protected override void BeginRequest(NetworkRequestArgs eventArgs)
{
var asyncContinuation = eventArgs.AsyncContinuation;
var bytes = eventArgs.RequestBuffer;
var offset = eventArgs.RequestBufferOffset;
var length = eventArgs.RequestBufferLength;
var webRequest = HttpRequestFactory.CreateWebRequest(_addressUri);
webRequest.Method = "POST";
AsyncCallback onResponse =
r =>
{
try
{
using (var response = webRequest.EndGetResponse(r))
{
// Response successfully read
}
// completed fine
base.EndRequest(asyncContinuation, null);
}
catch (Exception ex)
{
if (ex.MustBeRethrownImmediately())
{
throw; // Throwing exceptions here will crash the entire application (.NET 2.0 behavior)
}
base.EndRequest(_ => asyncContinuation(ex), null); // pendingException = null to keep sender alive
}
};
AsyncCallback onRequestStream =
r =>
{
try
{
using (var stream = webRequest.EndGetRequestStream(r))
{
stream.Write(bytes, offset, length);
}
webRequest.BeginGetResponse(onResponse, null);
}
catch (Exception ex)
{
if (ex.MustBeRethrownImmediately())
{
throw; // Throwing exceptions here will crash the entire application (.NET 2.0 behavior)
}
base.EndRequest(_ => asyncContinuation(ex), null); // pendingException = null to keep sender alive
}
};
webRequest.BeginGetRequestStream(onRequestStream, null);
}
protected override void BeginRequest(NetworkRequestArgs eventArgs)
{
var args = new MySocketAsyncEventArgs();
args.SetBuffer(eventArgs.RequestBuffer, eventArgs.RequestBufferOffset, eventArgs.RequestBufferLength);
args.UserToken = eventArgs.AsyncContinuation;
args.Completed += _socketOperationCompleted;
bool asyncOperation = false;
try
{
asyncOperation = _socket.SendAsync(args);
}
catch (SocketException ex)
{
InternalLogger.Error(ex, "NetworkTarget: Error sending tcp request");
args.SocketError = ex.SocketErrorCode;
}
catch (Exception ex)
{
InternalLogger.Error(ex, "NetworkTarget: Error sending tcp request");
if (ex.InnerException is SocketException socketException)
{
args.SocketError = socketException.SocketErrorCode;
}
else
{
args.SocketError = SocketError.OperationAborted;
}
}
if (!asyncOperation)
{
SocketOperationCompleted(_socket, args);
}
}
/// <summary>
/// Actually sends the given text over the specified protocol.
/// </summary>
/// <param name="bytes">The bytes to be sent.</param>
/// <param name="offset">Offset in buffer.</param>
/// <param name="length">Number of bytes to send.</param>
/// <param name="asyncContinuation">The async continuation to be invoked after the buffer has been sent.</param>
/// <remarks>To be overridden in inheriting classes.</remarks>
protected override void DoSend(byte[] bytes, int offset, int length, AsyncContinuation asyncContinuation)
{
NetworkRequestArgs eventArgs = new NetworkRequestArgs(bytes, offset, length, asyncContinuation);
lock (_pendingRequests)
{
if (MaxQueueSize > 0 && _pendingRequests.Count >= MaxQueueSize)
{
var dequeued = _pendingRequests.Dequeue();
dequeued.AsyncContinuation?.Invoke(null);
}
if (!_asyncOperationInProgress && _pendingError == null)
{
_asyncOperationInProgress = true;
BeginRequest(eventArgs);
return;
}
_pendingRequests.Enqueue(eventArgs);
}
ProcessNextQueuedItem();
}
protected abstract void BeginRequest(NetworkRequestArgs eventArgs);