private async Task <bool> OpenHandshake()
{
bool handshakeResult = false;
try
{
int terminatorIndex = -1;
while (!WebSocketHelpers.FindHeaderTerminator(_receiveBuffer, _receiveBufferOffset, out terminatorIndex))
{
int receiveCount = await _stream.ReadAsync(_receiveBuffer, _receiveBufferOffset, _receiveBuffer.Length - _receiveBufferOffset);
if (receiveCount == 0)
{
throw new WebSocketHandshakeException(string.Format(
"Handshake with remote [{0}] failed due to receive zero bytes.", RemoteEndPoint));
}
BufferDeflector.ReplaceBuffer(_bufferManager, ref _receiveBuffer, ref _receiveBufferOffset, receiveCount);
if (_receiveBufferOffset > 2048)
{
throw new WebSocketHandshakeException(string.Format(
"Handshake with remote [{0}] failed due to receive weird stream.", RemoteEndPoint));
}
}
string secWebSocketKey = string.Empty;
string path = string.Empty;
string query = string.Empty;
handshakeResult = WebSocketServerHandshaker.HandleOpenningHandshakeRequest(this,
_receiveBuffer, 0, terminatorIndex + Consts.HeaderTerminator.Length,
out secWebSocketKey, out path, out query);
_module = _routeResolver.Resolve(path, query);
if (_module == null)
{
throw new WebSocketHandshakeException(string.Format(
"Handshake with remote [{0}] failed due to cannot identify the resource name [{1}{2}].", RemoteEndPoint, path, query));
}
if (handshakeResult)
{
var responseBuffer = WebSocketServerHandshaker.CreateOpenningHandshakeResponse(this, secWebSocketKey);
await _stream.WriteAsync(responseBuffer, 0, responseBuffer.Length);
}
BufferDeflector.ShiftBuffer(_bufferManager, terminatorIndex + Consts.HeaderTerminator.Length, ref _receiveBuffer, ref _receiveBufferOffset);
}
catch (ArgumentOutOfRangeException)
{
handshakeResult = false;
}
catch (WebSocketHandshakeException ex)
{
_log.Error(string.Format("Session [{0}] exception occurred, [{1}].", this, ex.Message), ex);
handshakeResult = false;
}
return(handshakeResult);
}
private bool OpenHandshake()
{
bool handshakeResult = false;
try
{
var requestBuffer = WebSocketClientHandshaker.CreateOpenningHandshakeRequest(this, out _secWebSocketKey);
var ar = _stream.BeginWrite(requestBuffer, 0, requestBuffer.Length, null, _stream);
if (!ar.AsyncWaitHandle.WaitOne(ConnectTimeout))
{
Close(WebSocketCloseCode.ProtocolError, "Opening handshake timeout.");
throw new TimeoutException(string.Format(
"Handshake with remote [{0}] timeout [{1}].", RemoteEndPoint, ConnectTimeout));
}
_stream.EndWrite(ar);
int terminatorIndex = -1;
while (!WebSocketHelpers.FindHttpMessageTerminator(_receiveBuffer, _receiveBufferOffset, out terminatorIndex))
{
ar = _stream.BeginRead(_receiveBuffer, _receiveBufferOffset, _receiveBuffer.Length - _receiveBufferOffset, null, _stream);
if (!ar.AsyncWaitHandle.WaitOne(ConnectTimeout))
{
Close(WebSocketCloseCode.ProtocolError, "Opening handshake timeout.");
throw new TimeoutException(string.Format(
"Handshake with remote [{0}] timeout [{1}].", RemoteEndPoint, ConnectTimeout));
}
int receiveCount = _stream.EndRead(ar);
if (receiveCount == 0)
{
throw new WebSocketHandshakeException(string.Format(
"Handshake with remote [{0}] failed due to receive zero bytes.", RemoteEndPoint));
}
BufferDeflector.ReplaceBuffer(_bufferManager, ref _receiveBuffer, ref _receiveBufferOffset, receiveCount);
if (_receiveBufferOffset > 2048)
{
throw new WebSocketHandshakeException(string.Format(
"Handshake with remote [{0}] failed due to receive weird stream.", RemoteEndPoint));
}
}
handshakeResult = WebSocketClientHandshaker.VerifyOpenningHandshakeResponse(this, _receiveBuffer, 0, terminatorIndex + Consts.HttpMessageTerminator.Length, _secWebSocketKey);
BufferDeflector.ShiftBuffer(_bufferManager, terminatorIndex + Consts.HttpMessageTerminator.Length, ref _receiveBuffer, ref _receiveBufferOffset);
}
catch (ArgumentOutOfRangeException)
{
handshakeResult = false;
}
catch (WebSocketHandshakeException ex)
{
_log(ex.Message);
handshakeResult = false;
}
return(handshakeResult);
}