
|
// Need at least [201][UINT16]
|
|
if (input.Length < 3) return false;
|
|
|
|
// Read UINT16 chunk data size
|
|
var headerSlice = input.Slice(1, 2);
|
|
Span<byte> sizeBytes = stackalloc byte[2];
|
|
headerSlice.CopyTo(sizeBytes);
|
|
var chunkDataSize = System.Buffers.Binary.BinaryPrimitives.ReadUInt16LittleEndian(sizeBytes);
|
|
|
|
var totalNeeded = 3 + chunkDataSize; // header (3) + data
|
|
if (input.Length < totalNeeded) return false;
|
|
|
|
_logger?.LogTrace("TryParseChunkData [201] chunkDataSize={ChunkDataSize} inputLength={InputLength}", chunkDataSize, input.Length);
|
|
|
|
// Write chunk data to internal pipe for background deserialization
|
|
if (chunkDataSize > 0)
|
|
{
|
|
var dataSlice = input.Slice(3, chunkDataSize);
|
|
foreach (var segment in dataSlice)
|
|
state.InternalPipe.Writer.Write(segment.Span);
|
|
SyncFlush(state.InternalPipe.Writer.FlushAsync());
|
|
}
|
|
|
|
// Lazy start: begin background deserialization after first chunk is in the pipe.
|
|
// Must not start earlier — PipeReaderBinaryInput.ReadAsync needs data available.
|
|
if (state.DeserTask == null)
|
|
{
|
|
_logger?.LogDebug("TryParseChunkData starting background deserialization targetType={TargetType}", state.StreamedArgType.Name);
|
|
|
|
var pipeReader = state.InternalPipe.Reader;
|
|
var type = state.StreamedArgType;
|
|
var opts = _options;
|
|
|
|
state.DeserTask = Task.Run(() => (object?)AcBinaryDeserializer.Deserialize(pipeReader, type, opts));
|
|
}
|
|
|
|
input = input.Slice(totalNeeded);
|
|
continue; // try next chunk immediately
|
|
}
|
|
|
|
if (firstByte == MsgAsyncChunkEnd) // 202 — end signal (no data)
|
|
{
|
|
_logger?.LogDebug("TryParseChunkData [202] CHUNK_END — completing pipe");
|
|
|
|
// Signal end of data → background deser task completes
|
|
state.InternalPipe.Writer.Complete();
|
|
object? deserializedArg = null;
|
|
|
|
if (state.DeserTask != null)
|
|
{
|
|
deserializedArg = state.DeserTask.GetAwaiter().GetResult();
|
|
state.InternalPipe.Reader.Complete();
|
|
|
|
if (_logger!.IsEnabled(LogLevel.Debug)) _logger.LogDebug("TryParseChunkData deserialization complete resultType={ResultType}", deserializedArg?.GetType().Name ?? "null");
|
|
}
|
|
|
|
// Fill the placeholder in the stored message's args
|
|
FillStreamedArg(state, deserializedArg);
|
|
_chunkStates!.Remove(binder);
|
|
|
|
input = input.Slice(1); // consume the single [202] byte
|
|
message = state.PartialMessage;
|
|
|
|
return true;
|
|
}
|
|
|
|
// Unknown byte in chunk mode — break out (shouldn't happen)
|
|
_logger?.LogWarning("TryParseChunkData unknown byte {FirstByte} in chunk mode, breaking", firstByte);
|
|
break;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Parses CHUNK_START: reads original message (with -1 marker for streamed arg),
|
|
/// creates internal Pipe, starts background deserialization task, stores state.
|
|
/// Returns null to signal "consumed bytes, no complete message yet".
