Manage not existen or inactive relay

pages.go

@@ -424,6 +424,9 @@ type ErrorPage struct {
 }
 
 func (e *ErrorPage) TemplateText() string {
+	if e.Message != "" {
+		return tmplError
+	}
 	e.Message = "I cannot give any suggestions to solve the problem, maybe the best solution is to pubblicy blame the devs on Nostr"
 	if strings.Contains(e.Errors, "invalid checksum") {
 		e.Message = "It seems you entered an invalid event code, try to check if it is correct; a good idea is compare the first and the last characters"

render_relay.go

@@ -25,7 +25,18 @@ func renderRelayPage(w http.ResponseWriter, r *http.Request) {
 	}
 
 	// relay metadata
-	info, _ := nip11.Fetch(r.Context(), hostname)
+	info, err := nip11.Fetch(r.Context(), hostname)
+	if err != nil {
+		w.Header().Set("Cache-Control", "max-age=60")
+		errorPage := &ErrorPage{
+			Message: "The relay you are looking for does not exist or is offline; check the name in the url or try later",
+			Errors:  err.Error(),
+		}
+		errorPage.TemplateText()
+		w.WriteHeader(http.StatusNotFound)
+		ErrorTemplate.Render(w, errorPage)
+		return
+	}
 	if info == nil {
 		info = &nip11.RelayInformationDocument{
 			Name: hostname,