air-quality.2m.js

#!/usr/bin/env /usr/local/bin/node

var http = require('http')

var icon = '♒︎'

function get(url) {
  return new Promise((resolve, reject) => {
    return http.get(url, res => {
      var body = ''
      res.on('data', chunk => {
        body += chunk
      })
      res.on('end', _ => {
        resolve(body)
      })
    }).on('error', reject)
  })
}

get('http://aqicn.org/city/beijing/us-embassy/')
.then(html => {
  var ma = html.match(/Beijing Air Quality Index: (\d+)\b/)
  if (ma) {
    console.log(`${icon} ${ma[1]}`)
    console.log('---')
    console.log('Refresh | refresh=true')
  } else {
    console.log(icon)
    console.log('---')
    console.log('Can`t parse')
  }
})
.catch(e => {
  console.log(icon)
  console.log('---')
  console.log(e.message)
})