How to handle errors in npm passport-facebook module

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I am trying to implement facebook login in node.js with the help of passport-facebook module.



My question is how do I correctly catch the errors thrown by the verify callback function cb(). And how to then pass this error to the /facbook/fail page to show friendly message about it?



// passport init
passport.use(new FacebookStrategy({
clientID: api.CONFIG.fbAuth.clientID,
clientSecret: api.CONFIG.fbAuth.clientSecret,
callbackURL: null,
profileFields: ['id', 'emails', 'name', "birthday", "gender"]
},
function(accessToken, refreshToken, profile, cb) {
return cb("Throw some error"); // throw some error here for testing porpuses
}
));

// routes
router.get('/facebook', function(req, res, next) {
passport.authenticate("facebook", {
scope : ["email", "user_birthday", "user_gender"],
callbackURL: "callbackUrl"
})(req, res, next);
});

router.get('/facebook/callback',
function(req, res, next) {
passport.authenticate("facebook", {
callbackURL: "callbackUrl",
failureRedirect: "failUrl"
})(req, res, next);
},
function(req, res) {
res.send("Facebook authentication successful.");
}
);

router.all("/facebook/fail", failCallback(req, res) {
// get info about the error thrown by cb() function
let error = req.error;
res.send("Facebook authentication failed.");
});









share|improve this question





























    0















    I am trying to implement facebook login in node.js with the help of passport-facebook module.



    My question is how do I correctly catch the errors thrown by the verify callback function cb(). And how to then pass this error to the /facbook/fail page to show friendly message about it?



    // passport init
    passport.use(new FacebookStrategy({
    clientID: api.CONFIG.fbAuth.clientID,
    clientSecret: api.CONFIG.fbAuth.clientSecret,
    callbackURL: null,
    profileFields: ['id', 'emails', 'name', "birthday", "gender"]
    },
    function(accessToken, refreshToken, profile, cb) {
    return cb("Throw some error"); // throw some error here for testing porpuses
    }
    ));

    // routes
    router.get('/facebook', function(req, res, next) {
    passport.authenticate("facebook", {
    scope : ["email", "user_birthday", "user_gender"],
    callbackURL: "callbackUrl"
    })(req, res, next);
    });

    router.get('/facebook/callback',
    function(req, res, next) {
    passport.authenticate("facebook", {
    callbackURL: "callbackUrl",
    failureRedirect: "failUrl"
    })(req, res, next);
    },
    function(req, res) {
    res.send("Facebook authentication successful.");
    }
    );

    router.all("/facebook/fail", failCallback(req, res) {
    // get info about the error thrown by cb() function
    let error = req.error;
    res.send("Facebook authentication failed.");
    });









    share|improve this question



























      0












      0








      0








      I am trying to implement facebook login in node.js with the help of passport-facebook module.



      My question is how do I correctly catch the errors thrown by the verify callback function cb(). And how to then pass this error to the /facbook/fail page to show friendly message about it?



      // passport init
      passport.use(new FacebookStrategy({
      clientID: api.CONFIG.fbAuth.clientID,
      clientSecret: api.CONFIG.fbAuth.clientSecret,
      callbackURL: null,
      profileFields: ['id', 'emails', 'name', "birthday", "gender"]
      },
      function(accessToken, refreshToken, profile, cb) {
      return cb("Throw some error"); // throw some error here for testing porpuses
      }
      ));

      // routes
      router.get('/facebook', function(req, res, next) {
      passport.authenticate("facebook", {
      scope : ["email", "user_birthday", "user_gender"],
      callbackURL: "callbackUrl"
      })(req, res, next);
      });

      router.get('/facebook/callback',
      function(req, res, next) {
      passport.authenticate("facebook", {
      callbackURL: "callbackUrl",
      failureRedirect: "failUrl"
      })(req, res, next);
      },
      function(req, res) {
      res.send("Facebook authentication successful.");
      }
      );

      router.all("/facebook/fail", failCallback(req, res) {
      // get info about the error thrown by cb() function
      let error = req.error;
      res.send("Facebook authentication failed.");
      });









      share|improve this question
















      I am trying to implement facebook login in node.js with the help of passport-facebook module.



      My question is how do I correctly catch the errors thrown by the verify callback function cb(). And how to then pass this error to the /facbook/fail page to show friendly message about it?



      // passport init
      passport.use(new FacebookStrategy({
      clientID: api.CONFIG.fbAuth.clientID,
      clientSecret: api.CONFIG.fbAuth.clientSecret,
      callbackURL: null,
      profileFields: ['id', 'emails', 'name', "birthday", "gender"]
      },
      function(accessToken, refreshToken, profile, cb) {
      return cb("Throw some error"); // throw some error here for testing porpuses
      }
      ));

      // routes
      router.get('/facebook', function(req, res, next) {
      passport.authenticate("facebook", {
      scope : ["email", "user_birthday", "user_gender"],
      callbackURL: "callbackUrl"
      })(req, res, next);
      });

      router.get('/facebook/callback',
      function(req, res, next) {
      passport.authenticate("facebook", {
      callbackURL: "callbackUrl",
      failureRedirect: "failUrl"
      })(req, res, next);
      },
      function(req, res) {
      res.send("Facebook authentication successful.");
      }
      );

      router.all("/facebook/fail", failCallback(req, res) {
      // get info about the error thrown by cb() function
      let error = req.error;
      res.send("Facebook authentication failed.");
      });






      node.js passport-facebook






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      edited Dec 30 '18 at 20:34







      miXo

















      asked Dec 30 '18 at 20:19









      miXomiXo

      698




      698
























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