public FastCGIConnection(FastCGIServer owner, TcpSocket socket)
{
_owner = owner;
_receiveState = ReceiveState.Header;
_socket = socket;
_socket.NoDelay = true;
_socket.ReceiveBuffer(new ArraySegment <byte>(_headerBuffer));
_socket.OnData += OnData;
_socket.ReceiveStart();
}
private void OnData(TcpSocket sender, ArraySegment <byte> data)
{
switch (_receiveState)
{
case ReceiveState.Header:
if (_headerBuffer[0] != FCGI_VERSION_1)
{
_socket.Destroy();
return;
}
var contentLength = _headerBuffer[4] << 8 | _headerBuffer[5];
if (contentLength == 0)
{
data = new ArraySegment <byte>(BufferData.EmptyBytes);
goto case ReceiveState.Body;
}
else
{
_socket.ReceiveBuffer(new ArraySegment <byte>(new byte[contentLength]));
_receiveState = ReceiveState.Body;
}
break;
case ReceiveState.Body:
try {
var type = (RecordType)_headerBuffer[1];
var requestId = (_headerBuffer[2] << 8) | _headerBuffer[3];
OnRecordReceived(type, requestId, data);
}
catch {
_socket.Destroy();
_socket = null;
return;
}
_receiveSkip = _headerBuffer[6];
if (_receiveSkip > 0)
{
data = new ArraySegment <byte>();
_receiveState = ReceiveState.Padding;
goto case ReceiveState.Padding;
}
else
{
_receiveState = ReceiveState.Header;
_socket.ReceiveBuffer(new ArraySegment <byte>(_headerBuffer));
}
break;
case ReceiveState.Padding:
_receiveSkip -= data.Count;
if (_receiveSkip > 0)
{
var len = Math.Min(_headerBuffer.Length, _receiveSkip);
_socket.ReceiveBuffer(new ArraySegment <byte>(_headerBuffer, 0, len));
}
else
{
_receiveState = ReceiveState.Header;
_socket.ReceiveBuffer(new ArraySegment <byte>(_headerBuffer));
}
break;
}
}