/// <summary>
/// 读取消息头，如果有Gzip压缩时自动解压字节流
/// </summary>
/// <returns></returns>
/// <exception cref="OverflowException"></exception>
public MessageHead ReadHeadGzip()
{
try
{
MessageHead head = new MessageHead();
head.HasGzip = true;
head.PacketLength = Length;
if (CheckGzipBuffer())
{
byte[] gzipData = PopBuffer();
head.GzipLength = gzipData.Length;
//gzip格式500+gzip( 1000+ XXXXXX)
byte[] deZipData = GzipUtils.DeCompress(gzipData, 0, gzipData.Length);
WriteByte(deZipData);
Reset();
}
head.TotalLength = ReadInt();
head.ErrorCode = ReadInt();
head.MsgId = ReadInt();
head.ErrorInfo = ReadString();
head.Action = ReadInt();
head.St = ReadString();
return(head);
}
catch (Exception ex)
{
string error = string.Format("read to {0}/{1}pos error,\r\nbytes:{2}", Offset, Length, ToHexString());
throw new OverflowException(error, ex);
}
}
/// <summary>
/// 自动压缩
/// </summary>
/// <param name="buffer"></param>
/// <returns>返回压缩后的字节</returns>
public byte[] CompressBuffer(byte[] buffer)
{
if (buffer.Length > EnableGzipMinByte)
{
return(GzipUtils.EnCompress(buffer, 0, buffer.Length));
}
return(buffer);
}
private static byte[] CompressGzipBuffer(byte[] data)
{
return(GzipUtils.EnCompress(data, 0, data.Length));
}