public async Task <bool> Send([NotNull] byte[] data, CancellationToken token = default(CancellationToken))
{
if (_state != PipeState.Connected)
{
return(false);
}
OverlappingPipeServerStream stream = _stream;
if (stream == null)
{
return(false);
}
await stream.WriteAsync(data, token).ConfigureAwait(false);
return(true);
}
/// <summary>
/// Starts this instance.
/// </summary>
public void Start()
{
CancellationTokenSource cts = _cancellationTokenSource;
if (cts == null)
return;
CancellationToken token = cts.Token;
_serverTask = Task.Run(
async () =>
{
// The disconnect GUID can be set by a disconnect request if the client requests it.
Guid disconnectGuid = Guid.Empty;
// Create pipe access rule to allow everyone to connect - may want to change this later
try
{
// Create pipe stream.
using (OverlappingPipeServerStream stream = new OverlappingPipeServerStream(
_server.Name,
_server.MaximumConnections,
PipeTransmissionMode.Message,
InBufferSize,
OutBufferSize,
_server._pipeSecurity))
{
_state = PipeState.Open;
// Wait for connection
await stream.Connect(token).ConfigureAwait(false);
if (!token.IsCancellationRequested)
{
// Connect this connection to the service.
_connectionGuid = _server.Service.Connect(this);
if (_connectionGuid != Guid.Empty)
{
ConnectRequest connectRequest = null;
// Set the stream.
_stream = stream;
_server.Add();
_state = PipeState.AwaitingConnect;
try
{
// Keep going as long as we're connected.
while (stream.IsConnected &&
!token.IsCancellationRequested &&
_server.Service.State != ServiceControllerStatus.Stopped &&
_connectionGuid != Guid.Empty)
{
// Read data in.
byte[] data = await stream.ReadAsync(token).ConfigureAwait(false);
if (data == null ||
token.IsCancellationRequested ||
_server.Service.State == ServiceControllerStatus.Stopped ||
_connectionGuid == Guid.Empty)
break;
// Deserialize the incoming message.
Message message = Message.Deserialize(data);
Request request = message as Request;
// We only accept requests, anything else is a protocol error and so we must disconnect.
if (request == null)
break;
if (connectRequest == null)
{
// We require a connect request to start
connectRequest = request as ConnectRequest;
if (connectRequest == null)
break;
_state = PipeState.Connected;
_connectionDescription = connectRequest.Description;
Log.Add(
LoggingLevel.Notification,
() => ServiceResources.Not_NamedPipeConnection_Connection,
_connectionDescription);
await Send(
new ConnectResponse(request.ID, _server.Service.ServiceName),
token)
.ConfigureAwait(false);
continue;
}
CommandRequest commandRequest = request as CommandRequest;
if (commandRequest != null)
{
if (!string.IsNullOrWhiteSpace(commandRequest.CommandLine))
_commands.TryAdd(
commandRequest.ID,
new ConnectedCommand(
_connectionGuid,
_server.Service,
this,
commandRequest,
token));
continue;
}
CommandCancelRequest commandCancelRequest =
request as CommandCancelRequest;
if (commandCancelRequest != null)
{
ConnectedCommand cancelled;
if (_commands.TryRemove(
commandCancelRequest.CancelCommandId,
out cancelled))
// ReSharper disable once PossibleNullReferenceException
cancelled.Cancel(commandCancelRequest);
continue;
}
DisconnectRequest disconnectRequest = request as DisconnectRequest;
if (disconnectRequest != null)
{
// Set the guid for disconnect.
disconnectGuid = disconnectRequest.ID;
break;
}
}
}
catch (TaskCanceledException)
{
}
if (stream.IsConnected)
try
{
// Try to send disconnect response.
using (CancellationTokenSource dts = Constants.FireAndForgetTokenSource)
await Send(
new DisconnectResponse(disconnectGuid),
dts.Token)
.ConfigureAwait(false);
}
catch (TaskCanceledException)
{
}
}
}
// Remove the stream.
_stream = null;
_state = PipeState.Closed;
}
}
catch (TaskCanceledException)
{
// Don't log cancellation.
}
catch (IOException ioe)
{
if (!token.IsCancellationRequested)
// Common exception caused by sudden disconnect, lower level
Log.Add(
ioe,
LoggingLevel.Information,
() => ServiceResources.Err_NamedPipeConnection_Failed);
}
catch (Exception exception)
{
if (!token.IsCancellationRequested)
Log.Add(
exception,
LoggingLevel.Error,
() => ServiceResources.Err_NamedPipeConnection_Failed);
}
finally
{
Dispose();
}
},
token);
}
/// <summary>
/// Starts this instance.
