Twitter Media Upload using Node OAuth

gistfile1.js

// there are proprietary objects here not included in this unpolished snippet
// but you should get the gist

var OAuth = require('oauth');

var oauth = new OAuth.OAuth(
  'https://api.twitter.com/oauth/request_token',
  'https://api.twitter.com/oauth/access_token',
  consumer_key,
  consumer_secret,
  '1.0A',
  'http://yourdomain.com:8080/twitter/oauth',
  'HMAC-SHA1'
);

// in my use case I've confirmed user has the required credentials
// otherwise they are generated with browser Twitter log in

userService.getUser('KrBbjuDXej', function (user) {
  var key = data.key + '.jpg';
  var keySplit = key.split('/');
  var filename = keySplit[keySplit.length - 1];
  var tokens = user.get('tokens');
  return s3.getObject({
    Bucket: 'fashionweek',
    Key: key
  },
  function (err, data) {
    oauth.post('https://upload.twitter.com/1.1/media/upload.json',
    tokens.twitter.oauth_access_token,
    tokens.twitter.oauth_access_token_secret,
    { media_data: data.toString('base64') },
    '',
    function (err, data, res) {
      if (err) {
        throw err;
      }
      data = JSON.parse(data);
      cb(data.media_id_string);
    });
  });
});

The code above leaves hints for handling authentication. In my case I'm using 3-legged authorization after oauth object is created in order to generate the access token and secret.

In the callback cb, you would then attach the media id(s) to your status update request > https://dev.twitter.com/rest/reference/post/statuses/update

Docs for media/upload > https://dev.twitter.com/rest/reference/post/media/upload

Note that you should use media_id_string value instead of the numeric option, which breaks in JavaScript. https://twittercommunity.com/t/media-upload-returning-different-media-id-and-media-id-string-today/37158