// 接收数据主要是通过ReceiveHeader和ReceiveBody两个函数。
void ReceiveHeader(IAsyncResult ar)
{
try
{
// 返回网络上接收的数据长度
int read = socket.EndReceive(ar);
// 已断开连接
if (read < 1)
{
// 通知丢失连接
handler.OnLost(rPacket);
return;
}
rPacket.readLength += read;
// 消息头必须读满4个字节
if (rPacket.readLength < NetPacket.headerLength)
{
socket.BeginReceive(rPacket.bytes,
rPacket.readLength, // 存储偏移已读入的长度
NetPacket.headerLength - rPacket.readLength, // 这次只读入剩余的数据
SocketFlags.None,
new AsyncCallback(ReceiveHeader),
rPacket);
}
else
{
// 获得消息体长度
rPacket.DecodeHeader();
rPacket.readLength = 0;
// 开始读取消息体
socket.BeginReceive(rPacket.bytes,
NetPacket.headerLength,
rPacket.bodyLenght,
SocketFlags.None,
new AsyncCallback(ReceiveBody),
rPacket);
}
}
catch (Exception ex)
{
handler.OnError("ReceiveHeader", ex);
}
}
