private void OnRead(UvStreamHandle handle, int status)
{
if (status == 0)
{
// A zero status does not indicate an error or connection end. It indicates
// there is no data to be read right now.
// See the note at http://docs.libuv.org/en/v1.x/stream.html#c.uv_read_cb.
// We need to clean up whatever was allocated by OnAlloc.
SocketInput.IncomingDeferred();
return;
}
var normalRead = status > 0;
var normalDone = status == Constants.EOF;
var errorDone = !(normalDone || normalRead);
var readCount = normalRead ? status : 0;
if (normalRead)
{
Log.ConnectionRead(ConnectionId, readCount);
}
else
{
_socket.ReadStop();
if (normalDone)
{
Log.ConnectionReadFin(ConnectionId);
}
}
IOException error = null;
if (errorDone)
{
Exception uvError;
handle.Libuv.Check(status, out uvError);
// Log connection resets at a lower (Debug) level.
if (status == Constants.ECONNRESET)
{
Log.ConnectionReset(ConnectionId);
}
else
{
Log.ConnectionError(ConnectionId, uvError);
}
error = new IOException(uvError.Message, uvError);
}
SocketInput.IncomingComplete(readCount, error);
if (errorDone)
{
Abort(error);
}
}
void IConnectionControl.Resume()
{
if (_socket.IsClosed)
{
return;
}
Log.ConnectionResume(ConnectionId);
try
{
_socket.ReadStart(_allocCallback, _readCallback, this);
}
catch (UvException)
{
// ReadStart() can throw a UvException in some cases (e.g. socket is no longer connected).
// This should be treated the same as OnRead() seeing a "normalDone" condition.
Log.ConnectionReadFin(ConnectionId);
SocketInput.IncomingComplete(0, null);
}
}