Redirects on the server with react-router, express and iniquest

server.js

app.use(function(req, res, next) {
  const router = Router.create({
    routes,
    location: req.path
  });

  router.run(function(Handler, state) {
    router.transitionTo = function() {
      const redirectUrl = router.makeHref.apply(router, arguments);
      return Promise.reject({ reason: 'redirect', redirectUrl });
    };

    iniquest.run(state, req, router).then(initialState => {
      const html = React.renderToString(<Handler initialState={initialState} />);
      res.send(render(html, initialState));
    }).catch(err => {
      if (err && err.reason === 'redirect') {
        return res.redirect(err.redirectUrl);
      }

      next(err);
    });
  });
});

users-component.js

// sample component
Users.prepareForRequest = function(req, router) {
  if (req.method === 'POST') {
    return router.transitionTo('some-url', { some: 'param' });
  }

  return RSVP.hash({
    users: users.all()
  });
};