Mi secuencia de comandos app.js

 var express_session = require('express-session'); var session = express_session({ secret: 'secretkey', resave: true, saveUninitialized: true, cookie: { maxAge: 60 * 60 * 1000 }, }); var indexRouter = require('./routes/index'); var usersRouter = require('./routes/users'); var app = express(); // view engine setup app.set('views', path.join(__dirname, 'views')); app.set('view engine', 'pug'); app.use(cookieParser('secretkey')); app.use(session); app.use(logger('dev')); app.use(fileUpload()); app.use(express.json()); app.use(express.urlencoded({ extended: false })); app.use(express.static(path.join(__dirname, 'public'))); app.use('/', indexRouter); app.use('/users', session, usersRouter); // 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) { // set locals, only providing error in development res.locals.message = err.message; res.locals.error = req.app.get('env') === 'development' ? err : {}; // render the error page res.status(err.status || 500); res.render('error'); }); module.exports = app;

Mi script de usuarios.js

 var express = require('express'); var router = express.Router(); router.get('/enter', function(req, res, next) { req.session.user = req.query.username; res.redirect('/users/login'); }); module.exports = router;

Pero req.session no está definido TypeError: No se pueden establecer propiedades de indefinido (configurando 'usuario') Coloqué app.use(session) antes de las rutas, pero aún así no funciona. Intenté agregar una sesión en app.use('/', session, indexRouter), no funcionó.

/// ACTUALIZAR Cambié mi indexRouter , ¡ahora funciona!:

 var express = require('express'); var router = express.Router(); var express_session = require('express-session'); var session = express_session({ secret: 'secret', resave: true, saveUninitialized: true, cookie: { maxAge: 24 * 60 * 60 * 1000 }, }); router.use(session); router.get('/', function(req, res, next) { if(req.session && req.session.user){ res.render('index', { title: 'Adviser', user: req.session.user }); } else { res.redirect('/users/login'); } }); module.exports = router;

Gracias Heiko Theißen