/// <summary>
/// 将缓冲队列写入缓冲区,大于10k开始压缩
/// </summary>
/// <param name="head"></param>
public void WriteBuffer(MessageHead head)
{
int stackSize = GetHeadByteSize(head);
stackSize += GetStackByteSize();//包括了头部长度大小
head.TotalLength = stackSize;
bool hasGzipHead = false;
if (head.HasGzip && (!EnableGzip || (EnableGzip && stackSize <= EnableGzipMinByte)))
{
hasGzipHead = true;
head.GzipLength = stackSize;
WriteByte(head.GzipLength);
}
//输出总字节长度,公式: stackSize = len(头) + len(内容) + 4(int)
WriteByte(stackSize);
WriteHeadBufer(head);
WriteStackToBuffer();
//判断是否有启用Gzip
if (head.HasGzip && EnableGzip && !hasGzipHead && stackSize > EnableGzipMinByte)
{
byte[] orgData = PopBuffer();
head.GzipLength = WriteGzipCompressBuffer(orgData);
}
head.PacketLength = Length;
Reset();
}
/// <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);
}
}
private void WriteHeadBufer(MessageHead head)
{
WriteByte(head.ErrorCode);
WriteByte(head.MsgId);
WriteByte(head.ErrorInfo);
WriteByte(head.Action);
WriteByte(head.St);
}
private int GetHeadByteSize(MessageHead head)
{
int length = 0;
length += GetByteSize(head.ErrorCode);
length += GetByteSize(head.MsgId);
length += GetByteSize(head.ErrorInfo);
length += GetByteSize(head.Action);
length += GetByteSize(head.St);
return(length);
}
/// <summary>
/// 读取消息头
/// </summary>
/// <returns></returns>
public MessageHead ReadHead()
{
MessageHead head = new MessageHead();
head.PacketLength = Length;
head.TotalLength = ReadInt();
head.ErrorCode = ReadInt();
head.MsgId = ReadInt();
head.ErrorInfo = ReadString();
head.Action = ReadInt();
head.St = ReadString();
return(head);
}