find download link from pornhub.com

import { getPage } from './common'

async function getLink(index: number) {
  const url = `https://www.pornhub.com/view_video.php?viewkey=${index}`
  const ret = await getPage(url)

  const match = /"quality_720p":"(http.+?)"/.exec(ret)
  if (match) {
    return match[1].replace(/\\u002F/g, '/').replace(/\\/g, '')
  }
  return ''
}

export default getLink