You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
65 lines
1.7 KiB
65 lines
1.7 KiB
// Copyright 2019 The go-ethereum Authors
|
|
// This file is part of the go-ethereum library.
|
|
//
|
|
// The go-ethereum library is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Lesser General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// The go-ethereum library is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU Lesser General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Lesser General Public License
|
|
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
package rpc
|
|
|
|
import (
|
|
"compress/gzip"
|
|
"io"
|
|
"net/http"
|
|
"strings"
|
|
"sync"
|
|
)
|
|
|
|
var gzPool = sync.Pool{
|
|
New: func() interface{} {
|
|
w := gzip.NewWriter(io.Discard)
|
|
return w
|
|
},
|
|
}
|
|
|
|
type gzipResponseWriter struct {
|
|
io.Writer
|
|
http.ResponseWriter
|
|
}
|
|
|
|
func (w *gzipResponseWriter) WriteHeader(status int) {
|
|
w.Header().Del("Content-Length")
|
|
w.ResponseWriter.WriteHeader(status)
|
|
}
|
|
|
|
func (w *gzipResponseWriter) Write(b []byte) (int, error) {
|
|
return w.Writer.Write(b)
|
|
}
|
|
|
|
func newGzipHandler(next http.Handler) http.Handler {
|
|
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
|
if !strings.Contains(r.Header.Get("Accept-Encoding"), "gzip") {
|
|
next.ServeHTTP(w, r)
|
|
return
|
|
}
|
|
|
|
w.Header().Set("Content-Encoding", "gzip")
|
|
|
|
gz := gzPool.Get().(*gzip.Writer)
|
|
defer gzPool.Put(gz)
|
|
|
|
gz.Reset(w)
|
|
defer gz.Close()
|
|
|
|
next.ServeHTTP(&gzipResponseWriter{ResponseWriter: w, Writer: gz}, r)
|
|
})
|
|
}
|
|
|