@r-yev/detector

Detector

Command line

Installation

$ npm i -g Detector

Usage

Detector <url> [options]

Options

-b, --batch-size=...       Process links in batches
-d, --debug                Output debug messages
-t, --delay=ms             Wait for ms milliseconds between requests
-h, --help                 This text
-H, --header               Extra header to send with requests
--html-max-cols=...        Limit the number of HTML characters per line processed
--html-max-rows=...        Limit the number of HTML lines processed
-D, --max-depth=...        Don't analyse pages more than num levels deep
-m, --max-urls=...         Exit when num URLs have been analysed
-w, --max-wait=...         Wait no more than ms milliseconds for page resources to load
-p, --probe=[basic|full]   Perform a deeper scan by performing additional requests and inspecting DNS records
-P, --pretty               Pretty-print JSON output
--proxy=...                Proxy URL, e.g. 'http://user:pass@proxy:8080'
-r, --recursive            Follow links on pages (crawler)
-a, --user-agent=...       Set the user agent string
-n, --no-scripts           Disabled JavaScript on web pages
-N, --no-redirect          Disable cross-domain redirects
-e, --extended             Output additional information
--local-storage=...        JSON object to use as local storage
--session-storage=...      JSON object to use as session storage
--defer=ms                 Defer scan for ms milliseconds after page load

Dependency

Installation

$ npm i Detector

Usage

const Detector = require('Detector')

const url = 'https://www.youtube.com'

const options = {
  debug: false,
  delay: 500,
  headers: {},
  maxDepth: 3,
  maxUrls: 10,
  maxWait: 5000,
  recursive: true,
  probe: true,
  proxy: false,
  userAgent: 'Detector',
  htmlMaxCols: 2000,
  htmlMaxRows: 2000,
  noScripts: false,
  noRedirect: false,
};

const Detector = new Detector(options)

;(async function() {
  try {
    await Detector.init()

    // Optionally set additional request headers
    const headers = {}

    // Optionally set local and/or session storage
    const storage = {
      local: {}
      session: {}
    }

    const site = await Detector.open(url, headers, storage)

    // Optionally capture and output errors
    site.on('error', console.error)

    const results = await site.analyze()

    console.log(JSON.stringify(results, null, 2))
  } catch (error) {
    console.error(error)
  }

  await Detector.destroy()
})()

Multiple URLs can be processed in parallel:

const Detector = require('Detector');

const urls = ['https://www.youtube.com', 'https://www.example.com']

const Detector = new Detector()

;(async function() {
  try {
    await Detector.init()

    const results = await Promise.all(
      urls.map(async (url) => {
        const site = await Detector.open(url)

        const results = await site.analyze()

        return { url, results }
      })
    )

    console.log(JSON.stringify(results, null, 2))
  } catch (error) {
    console.error(error)
  }

  await Detector.destroy()
})()

Events

Listen to events with site.on(eventName, callback). Use the page parameter to access the Puppeteer page instance (reference).

Event	Parameters	Description
log	message, source	Debug messages
error	message, source	Error messages
request	page, request	Emitted at the start of a request
response	page, request	Emitted upon receiving a server response
goto	page, url, html, cookies, scriptsSrc, scripts, meta, js, language links	Emitted after a page has been analysed
analyze	urls, technologies, meta	Emitted when the site has been analysed