Res.json example

AuthController.js

  callback: function (req, res) {
    passport.callback(req, res, function (err, user) {
      //sails.log.debug("API -> Controllers->AuthControllers->Callback: Found our user, now lets log them in",user);
      req.login(user, function (err) {
        // If an error was thrown, redirect the user to the login which should
        // take care of rendering the error messages.
        if (err) {
          var redirect = req.param('action') === 'register' ? '/#user/register' : '/#user/login';
          if(req.wantsJSON === true) {
            res.json(err.status_code || 403,{
              message: "Authentication Failed, Redirect to "+redirect,
              redirect: redirect,
              err: err
            });
          }
          else {
            res.redirect(redirect);
          }
        }
        // Upon successful login, send the user to the homepage were req.user
        // will available.
        else {
          if(req.wantsJSON === true) {
            res.json({ message: "Success!", user: req.user });
          }
          else {
            res.redirect('/');
          }
        }
      });
    });
  }