javascript - Passport Facebook Strategy, trigger route with AJAX -

the problem: xmlhttprequest cannot load https://www.facebook.com/dialog/oauth?response_type=code&redirect_uri=http%…lhost%3a8080%2fapi%2fauth%2ffacebook%2fcallback&client_id=1527429390857121. no 'access-control-allow-origin' header present on requested resource. origin 'http://localhost:8080' therefore not allowed access.

if click link in error autenticated , datas in json. if remove clientside js router everithing works fine. trying build spa app.

i don't use specific frontend framework, use flatiron director router , generate view handlebars.

on clientside:

 var facebook = function () {         console.log('get /auth/facebook');          $.ajax({         url: '/api/auth/facebook',         type: 'get',         datatype: 'jsonp',         cache: false        });     };  // routes =============================== var routes = {     ...     '/auth': {         '/facebook' : facebook,         '/twitter' : twitter,         '/google': google     },     ... }; 

on serverside:

    // send facebook authentication     router.get('/auth/facebook', passport.authenticate('facebook'));      // handle callback after facebook has authenticated user     router.get('/auth/facebook/callback', function(req, res, next) {         passport.authenticate('facebook', function (err, user, info) {             if (err) return next(err);             if (!user) return res.status(403).json(info);              req.login(user, function (err) {                 if (err) { return next(err); }                 return res.json({user: user, message: info});             });         })(req, res, next);     }); 

in server.js

... app.use('/api', router); ... 

it seems cors issue:

try following:

$ npm install cors

then, in server.js:

var cors = require('cors'); ... app.use(cors());

for more details on cors module: https://www.npmjs.com/package/cors

and on cors , ajax: http://www.bennadel.com/blog/2327-cross-origin-resource-sharing-cors-ajax-requests-between-jquery-and-node-js.htm