server.js

var express = require('express'),
    helpers = require('./helpers'),
    pdc = require('pdc');

this.server = express();
this.server.set('views', './views');
this.server.set('view engine', 'ejs');
this.server.use(express.static('public'));

this.server.get('/', function(req, res) {
  res.render('index');
});

this.server.post('/:format', function(req, res) {
  var contentType = req.get('Content-Type');
  
  if (contentType) {
    var from = contentType.split("/")[1];
    var to = req.params.format;
  
    helpers.getBody(req, function(body) {
      pdc(body, from, to, function(err, result) {
        if (err) res.sendStatus(400)
          else res.append('Content-Type', 'text/' + to).send(result);
      });
    });  
  } else res.sendStatus(400) 
});

exports.listen = function(port) {
  this.server.listen(port);
  console.log("Express server listening on port %d", port);
};