全局安装 wrangler

npm install -g @cloudflare/wrangler

初始化项目 qr

wrangler generate qr

添加 qr-image 依赖包

npm install qr-image

替换 index.js 内容

相比参考链接，有所修改，去除了 POST 请求，改为 GET 请求获取参数

const qr = require('qr-image')

addEventListener('fetch', event => {
  event.respondWith(handleRequest(event.request))
})

const landing = `
<form action="./" method="GET">
  <input type="text" name="data" id="text" value="https://workers.dev">

  <button type="submit">Generate QR Code</button>
</form>
`

const generate = data => {
  const headers = { 'Content-Type': 'image/png' }
  const qr_png = qr.imageSync(data || 'https://workers.dev')
  return new Response(qr_png, { headers })
}

async function handleRequest(request) {
  let response
  const url = new URL(request.url)

  if (url.pathname === '/' && !url.searchParams.has('data')) {
    response = new Response(landing, {
      headers: { 'Content-Type': 'text/html' },
    })
  } else if (url.pathname === '/' && url.searchParams.has('data')) {
    response = generate(url.searchParams.get('data'))
  } else {
    response = new Response('404', {
      status: '404',
      headers: { 'Content-Type': 'text/html' },
    })
  }
  return response
}

修改配置文件 wrangler.toml

name = "qr"
type = "webpack"
account_id = ""
workers_dev = true
route = ""
zone_id = ""

type 值修改为 webpack, account_id 必填，修改成你的自己的。

登录 https://dash.cloudflare.com 后面的一段32位字符串就是 account_id

发布

wrangler publish

在线查看 https://qr.fun.workers.dev/

参考链接：

https://github.com/signalnerve/workers-qr-code-generator/

https://developers.cloudflare.com/workers/tutorials/build-a-qr-code-generator

Cloudflare Workers 试用

通过 DNS Api 签发 Let's Encrypt 证书