middlewares/cache.js


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;(function () {
  'use strict'

  var cacheMiddleware = {
    cache: cache
  }

  function cache (cache) {
    return function (req, res, next) {
      // If we want explicitly a cache
      // Or if we don't specify if we want a cache or no and we are in production
      if (cache === true || (cache !== false && process.env.NODE_ENV === 'production')) {
        res.setHeader('Cache-Control', 'public')
      } else {
        res.setHeader('Cache-Control', 'no-cache, no-store, max-age=0, must-revalidate')
      }

      next()
    }
  }

  // ---------------------------------------------------------------------------

  module.exports = cacheMiddleware
})()