Authentication failure with passport middleware never gets invoked - node.js

Question

The following program uses passportjs for username/password authentication. I do not what mistake am I making, but I am always redirected to the failure page, i.e back again to the login page.
var passport = require('passport')
, LocalStrategy = require('passport-local').Strategy
, express = require('express');
var app = express();
app.listen(3000);
app.use(express.static(__dirname+'/public'));
app.use(passport.initialize());
app.use(passport.session());
passport.use(new LocalStrategy(
function(username, password, done) {
console.log(username + ':username');
console.log(password + ':password');
return done(null, [{username:'foo'}]);
}
));
app.get('/login',(req,resp) => {
var options = {
root: __dirname + '/public/'
};
resp.sendFile('login.html',options);
});
app.post('/login',
passport.authenticate('local', { successRedirect: '/',failureRedirect: '/login'})
);
I am trying to understand the working of passportjs and I see that the middleware passport.use(new LocalStrategy( never gets invoked. I do not know the reason but may be it could be the root cause of failure.

Answer 1

So I was missing body parser module required by passportjs to parse the post request. Here is the complete code:
var passport = require('passport')
, LocalStrategy = require('passport-local').Strategy
, express = require('express')
, bodyParser = require('body-parser');
var app = express();
app.listen(3000);
app.use(express.static(__dirname+'/public'));
app.use(bodyParser.urlencoded({ extended: false }));// parse application/x-www-form-urlencoded
app.use(bodyParser.json()); // parse application/json
app.use(passport.initialize());
app.use(passport.session());
passport.use('local',new LocalStrategy(
function(username, password, done) {
console.log(username + ':username');
console.log(password + ':password');
return done(null, {username:username});
}
));
passport.serializeUser(function(user, done) {
done(null, user.username);
});
passport.deserializeUser(function(id, done) {
done(null, user);
});
app.get('/login',(req,resp) => {
var options = {
root: __dirname + '/public/'
};
resp.sendFile('login.html',options);
});
app.post('/login',
passport.authenticate('local', { successRedirect: '/',failureRedirect: '/login'})
);

Answer 2

Maybe passport need session try add app.use(express.session({ secret: 'keyboard cat' })); before passport config.
You must name your strategy and serialize user
passport.serializeUser(function(user, done) {
done(null, user);
});
passport.use('local', new LocalStrategy(
function(username, password, done) {
console.log(username + ':username');
console.log(password + ':password');
return done(null, [{username:'foo'}]);
}
));
You call this strategy by name in this eg local
app.post('/login',
passport.authenticate('local', { successRedirect: '/',failureRedirect: '/login'})
);