feat: add nocache helpers

x/nocache.go

@@ -0,0 +1,20 @@
+package x
+
+import (
+	"net/http"
+
+	"github.com/julienschmidt/httprouter"
+)
+
+// NoCache adds `Cache-Control: 0` to the response header.
+func NoCache(w http.ResponseWriter) {
+	w.Header().Set("Cache-Control", "0")
+}
+
+// NoCacheHandler wraps httprouter.Handle with `Cache-Control: 0` headers.
+func NoCacheHandler(handle httprouter.Handle) httprouter.Handle {
+	return func(w http.ResponseWriter, r *http.Request, ps httprouter.Params) {
+		NoCache(w)
+		handle(w, r, ps)
+	}
+}