Question: Setting Acess Token for Multi-User authentification about vimeo.js

[Dashron]

It depends on your use case.

If all of your Vimeo API requests will be authenticated as a single user (such as if you are building a website that only makes API calls to retrieve https://vimeo.com/dashron's videos) then you can create the library outside of the routes and assign the access token there too.

If your Vimeo API requests will be authenticated by different users depending on who is using your website, you should construct a new Vimeo object within each route, such as below:

// renders a link that redirects the user to vimeo auth
app.get('/', (req, res, next) => {
  const vimeo = new Vimeo(VIMEO_CLIENT_ID, VIMEO_CLIENT_SECRET);
  const vimeoState = 1; // TODO: change to generate random string
  const loginUrl = vimeo.buildAuthorizationEndpoint(VIMEO_REDIRECT_URL, VIMEO_SCOPES, vimeoState);
  res.render('index', {loginUrl});
});

// handle response
app.get('/auth', (req, res, next) => {
  const vimeo = new Vimeo(VIMEO_CLIENT_ID, VIMEO_CLIENT_SECRET);
  const code = req.query.code;
  const state = req.query.state;

  vimeo.accessToken(code, VIMEO_REDIRECT_URL, (err, token) => {
    if (err) { return next(err); }

    if (token.access_token) {
      // Note: what to do if multiple users connected?
      vimeo.access_token = token.access_token;
      req.session.vimeo = {token};
    }
  });
});

[renarsvilnis]

Thanks, just as I thought.
Also note for anyone reading it: Good idea to wrap the Vimeo instance creation in an factory-function. So you won't need to reference the client_id, ... all the time.

[Dashron]

Totally agree about the factory function. In my personal work I tend to have something like...

/src/lib/Vimeo.js

const config = require('config');
const Vimeo = require('vimeo');

module.exports = function getVimeoLib () {
    return new Vimeo(config.get('vimeo.client_id'), config.get('vimeo.client_secret'));
};

Which my code can use like this:

var lib = require('./src/lib/vimeo.js').getVimeoLib();
// use the lib