Function fast

server_setup.js:253–278

var setupQuickBailToMainHTML = function(app) {

  const fast = template => (function(req, res, next) {
    let features;
    req.features = (features = {});

    if (config.isProduction || true) {
      res.header('Cache-Control', 'public, max-age=60');
      res.header('Expires', 60);
    } else {
      res.header('Cache-Control', 'no-cache, no-store, must-revalidate');
      res.header('Pragma', 'no-cache');
      res.header('Expires', 0);
    }

    if (/(cn\.codecombat\.com|koudashijie|aojiarui)/.test(req.get('host'))) {
      features.china = true;
      if ((template === 'home.html') && (config.product === 'codecombat')) {
        template = 'home-cn.html';
      }
    }

    if (config.chinaInfra) {
      features.chinaInfra = true;
    }

    return renderMain(template, req, res);
  });

  app.get('/', fast('home.html'));
  app.get('/home', fast('home.html'));