opt: gzip + no cdn shi + feeds

main.go

@@ -1,12 +1,38 @@
 package main
 
 import (
+	"compress/gzip"
+	"io"
 	"log"
 	"net/http"
+	"strings"
 
 	"chaosmith-site/blog"
 )
 
+type gzipResponseWriter struct {
+	io.Writer
+	http.ResponseWriter
+}
+
+func (w gzipResponseWriter) Write(b []byte) (int, error) {
+	return w.Writer.Write(b)
+}
+
+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")
+		w.Header().Del("Content-Length")
+		gz := gzip.NewWriter(w)
+		defer gz.Close()
+		next.ServeHTTP(gzipResponseWriter{Writer: gz, ResponseWriter: w}, r)
+	})
+}
+
 func main() {
 	mux := http.NewServeMux()
 	mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
@@ -23,5 +49,5 @@ func main() {
 	}
 
 	log.Println("listening on :8000")
-	http.ListenAndServe(":8000", mux)
+	http.ListenAndServe(":8000", gzipHandler(mux))
 }