Trigger function on Page's requestfinished event

Created by: sebastienfi

Hi First of all, thanks for relasing this, awesome work guys 👍

I would like to access the Browser's Page's requestfinished event. I believe that event: 'requestfinished' is the Crawler's requestfinished event.

My intention is to download the ressources of the page (images, fonts, ...). I'm planning to do something like this :

// On my previous setup, page originates from
// const browser = await puppeteer.launch()
// const page = await browser.newPage()
page.on('requestfinished', async request => { 
  // do something with request
  const url = request.url()
  const match = /.*\.(jpg|png|gif)$/.exec(url)
  if (match && match.length === 2) {
    const split = url.split('/')
    let filename = split[split.length - 1]
    const response = request.response()
    const buffer = await response.buffer()
    fs.writeFileSync(`${crawlPathImages}/${filename}`, buffer, 'base64')
  }
})

How can I do this using your crawler ?