|
|
/// </summary>
|
|
private HubMessage? ParseAsyncChunkStart(ref SequenceReader<byte> r, IInvocationBinder binder)
|
|
{
|
|
r.TryRead(out var originalMsgType);
|
|
|
|
_logger?.LogDebug("ParseAsyncChunkStart innerMsgType={InnerMsgType}", originalMsgType);
|
|
|
|
// Parse the original message normally — -1 marker becomes StreamedArgPlaceholder in ReadArguments
|
|
var partialMessage = originalMsgType switch
|
|
{
|
|
MsgInvocation => ParseInvocation(ref r, binder),
|
|
MsgStreamInvocation => ParseStreamInvocation(ref r, binder),
|
|
MsgStreamItem => ParseStreamItem(ref r, binder),
|
|
MsgCompletion => ParseCompletion(ref r, binder),
|
|
_ => null
|
|
};
|
|
|
|
if (partialMessage == null) return null;
|
|
|
|
// Find the placeholder arg and its target type
|
|
var (args, streamedIndex, streamedType) = FindStreamedArgSlot(partialMessage, binder);
|
|
streamedType = ResolveStreamedArgType(streamedType);
|
|
|
|
_logger?.LogDebug("ParseAsyncChunkStart chunk mode activated streamedIndex={StreamedIndex} streamedType={StreamedType}",
|
|
streamedIndex, streamedType.Name);
|
|
|
|
var state = new AsyncChunkState
|
|
{
|
|
PartialMessage = partialMessage,
|
|
Args = args,
|
|
StreamedArgIndex = streamedIndex,
|
|
StreamedArgType = streamedType,
|
|
InternalPipe = new Pipe()
|
|
// DeserTask started lazily in TryParseChunkData after first chunk is written
|
|
};
|
|
|
|
_chunkStates!.AddOrUpdate(binder, state);
|
|
return null; // chunk mode activated, next TryParseMessage goes to TryParseChunkData
|
|
}
|
|
|
|
/// <summary>
|
|
/// Finds the StreamedArgPlaceholder in the parsed message's arguments and returns the args array,
|
|
/// placeholder index, and the target deserialization type.
|
|
/// </summary>
|
|
private static (object?[] args, int index, Type type) FindStreamedArgSlot(HubMessage message, IInvocationBinder binder)
|
|
{
|
|
switch (message)
|
|
{
|
|
case InvocationMessage inv:
|
|
{
|
|
var paramTypes = binder.GetParameterTypes(inv.Target);
|
|
for (var i = 0; i < inv.Arguments.Length; i++)
|
|
{
|
|
if (!ReferenceEquals(inv.Arguments[i], StreamedArgPlaceholder)) continue;
|
|
|
|
var type = i < paramTypes.Count ? paramTypes[i] : typeof(object);
|
|
return (inv.Arguments, i, type);
|
|
}
|
|
break;
|
|
}
|
|
case StreamInvocationMessage sinv:
|
|
{
|
|
var paramTypes = binder.GetParameterTypes(sinv.Target);
|
|
for (var i = 0; i < sinv.Arguments.Length; i++)
|
|
{
|
|
if (!ReferenceEquals(sinv.Arguments[i], StreamedArgPlaceholder)) continue;
|
|
|
|
var type = i < paramTypes.Count ? paramTypes[i] : typeof(object);
|
|
return (sinv.Arguments, i, type);
|
|
}
|
|
break;
|
|
}
|
|
case StreamItemMessage si:
|
|
{
|
|
if (ReferenceEquals(si.Item, StreamedArgPlaceholder))
|
|
{
|
|
// StreamItemMessage.Item is read-only, use a wrapper array
|
|
var args = new object?[] { si.Item };
|
|
var type = binder.GetStreamItemType(si.InvocationId!);
|
|
return (args, 0, type);
|
|
}
|
|
break;
|
|
}
|
|
case CompletionMessage comp:
|
|
{
|
|
if (comp.HasResult && ReferenceEquals(comp.Result, StreamedArgPlaceholder))
|
|
{
|
|
var args = new object?[] { comp.Result };
|
|
var type = binder.GetReturnType(comp.InvocationId!);
|
|
|
|
return (args, 0, type);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
return ([], -1, typeof(object));
|
|
}
|
|
|
|
/// <summary>
|
|
/// Replaces the StreamedArgPlaceholder with the deserialized value in the stored message.
