/// <summary>
/// 尝试进行解包
/// </summary>
/// <param name="ex">解包发生的异常</param>
/// <returns>解包的数据</returns>
private object Decode(out Exception ex)
{
var data = new byte[packetLength];
stream.Seek(0, SeekOrigin.Begin);
var read = stream.Read(data, 0, data.Length);
if (read < stream.Length)
{
var migrateData = new byte[stream.Length - read];
stream.Read(migrateData, 0, migrateData.Length);
Reset();
stream.Write(migrateData, 0, migrateData.Length);
}
else
{
Reset();
}
var packet = packer.Decode(data, out ex);
return(ex != null ? null : packet);
}