public static T FromStream <T>(Stream stream, int version)
where T : MessageBase <T>
{
if (stream == null)
{
throw new ArgumentException("stream", nameof(stream));
}
try
{
return(MessageBase <T> .Import(Decompress(RemoveVersion(stream, version)), _bufferManager));
}
catch (Exception e)
{
Log.Debug(e);
return(null);
}
}
private static T FromStream <T>(int version, Stream stream)
where T : MessageBase <T>
{
try
{
stream.Seek(0, SeekOrigin.Begin);
// Check
{
var verifyCrc = Crc32_Castagnoli.Compute(new RangeStream(stream, 0, stream.Length - 4, true));
var orignalCrc = new byte[4];
using (var crcStream = new RangeStream(stream, stream.Length - 4, 4, true))
{
crcStream.Read(orignalCrc, 0, orignalCrc.Length);
}
if (!Unsafe.Equals(verifyCrc, orignalCrc))
{
throw new ArgumentException("Crc Error");
}
}
stream.Seek(0, SeekOrigin.Begin);
if (version != (int)Varint.GetUInt64(stream))
{
throw new ArgumentException("version");
}
int type = (int)Varint.GetUInt64(stream);
using (var dataStream = new RangeStream(stream, stream.Position, stream.Length - stream.Position - 4, true))
{
if (type == (int)ConvertCompressionAlgorithm.None)
{
return(MessageBase <T> .Import(dataStream, _bufferManager));
}
else if (type == (int)ConvertCompressionAlgorithm.Deflate)
{
using (var deflateBufferStream = new RecyclableMemoryStream(_bufferManager))
{
using (var deflateStream = new DeflateStream(dataStream, CompressionMode.Decompress, true))
using (var safeBuffer = _bufferManager.CreateSafeBuffer(1024 * 4))
{
int length;
while ((length = deflateStream.Read(safeBuffer.Value, 0, safeBuffer.Value.Length)) > 0)
{
deflateBufferStream.Write(safeBuffer.Value, 0, length);
if (deflateBufferStream.Length > 1024 * 1024 * 32)
{
throw new Exception("too large");
}
}
}
deflateBufferStream.Seek(0, SeekOrigin.Begin);
return(MessageBase <T> .Import(deflateBufferStream, _bufferManager));
}
}
else
{
throw new ArgumentException("ArgumentException");
}
}
}
catch (Exception e)
{
throw new ArgumentException(e.Message, e);
}
finally
{
if (stream != null)
{
stream.Dispose();
}
}
}