tencent cloud

async function handleRequest(request) {
  // 获取 Referer
  const referer = request.headers.get('Referer');

  // Referer 为空，禁止访问
  if (!referer) {
    return new Response(null, { status: 403 });
  }
  
  const urlInfo = new URL(request.url);
  const refererRegExp = new RegExp(`^https?:\\/\\/${urlInfo.hostname}\\/t-[0-9a-z]{10}\\/.*`)
  
  // Referer 不在白名单，禁止访问
  if (!refererRegExp.test(referer)) {
    return new Response(null, { status: 403 });
  }

  // 正常请求，访问 EdgeOne 节点缓存或回源
  return fetch(request);
}

addEventListener('fetch', event => {
  // 当函数代码抛出未处理的异常时，边缘函数会将此请求转发回源站 
  event.passThroughOnException();
  event.respondWith(handleRequest(event.request));
});