/// <summary>
/// Gets the frame bytes.
/// </summary>
/// <returns></returns>
public Stream GetFrameBytes(bool compress, int compressTreshold)
{
var buffer = new PoolMemoryStream();
buffer.WriteByte((byte)Version);
buffer.WriteByte((byte)Flags);
buffer.WriteByte(unchecked((byte)Stream));
buffer.WriteByte((byte)OpCode);
//write length placeholder
buffer.WriteInt(0);
//write uncompressed data
WriteData(buffer);
//compress if allowed, and buffer is large enough to compress
if (compress && buffer.Length > compressTreshold + 8)
{
buffer.Position = 8;
//compress data to temporary stream
using (var compressed = new PoolMemoryStream())
{
//compress the data to the buffer
int length = Compressor.Compress(buffer, compressed);
//add compression to flags
Flags |= FrameFlags.Compression;
buffer.Position = 1;
buffer.WriteByte((byte)Flags);
//overwrite data with compressed data
buffer.Position = 8;
compressed.Position = 0;
compressed.CopyTo(buffer);
buffer.SetLength(length + 8);
}
}
//overwrite length with real value
buffer.Position = 4;
buffer.WriteInt((int)buffer.Length - 8);
//reset buffer position
buffer.Position = 0;
//return the buffer
return buffer;
}
/// <summary>
/// Gets the frame bytes.
/// </summary>
/// <returns> </returns>
public PoolMemoryStream GetFrameBytes(bool compress, int compressTreshold)
{
var buffer = new PoolMemoryStream();
int versionByte = (ProtocolVersion & 0x7f) | (IsRequest ? 0 : 0x80);
buffer.WriteByte((byte)versionByte);
buffer.WriteByte((byte)Flags);
if(ProtocolVersion <= 2)
buffer.WriteByte(unchecked((byte)Stream));
else
buffer.WriteShort(unchecked((ushort)Stream));
buffer.WriteByte((byte)OpCode);
//write length placeholder
buffer.WriteInt(0);
long headerLength = buffer.Position;
//write uncompressed data
WriteData(buffer);
//compress if allowed, and buffer is large enough to compress
if(compress && buffer.Length > headerLength + compressTreshold)
{
//rewind to start of content
buffer.Position = headerLength;
//compress data to temporary stream
using(var compressed = new PoolMemoryStream())
{
//compress the data to the buffer
int length = Compressor.Compress(buffer, compressed);
//add compression to flags
Flags |= FrameFlags.Compression;
buffer.Position = 1;
buffer.WriteByte((byte)Flags);
//overwrite data with compressed data
buffer.Position = headerLength;
compressed.Position = 0;
compressed.CopyTo(buffer);
buffer.SetLength(headerLength + length);
}
}
//overwrite length with real value
buffer.Position = headerLength - 4;
buffer.WriteInt((int)(buffer.Length - headerLength));
//reset buffer position
buffer.Position = 0;
//return the buffer
return buffer;
}
