server/helpers/custom-validators/webfinger.ts


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import { CONFIG, REMOTE_SCHEME } from '../../initializers'
import { sanitizeHost } from '../core-utils'
import { exists } from './misc'

function isWebfingerResourceValid (value: string) {
  if (!exists(value)) return false
  if (value.startsWith('acct:') === false) return false

  const actorWithHost = value.substr(5)
  const actorParts = actorWithHost.split('@')
  if (actorParts.length !== 2) return false

  const host = actorParts[1]

  return sanitizeHost(host, REMOTE_SCHEME.HTTP) === CONFIG.WEBSERVER.HOSTNAME
}

// ---------------------------------------------------------------------------

export {
  isWebfingerResourceValid
}