OAuth Request Token (HTTPS POST Request)

gistfile1.js

// An object of options to indicate where to post to
  var post_options = {
      host: 'api.mercadolibre.com',
      port: '443',
      path: util.format("/oauth/token?grant_type=authorization_code&client_id=%s&client_secret=%s&code=%s&redirect_uri=" + callbackUri, 
            config.clientId, config.clientSecret, encodeURIComponent(code)),
      secureProtocol: 'SSLv3_method',
      agent: false,
      method: 'POST',
      headers: {
          'Content-Type': 'application/x-www-form-urlencoded',
          'Content-Length': 0
      }
  };

  // Set up the request
  var post_req = https.request(post_options, function(response) {
      response.on('data', function (chunk) {
          console.log('Response: ' + chunk);
          res.send('Response: ' + chunk);
      });
  });

  post_req.on('error', function(e) {
    console.error(e);
  });

  // post the data
  post_req.end();