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decompress brotli payload before minifying

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This commit is contained in:
Barna Csorogi 2018-08-31 23:28:46 +08:00
parent d3a5129f1f
commit 455a570e9c
1 changed files with 14 additions and 4 deletions
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18
transcoder/zip.go
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@ -2,17 +2,19 @@ package transcoder
import (
"compress/gzip"
"github.com/barnacs/compy/proxy"
brotlienc "gopkg.in/kothar/brotli-go.v0/enc"
"net/http"
"strings"
"github.com/barnacs/compy/proxy"
brotlidec "gopkg.in/kothar/brotli-go.v0/dec"
brotlienc "gopkg.in/kothar/brotli-go.v0/enc"
)
type Zip struct {
proxy.Transcoder
BrotliCompressionLevel int
GzipCompressionLevel int
SkipGzipped bool
SkipCompressed bool
}
func (t *Zip) Transcode(w *proxy.ResponseWriter, r *proxy.ResponseReader, headers http.Header) error {
@ -28,7 +30,7 @@ func (t *Zip) Transcode(w *proxy.ResponseWriter, r *proxy.ResponseReader, header
}
// always gunzip if the client supports Brotli
if r.Header().Get("Content-Encoding") == "gzip" && (shouldBrotli || !t.SkipGzipped) {
if r.Header().Get("Content-Encoding") == "gzip" && (shouldBrotli || !t.SkipCompressed) {
gzr, err := gzip.NewReader(r.Reader)
if err != nil {
return err
@ -39,6 +41,14 @@ func (t *Zip) Transcode(w *proxy.ResponseWriter, r *proxy.ResponseReader, header
w.Header().Del("Content-Encoding")
}
if r.Header().Get("Content-Encoding") == "br" && !t.SkipCompressed {
brr := brotlidec.NewBrotliReader(r.Reader)
defer brr.Close()
r.Reader = brr
r.Header().Del("Content-Encoding")
w.Header().Del("Content-Encoding")
}
if shouldBrotli && compress(r) {
params := brotlienc.NewBrotliParams()
params.SetQuality(t.BrotliCompressionLevel)