Update the _examples/mvc/login example - add a Path property at mvc.Response and add a context.Proceed helper function

Former-commit-id: b898901fe4a324e888a6e09c93530cf7a551cf2a

mvc/method_result_view.go

@@ -36,9 +36,14 @@ const dotB = byte('.')
 var DefaultViewExt = ".html"
 
 func ensureExt(s string) string {
+	if len(s) == 0 {
+		return "index.html"
+	}
+
 	if strings.IndexByte(s, dotB) < 1 {
 		s += DefaultViewExt
 	}
+
 	return s
 }