package handler import ( "net/http" ) func Static(dir string) http.Handler { fs := http.FileServer(http.Dir(dir)) return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { w.Header().Set("Content-Security-Policy", "default-src 'self'; script-src 'self'; style-src 'self'; img-src 'self' data:; connect-src 'self'; object-src 'none'; base-uri 'self'; frame-ancestors 'none'") w.Header().Set("X-Content-Type-Options", "nosniff") w.Header().Set("Referrer-Policy", "no-referrer") w.Header().Set("Permissions-Policy", "geolocation=(), microphone=(), camera=()") w.Header().Set("X-Frame-Options", "DENY") w.Header().Set("Cache-Control", "no-store") fs.ServeHTTP(w, r) }) }