core/installer/server/caching_handler.go

package server

import (
	"net/http"
)

type cachingHandler struct {
	h http.Handler
}

func NewCachingHandler(h http.Handler) http.Handler {
	return cachingHandler{h}
}

func (h cachingHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
	w.Header().Set("Cache-Control", "max-age=604800")
	h.h.ServeHTTP(w, r)
}