该示例展示了如何将用户请求使用的 HTTP 协议重定向为 HTTPS 协议。

addEventListener("fetch", (event) => {
  event.respondWith(redirectToHTTPS(event.request));
});

async function redirectToHTTPS(request) {
  const url = new URL(request.url);

  if (url.protocol === "http:") {
    url.protocol = "https:";

    return new Response(null, {
      status: 301,
      headers: {
        Location: url.toString(),
      },
    });
  }

  return fetch(request);
}

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