Init commit

server/core/helpers/custom-validators/webfinger.ts

@@ -0,0 +1,15 @@
+import { REMOTE_SCHEME, WEBSERVER } from '../../initializers/constants.js'
+import { sanitizeHost } from '../core-utils.js'
+import { exists } from './misc.js'
+
+export function isWebfingerLocalResourceValid (value: string) {
+  if (!exists(value)) return false
+  if (value.startsWith('acct:') === false) return false
+
+  const actorWithHost = value.substring(5)
+  const actorParts = actorWithHost.split('@')
+  if (actorParts.length !== 2) return false
+
+  const host = actorParts[1]
+  return sanitizeHost(host, REMOTE_SCHEME.HTTP) === WEBSERVER.HOST
+}