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package main
import (
"compress/gzip"
"io"
"net/http"
"strings"
)
type gzipResponseWriter struct {
io.Writer
http.ResponseWriter
}
func (grw gzipResponseWriter) Write(data []byte) (int, error) {
return grw.Writer.Write(data)
}
func gzipHandler(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")
gzipWriter := gzip.NewWriter(w)
defer gzipWriter.Close()
gzippedResponseWriter := gzipResponseWriter{Writer: gzipWriter, ResponseWriter: w}
next.ServeHTTP(gzippedResponseWriter, r)
})
}
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