index.js

// routes/index.js

module.exports = function(server) {
  server.pre(function (req, res, next) {
    console.log(req.body);  // prints "undefined"

    return next();
  });
  
  // snip
  
  var twilio = require('twilio');
  server.post({ path: '/sms/questions', version: [semVer] }, function(req, res) {
    var twiml = new twilio.TwimlResponse();
    twiml.message(util.format('You asked: "%s"', req.body.question));

    res.header('Content-Type', 'text/xml');
    return res.send(twiml.toString());
  });
}

server.js

var restify = require('restify');
var config = require('./config.js')();

var server = restify.createServer(config.server);

server.use(restify.acceptParser(server.acceptable));
server.use(restify.authorizationParser());
server.use(restify.dateParser(300));
server.use(restify.queryParser());
server.use(restify.gzipResponse());
server.use(restify.bodyParser());

require('./routes')(server);
server.listen(server.config.port, '127.0.0.1', function() {
  console.log('%s (API v%s) listening at %s', server.name, server.config.version, server.url);
});