peixin / family-nat

Family nucleic acid test

家庭核酸检测

西安疫情期间，居家隔离，封门，防疫人员上门做核酸。

西安一码通，二维码暂不过期，防疫人员建议 由一个人保存所有家人的一码通截图，他们逐一扫码，无需每个人拿手机过来，以此加快效率。

遂，做了个这个小页面。

Features

• 编辑家庭人员，数据图片本地保存，离线使用
• 滑动顺序展示二维码
• 在线 / 本地 查看核酸结果

Use Cloudflare Worker to proxy api

wrangler secret put API_TOKEN
wrangler secret put NAAT_UUID
wrangler secret put NAAT_PRIVATE_KEY


cd packages/cloudflare-worker

// cp & edit wrangler.toml
cp wrangler.toml.template wrangler.toml

wrangler publish

Use 腾讯云 云函数 to proxy api

Environment Variables

API_TOKEN=
NAAT_PRIVATE_KEY=
NAAT_UUID=

Code: packages/tencent-scf/index.js

Environment Variables Description

Server-side Variables

• API_TOKEN

  Officially API can not be called across domain, so we need a self host proxy e.g. Cloudflare Worker, Tencent SCF. API_TOKEN is a simple authentication to access this service.

• NAAT_PRIVATE_KEY

• NAAT_UUID

  Officially using front-end signature The uuid and private key required for the signature are hard code in the JavaScript file, I had to hide it.

Local Storage

• naat-api-url:

  self host proxy server URL

• naat-api-token:

  API_TOKEN also need to save a copy on the front end

• familyData:

  Family Personnel Data Structure

  { "541560198001011452": { name: "王守仁", noQRCode: false, id: "541560198001011452" } } 

IndexedDB

Key: "541560198001011452"
Value: { id: "541560198001011452", imageB64Data: "data:image/jpeg;base64}

Local bulk check results

cd packages/cmd
// cp & edit data.js
cp data.js.template data.js

node get-result.js

Practice technical points

• Progressive Web Apps
  • Service Worker
• JavaScript modules via script tag
• IndexedDB
• CloudFlare Worker
  • ES Module
• Tencent SCF
• Javascript / Node Crypto
• Pure JavaScript DOM basic operations

TODO:

• Use Vue or React.js
  • In the non-simple business pure JavasScript processing DOM is still not as easy as the framework
• Use UI Library for beautiful UI
• WeChat Mini Program

Storage Usage

• Local Storage
• IndexedDB
• Cache Storage

Screenshot