|
|
/// </summary>
|
|
private static void FillStreamedArg(AsyncChunkState state, object? deserializedValue)
|
|
{
|
|
if (state.StreamedArgIndex < 0) return;
|
|
|
|
switch (state.PartialMessage)
|
|
{
|
|
case InvocationMessage inv:
|
|
inv.Arguments[state.StreamedArgIndex] = deserializedValue;
|
|
break;
|
|
case StreamInvocationMessage sinv:
|
|
sinv.Arguments[state.StreamedArgIndex] = deserializedValue;
|
|
break;
|
|
case StreamItemMessage:
|
|
// StreamItemMessage.Item has no public setter — need to create a new message
|
|
if (state.PartialMessage is StreamItemMessage si) state.PartialMessage = new StreamItemMessage(si.InvocationId!, deserializedValue);
|
|
break;
|
|
case CompletionMessage:
|
|
// CompletionMessage.Result has no public setter — need to create a new message
|
|
if (state.PartialMessage is CompletionMessage comp) state.PartialMessage = CompletionMessage.WithResult(comp.InvocationId!, deserializedValue);
|
|
break;
|
|
}
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region Argument Serialization
|
|
|
|
private void WriteArguments(ref BufferWriterBinaryOutput bw, IBufferWriter<byte> output, object?[] arguments, ref int externalBytes)
|
|
{
|
|
bw.WriteVarUInt((uint)arguments.Length);
|
|
|
|
for (var i = 0; i < arguments.Length; i++) WriteArgument(ref bw, output, arguments[i], ref externalBytes);
|
|
}
|
|
|
|
private void WriteArgument(ref BufferWriterBinaryOutput bw, IBufferWriter<byte> output, object? value, ref int externalBytes)
|
|
{
|
|
// byte[] fast-path: size known upfront, write entirely through BWO
|
|
if (value is byte[] byteArray)
|
|
{
|
|
var isAcBinary = byteArray.Length >= 2
|
|
&& byteArray[0] == AcBinarySerializerOptions.FormatVersion
|
|
&& (byteArray[1] & 0xF0) == BinaryTypeCode.HeaderFlagsBase;
|
|
|
|
if (isAcBinary)
|
|
{
|
|
// Already AcBinary-serialized: write raw length + bytes, no tag wrapper
|
|
bw.WriteRaw(byteArray.Length);
|
|
}
|
|
else
|
|
{
|
|
// Raw byte[] (image, file, etc.): tag + raw bytes, no VarUInt (argLength implies size)
|
|
bw.WriteRaw(1 + byteArray.Length);
|
|
bw.WriteByte(BinaryTypeCode.ByteArray);
|
|
}
|
|
|
|
bw.WriteBytes(byteArray);
|
|
return;
|
|
}
|
|
|
|
// Bytes mode: serialize to byte[], write through BWO (no FlushAndReset needed)
|
|
if (_protocolMode == BinaryProtocolMode.Bytes)
|
|
{
|
|
var serialized = AcBinarySerializer.Serialize(value, _options);
|
|
bw.WriteRaw(serialized.Length);
|
|
bw.WriteBytes(serialized);
|
|
|
|
return;
|
|
}
|
|
|
|
// Segment mode: serialize directly to the pipe via BufferWriterBinaryOutput
|
|
// (AsyncSegment goes through WriteMessageChunked, never reaches here)
|
|
bw.FlushAndReset();
|
|
|
|
// Reserve arg length prefix directly on the pipe
|
|
var argLenSpan = output.GetSpan(LengthPrefixSize);
|
|
output.Advance(LengthPrefixSize);
|
|
|
|
var argBytes = AcBinarySerializer.Serialize(value, output, _options);
|
|
|
|
Unsafe.WriteUnaligned(ref argLenSpan[0], argBytes);
|
|
externalBytes += LengthPrefixSize + argBytes;
|
|
}
|
|
|
|
private object?[] ReadArguments(ref SequenceReader<byte> r, IReadOnlyList<Type> paramTypes)
|
|
{
|
|
var count = (int)ReadVarUInt(ref r);
|
|
|
|
LogDiagnostic($"[AcBinaryHubProtocol] ReadArguments count={count}; remaining={r.Remaining}");
|
|
|
|
var args = new object?[count];
|
|
|
|
for (var i = 0; i < count; i++)
|
|
{
|
|
var targetType = i < paramTypes.Count ? paramTypes[i] : typeof(object);
|
|
|
|
LogDiagnostic($"[AcBinaryHubProtocol] arg[{i}] targetType={targetType.Name}; remaining={r.Remaining}");
|
|
|
|
args[i] = ReadSingleArgument(ref r, targetType);
|
|
OnArgumentRead(args[i], i);
|
|
}
|
|
|
|
return args;
|
|
}
|
|
|
|
protected virtual void OnArgumentRead(object? value, int index) { }
|
|
|
|
/// <summary>
|
|
/// Override to resolve typeof(object) to a concrete type (e.g., from SignalParams).