/// </summary>
public void Start()
{
CancellationTokenSource cts = _cancellationTokenSource;
if (cts == null)
{
return;
}
CancellationToken token = cts.Token;
_serverTask = Task.Run(
async() =>
{
// The disconnect GUID can be set by a disconnect request if the client requests it.
Guid disconnectGuid = Guid.Empty;
// Create pipe access rule to allow everyone to connect - may want to change this later
try
{
// Create pipe stream.
using (OverlappingPipeServerStream stream = new OverlappingPipeServerStream(
_server.Name,
_server.MaximumConnections,
PipeTransmissionMode.Message,
InBufferSize,
OutBufferSize,
_server._pipeSecurity))
{
_state = PipeState.Open;
// Wait for connection
await stream.Connect(token).ConfigureAwait(false);
if (!token.IsCancellationRequested)
{
// Connect this connection to the service.
_connectionGuid = _server.Service.Connect(this);
if (_connectionGuid != Guid.Empty)
{
ConnectRequest connectRequest = null;
// Set the stream.
_stream = stream;
_server.Add();
_state = PipeState.AwaitingConnect;
try
{
// Keep going as long as we're connected.
while (stream.IsConnected &&
!token.IsCancellationRequested &&
_server.Service.State != ServiceControllerStatus.Stopped &&
_connectionGuid != Guid.Empty)
{
// Read data in.
byte[] data = await stream.ReadAsync(token).ConfigureAwait(false);
if (data == null ||
token.IsCancellationRequested ||
_server.Service.State == ServiceControllerStatus.Stopped ||
_connectionGuid == Guid.Empty)
{
break;
}
// Deserialize the incoming message.
Message message = Message.Deserialize(data);
Request request = message as Request;
// We only accept requests, anything else is a protocol error and so we must disconnect.
if (request == null)
{
break;
}
if (connectRequest == null)
{
// We require a connect request to start
connectRequest = request as ConnectRequest;
if (connectRequest == null)
{
break;
}
_state = PipeState.Connected;
_connectionDescription = connectRequest.Description;
Log.Add(
LoggingLevel.Notification,
() => ServiceResources.Not_NamedPipeConnection_Connection,
_connectionDescription);
await Send(
new ConnectResponse(request.ID, _server.Service.ServiceName),
token)
.ConfigureAwait(false);
continue;
}
CommandRequest commandRequest = request as CommandRequest;
if (commandRequest != null)
{
if (!string.IsNullOrWhiteSpace(commandRequest.CommandLine))
{
_commands.TryAdd(
commandRequest.ID,
new ConnectedCommand(
_connectionGuid,
_server.Service,
this,
commandRequest,
token));
}
continue;
}
CommandCancelRequest commandCancelRequest =
request as CommandCancelRequest;
if (commandCancelRequest != null)
{
ConnectedCommand cancelled;
if (_commands.TryRemove(
commandCancelRequest.CancelCommandId,
out cancelled))
{
// ReSharper disable once PossibleNullReferenceException
cancelled.Cancel(commandCancelRequest);
}
continue;
}
DisconnectRequest disconnectRequest = request as DisconnectRequest;
if (disconnectRequest != null)
{
// Set the guid for disconnect.
disconnectGuid = disconnectRequest.ID;
break;
}
}
}
catch (TaskCanceledException)
{
}
if (stream.IsConnected)
{
try
{
// Try to send disconnect response.
using (CancellationTokenSource dts = Constants.FireAndForgetTokenSource)
await Send(
new DisconnectResponse(disconnectGuid),
dts.Token)
.ConfigureAwait(false);
}
catch (TaskCanceledException)
{
}
}
}
}
// Remove the stream.
_stream = null;
_state = PipeState.Closed;
}
}
catch (TaskCanceledException)
{
// Don't log cancellation.
}
catch (IOException ioe)
{
if (!token.IsCancellationRequested)
{
// Common exception caused by sudden disconnect, lower level
Log.Add(
ioe,
LoggingLevel.Information,
() => ServiceResources.Err_NamedPipeConnection_Failed);
}
}
catch (Exception exception)
{
if (!token.IsCancellationRequested)
{
Log.Add(
exception,
LoggingLevel.Error,
() => ServiceResources.Err_NamedPipeConnection_Failed);
}
}
finally
{
Dispose();
}
},
token);
}
