Add Brotli support

New Functions:

    CompressHandlerBrotliLevel(h RequestHandler, brotliLevel, otherLevel int) RequestHandler
    Request.BodyUnbrotli() ([]byte, error)
    Response.BodyUnbrotli() ([]byte, error)
    AppendBrotliBytesLevel(dst, src []byte, level int) []byte
    WriteBrotliLevel(w io.Writer, p []byte, level int) (int, error)
    WriteBrotli(w io.Writer, p []byte) (int, error)
    AppendBrotliBytes(dst, src []byte) []byte
    WriteUnbrotli(w io.Writer, p []byte) (int, error)
    AppendUnbrotliBytes(dst, src []byte) ([]byte, error)

New Constants:

    CompressBrotliNoCompression
    CompressBrotliBestSpeed
    CompressBrotliBestCompression
    CompressBrotliDefaultCompression

Brotli compression levels are different from gzip/flate. Because of this we have separate level constants and CompressHandlerBrotliLevel takes 2 levels.

I didn't add Brotli support to CompressHandler as this could cause a spike in CPU usage when users upgrade fasthttp.

fasthttp.CompressBrotliDefaultCompression is not the same as
brotli.DefaultCompression. brotli.DefaultCompression is more than twice
as slow as fasthttp.CompressBrotliDefaultCompression which I thought was
unreasonable as default.

1 files changed, 1 insertions, 0 deletions

diff --git a/strings.go b/strings.go
index 12f1926..abd16eb 100644
--- a/strings.go
+++ b/strings.go
@@ -69,6 +69,7 @@ var (
 
 	strClose               = []byte("close")
 	strGzip                = []byte("gzip")
+	strBr                  = []byte("br")
 	strDeflate             = []byte("deflate")
 	strKeepAlive           = []byte("keep-alive")
 	strUpgrade             = []byte("Upgrade")