fast怎么设置域名过滤

const fastify = require('fastify')({ logger: true });

// 白名单过滤器
const allowedDomains = ['example.com', 'sub.example.com'];

fastify.addHook('preHandler', async (request, reply) => {
  const host = request.headers.host;
  if (!allowedDomains.includes(host)) {
    reply.code(403).send({ error: 'Forbidden' });
  }
});

fastify.get('/', async (request, reply) => {
  return { hello: 'world' };
});

const start = async () => {
  try {
    await fastify.listen(3000);
  } catch (err) {
    fastify.log.error(err);
    process.exit(1);
  }
};

start();

const allowedDomainsRegex = /^(example\.com|sub\.example\.com)$/;

fastify.addHook('preHandler', async (request, reply) => {
  const host = request.headers.host;
  if (!allowedDomainsRegex.test(host)) {
    reply.code(403).send({ error: 'Forbidden' });
  }
});