diff --git a/src/sammo/WebUtil.php b/src/sammo/WebUtil.php
index d35470e5..c4014db5 100644
--- a/src/sammo/WebUtil.php
+++ b/src/sammo/WebUtil.php
@@ -335,4 +335,10 @@ class WebUtil
 
         return join("\n", $result);
     }
+
+    public static function replaceDomain(string $origPath, string $newDomain): string{
+        $upath = \phpUri::parse($origPath);
+        $upath->authority = $newDomain;
+        return $upath->join('');
+    }
 }