Brotli is a generic-purpose lossless compression algorithm that compresses data using a combination of a modern variant of the LZ77 algorithm, Huffman coding, and 2nd order context modeling, with a compression ratio comparable to the best currently available general-purpose compression methods.
.NET Core 2.1 adds support for Brotli compression and decompression. You can use the stream-based System.IO.Compression.BrotliStream class or the high-performance span-based System.IO.Compression.BrotliEncoder and System.IO.Compression.BrotliDecoder classes.
The following example shows the compression with the BrotliStream class.
public Byte[] Compress(Byte[] input)
{
Byte[] output = null;
using (System.IO.MemoryStream msInput = new System.IO.MemoryStream(input))
using (System.IO.MemoryStream msOutput = new System.IO.MemoryStream())
using (BrotliStream bs = new BrotliStream(msOutput, System.IO.Compression.CompressionMode.Compress))
{
msInput.CopyTo(bs);
bs.Close();
output = msOutput.ToArray();
return output;
}
}
The following example shows the decompression with the BrotliStream class.
public Byte[] Decompress(Byte[] input)
{
Byte[] output = null;
using (System.IO.MemoryStream msInput = new System.IO.MemoryStream(input))
using (BrotliStream bs = new BrotliStream(msInput, System.IO.Compression.CompressionMode.Decompress))
using (System.IO.MemoryStream msOutput = new System.IO.MemoryStream())
{
bs.CopyTo(msOutput);
msOutput.Seek(0, System.IO.SeekOrigin.Begin);
output = msOutput.ToArray();
return output;
}
}