start_robot_browser.js

#!/usr/bin/env node

// used documentation and initial example code from
// https://github.com/GoogleChrome/puppeteer
// and
// https://github.com/GoogleChrome/puppeteer/blob/master/docs/api.md

const puppeteer = require('puppeteer');
const logId = 'start_robot_browser.js';

// You may want to change this to test that the
// robot is using certificates that are valid for its real hostname
let robotHostname = "localhost";
if (process.argv.length > 2) {
	robotHostname = process.argv[2]
}

(async () => {
	try {

		const navigation_timeout_ms = 30000; //30 seconds (default is 30 seconds)
		const min_idle_time = 1000;
		var try_again = false;
		var num_tries = 0;
		var max_tries = 50; // -1 means try forever

		///////////////////////////////////////////////
		// sleep code from
		// https://stackoverflow.com/questions/951021/what-is-the-javascript-version-of-sleep
		function sleep(ms) {
			return new Promise(resolve => setTimeout(resolve, ms));
		}
		///////////////////////////////////////////////
		const browser = await puppeteer.launch({
			headless: true, // default is true
			ignoreHTTPSErrors: true, // avoid ERR_CERT_COMMON_NAME_INVALID
			defaultViewport: null,
			args: ['--use-fake-ui-for-media-stream', //gives permission to access the robot's cameras and microphones (cleaner and simpler than changing the user directory)
				'--disable-features=WebRtcHideLocalIpsWithMdns'] // Disables mDNS hostname use in local network P2P discovery. Necessary for enterprise networks that don't forward mDNS traffic
		});
		const page = await browser.newPage();
		const mouse = page.mouse;

		// The following loop makes this script more robust, such as being
		// able to keep trying until the server comes up. It might also be
		// able to handle the WiFi network not coming up prior to this
		// script running, but I haven't tested it.    
		do {
			console.log(logId + ': trying to reach login page...');
			num_tries++;
			await page.goto(`https://${robotHostname}/login`,
				{
					timeout: navigation_timeout_ms
				}
			).then(
				function (response) {
					console.log(logId + ': ===================');
					console.log(logId + ': no error caught! page reached?');
					console.log(response);
					if (response === null) {
						console.log(logId + ': page.goto returned null, so try again');
						try_again = true;
					} else {
						console.log(logId + ': page.goto returned something other than null, so proceed with fingers crossed...');
						try_again = false;
					}
					console.log(logId + ': ===================');

				}).catch(
					async function (error) {
						console.log(logId + ': ===================');
						console.log(logId + ': promise problem with login page goto attempt');
						console.log(error);
						try_again = true;
						console.log(logId + ': so going to try again...');
						console.log(logId + ': ===================');
						await sleep(min_idle_time)
					});
			if ((max_tries != -1) && (num_tries >= max_tries)) {
				try_again = false;
			}
		} while (try_again);

		console.log(logId + ': page =');
		console.log(page);

		console.log(logId + ': type username');
		await page.$eval('#inputUsername', el => el.value = 'r1');

		console.log(logId + ': type password');
		await page.$eval('#inputPassword', el => el.value = 'NQUeUb98');

		console.log(logId + ': click submit');

		let robotPage = await Promise.all([
			page.click('#submitButton'),
			page.waitForNavigation({ waitUntil: 'networkidle2' })
		]);

		let is404 = robotPage[1]._status == 404;

		while (is404) {
			is404 = (await page.goto(`https://${robotHostname}/robot`, { timeout: navigation_timeout_ms }))._status == 404;
		}

		console.log(logId + ': start script complete');

	} catch (e) {
		console.log(logId + ': *********************************************');
		console.log(logId + ': *** SCRIPT STEPS SKIPPED DUE TO AN ERROR! ***');
		console.log(logId + ': *** error =                               ***');
		console.log(logId + ': ' + e);
		console.log(logId + ': *********************************************');
	}
})();