/// <summary>
/// 此方法在异步接收操作完成时调用。
/// </summary>
/// <param name="e"></param>
private void ProcessReceive(SocketAsyncEventArgs e)
{
AsyncUserToken userToken = e.UserToken as AsyncUserToken;
if (userToken.Socket == null)
{
return;
}
userToken.ActiveDateTime = DateTime.Now;
//检查远程主机是否关闭了连接
if (e.BytesTransferred > 0 && e.SocketError == SocketError.Success)
{
int offset = e.Offset;
int count = e.BytesTransferred;
byte[] data = new byte[count];
for (int i = offset; i < count; i++)
{
data[i] = e.Buffer[i];
}
//触发接收数据事件
ClientReceiveData?.Invoke(userToken, data);
//继续异步接收
bool willRaiseEvent = userToken.Socket.ReceiveAsync(userToken.RecvEventArgs);
if (!willRaiseEvent)
{
ProcessReceive(userToken.RecvEventArgs);
}
}
else
{
userToken.AsyncClose();
}
}
/// <summary>
/// 异步发送回调函数
/// </summary>
/// <param name="asyncEventArgs"></param>
private ResMsg ProcessSend(SocketAsyncEventArgs sendEventArgs)
{
AsyncUserToken userToken = sendEventArgs.UserToken as AsyncUserToken;
userToken.ActiveDateTime = DateTime.Now;
if (sendEventArgs.SocketError == SocketError.Success)
{
//发送成功，检查缓存中是否还有数据没有发送,有就继续发送
byte[] data;
if (userToken.SendBuffer.TryDequeue(out data) && data != null)
{
userToken.m_sendAsync = true;
return(SendAsyncEvent(userToken, data, 0, data.Length));
}
userToken.m_sendAsync = false;
return(new ResMsg(true, ""));
}
else
{
userToken.AsyncClose();
return(new ResMsg(false, "连接已关闭"));
}
}