index.js

'use strict';

const basicAuth = require('basic-auth');
const passwordGenerator = require('generate-password');
const PLUGIN_NAME = 'BS Authorization';

/**
 * @param {Object} opts
 * @param {BrowserSync} bs
 */
module.exports['plugin'] = (opts, bs) => {

    opts = Object.assign({
        generatePassword: {
            length: 7,
            numbers: true
        },
        user: 'browsersync',
        pass: false,
        use: true
    }, opts);


    if (!opts.use) {
        return void 0;
    }

    let logger = bs.getLogger(PLUGIN_NAME).info('Access Info:');

    if (typeof opts.logLevel !== 'undefined') {

        logger.setLevel(opts.logLevel);
    }

    if (typeof opts.pass === 'undefined' || !opts.pass) {

        Object.assign(opts, {
            pass: passwordGenerator.generate(opts.generatePassword)
        });
    }

    // Set bs-auth options in global Browsersync options
    bs.setOption('bsAuth', opts);

    console.log(' -------------------------------------');
    console.log(`        user: ${opts.user}`);
    console.log(`    password: ${opts.pass}`);
    console.log(' -------------------------------------');

    if (opts.use) {

        // add middleware for Authorization
        bs.addMiddleware('', (req, res, next) => {

            let auth = basicAuth(req);

            if (auth && auth.name === opts.user && auth.pass === opts.pass) {
                return next();
            } else {
                res.statusCode = 401;
                res.setHeader('WWW-Authenticate', `Basic realm="${PLUGIN_NAME}"`);
                res.end('Access denied');
            }

        }, {
            id: 'Browsersync Server Authorization Middleware',
            override: true
        });
    }

}