Cloudflare Workers 概览
了解 Cloudflare Workers 这一无服务器平台，学习如何在更靠近用户的边缘部署代码。
Cloudflare Workers 概览 是 CoddyKit 上的免费 Edge Computing with Cloudflare Workers & Deno 课时。 这是第 2 节课，共 4 节。 你可以在下方免费阅读本课时的完整内容 — 然后在浏览器中使用内置代码编辑器和全天候 AI 导师进行实践。 这是 Edge Computing with Cloudflare Workers & Deno 学习路径的一部分，你的进度在网页和 CoddyKit 应用中同步。 Edge Computing with Cloudflare Workers & Deno 课程共包含 4 节课。
本课时的部分内容尚未翻译，以英文显示。
Meet Cloudflare Workers
Cloudflare Workers is a serverless platform that runs your code on Cloudflare's global network — incredibly close to your users, wherever they are.
Serverless, but Closer
Like AWS Lambda, Workers are serverless — you write code, Cloudflare runs it with no servers to manage. The twist: it executes at the edge, near every user.
How Workers Intercept Requests
A Worker intercepts requests. Before a call hits your origin, it lands on a Cloudflare edge server where your code can modify, answer, or redirect it.
Why Choose Workers?
Workers are fast (code runs milliseconds from users), auto-scaling, cheap (pay per use), and global across hundreds of data centers. Ideal for modern apps.
Common Worker Use Cases
Workers shine for A/B testing, API gateways, content personalization, and on-the-fly image resizing — a lightweight backend or a boost to your existing one.
Workers Use JavaScript
Workers run standard JavaScript (or TypeScript) on the V8 engine — the same one behind Chrome and Node. Familiar syntax, familiar tools.
Anatomy of a Worker
A Worker listens for fetch events — incoming HTTP requests — and responds. This example just returns a plain Hello to any request.
addEventListener('fetch', event => {
event.respondWith(handleRequest(event.request))
})
async function handleRequest(request) {
// This Worker responds to ANY incoming request
return new Response('Hello from Cloudflare Worker!', {
headers: { 'content-type': 'text/plain' },
})
}The 'fetch' Event
addEventListener('fetch', ...) is your Worker's entry point: it runs your code on each incoming request, and event.respondWith() sends the reply back.
Worker Environment & APIs
Workers give you standard Web APIs like Fetch and URL, plus Cloudflare extras like KV storage and Durable Objects — coming in later lessons.
Check Your Understanding
Which of the following are key benefits of using Cloudflare Workers?
Workers Overview Recap
Recap: Cloudflare Workers run serverless code at the edge, intercepting requests with fast, scalable, cheap JavaScript. Next: setting up your dev environment.
常见问题解答
「Cloudflare Workers 概览」课时是免费的吗？
是的 — 「Cloudflare Workers 概览」的完整文本可在网页上免费阅读。要进行交互式练习（内置代码编辑器和全天候 AI 导师）并解锁 Edge Computing with Cloudflare Workers & Deno 课程的其余内容，请升级到 CoddyKit PRO。 Edge Computing with Cloudflare Workers & Deno 课程共包含 4 节课。
「Cloudflare Workers 概览」这节课中我会学到什么？
了解 Cloudflare Workers 这一无服务器平台，学习如何在更靠近用户的边缘部署代码。 你通过在浏览器中直接运行的动手代码来练习 Edge Computing with Cloudflare Workers & Deno，全天候 AI 导师会在你学习这节课的过程中回答你的问题。
学习 Edge Computing with Cloudflare Workers & Deno 需要有经验吗？
无需任何先前经验。CoddyKit 上的 Edge Computing with Cloudflare Workers & Deno 课程适合初学者到高级学习者，你可以从这里开始或从头开始，按照自己的节奏学习。 这是第 2 节课，共 4 节。
「Cloudflare Workers 概览」课时需要多长时间？
大多数 CoddyKit 课程大约需要 5–10 分钟。每节课都很精短且互动，所以你能稳步进步，并在网页和应用中从离开的地方继续。
我能在这节 Edge Computing with Cloudflare Workers & Deno 课中编写并运行代码吗？
能。每节 Edge Computing with Cloudflare Workers & Deno 课都包含内置代码编辑器，你可以在浏览器中直接编写并运行真实代码，并获得即时 AI 反馈 — 无需本地设置。
此课程中的所有课时
- 什么是边缘计算
- Cloudflare Workers 概览
- Deno：面向边缘的运行时
- 边缘、云与 CDN 的比较