2026 新年快乐！来做个 2025 的年终总结吧！

export default {
  async fetch(request, env) {
    const url = new URL(request.url);

    if (url.protocol === "http:") {
      url.protocol = "https:";
      return Response.redirect(url.href, 301);
    }

    const targetHost = "www.gravatar.com";
    const username = "你的 Gravatar 用户名";

    const actualPath = url.pathname === "/" ? `/${username}` : url.pathname;
    const targetUrl = `https://${targetHost}${actualPath}${url.search}`;

    let response = await fetch(targetUrl, {
      headers: {
        "User-Agent": request.headers.get("User-Agent"),
        "Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8",
      }
    });

    const contentType = response.headers.get("content-type") || "";

    if (contentType.includes("text/html")) {
      const rewriter = new HTMLRewriter()
        .on("head", {
          element(e) {
            const iconUrl = `https://www.gravatar.com/avatar/这里填你注册邮箱的MD5?s=32`;
            e.append(`<link rel="icon" type="image/png" href="${iconUrl}">`, { html: true });
          }
        })
        .on("#unified-header", { element(e) { e.remove(); } })
        .on("footer", { element(e) { e.remove(); } })
        .on("img", {
          element(e) {
            const src = e.getAttribute("src");
            if (src && src.startsWith("/")) {
              e.setAttribute("src", `https://${targetHost}${src}`);
            }
          }
        })
        .on("link", {
          element(e) {
            const href = e.getAttribute("href");
            if (href && href.startsWith("/")) {
              e.setAttribute("href", `https://${targetHost}${href}`);
            }
          }
        });

      let newHdrs = new Headers(response.headers);
      newHdrs.delete("X-Frame-Options");
      newHdrs.delete("Content-Security-Policy");
      newHdrs.set("Content-Type", "text/html; charset=utf-8");

      const transformedResponse = rewriter.transform(response);

      return new Response(transformedResponse.body, {
        status: response.status,
        headers: newHdrs
      });
    }

    return response;
  }
};