I am having trouble getting my system to log out with PassportJS. It seems the logout route is being called, but its not removing the session. I want it to return 401, if the user is not logged in in specific route. I call authenticateUser to check if user is logged in.
Thanks a lot!
/******* This in index.js *********/
// setup passport for username & passport authentication
adminToolsSetup.setup(passport);
// admin tool login/logout logic
app.post("/adminTool/login",
passport.authenticate('local', {
successRedirect: '/adminTool/index.html',
failureRedirect: '/',
failureFlash: false })
);
app.get('/adminTool/logout', adminToolsSetup.authenticateUser, function(req, res){
console.log("logging out");
console.log(res.user);
req.logout();
res.redirect('/');
});
// ******* This is in adminToolSetup ********
// Setting up user authentication to be using user name and passport as authentication method,
// this function will fetch the user information from the user name, and compare the password for authentication
exports.setup = function(passport) {
setupLocalStrategy(passport);
setupSerialization(passport);
}
function setupLocalStrategy(passport) {
passport.use(new LocalStrategy(
function(username, password, done) {
console.log('validating user login');
dao.retrieveAdminbyName(username, function(err, user) {
if (err) { return done(err); }
if (!user) {
return done(null, false, { message: 'Incorrect username.' });
}
// has password then compare password
var hashedPassword = crypto.createHash('md5').update(password).digest("hex");
if (user.adminPassword != hashedPassword) {
console.log('incorrect password');
return done(null, false, { message: 'Incorrect password.' });
}
console.log('user validated');
return done(null, user);
});
}
));
}
function setupSerialization(passport) {
// serialization
passport.serializeUser(function(user, done) {
console.log("serialize user");
done(null, user.adminId);
});
// de-serialization
passport.deserializeUser(function(id, done) {
dao.retrieveUserById(id, function(err, user) {
console.log("de-serialize user");
done(err, user);
});
});
}
// authenticating the user as needed
exports.authenticateUser = function(req, res, next) {
console.log(req.user);
if (!req.user) {
return res.send("401 unauthorized", 401);
}
next();
}
Brice’s answer is great, but I still noticed an important distinction to make; the Passport guide suggests using .logout()
(also aliased as .logOut()
) as such:
app.get('/logout', function(req, res){
req.logout();
res.redirect('/'); //Can fire before session is destroyed?
});
But as mentioned above, this is unreliable. I found it behaved as expected when implementing Brice’s suggestion like this:
app.get('/logout', function (req, res){
req.session.destroy(function (err) {
res.redirect('/'); //Inside a callback… bulletproof!
});
});
Hope this helps!