|
|
/// Called after FindStreamedArgSlot in chunked deserialization.
|
|
/// </summary>
|
|
protected virtual Type ResolveStreamedArgType(Type binderType) => binderType;
|
|
|
|
/// <summary>
|
|
/// Reads a length-prefixed argument and deserializes it from the pipe's backing buffer.
|
|
/// Zero-copy: SequenceReader slices the pipe's own memory, TryGetArray gives the backing byte[].
|
|
/// SignalDataType enables eager deserialization of response data to the server's actual type.
|
|
/// </summary>
|
|
protected virtual object? ReadSingleArgument(ref SequenceReader<byte> r, Type targetType)
|
|
{
|
|
r.TryReadLittleEndian(out int argLength);
|
|
if (argLength == 0) return null;
|
|
|
|
// AsyncSegment: streamed arg marker (INT32 -1) → placeholder for chunked deserialization
|
|
if (argLength == -1)
|
|
{
|
|
_logger?.LogTrace("ReadSingleArgument streamed arg marker (-1) → placeholder");
|
|
return StreamedArgPlaceholder;
|
|
}
|
|
|
|
// Null marker check
|
|
if (argLength == 1)
|
|
{
|
|
r.TryPeek(out var marker);
|
|
if (marker == 0) { r.Advance(1); return null; }
|
|
}
|
|
|
|
// Slice argument from pipe sequence — zero-copy reference
|
|
var argSlice = r.UnreadSequence.Slice(0, argLength);
|
|
r.Advance(argLength);
|
|
|
|
LogReadSingleArgument(argSlice, argLength, targetType);
|
|
|
|
// byte[] fast-path: first byte is BinaryTypeCode.ByteArray tag →
|
|
// strip tag, rest is raw payload. No VarUInt length (argLength implies size).
|
|
var argReader = new SequenceReader<byte>(argSlice);
|
|
if (argReader.TryPeek(out var tag) && tag == BinaryTypeCode.ByteArray)
|
|
{
|
|
return SequenceToByteArray(argSlice.Slice(1));
|
|
}
|
|
|
|
// Bytes mode: linearize to byte[] → ArrayBinaryInput (fastest deser, no segment overhead)
|
|
if (_protocolMode == BinaryProtocolMode.Bytes)
|
|
{
|
|
var bytes = SequenceToByteArray(argSlice);
|
|
return AcBinaryDeserializer.Deserialize(bytes, targetType, _options);
|
|
}
|
|
|
|
return DeserializeFromSequence(argSlice, targetType, _options);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Returns raw byte[] from the pipe sequence without any deserialization.
|
|
/// Zero-copy when single-segment (TryGetArray), copies only for rare multi-segment.
|
|
/// </summary>
|
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
protected static byte[] SequenceToByteArray(ReadOnlySequence<byte> data)
|
|
{
|
|
if (data.IsSingleSegment && MemoryMarshal.TryGetArray(data.First, out var seg) && seg.Offset == 0 && seg.Count == seg.Array!.Length)
|
|
return seg.Array;
|
|
|
|
return data.ToArray();
|
|
}
|
|
|
|
/// <summary>
|
|
/// Deserializes from a ReadOnlySequence via AcBinaryDeserializer.
|
|
/// Single-segment: zero-copy via ArrayBinaryInput. Multi-segment: SequenceBinaryInput (no copy).
