text: /**
   * This file provided by Facebook is for non-commercial testing and evaluation
   * purposes only. Facebook reserves all rights not expressly granted.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
   * FACEBOOK BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
   * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
   * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
   */
  
  var fs = require('fs');
  var path = require('path');
  var express = require('express');
  var bodyParser = require('body-parser');
  var app = express();
  
  app.set('port', (process.env.PORT || 3000));
  
  app.use('/', express.static(path.join(__dirname, 'public')));
  app.use(bodyParser.json());
  app.use(bodyParser.urlencoded({extended: true}));
  
  app.get('/comments.json', function(req, res) {
    fs.readFile('comments.json', function(err, data) {
      res.setHeader('Cache-Control', 'no-cache');
      res.json(JSON.parse(data));
    });
  });
  
  app.post('/comments.json', function(req, res) {
    fs.readFile('comments.json', function(err, data) {
      var comments = JSON.parse(data);
      comments.push(req.body);
      fs.writeFile('comments.json', JSON.stringify(comments, null, 4), function(err) {
        res.setHeader('Cache-Control', 'no-cache');
        res.json(comments);
      });
    });
  });
  
  
  app.listen(app.get('port'), function() {
    console.log('Server started: http://localhost:' + app.get('port') + '/');
  });
  