Function createHostCheck

packages/server/src/middleware/hostnames.ts:161–172

(opts: HostCheckOptions)

 * route handler never runs.
 */
export function createHostCheck(opts: HostCheckOptions): HostCheck {
  const isAllowed = (host: string | undefined): boolean => isAllowedHost(host, opts);
  const onRequest = async (
    req: FastifyRequest,
    reply: FastifyReply,
  ): Promise<FastifyReply | void> => {
    if (!isAllowed(req.headers.host)) {
      return reply.code(403).send(errEnvelope(HOST_ERROR_CODE, formatHostErrorMessage(req.headers.host), req.id));
    }
  };
  return { onRequest, isAllowed };
}