anderson-marques/gitlab_auth.js

## gitlab_auth.js
const http = require('http');

const GITLAB_OAUTH_AUTHORIZATION_URL = 'https://gitlab.com/oauth/authorize'
const GITLAB_OAUTH_CLIENT_ID = 'change-me'
const SERVER_PORT = 4321

let config = {
    'base_url': GITLAB_OAUTH_AUTHORIZATION_URL,
    'client_id': GITLAB_OAUTH_CLIENT_ID,
    'redirect_uri': `http://localhost:${SERVER_PORT}/cb`,
    'authentication_uri': `http://localhost:${SERVER_PORT}/auth`,
    'state': Math.floor(Math.random() * 999999),
    'scope': 'openid%20profile%20email',
}

let server;

const log = (m, ...o) => console.log(m, ...o);

const deviceLoginPage = `
<body style="font-family: 'Trebuchet MS', 'Lucida Sans Unicode', 'Lucida Grande', 'Lucida Sans', Arial, sans-serif">
<script>
    let originalHash = window.location.hash;
    window.location.hash = '';
    let accessToken;
    let tokenType;
    let state;
    if (originalHash.split('#').length == 2) {
        for (var param of originalHash.split('#')[1].split('&')){
            let paramName = param.split('=')[0]
            let paramValue = param.split('=')[1]
            console.log(paramName, ' ', paramValue )

            if (paramName === 'access_token'){
                accessToken = paramValue;
            }

            if (paramName === 'token_type'){
                tokenType = paramValue;
            }

            if (paramName === 'state'){
                state = paramValue;
            }
        }
    }

    if (accessToken && state) {
        fetch(
            'auth',
            {
                method: 'post',
                headers: {
                    "Content-type": "application/json; charset=UTF-8"
                },
                body: JSON.stringify({ "accessToken": accessToken, "state": state })
            }
        ).then(()=> console.log('Request succeeded!')).catch((error) => console.log('Request failed', error));
        setTimeout(window.close, 1000)
    } else {
        let title = document.createElement('h4');
        title.textContent = 'Invalid authentication request!'
    }
</script>
</body>
`
const terminate = () => {
    server.close()
    setImmediate(()=> server.emit('close'))
    process.exit(0)
}

const requestListener = function (req, res) {
    if (req.url.startsWith('/cb') && req.method === 'GET') {
        res.setHeader('Cache-Control', 'no-cache, no-store, max-age=0')
        res.writeHead(200);
        res.end(deviceLoginPage);
    }

    if (req.url.startsWith('/auth') && req.method === 'POST') {
        let body = '';
        req.on('data', chunk => {
            body += chunk;
        });
        req.on('end', () => {
            res.end();
            authentication = JSON.parse(body)
            var accessToken = authentication.accessToken
            var state = authentication.state

            if(accessToken && state && String(state) == String(config.state)) {
                log("\nSuccessfully authenticated!")
                terminate()
            } else {
                log("\nAuthentication failed!")
                terminate()
            }
        });
    }
}

const login = ()=> {
    base_url = config['base_url']
    client_id = config['client_id']
    redirect_uri = config['redirect_uri']
    state = config['state']
    scope = config['scope']

    login_url = `${base_url}?client_id=${client_id}&redirect_uri=${redirect_uri}&response_type=token&state=${state}&scope=${scope}`

    log(`\nClick or copy and paste this link in your browser: \n\n${login_url}`)
    server = http.createServer(requestListener);
    server.listen(SERVER_PORT);
}

login(config)
	const http = require('http');

	const GITLAB_OAUTH_AUTHORIZATION_URL = 'https://gitlab.com/oauth/authorize'
	const GITLAB_OAUTH_CLIENT_ID = 'change-me'
	const SERVER_PORT = 4321

	let config = {
	'base_url': GITLAB_OAUTH_AUTHORIZATION_URL,
	'client_id': GITLAB_OAUTH_CLIENT_ID,
	'redirect_uri': `http://localhost:${SERVER_PORT}/cb`,
	'authentication_uri': `http://localhost:${SERVER_PORT}/auth`,
	'state': Math.floor(Math.random() * 999999),
	'scope': 'openid%20profile%20email',
	}

	let server;

	const log = (m, ...o) => console.log(m, ...o);

	const deviceLoginPage = `
	<body style="font-family: 'Trebuchet MS', 'Lucida Sans Unicode', 'Lucida Grande', 'Lucida Sans', Arial, sans-serif">
	<script>
	let originalHash = window.location.hash;
	window.location.hash = '';
	let accessToken;
	let tokenType;
	let state;
	if (originalHash.split('#').length == 2) {
	for (var param of originalHash.split('#')[1].split('&')){
	let paramName = param.split('=')[0]
	let paramValue = param.split('=')[1]
	console.log(paramName, ' ', paramValue )

	if (paramName === 'access_token'){
	accessToken = paramValue;
	}

	if (paramName === 'token_type'){
	tokenType = paramValue;
	}

	if (paramName === 'state'){
	state = paramValue;
	}
	}
	}

	if (accessToken && state) {
	fetch(
	'auth',
	{
	method: 'post',
	headers: {
	"Content-type": "application/json; charset=UTF-8"
	},
	body: JSON.stringify({ "accessToken": accessToken, "state": state })
	}
	).then(()=> console.log('Request succeeded!')).catch((error) => console.log('Request failed', error));
	setTimeout(window.close, 1000)
	} else {
	let title = document.createElement('h4');
	title.textContent = 'Invalid authentication request!'
	}
	</script>
	</body>
	`
	const terminate = () => {
	server.close()
	setImmediate(()=> server.emit('close'))
	process.exit(0)
	}

	const requestListener = function (req, res) {
	if (req.url.startsWith('/cb') && req.method === 'GET') {
	res.setHeader('Cache-Control', 'no-cache, no-store, max-age=0')
	res.writeHead(200);
	res.end(deviceLoginPage);
	}

	if (req.url.startsWith('/auth') && req.method === 'POST') {
	let body = '';
	req.on('data', chunk => {
	body += chunk;
	});
	req.on('end', () => {
	res.end();
	authentication = JSON.parse(body)
	var accessToken = authentication.accessToken
	var state = authentication.state

	if(accessToken && state && String(state) == String(config.state)) {
	log("\nSuccessfully authenticated!")
	terminate()
	} else {
	log("\nAuthentication failed!")
	terminate()
	}
	});
	}
	}

	const login = ()=> {
	base_url = config['base_url']
	client_id = config['client_id']
	redirect_uri = config['redirect_uri']
	state = config['state']
	scope = config['scope']

	login_url = `${base_url}?client_id=${client_id}&redirect_uri=${redirect_uri}&response_type=token&state=${state}&scope=${scope}`

	log(`\nClick or copy and paste this link in your browser: \n\n${login_url}`)
	server = http.createServer(requestListener);
	server.listen(SERVER_PORT);
	}

	login(config)