@cocreate/lighthouse/src/server.1.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.moduleName = 'lighthouse';
        this.wsManager = wsManager;
        this.init();
    }

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

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

    getHtml(socket, type, data) {
        (async () => {
            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")
                        const chrome = await chromeLauncher.launch({chromeFlags: ['--headless']});
                        const options = {logLevel: 'info', output: 'html', onlyCategories: ['performance'], port: chrome.port};
                        const runnerResult = await lighthouse('https://server.cocreate.app/CoCreate-website/src/', options);
                        const reportHtml = runnerResult.report;
                        // // fs.writeFileSync('cocreate.html', reportHtml);
            
                        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;