static async Task ReadPipeAsync(PipeReader reader, CsvWriter csvWriter, Mapper mapper)
{
while (true)
{
var result = await reader.ReadAsync();
ReadOnlySequence <byte> buffer = result.Buffer;
while (TryReadCarUpdateDatagram(ref buffer, out var completeDatagram))
{
var carData = StructSerializer
.Deserialize <CarUpdateDatagram>(completeDatagram.ToArray(), 0);
var carModel = mapper.Map <CarStateModel>(carData);
csvWriter.NextRecord();
csvWriter.WriteRecord(carModel);
}
reader.AdvanceTo(buffer.Start, buffer.End);
if (result.IsCompleted)
{
break;
}
}
await reader.CompleteAsync();
}
protected override DataChunk Read(IFileReader dataReader)
{
long offset;
GzipChunkPrefix prefix;
DataChunk dataChunk = null;
lock (_locker)
{
if (_readOffset >= dataReader.Size)
{
return(null);
}
var prefixSize = StructSerializer.GetSize <GzipChunkPrefix>();
var prefixBytes = dataReader.ReadChunk(_readOffset, prefixSize);
prefix = StructSerializer.Deserialize <GzipChunkPrefix>(prefixBytes);
offset = _readOffset + prefixSize;
_readOffset = offset + prefix.GzipDataSize;
}
var decompressedData = new byte[prefix.ChunkSize];
var data = dataReader.ReadChunk(offset, prefix.GzipDataSize);
using (MemoryStream memoryStream = new MemoryStream(data))
{
using (GZipStream decompressionStream = new GZipStream(memoryStream, CompressionMode.Decompress, leaveOpen: true))
{
var decompressedDataSize = decompressionStream.Read(decompressedData, 0, prefix.ChunkSize);
if (decompressedDataSize != prefix.ChunkSize)
{
Console.WriteLine("The specified compressed file is malformed.");
}
}
dataChunk = new DataChunk(prefix.Offset, decompressedData);
}
return(dataChunk);
}
/// <summary> /// Convert the bytes to a structure in host-endian format (little-endian on PCs). /// To use with big-endian data, reverse all of the data bytes and create a struct that is in the reverse order of the data. /// </summary> /// <typeparam name="T">The structure's type</typeparam> /// <param name="source">The buffer.</param> /// <returns></returns> public static T ToStruct <T>([NotNull] this byte[] source) where T : struct => StructSerializer.Deserialize <T>(source.GetOrThrowIfNull(nameof(source)));
static async Task Main(string[] args)
{
// udp server configuration
var serverIpAddress = IPAddress.Parse("192.168.1.53");
var serverPort = 9996;
var serverEndpoint = new IPEndPoint(serverIpAddress, serverPort);
// automapper initialization for mapping interop Datagrams => Models
// NTS: Install-Package AutoMapper.Extensions.Microsoft.DependencyInjection
MapperConfiguration config = new MapperConfiguration(
cfg =>
{
cfg.CreateMap <HandshakeResponseDatagram, HandshakeResponseModel>();
cfg.CreateMap <CarUpdateDatagram, CarStateModel>();
}
);
var mapper = new Mapper(config);
var handshakeRequest = new TelemetryServerConfigurationDatagram()
{
identifier = PlatformType.Web,
version = 1,
operationId = OperationType.Handshake
};
// serialize request
var requestByteArray = StructSerializer.Serialize(handshakeRequest);
// send request and block for response
using var client = new UdpClient();
client.Connect(serverEndpoint);
client.Send(requestByteArray, Marshal.SizeOf(typeof(TelemetryServerConfigurationDatagram)));
var responseByteArray = client.Receive(ref serverEndpoint);
// deserialize and map to model
var handshakeResponse = StructSerializer.Deserialize <HandshakeResponseDatagram>(responseByteArray, 0);
var handshakeOutput = mapper.Map <HandshakeResponseModel>(handshakeResponse);
// print result of handshake
Console.WriteLine(handshakeOutput);
var updateRequest = new TelemetryServerConfigurationDatagram()
{
identifier = PlatformType.Web,
operationId = OperationType.SubscriberUpdate,
version = 1
};
requestByteArray = StructSerializer.Serialize(updateRequest);
await client.SendAsync(requestByteArray, Marshal.SizeOf(typeof(TelemetryServerConfigurationDatagram)));
var path = $"telemetry/" +
$"{handshakeOutput.DriverName}/" +
$"{handshakeOutput.TrackName}/" +
$"{handshakeOutput.CarName}/";
if (!Directory.Exists(path))
{
Directory.CreateDirectory(path);
}
using var streamWriter = new StreamWriter($"{path}/{DateTime.Now.ToFileTime()}.csv");
using var csvWriter = new CsvWriter(streamWriter, CultureInfo.InvariantCulture);
csvWriter.WriteHeader(typeof(CarStateModel));
Console.CancelKeyPress += (sender, e) =>
{
csvWriter.Flush();
streamWriter.Close();
csvWriter.Dispose();
streamWriter.Dispose();
var disconnect = new TelemetryServerConfigurationDatagram()
{
identifier = PlatformType.Web,
operationId = OperationType.Dismiss,
version = 1
};
requestByteArray = StructSerializer.Serialize(disconnect);
client.Send(requestByteArray, Marshal.SizeOf(typeof(TelemetryServerConfigurationDatagram)));
Console.WriteLine("Exiting Gracefully...");
Environment.Exit(0);
};
await ProcessSubscriberUpdates(client, csvWriter, mapper);
}