public async Task SendExecutionState(string sessionId, ExecutionStateDto state)
{
Logger.LogLine($"SignalRClientService: Dispatching ExecutionStateDto to client..");
try
{
await hubConnection.InvokeAsync(nameof(CodeHub.DispatchAppStateToClient), sessionId, state);
}
catch (Exception ex)
{
Logger.LogLine($"SignalRClientService.SendExecutionState: {ex.Message}");
}
}
public override void Write(string value)
{
var execState = new ExecutionStateDto
{
SessionId = sessionid,
State = RemoteAppState.WriteOutput,
Output = HttpUtility.HtmlEncode(value.ToString())
};
networkStream.WriteByte((byte)MessageType.WorkerExecutionState);
Serializer.SerializeWithLengthPrefix(networkStream, execState, PrefixStyle.Fixed32);
}
public override string ReadLine()
{
try
{
var execState = new ExecutionStateDto
{
SessionId = sessionid,
State = RemoteAppState.WaitForInputLine
};
networkStream.WriteByte((byte)MessageType.WorkerExecutionState);
Serializer.SerializeWithLengthPrefix(networkStream, execState, PrefixStyle.Fixed32);
Logger.LogLine($"CLIENT: sent remote inputline request (unfinished queue: {unfinishedRequests.Count})");
unfinishedRequests.Enqueue(execState);
isWaitingForInput = true;
while (isWaitingForInput)
{
if (client.Available > 0)
{
byte msgHeader = (byte)networkStream.ReadByte();
MessageType msgType = (MessageType)msgHeader;
unfinishedRequests.Dequeue();
isWaitingForInput = false;
if (msgType == MessageType.ServerRemoteInput)
{
var remoteInput = Serializer.DeserializeWithLengthPrefix <RemoteInputDto>(networkStream, PrefixStyle.Fixed32);
receivedInput = remoteInput.Input;
Logger.LogLine($"CLIENT: received remote input {receivedInput} of length {receivedInput.Length}");
}
else
{
Logger.LogLine($"CLIENT: expected msgtype {MessageType.ServerRemoteInput} but got {msgType}");
}
}
else
{
Thread.Sleep(100);
}
}
Logger.LogLine($"CLIENT: returning remote input \"{receivedInput}\" of length {receivedInput.Length} to execution flow");
return(receivedInput);
}
finally
{
receivedInput = null;
}
}
protected void Listener_WorkerExecutionState(TcpClient workerClient, ExecutionStateDto state)
{
var session = GetSession(state.SessionId);
if (session != null)
{
session.LastAppState = state.State;
if (session.LastAppState == RemoteAppState.Running)
{
session.Heartbeat(); //idle timer reset on start of user code execution
}
}
clientService.SendExecutionState(state.SessionId, state);
}
public void RunApplication(string sessionid, TcpClient client, byte[] assemblyBytes)
{
var networkStream = client.GetStream();
var outputRedirector = new ConsoleOutputService(sessionid, client);
var inputRedirector = new ConsoleInputService(sessionid, client);
ExecutionStateDto execState;
var assembly = Assembly.Load(assemblyBytes);
try
{
execState = new ExecutionStateDto
{
SessionId = sessionid,
State = RemoteAppState.Running
};
networkStream.WriteByte((byte)MessageType.WorkerExecutionState);
Serializer.SerializeWithLengthPrefix(networkStream, execState, PrefixStyle.Fixed32);
Logger.LogLine($"CLIENT: sent execution state {execState.State}");
//redirect console
Console.SetOut(outputRedirector);
Console.SetIn(inputRedirector);
//invoke main method
var mainParms = assembly.EntryPoint.GetParameters();
if (mainParms.Count() == 0)
{
assembly.EntryPoint.Invoke(null, null);
}
else
{
if (mainParms[0].ParameterType == typeof(string[]))
{
assembly.EntryPoint.Invoke(null, new string[] { null });
}
else
{
assembly.EntryPoint.Invoke(null, null);
}
}
//reset console redirection
Console.SetOut(new StreamWriter(Console.OpenStandardOutput())
{
AutoFlush = true
});
Console.SetIn(new StreamReader(Console.OpenStandardInput()));
execState = new ExecutionStateDto
{
SessionId = sessionid,
State = RemoteAppState.Ended
};
networkStream.WriteByte((byte)MessageType.WorkerExecutionState);
Serializer.SerializeWithLengthPrefix(networkStream, execState, PrefixStyle.Fixed32);
Logger.LogLine($"CLIENT: sent execution state {execState.State}");
}
catch (SocketException socketEx)
{
Logger.LogLine($"CLIENT Error: {socketEx.Message}");
}
catch (Exception ex)
{
execState = new ExecutionStateDto
{
SessionId = sessionid,
State = RemoteAppState.Crashed,
Exception = ExceptionDto.FromException(ex)
};
networkStream.WriteByte((byte)MessageType.WorkerExecutionState);
Serializer.SerializeWithLengthPrefix(networkStream, execState, PrefixStyle.Fixed32);
}
finally
{
}
}
/// <summary>
/// Should only be used from the server side
/// </summary>
/// <returns></returns>
public async Task DispatchAppStateToClient(string targetConnectionId, ExecutionStateDto state)
{
Logger.LogLine($"CodeHub: Sending Appstate to {targetConnectionId} -- {state.State}");
await Clients.Client(targetConnectionId).SendAsync("ApplicationStateChanged", state);
}
