lambda

const chromium = require('chrome-aws-lambda');
const puppeteer = require('puppeteer-core');
const extractor = require('unfluff');
const summarize = require('summarize');


exports.handler = async (event, context, callback) => {
  
  console.log('Received event:', JSON.stringify(event, null, 2));

  const done = (err, res) => callback(null, {
      statusCode: err ? '503' : '200',
      body: err ? err : JSON.stringify(res),
      headers: {
          'Content-Type': 'application/json'
      },
  });
  
  function getUA(){
    const uastrings = ["Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/38.0.2125.111 Safari/537.36",
                "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/28.0.1500.72 Safari/537.36",
                "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10) AppleWebKit/600.1.25 (KHTML, like Gecko) Version/8.0 Safari/600.1.25",
                "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:33.0) Gecko/20100101 Firefox/33.0",
                "Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/38.0.2125.111 Safari/537.36",
                "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/38.0.2125.111 Safari/537.36",
                "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_5) AppleWebKit/600.1.17 (KHTML, like Gecko) Version/7.1 Safari/537.85.10",
                "Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko",
                "Mozilla/5.0 (Windows NT 6.3; WOW64; rv:33.0) Gecko/20100101 Firefox/33.0",
                "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/38.0.2125.104 Safari/537.36"
                ];

    return uastrings[Math.round( Math.random() * (uastrings.length-1), 0 )];

    }


  try {

    var data = {};
    const path = unescape(event.pathParameters.proxy);
    const mobile = false;
  
    var browser = await puppeteer.launch({
      args: chromium.args,
      defaultViewport: chromium.defaultViewport,
      executablePath: await chromium.executablePath,
      headless: chromium.headless,
    });

    let page = await browser.newPage();
    
    page.setUserAgent(getUA());
    
    page.setViewport({ width: 1000, height: 1000, mobile });

    await page.goto(path, { waitUntil : 'domcontentloaded' } );
    
    let content = await page.content();
    
    let ext = extractor(content);
    
    let stats = summarize(content)
    
    data = Object.assign(data, stats, ext);
 
    
  } catch (error) {

    //return done(error);
    return done(false, error.message + '\n\n' + JSON.stringify(event));
    
  } finally {
    
    if (browser !== null) {
      
      await browser.close();
      
    }
  }

  return done(false, data)
  
};