@@ -16,10 +16,17 @@ "github.com/pkg/errors" )
 
 type File struct {
-	filename     string
 	contentType  string
 	etag         string
 	alternatives map[string]string
+}
+
+func (f *File) AvailableEncodings() []string {
+	encs := []string{}
+	for enc := range f.alternatives {
+		encs = append(encs, enc)
+	}
+	return encs
 }
 
 var files = map[string]*File{}
@@ -49,10 +56,11 @@ if err != nil { 		return err
 	}
 	f := File{
-		filename:     fp,
-		contentType:  mime.TypeByExtension(filepath.Ext(fp)),
-		etag:         hash,
-		alternatives: map[string]string{},
+		contentType: mime.TypeByExtension(filepath.Ext(fp)),
+		etag:        hash,
+		alternatives: map[string]string{
+			"identity": fp,
+		},
 	}
 	for enc, suffix := range encodings {
 		_, err := os.Stat(fp + suffix)

@@ -80,15 +80,13 @@ w.Header().Add("Content-Security-Policy", cfg.CSP.String()) 		for k, v := range cfg.Extra.Headers {
 			w.Header().Add(k, v)
 		}
-		enc := nego.NegotiateContentEncoding(r, "br", "gzip")
+		enc := nego.NegotiateContentEncoding(r, file.AvailableEncodings()...)
 		switch enc {
-		case "", "identity":
-			http.ServeFile(w, r, files[urlPath].filename)
 		case "br", "gzip":
 			w.Header().Add("Content-Encoding", enc)
 			w.Header().Add("Content-Type", file.contentType)
-			http.ServeFile(w, r, files[urlPath].alternatives[enc])
 		}
+		http.ServeFile(w, r, files[urlPath].alternatives[enc])
 
 		return nil
 	}))