cloudfare-workers使用方法

// 1. 在 Cloudflare Workers 中创建一个新的 Worker
// 这个函数为入口函数，相当于main函数。
addEventListener('fetch', event => {
  event.respondWith(handleRequest(event.request))
})

// 3. 处理请求。
// 创建KV并且关联后，可以直接用关联的变量明作为KV对象，使用put或get对KV进行访问。
async function handleRequest(request) {
  if (request.method === 'POST' && request.url.endsWith('/clear-count')) {
    // 清空页面计数
    await PAGE_COUNT.put('page-views', '0')
    return new Response('Page count has been reset.', {
      headers: { 'Content-Type': 'text/plain' },
    })
  }

  // 从 KV 中获取页面计数
  let count = await PAGE_COUNT.get('page-views')

  if (count === null) {
    count = 1
  } else {
    count = parseInt(count, 10) + 1
  }

  // 构建页面内容, 使用let声明遍历那个，使用``将字符串进行包裹。
  let body = `This page has been visited ${count} times. <br><button onclick="clearCount()">Clear Count</button>`

  // 构建响应，使用respone生成对象
  return new Response(body, {
    headers: { 'Content-Type': 'text/html' },
  })
}

// 4. 定义清空计数的函数，使用fetch可以发起请求。
async function clearCount() {
  const response = await fetch('/clear-count', { method: 'POST' })
  const result = await response.text()
  console.log(result)
}

/**
 * Wait for requests to the worker
 */
addEventListener('fetch', event => {
  const url = new URL(event.request.url)
  if (url.pathname === WEBHOOK) {
    event.respondWith(handleWebhook(event))
  } else if (url.pathname === '/registerWebhook') {
    event.respondWith(registerWebhook(event, url, WEBHOOK, SECRET))
  } else if (url.pathname === '/unRegisterWebhook') {
    event.respondWith(unRegisterWebhook(event))
  } else {
    event.respondWith(new Response('No handler for this request'))
  }
})

// 基准 URL：
let baseUrl = "https://developer.mozilla.org";

let A = new URL("/", baseUrl);
// => 'https://developer.mozilla.org/'

let B = new URL(baseUrl);
// => 'https://developer.mozilla.org/'

new URL("en-US/docs", B);
// => 'https://developer.mozilla.org/en-US/docs'

let D = new URL("/en-US/docs", B);
// => 'https://developer.mozilla.org/en-US/docs'

new URL("/en-US/docs", D);
// => 'https://developer.mozilla.org/en-US/docs'

new URL("/en-US/docs", A);
// => 'https://developer.mozilla.org/en-US/docs'

new URL("/en-US/docs", "https://developer.mozilla.org/fr-FR/toto");
// => 'https://developer.mozilla.org/en-US/docs'

/**
* Set webhook to this worker's url
* https://core.telegram.org/bots/api## setwebhook
*/
async function registerWebhook (event, requestUrl, suffix, secret) {
// https://core.telegram.org/bots/api## setwebhook
const webhookUrl = `${requestUrl.protocol}//${requestUrl.hostname}${suffix}`
const r = await (await fetch(apiUrl('setWebhook', { url: webhookUrl, secret_token: secret }))).json()
return new Response('ok' in r && r.ok ? 'Ok' : JSON.stringify(r, null, 2))
}