@cocreate/lighthouse/src/server.js

A simple lighthouse component in vanilla javascript. Easily configured using HTML5 attributes and/or JavaScript API.

'use strict'
const lighthouse = require('lighthouse');
//const config = require('./config.js');
const fs = require('fs');
const chromeLauncher = require('chrome-launcher');
const puppeteer = require("puppeteer");

class CoCreateLightHouse {
    constructor(wsManager) {
        this.name = 'lighthouse';
        this.wsManager = wsManager;
        this.init();
    }

    init() {
        if (this.wsManager) {
            this.wsManager.on(this.name, (socket, data) => this.sendData(socket, data));
        }
    }

    async sendData(socket, data) {
        let type = data['type'];
        const params = data['data'];
        console.log("Lighthouse")
        switch (type) {
            case 'getHtml':
                this.getHtml(socket, type, params["data"]);
                break;
        }
    }

    async getHtml(socket, type, data) {
        /*  const chrome = await chromeLauncher.launch({chromeFlags: ['--headless']});
         const options = {logLevel: 'info', output: 'html', onlyCategories: ['performance'], port: chrome.port};
         const runnerResult = await lighthouse('https://example.com', options);
       
         // `.report` is the HTML report as a string
         const reportHtml = runnerResult.report
         console.log("---",reportHtml)
         fs.writeFileSync('lhreport.html', reportHtml);
       
         // `.lhr` is the Lighthouse Result as a JS object
         console.log('Report is done for', runnerResult.lhr.finalUrl);
         console.log('Performance score was', runnerResult.lhr.categories.performance.score * 100);
       
         await chrome.kill();
          */
        //const browser = await puppeteer.launch({headless: false});
        console.log("Entro")
        console.log(data)
        let url = data["url"];
        console.log("URL ", url)
        const chrome = await chromeLauncher.launch({ chromeFlags: ['--headless'] });
        const options = { logLevel: 'info', output: 'html', onlyCategories: ['performance'], port: chrome.port };
        const runnerResult = await lighthouse(url, options);
        const reportHtml = runnerResult.report;
        //let response = {"html":reportHtml,'score':runnerResult.lhr.categories.performance.score}
        this.wsManager({ socket, method: this.name, type, "response": runnerResult })
        //fs.writeFileSync('cocreate.html', reportHtml);
        //console.log(runnerResult.report)

        console.log('Report is done for', runnerResult.lhr.finalUrl);
        console.log('Performance score was', runnerResult.lhr.categories.performance.score * 100);

        await chrome.kill();
        //await browser.close();
        // console.log(browser)

    };

}
module.exports = CoCreateLightHouse;