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authorDeterminant <[email protected]>2020-07-30 14:18:44 -0400
committerDeterminant <[email protected]>2020-07-30 14:18:44 -0400
commit0444e66f640999c15496066637841efcc0433934 (patch)
treec19aec2dced2e9129c880c19c52ca0f87b3d62f6 /rpc/gzip.go
parentcffa0954bbdb43821d1b71d00f99fb705cecd25b (diff)
parent1f49826de2bb8bb4f5f99f69fd2beb039b1172d9 (diff)
Merge branch 'multi-coin'
Diffstat (limited to 'rpc/gzip.go')
-rw-r--r--rpc/gzip.go66
1 files changed, 66 insertions, 0 deletions
diff --git a/rpc/gzip.go b/rpc/gzip.go
new file mode 100644
index 0000000..a14fd09
--- /dev/null
+++ b/rpc/gzip.go
@@ -0,0 +1,66 @@
+// 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"
+ "io/ioutil"
+ "net/http"
+ "strings"
+ "sync"
+)
+
+var gzPool = sync.Pool{
+ New: func() interface{} {
+ w := gzip.NewWriter(ioutil.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)
+ })
+}