private void _onReadCallback(IAsyncResult pAsyncResult)
{
lock (__lock)
{
if (this.IsDisconnected())
{
return;
}
try
{
int numberOfBytesRead = _networkStream.EndRead(pAsyncResult);
if (numberOfBytesRead == 0)
{
_onConnectError(new Exception("Disconnected by server!"));
}
else
{
__nBytesReceived += numberOfBytesRead;
/// Test nagle....
/// if (__nByteReceived <= 50) return;
while (__nBytesReceived >= MsgBase.HEAD_LENGTH)
{
if (__bIsReceivingHeader)
{
__bIsReceivingHeader = false;
__nMsgLength = ByteUtils.Byte2Short(__receiveBuffer, 0);
if (__nMsgLength == 0)
{
throw new Exception("Message length is zero!!!");
}
Debugger.Assert(__nMsgLength <= RECEIVE_BUFFER_SIZE);
}
if (__nBytesReceived >= __nMsgLength)
{
_processMessageData();
__bIsReceivingHeader = true;
/// Copy remain bytes to buffer beginning.
///... Reserves a second buffer to optimize performance!!! (Array.Copy will allocate temp buffer each time if buffer overlapped).
int nRemainByteCount = __nBytesReceived - __nMsgLength;
Array.Copy(__receiveBuffer, __nMsgLength, __receiveBuffer, 0, nRemainByteCount);
__nBytesReceived = nRemainByteCount;
__nMsgLength = 0;
}
else if (__nBytesReceived < __nMsgLength)
{
break;
}
}
/// Try to read following data
_networkStream.BeginRead(__receiveBuffer, __nBytesReceived, RECEIVE_BUFFER_SIZE - __nBytesReceived
, _onReadCallback, 0);
}
}
catch (Exception e) { _onConnectError(e); }
}
}
