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// 根据国家进行路由判断
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async fetch(request, env, ctx) {
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  const { country, city } = request.cf;
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  if (country === "CN") {
6
    return new Response(`你好，${city || "朋友"}！`);
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  }
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  return new Response(`Hello, ${city || "visitor"}!`);
9
}

1
// 常用的数据中心代码：SJC(圣何塞), LAX(洛杉矶), LHR(伦敦), HKG(香港), NRT(东京)
2
const { asn, asOrganization, colo, httpProtocol } = request.cf;
3

4
console.log(`请求来自 AS${asn} (${asOrganization})，由 ${colo} 数据中心处理，协议 ${httpProtocol}`);

1
const { tlsVersion, tlsCipher } = request.cf;
2

3
if (tlsVersion === "TLSv1.3" && tlsCipher === "AEAD-AES256-GCM-SHA384") {
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  // 高安全性连接
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}

1
// 仅在企业套餐下可用
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const { botScore, verifiedBot } = request.cf;
3

4
if (botScore > 70) {
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  // 高概率是人类访问者
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} else if (verifiedBot) {
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  // 是经过验证的爬虫，如 Googlebot
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}

1
export default {
2
  async fetch(request, env, ctx) {
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    const { country, timezone } = request.cf;
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    // 根据时区显示不同的问候语
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    const hour = new Date().toLocaleString("en-US", { timeZone: timezone, hour: "numeric" });
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    let greeting = "Good day!";
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9
    if (hour < 12) greeting = "Good morning!";
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    else if (hour < 18) greeting = "Good afternoon!";
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    else greeting = "Good evening!";
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13
    return new Response(`${greeting} Welcome from ${country}`);
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  }
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}

1
export default {
2
  async fetch(request, env, ctx) {
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    // 获取客户端真实 IP
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    const clientIP = request.headers.get('CF-Connecting-IP');
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6

7
    // 获取 request.cf 对象
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    const cf = request.cf;
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    // 构造完整信息
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    const info = {
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      ip: clientIP,
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      ...cf
14
    };
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    // 直接返回 JSON
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    return new Response(JSON.stringify(info, null, 2), {
18
      headers: { 'Content-Type': 'application/json' }
19
    });
20

21
  }
22
}

1
// 配合 Wrangler.toml 中的 routes 或自定义逻辑
2
async fetch(request, env, ctx) {
3
  const { country } = request.cf;
4

5
  // 限制特定国家访问
6
  const blockedCountries = ["XX", "YY"]; // 替换为实际国家代码
7
  if (blockedCountries.includes(country)) {
8
    return new Response("Access Denied", { status: 403 });
9
  }
10

11
  // 正常处理请求
12
  return fetch(request);
13
}

1
async fetch(request, env, ctx) {
2
  const logData = {
3
    timestamp: Date.now(),
4
    ip: request.headers.get('CF-Connecting-IP'),
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    country: request.cf.country,
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    asn: request.cf.asn,
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    colo: request.cf.colo,
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    url: request.url
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  };
10

11
  // 写入 KV 或外部日志服务
12
  ctx.waitUntil(env.LOG_KV.put(logData.timestamp.toString(), JSON.stringify(logData)));
13

14
  return fetch(request);
15
}