Add dashboard to steve

pkg/responsewriter/cache.go

@@ -0,0 +1,49 @@
+package responsewriter
+
+import (
+	"net/http"
+	"strings"
+
+	"github.com/gorilla/mux"
+)
+
+func CacheMiddleware(suffixes ...string) mux.MiddlewareFunc {
+	return mux.MiddlewareFunc(func(handler http.Handler) http.Handler {
+		return Cache(handler, suffixes...)
+	})
+}
+
+func Cache(handler http.Handler, suffixes ...string) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		i := strings.LastIndex(r.URL.Path, ".")
+		if i >= 0 {
+			for _, suffix := range suffixes {
+				if suffix == r.URL.Path[i+1:] {
+					w.Header().Set("Cache-Control", "max-age=31536000, public")
+				}
+			}
+		}
+		handler.ServeHTTP(w, r)
+	})
+}
+
+func NoCache(handler http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Cache-Control", "no-cache, no-store, must-revalidate")
+		handler.ServeHTTP(w, r)
+	})
+}
+
+func DenyFrameOptions(handler http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("X-Frame-Options", "deny")
+		handler.ServeHTTP(w, r)
+	})
+}
+
+func ContentTypeOptions(handler http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("X-Content-Type-Options", "nosniff")
+		handler.ServeHTTP(w, r)
+	})
+}