From d6c2140821a4595862e063949d2f92530bd16cfd Mon Sep 17 00:00:00 2001
From: Hazelnoot <acomputerdog@gmail.com>
Date: Mon, 5 May 2025 09:43:40 -0400
Subject: validate more URLs in UrlPreviewService.ts

---
 packages/backend/src/core/UtilityService.ts | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'packages/backend/src/core')

diff --git a/packages/backend/src/core/UtilityService.ts b/packages/backend/src/core/UtilityService.ts
index f8d04c0592..170afc72dc 100644
--- a/packages/backend/src/core/UtilityService.ts
+++ b/packages/backend/src/core/UtilityService.ts
@@ -176,4 +176,14 @@ export class UtilityService {
 		const host = this.extractDbHost(uri);
 		return this.isFederationAllowedHost(host);
 	}
+
+	@bindThis
+	public getUrlScheme(url: string): string {
+		try {
+			// Returns in the format "https:" or an empty string
+			return new URL(url).protocol;
+		} catch {
+			return '';
+		}
+	}
 }
-- 
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