From 5c6a211712502ac923665c9526b8a058852a3208 Mon Sep 17 00:00:00 2001
From: Jon Staab <shtaab@gmail.com>
Date: Wed, 1 Apr 2026 10:44:25 -0700
Subject: [PATCH] Fix isRelayUrl

---
 packages/util/src/Relay.ts | 21 +++++++++++----------
 1 file changed, 11 insertions(+), 10 deletions(-)

diff --git a/packages/util/src/Relay.ts b/packages/util/src/Relay.ts
index 9ada356..d8b05af 100644
--- a/packages/util/src/Relay.ts
+++ b/packages/util/src/Relay.ts
@@ -41,21 +41,22 @@ export const isRelayUrl = (url: string) => {
     url = "wss://" + url
   }
 
-  // Skip non-ws urls
-  if (!url.match(/^wss?:\/\//)) return false
-
-  // Skip urls with a slash before the dot
-  if (url.match(/\\.*\./)) return false
-
-  // Skip non-localhost urls without a dot
-  if (!url.match(/\./) && !url.includes("localhost")) return false
-
+  let parsed: URL
   try {
-    new URL(url)
+    parsed = new URL(url)
   } catch (e) {
     return false
   }
 
+  // Skip non-ws urls
+  if (!parsed.protocol.match(/^wss?:$/)) return false
+
+  // Host is required (rejects local file paths like /home/foo/bar.png)
+  if (!parsed.hostname) return false
+
+  // Skip non-localhost hosts without a dot (checks host, not path)
+  if (!parsed.hostname.includes(".") && parsed.hostname !== "localhost") return false
+
   return true
 }