Montar un generador de capturas de pantalla en Tor

README.md

Montar un generador de capturas de pantalla en Tor

Importante

Necesitamos tener previamente corriendo Tor en la maquina:

• Opcíon para Ubuntu (Cloud/laptop/AWS/DO)

Pasos

1. Actualziamos la configuración de tor nano /etc/tor/torrc

SocksPort 9050

2. Instalar polipo apt-get install polipo
3. Modificar la configuración de polipo nano /etc/polipo/config

allowedClients = 127.0.0.1, 192.168.1.0/24 # Expose your network (modify accordingly)
socksParentProxy = "localhost:9050"
socksProxyType = socks5
proxyAddress = "0.0.0.0"    # IPv4 only

4. Instalamos dependencias nuevas en Ubuntu

bash
apt-get install -y libx11-xcb1 libxrandr2 libasound2 libpangocairo-1.0-0 libatk1.0-0 libatk-bridge2.0-0 libgtk-3-0 libnss3 libxss1

5. Montamos el capturador con Nodejs añadiendo package.json y server.js
6. Instalamos las dependencias npm install

Recursos

• Using Tor as a HTTP Proxy
• stephonchen/puppeteer-tor.js

package.json

{
  "name": "tor-proxy",
  "version": "1.0.0",
  "description": "Tor Proxy",
  "main": "server.js",
  "author": "Ulises Gascón",
  "license": "AGPL-3.0",
  "dependencies": {
    "express": "4.17.1",
    "node-schedule": "1.3.2",
    "puppeteer": "1.18.0",
    "request": "2.88.0",
    "rimraf": "2.6.3"
  }
}

server.js

const express = require('express')
const request = require('request')
const puppeteer = require('puppeteer')
const schedule = require('node-schedule')
const rimraf = require('rimraf')
const crypto = require('crypto')
const path = require('path')
const fs = require('fs')
const app = express()

// Proxy request
const r = request.defaults({'proxy':'http://127.0.0.1:8123'})

// Global settings
app.set('maintenence', false)

// Static files
app.use(express.static('public'))

//Routes
app.get('/', function (req, res) {
  res.sendFile(path.join(__dirname + '/public/index.html'))
})

app.get('/proxy', (req, res) => {
  const url = req.query.url

  if (!url) return res.status(404).send('Missing URL!')
  r(url, (err, response, body) => {
    if (!err && response.statusCode === 200) {
      return res.send(body)
    }
    res.status(404).send()
  })
})

app.get('/capture', async (req, res) => {
  const url = req.query.url

  if (!url) return res.status(404).send('Missing URL param!')

  if (app.enabled('maintenence')) return res.status(500).send('Try again in few seconds. Sorry!')

  const name = crypto.createHash('md5').update(url).digest('hex')
  const generatedPath = `/captures/${name}.png`

  if (fs.existsSync(`./${generatedPath}`)) {
    console.log(`Cached version served for ${url} as ${generatedPath}`)
    return res.sendFile(generatedPath, { root: __dirname })
  }

  console.log(`Generating capture for ${url} as ${generatedPath}`)
  const browser = await puppeteer.launch({ args: ['--no-sandbox', '--disable-setuid-sandbox', '--proxy-server=127.0.0.1:8123'] })
  const page = await browser.newPage()
  await page.goto(url)
  await page.setViewport({
    width: 1280,
    height: 1000,
    deviceScaleFactor: 1
  });
  await page.screenshot({ path: `.${generatedPath}`, fullPage: true })
  await browser.close()
  res.sendFile(generatedPath, { root: __dirname })
})

// Cron Cache control (“At minute 0 past every hour”)
schedule.scheduleJob(`* */1 * * *`, function () {
  console.log('Cache clean up time!')
  app.set('maintenence', true)
  rimraf('./captures/*', () => {
    console.log('Cache clean finished!')
    app.set('maintenence', false)
  })
})

app.listen(process.env.PORT || 3000)