|
|
/// </summary>
|
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
protected static object? DeserializeFromSequence(ReadOnlySequence<byte> data, Type targetType, AcBinarySerializerOptions options)
|
|
=> AcBinaryDeserializer.Deserialize(data, targetType, options);
|
|
|
|
#endregion
|
|
|
|
#region Write Framing Helpers
|
|
|
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
private static void WriteNullableString(ref BufferWriterBinaryOutput bw, string? value)
|
|
{
|
|
if (value == null)
|
|
{
|
|
bw.WriteByte(0);
|
|
return;
|
|
}
|
|
bw.WriteByte(1);
|
|
bw.WriteStringUtf8(value);
|
|
}
|
|
|
|
private static void WriteStringArray(ref BufferWriterBinaryOutput bw, string[]? array)
|
|
{
|
|
if (array == null || array.Length == 0)
|
|
{
|
|
bw.WriteVarUInt(0);
|
|
return;
|
|
}
|
|
bw.WriteVarUInt((uint)array.Length);
|
|
for (var i = 0; i < array.Length; i++)
|
|
bw.WriteStringUtf8(array[i]);
|
|
}
|
|
|
|
private static void WriteHeaders(ref BufferWriterBinaryOutput bw, IDictionary<string, string>? headers)
|
|
{
|
|
if (headers == null || headers.Count == 0)
|
|
{
|
|
bw.WriteVarUInt(0);
|
|
return;
|
|
}
|
|
bw.WriteVarUInt((uint)headers.Count);
|
|
foreach (var kv in headers)
|
|
{
|
|
bw.WriteStringUtf8(kv.Key);
|
|
bw.WriteStringUtf8(kv.Value);
|
|
}
|
|
}
|
|
|
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
private static int VarUIntSize(uint value)
|
|
{
|
|
if (value < 0x80) return 1;
|
|
if (value < 0x4000) return 2;
|
|
if (value < 0x200000) return 3;
|
|
if (value < 0x10000000) return 4;
|
|
return 5;
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region Sequence Read Helpers
|
|
|
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
private static long ReadInt64(ref SequenceReader<byte> r)
|
|
{
|
|
r.TryReadLittleEndian(out long v);
|
|
return v;
|
|
}
|
|
|
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
protected static uint ReadVarUInt(ref SequenceReader<byte> r)
|
|
{
|
|
uint value = 0;
|
|
var shift = 0;
|
|
while (r.TryRead(out var b))
|
|
{
|
|
value |= (uint)(b & 0x7F) << shift;
|
|
if ((b & 0x80) == 0)
|
|
return value;
|
|
shift += 7;
|
|
}
|
|
return value;
|
|
}
|
|
|
|
private static string ReadString(ref SequenceReader<byte> r)
|
|
{
|
|
var byteCount = (int)ReadVarUInt(ref r);
|
|
if (byteCount == 0)
|
|
return string.Empty;
|
|
|
|
r.TryReadExact(byteCount, out var bytes);
|
|
return bytes.IsSingleSegment
|
|
? Encoding.UTF8.GetString(bytes.FirstSpan)
|
|
: Encoding.UTF8.GetString(bytes.ToArray());
|
|
}
|
|
|
|
private static string? ReadNullableString(ref SequenceReader<byte> r)
|
|
{
|
|
r.TryRead(out var marker);
|
|
return marker == 0 ? null : ReadString(ref r);
|
|
}
|
|
|
|
private static string[]? ReadStringArray(ref SequenceReader<byte> r)
|
|
{
|
|
var count = (int)ReadVarUInt(ref r);
|
|
if (count == 0)
|
|
return null;
|
|
|
|
var array = new string[count];
|
|
for (var i = 0; i < count; i++)
|
|
array[i] = ReadString(ref r);
|
|
return array;
|
|
}
|
|
|
|
private static Dictionary<string, string>? ReadHeaders(ref SequenceReader<byte> r)
|
|
{
|
|
if (r.Remaining == 0)
|
|
return null;
|
|
|
|
var count = (int)ReadVarUInt(ref r);
|
|
if (count == 0)
|
|
return null;
|
|
|
|
var headers = new Dictionary<string, string>(count, StringComparer.Ordinal);
|
|
for (var i = 0; i < count; i++)
|
|
{
|
|
var key = ReadString(ref r);
|
|
var value = ReadString(ref r);
|
|
headers[key] = value;
|
|
}
|
|
|
|
return headers;
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region Helpers
|
|
|
|
private static InvocationMessage ApplyInvocationId(InvocationMessage msg, string? invocationId)
|
|
{
|
|
if (invocationId != null)
|
|
return new InvocationMessage(invocationId, msg.Target, msg.Arguments);
|
|
return msg;
|
|
}
|
|
|
|
private static void SetHeaders(HubMessage msg, Dictionary<string, string> headers)
|
|
{
|
|
if (msg is HubInvocationMessage invMsg)
|
|
invMsg.Headers = headers;
|
|
}
|
|
|
|
#endregion
|
|
}
|