问如何检查YouTube频道是否正在直播

EN

import { parse } from 'node-html-parser'
import fetch from 'node-fetch'

const youtubeAPIkey = 'YOUR_YOUTUBE_API_KEY'
const youtubeURLbase = 'https://www.googleapis.com/youtube/v3/videos?key=' + youtubeAPIkey + '&part=liveStreamingDetails,snippet&id='

const c = {cid: process.argv[2]}    // process.argv is array of arguments passed in console

const response = await fetch(`https://youtube.com/channel/${c.cid}/live`)
const text = await response.text()
const html = parse(text)
const canonicalURLTag = html.querySelector('link[rel=canonical]')
const canonicalURL = canonicalURLTag.getAttribute('href')

c.live = false
c.configured = canonicalURL.includes('/watch?v=')
if (!c.configured) process.exit()

c.vid = canonicalURL.match(/(?<==).*/)[0]

const data = await fetch(youtubeURLbase + c.vid).then(response => response.json())
if (data.error) {
    console.error(data)
    process.exit(1)
}
const i = data.items.pop()  // pop() grabs the last item
c.title = i.snippet.title
c.thumbnail = i.snippet.thumbnails.standard.url
c.scheduledStartTime = i.liveStreamingDetails.scheduledStartTime
c.live = i.liveStreamingDetails.hasOwnProperty('actualStartTime')
if (c.live) {
    c.actualStartTime = i.liveStreamingDetails.actualStartTime
}

console.log(c)

% node index.js UCNlfGuzOAKM1sycPuM_QTHg
{
  cid: 'UCNlfGuzOAKM1sycPuM_QTHg',
  live: true,
  configured: true,
  vid: '8yRgYiNH39E',
  title: ' Deep Focus 24/7 - Ambient Music For Studying, Concentration, Work And Meditation',
  thumbnail: 'https://i.ytimg.com/vi/8yRgYiNH39E/sddefault_live.jpg',
  scheduledStartTime: '2022-05-23T01:25:00Z',
  actualStartTime: '2022-05-23T01:30:22Z'
}