connect-form middleware

app.js

app.get('/upload', checkAuth, function(req, res) {
  res.render('upload');
});

//Doesn't work (times out) if checkAuth is used as middleware, works fine without check auth 
app.post('/upload', checkAuth, function(req, res, next) {
  req.form.complete(function(err, fields, files){
    if (err) {
      next(err);
    } else {
      console.log('\nuploaded %s to %s'
        ,  files.image.filename
        , files.image.path);
      res.redirect('back');
    }
  });
});


function checkAuth(req, res, next) {
  if(req.session.user_id) {
    User.findById(req.session.user_id, function(err, user) {
      if (user) {
        req.session.currentUser = user;
        next();
      } else {
        res.redirect('/sessions/new');
      }
    });
  } else {
    req.flash('You are not logged in!');
    res.redirect('/sessions/new');
  }
}