github-device-code-grant.js

// "dependencies": {
//    "axios": "^1.3.6"
// }
const axios = require('axios');

const CLIENT_ID = '<client_id_aqui>';

async function run(token) {
    console.log(token);
}

async function main() {
    const {
        device_code,
        user_code,
        verification_uri,
        expires_in,
        interval,
    } = (await axios.post(
        'https://github.com/login/device/code',
        {
            client_id: CLIENT_ID,
            scope: 'public_repo user:email',
        },
        {
            headers: {
                'Content-Type': 'application/json',
                'Accept': 'application/json',
            },
        },
    )).data;
    const expireDate = Date.now() + (expires_in * 1000);

    // Informar usuario
    console.log('Acesse essa url: ' + verification_uri);
    console.log('E informe o código: ' + user_code);

    const intervalHandler = setInterval(async () => {
        const currentDate = Date.now();
        if (currentDate >= expireDate) {
            clearInterval(intervalHandler);
            console.error('Authentication expired');
            return;
        }

        const { data } = await axios.post(
            'https://github.com/login/oauth/access_token',
            {
                grant_type: 'urn:ietf:params:oauth:grant-type:device_code',
                client_id: CLIENT_ID,
                device_code: device_code,
            },
            {
                headers: {
                    'Content-Type': 'application/json',
                    'Accept': 'application/json',
                },
            },
        );

        if (data.error) {
            switch (data.error) {
                case 'authorization_pending':
                    console.log('Waiting for authorization...');
                    break;
                case 'expired_token':
                    clearInterval(intervalHandler);
                    console.error('Authentication expired');
                    break;
                default:
                    clearInterval(intervalHandler);
                    console.error('Unknown error', data);
                    break;
            }
        } else {
            clearInterval(intervalHandler);
            run(data);
        }
    }, interval * 2000);
}

main();