title: How to disable webpage caching in ExpressJS + NodeJS?
body: <p>By default, my browser caches webpages of my ExpressJS app.</p>
  
  <p>This is causing a problem to my login system (users not logged in can open old cached pages of logged in users).</p>
  
  <p>How do I disable this caching?</p>
  
  <p>EDIT:</p>
  
  <p>My <code>app.js</code> (main file):</p>
  
  <pre><code>var express = require('express');
  var http = require('http');
  var path = require('path');
  
  var store = require('./routes/store');
  var app = express();
  
  app.configure(function(){
    app.set('port', process.env.PORT || 3012);
    app.set('views', __dirname + '/views');
    app.set('view engine', 'jade');
    app.use(express.favicon());
    app.use(express.logger('dev'));
    app.use(express.bodyParser());
    app.use(express.methodOverride());
    app.use(express.cookieParser('your secret here'));
    app.use(express.session());
    app.use(app.router);
    app.use(require('stylus').middleware(__dirname + '/public'));
    app.use(express.static(path.join(__dirname, 'public')));
  });
  
  app.configure('development', function(){
    app.use(express.errorHandler());
  });
  
  app.get('/', store.home);
  app.post('/', store.home);
  
  
  
  app.get('/addProblem', store.addProblem);
  app.post('/addProblem', store.addProblem);
  
  app.get('/problem', store.problem);
  app.post('/problem', store.problem);
  
  app.get('/problemList', store.problemList);
  app.post('/problemList', store.problemList);
  
  app.get('/main', store.main);
  app.post('/main', store.main);
  
  app.post('/login', store.login);
  app.get('/login', store.login);
  
  app.get('/createProblem', store.createProblem);
  app.post('/createProblem', store.createProblem);
  
  app.post('/register', store.register);
  app.get('/register', store.register);
  
  app.post('/evaluate', store.evaluate);
  app.get('/evaluate', store.evaluate);
  
  app.get('/logout', store.logout);
  app.post('/logout', store.logout);
  
  http.createServer(app).listen(app.get('port'), function(){
    console.log("Express server listening on port " + app.get('port'));
  });
  </code></pre>