-
-
Save klintmane/20aac190f29af01eb1d409e0d23a881c to your computer and use it in GitHub Desktop.
Idiomatic golang net/http gzip transparent compression, an updated version of https://gist.github.com/bryfry/09a650eb8aac0fb76c24
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
package main | |
import ( | |
"net/http" | |
"compress/gzip" | |
"io/ioutil" | |
"strings" | |
"sync" | |
"io" | |
) | |
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 Gzip(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) | |
}) | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment