private async Task <IpcResponse> GetResponseAsync(IpcRequest request, CancellationToken cancellationToken)
{
using (Stream client = await ConnectToServerAsync(cancellationToken))
using (var writer = new IpcWriter(client, _serializer, leaveOpen: true))
using (var reader = new IpcReader(client, _serializer, leaveOpen: true))
{
// send request
await writer.WriteAsync(request, cancellationToken).ConfigureAwait(false);
// receive response
return(await reader.ReadIpcResponseAsync(cancellationToken).ConfigureAwait(false));
}
}
private async Task ProcessAsync(Stream server, CancellationToken stoppingToken)
{
if (stoppingToken.IsCancellationRequested)
{
return;
}
if (_options.StreamTranslator != null)
{
server = _options.StreamTranslator(server);
}
using (var writer = new IpcWriter(server, _options.Serializer, leaveOpen: true))
using (var reader = new IpcReader(server, _options.Serializer, leaveOpen: true))
using (IDisposable loggingScope = _logger.BeginScope(new Dictionary <string, object>
{
{ "threadId", Thread.CurrentThread.ManagedThreadId }
}))
{
try
{
IpcRequest request;
try
{
_logger.LogDebug($"Client connected, reading request...");
request = await reader.ReadIpcRequestAsync(stoppingToken).ConfigureAwait(false);
}
catch (IpcSerializationException ex)
{
throw new IpcFaultException(IpcStatus.BadRequest, "Failed to deserialize request.", ex);
}
stoppingToken.ThrowIfCancellationRequested();
IpcResponse response;
try
{
_logger.LogDebug($"Request received, invoking '{request.MethodName}'...");
using (IServiceScope scope = _serviceProvider.CreateScope())
{
response = await GetReponseAsync(request, scope).ConfigureAwait(false);
}
}
catch (Exception ex) when(!(ex is IpcException))
{
throw new IpcFaultException(IpcStatus.InternalServerError,
"Unexpected exception raised from user code", ex);
}
stoppingToken.ThrowIfCancellationRequested();
try
{
_logger.LogDebug($"Sending response...");
await writer.WriteAsync(response, stoppingToken).ConfigureAwait(false);
}
catch (IpcSerializationException ex)
{
throw new IpcFaultException(IpcStatus.InternalServerError,
"Failed to serialize response.", ex);
}
_logger.LogDebug($"Process finished.");
}
catch (IpcCommunicationException ex)
{
_logger.LogError(ex, "Communication error occurred.");
// if communication error occurred, client will probably not receive any response
}
catch (OperationCanceledException ex)
{
_logger.LogWarning(ex, "IPC request process cancelled");
IpcResponse response = _options.IncludeFailureDetailsInResponse
? IpcResponse.InternalServerError("IPC request process cancelled")
: IpcResponse.InternalServerError();
await writer.WriteAsync(response, stoppingToken).ConfigureAwait(false);
}
catch (IpcFaultException ex)
{
_logger.LogError(ex, "Failed to process IPC request.");
IpcResponse response;
switch (ex.Status)
{
case IpcStatus.BadRequest:
response = _options.IncludeFailureDetailsInResponse
? IpcResponse.BadRequest(ex.Message, ex.InnerException)
: IpcResponse.BadRequest();
break;
default:
response = _options.IncludeFailureDetailsInResponse
? IpcResponse.InternalServerError(ex.Message, ex.InnerException)
: IpcResponse.InternalServerError();
break;
}
await writer.WriteAsync(response, stoppingToken).ConfigureAwait(false);
}
}
}
private async Task ProcessAsync(Stream server, string clientIdentifier, CancellationToken stoppingToken)
{
if (stoppingToken.IsCancellationRequested)
{
return;
}
if (_options.StreamTranslator != null)
{
server = _options.StreamTranslator(server);
}
using (var writer = new IpcWriter(server, _options.Serializer, leaveOpen: true))
using (var reader = new IpcReader(server, _options.Serializer, leaveOpen: true))
using (IDisposable loggingScope = _logger.BeginScope(new Dictionary <string, object>
{
{ "threadId", Thread.CurrentThread.ManagedThreadId }
}))
{
try
{
IpcRequest request;
try
{
// Log first connection if loglevel >= information.
// Log every connection if loglevel <= debug.
string message = $"Client connected from {clientIdentifier}.";
if (Logger.IsEnabled(LogLevel.Debug))
{
Logger.LogDebug(message);
}
else if (!_knownConections.ContainsKey(clientIdentifier))
{
Logger.LogInformation(message);
_knownConections[clientIdentifier] = true;
}
request = await reader.ReadIpcRequestAsync(stoppingToken).ConfigureAwait(false);
}
catch (IpcSerializationException ex)
{
throw new IpcFaultException(IpcStatus.BadRequest, "Failed to deserialize request.", ex);
}
stoppingToken.ThrowIfCancellationRequested();
IpcResponse response;
try
{
string parameters = (request.Parameters == null) ? "None" : string.Join(",", request.Parameters);
var paramTypes = (request.ParameterTypesByName == null) ? ((request.ParameterTypes == null) ? "None" : string.Join(", ", request.ParameterTypes)) : string.Join(", ", request.ParameterTypesByName.Select(x => x.ParameterType));
_logger.LogDebug($"Request received, invoking '{request.MethodName}' Params '{parameters}' Types '{paramTypes}'...");
using (IServiceScope scope = _serviceProvider.CreateScope())
{
response = await GetReponseAsync(request, scope).ConfigureAwait(false);
}
}
catch (Exception ex) when(!(ex is IpcException))
{
throw new IpcFaultException(IpcStatus.InternalServerError,
"Unexpected exception raised from user code", ex);
}
stoppingToken.ThrowIfCancellationRequested();
try
{
_logger.LogTrace($"Sending response for '{request.MethodName}'...");
await writer.WriteAsync(response, stoppingToken).ConfigureAwait(false);
}
catch (IpcSerializationException ex)
{
throw new IpcFaultException(IpcStatus.InternalServerError,
"Failed to serialize response.", ex);
}
_logger.LogTrace($"Process finished for '{request.MethodName}'.");
}
catch (IpcCommunicationException ex)
{
_logger.LogError(ex, "Communication error occurred.");
// if communication error occurred, client will probably not receive any response
}
catch (OperationCanceledException ex)
{
_logger.LogWarning(ex, "IPC request process cancelled");
IpcResponse response = _options.IncludeFailureDetailsInResponse
? IpcResponse.InternalServerError("IPC request process cancelled")
: IpcResponse.InternalServerError();
await writer.WriteAsync(response, stoppingToken).ConfigureAwait(false);
}
catch (IpcFaultException ex)
{
if (ex.Status != IpcStatus.InternalServerError || _options.LogInternalServerErrors)
{
_logger.LogError(ex, "Failed to process IPC request.");
}
IpcResponse response;
switch (ex.Status)
{
case IpcStatus.BadRequest:
response = _options.IncludeFailureDetailsInResponse
? IpcResponse.BadRequest(ex.Message, ex.InnerException)
: IpcResponse.BadRequest();
break;
default:
response = _options.IncludeFailureDetailsInResponse
? IpcResponse.InternalServerError(ex.Message, ex.InnerException)
: IpcResponse.InternalServerError();
break;
}
await writer.WriteAsync(response, stoppingToken).ConfigureAwait(false);
}
}
}