node.js - Passport-facebook : 'cannot get /auth/facebook/callback?code= {callback_code} -

i'm incorporating facebook authentication in app using passport node , express, , mysql db (using bookshelf.js orm). when go log in using facebook, after entering facebook credentials, error 'cannot /auth/facebook/callback?code= {callback_code}'. i've tried following solutions found on stackoverflow: 1, 2, 3, 4

and outside post: 5

none of these have worked.

in fb app account, i've set 'valid oauth redirect uris' inside of client oauth settings 'localhost:8080/auth/facebook/callback', app domain 'localhost', , site url 'localhost:8080/'.

below code. appreciated!

routes:

    module.exports = function (apirouter, passport) {       apirouter.get('/events', isloggedin, eventcontroller.getallevents);       apirouter.post('/events', eventcontroller.addevent);       apirouter.get('/auth/facebook', passport.authenticate('facebook', {scope : ['email ', 'public_profile', 'user_friends']}));       apirouter.get('/auth/facebook/callback',         passport.authenticate('facebook', {failureredirect: '/'}))     }; 

passport config:

passport.use(new facebookstrategy({   clientid        : configauth.facebookauth.clientid,   clientsecret    : configauth.facebookauth.clientsecret,   callbackurl     : 'http://localhost:8080/auth/facebook/callback' }, function(token, refreshtoken, profile, done) {   console.log('looking user fb');   process.nexttick(function() {     console.log('looking user fb inside async');     new user({ 'facebook_id' : profile.id })       .fetch()       .then(function(usermodel) {         if (usermodel) {           return usermodel;         } else {           new user({             facebook_token: token,             first_name: profile.name.givenname,             last_name: profile.name.familyname           }).save()             .then(function(model) {               console.log('new user saved', model);               done(null, model);             },function(error) {               console.log('error saving new user: ', error);               done(error);             });          }          done(null, usermodel);        }, function(error) {          console.log('error: ', error);          done(error);        });    }); }));