mise.js

const {parse, SELECTOR, DATA, CONVERT} = require('crawl-it')
const http = require('http')

const httpGet = (url, cb) => http.get(url, res => {
	if(res.statusCode !== 200) return;

	res.setEncoding('utf8')
	let body = ''
	res.on('data', ch => body += ch)
	res.on('end', () => cb(body))
})

const parseTemplate = {
	meta: {
		[SELECTOR]: '#header>h1',
		where: '.tit/text()',
		when: '.tim'
	},

	grapes: [{
		[SELECTOR]: 'li[id^="jsAnchorDust"]',
		name: {
			[DATA]: './.tit',
			[CONVERT]: v => v.replace(/환경기준/, '').trim()
		},
		id: '.graph2@id'
	}],

	// script parsing
	script: {
		[DATA]: 'body>script:last-of-type/text()',
		[CONVERT]: v => (v.split('//7가지 물질 차트생성')[1] || '')
			.split('new google.visualization.DataTable();')
			.map(para => {
				const [beforeRender, after] = para.split('new google.visualization.LineChart(')
				const maybeHere = beforeRender.split('data.addRows([')[1];
				if(maybeHere == null || after == null) return null

				const id = (after.match(/getElementById\('([^']+)'\)\)/) || [])[1]
				const data = maybeHere.split(');')[0].split('[').map(v => {
					const m = v.match(/['"]([0-2]?[0-9])시['"]\s*,\s*([0-9\.]+)\s*,/)
					return m ? {hour: (m[1] | 0), val:  m[2]} : m
				}).filter(v => v != null)

				return {id, data}
			}).filter(v => v != null)
	},

	[CONVERT]: ({meta, grapes, script}) => {
		grapes.forEach(o => {
			const sameIdData = script.filter(v => v.id === o.id)[0]
			if(sameIdData != null) o.data = sameIdData.data
		})
		return {...meta, grapes}
	}
}

httpGet({
	hostname: 'm.airkorea.or.kr',

	// 황간역
	path: '/main?lat=36.2250075&lng=127.9120465',

	headers: {
		Accept: 'text/html;charset=utf-8',
		'Accept-Charset': 'utf-8',
		
		// User Agent is important. It should be given.
		'User-Agent': 'curl/7.54.0'
	}
}, body => {
	const result = parse(body, parseTemplate)
	console.dir(result)
})