Sample Tropo app written in Node.js with the Express Framework.

tropo.js

/**
 * Sample Tropo app written in Node.js with the Express Framework.
 */

var tropo = require('tropo-webapi');
var express = require('express');

var port = process.ARGV[2] || 8000;
var app = express.createServer();

// Required to process the body of HTTP responses from Tropo.
app.configure(function(){
	app.use(express.bodyDecoder());
});

// Base route, plays welcome message.
app.post('/', function(req, res){

	var tropo = new TropoWebAPI();
	tropo.say("Welcome to the Tropo Web API node demo.");
	tropo.on("continue", null, "/start", true);
	res.send(TropoJSON(tropo));
	
});

// Route to start asking caller for selection.
app.post('/start', function(req, res){
	
	var tropo = new TropoWebAPI();
	
	// Set up options for question to ask caller.
	var choices = new Choices("Node JS, PHP, Ruby, Python, Scala");
	var attempts = 3; 
	var bargein = false;
	var minConfidence = null; // Use the platform default.
	var name = "test";
	var recognizer = "en-us";
	var required = true;
	var say = new Say("What is your favorite programming language?");
	var timeout = 5; 
	var voice = "Allison";	
	tropo.ask(choices, attempts, bargein, minConfidence, name, recognizer, required, say, timeout, voice);
	
	tropo.on("continue", null, "/answer", true);
	tropo.on("error", null, "/error", true);
    res.send(TropoJSON(tropo));
    
});

// Route to handle valid answers.
app.post('/answer', function(req, res){
	
	var tropo = new TropoWebAPI();
	var selection = req.body['result']['actions']['value'];
	tropo.say('You chose, ' + selection + '. Thanks for playing.');
	tropo.hangup();
	res.send(TropoJSON(tropo));
	
});

// Route to handle errors or invalid responses.
app.post('/error', function(req, res){
	
	var tropo = new TropoWebAPI();
	tropo.say("Whoops, something bad happened. Please try again later.");
	res.send(TropoJSON(tropo));
	
});

app.listen(port);
console.log('Tropo demo running on port: ' + port);