node.js: express: req.session returns "undefined"

 

>PROBLEM

node.js: express: req.session returns "undefined".

console.log(req.session)

- Returns:

undefined

>SOLUTION

The session block declaration shall come before the routing blocks.

>>BEFORE

// error handler

app.use(function (err, req, res, next) {

  res.locals.message = err.message;

  res.locals.error = req.app.get('env') === 'development' ? err : {};

  res.status(err.status || 500);

  res.render('error');

});

// ...

const session = require('express-session');

app.set('trust proxy', 1) // trust first proxy

app.use(session({

    secret: ConfigSvc.configValue('sessionKey'),

    saveUninitialized:true,

    cookie: { maxAge: oneDay, secure: true },

    resave: false

}));

>>AFTER

var createError = require('http-errors');

var express = require('express');

var path = require('path');

var cookieParser = require('cookie-parser');

var logger = require('morgan');

var indexRouter = require('./routes/index');

var usersRouter = require('./routes/users');

var todoRouter = require('./routes/todo');

var app = express();

// view engine setup

app.set('views', path.join(__dirname, 'views'));

app.set('view engine', 'ejs');

app.use(logger('dev'));

app.use(express.json());

app.use(express.urlencoded({

  extended: false

}));

app.use(cookieParser());

app.use(express.static(path.join(__dirname, 'public')));

var favicon = require('serve-favicon');

const ConfigSvc = require('./utils/ConfigSvc');

app.use(favicon(__dirname + '/public/favicon.ico'));

const oneDay = 8640000;

const session = require('express-session');

app.set('trust proxy', 1) // trust first proxy

app.use(session({

    secret: ConfigSvc.configValue('sessionKey'),

    saveUninitialized:true,

    cookie: { maxAge: oneDay, secure: true },

    resave: false

}));

app.use('/', indexRouter);

app.use('/users', usersRouter);

app.use('/todo', todoRouter);

// catch 404 and forward to error handler

app.use(function (req, res, next) {

  next(createError(404));

});

// error handler

app.use(function (err, req, res, next) {

  res.locals.message = err.message;

  res.locals.error = req.app.get('env') === 'development' ? err : {};

  res.status(err.status || 500);

  res.render('error');

});

>ENV

Node.js 16

Express

JWT