private async Task ReadPipeAsync(JT1078TcpSession session, PipeReader reader)
{
FixedHeaderInfo fixedHeaderInfo = new FixedHeaderInfo();
while (true)
{
ReadResult result = await reader.ReadAsync();
if (result.IsCompleted)
{
break;
}
ReadOnlySequence <byte> buffer = result.Buffer;
SequencePosition consumed = buffer.Start;
SequencePosition examined = buffer.End;
try
{
if (result.IsCanceled)
{
break;
}
if (buffer.Length > 0)
{
ReaderBuffer(ref buffer, fixedHeaderInfo, session, out consumed, out examined);
}
}
#pragma warning disable CA1031 // Do not catch general exception types
catch (Exception ex)
{
Logger.LogError(ex, $"[ReadPipe Error]:{session.Client.RemoteEndPoint}");
break;
}
#pragma warning restore CA1031 // Do not catch general exception types
finally
{
reader.AdvanceTo(consumed, examined);
}
}
reader.Complete();
}
private void ReaderBuffer(ref ReadOnlySequence <byte> buffer, FixedHeaderInfo fixedHeaderInfo, JT1078TcpSession session, out SequencePosition consumed, out SequencePosition examined)
{
consumed = buffer.Start;
examined = buffer.End;
SequenceReader <byte> seqReader = new SequenceReader <byte>(buffer);
long totalConsumed = 0;
while (!seqReader.End)
{
if (seqReader.Length < 30)
{
fixedHeaderInfo.Reset();
break;
}
if (!fixedHeaderInfo.FoundHeader)
{
var header = seqReader.Sequence.Slice(0, 4);
uint headerValue = BinaryPrimitives.ReadUInt32BigEndian(header.ToArray());
if (JT1078Package.FH == headerValue)
{
//sim
if (string.IsNullOrEmpty(fixedHeaderInfo.SIM))
{
fixedHeaderInfo.SIM = ReadBCD(seqReader.Sequence.Slice(8, 6).ToArray(), 12);
fixedHeaderInfo.SIM = fixedHeaderInfo.SIM ?? session.SessionID;
}
//根据数据类型处理对应的数据长度
fixedHeaderInfo.TotalSize += 15;
var dataType = seqReader.Sequence.Slice(fixedHeaderInfo.TotalSize, 1).FirstSpan[0];
fixedHeaderInfo.TotalSize += 1;
int bodyLength = GetRealDataBodyLength(dataType);
fixedHeaderInfo.TotalSize += bodyLength;
var bodyLengthFirstSpan = seqReader.Sequence.Slice(fixedHeaderInfo.TotalSize, 2).ToArray();
fixedHeaderInfo.TotalSize += 2;
//数据体长度
bodyLength = BinaryPrimitives.ReadUInt16BigEndian(bodyLengthFirstSpan);
if (bodyLength < 0)
{
fixedHeaderInfo.Reset();
throw new ArgumentException("jt1078 package body length Error.");
}
if (bodyLength == 0)//数据体长度为0
{
var package1 = seqReader.Sequence.Slice(0, fixedHeaderInfo.TotalSize).ToArray();
seqReader.Advance(fixedHeaderInfo.TotalSize);
if (LogLogger.IsEnabled(LogLevel.Trace))
{
LogLogger.LogTrace($"{package1.ToHexString()}");
}
try
{
SessionManager.TryLink(fixedHeaderInfo.SIM, session);
jT1078MsgProducer.ProduceAsync(fixedHeaderInfo.SIM, package1.ToArray());
}
catch (Exception ex)
{
LogLogger.LogError($"[Error Parse 1]:{package1.ToHexString()}");
Logger.LogError(ex, $"[Error Parse 1]:{package1.ToHexString()}");
}
finally
{
totalConsumed += seqReader.Consumed;
seqReader = new SequenceReader <byte>(seqReader.Sequence.Slice(fixedHeaderInfo.TotalSize));
fixedHeaderInfo.Reset();
#if DEBUG
Interlocked.Increment(ref Counter);
#endif
}
continue;
}
//数据体
fixedHeaderInfo.TotalSize += bodyLength;
fixedHeaderInfo.FoundHeader = true;
}
else
{
fixedHeaderInfo.Reset();
throw new ArgumentException("not JT1078 package.");
}
}
if ((seqReader.Length - fixedHeaderInfo.TotalSize) < 0)
{
break;
}
var package = seqReader.Sequence.Slice(0, fixedHeaderInfo.TotalSize).ToArray();
seqReader.Advance(fixedHeaderInfo.TotalSize);
if (LogLogger.IsEnabled(LogLevel.Trace))
{
LogLogger.LogTrace($"===>{package.ToHexString()}");
}
try
{
SessionManager.TryLink(fixedHeaderInfo.SIM, session);
jT1078MsgProducer.ProduceAsync(fixedHeaderInfo.SIM, package);
}
catch (Exception ex)
{
LogLogger.LogError($"[Error Parse 2]:{package.ToHexString()}");
Logger.LogError(ex, $"[Error Parse 2]:{package.ToHexString()}");
}
finally
{
totalConsumed += seqReader.Consumed;
seqReader = new SequenceReader <byte>(seqReader.Sequence.Slice(fixedHeaderInfo.TotalSize));
fixedHeaderInfo.Reset();
#if DEBUG
Interlocked.Increment(ref Counter);
#endif
}
#if DEBUG
if (Logger.IsEnabled(LogLevel.Trace))
{
Logger.LogTrace($"======>{Counter}");
}
#endif
}
if (seqReader.End)
{
examined = consumed = buffer.End;
}
else
{
consumed = buffer.GetPosition(totalConsumed);
}
}
