Question

Let’s say I have this simple code that responds with a .XML file.

app.post '/incoming', (req,res) ->
    console.log "Hello, incoming call!"
    message = req.body.Body
    from = req.body.From

    sys.log "From: " + from + ", Message: " + message 

    test = "hello"
    r = new Twiml.Response()
    r.append(new Twiml.Say('Hello, there!' + test + ' Enter your ATM card PIN'))
    console.log(r.toString())

    res.send r.toString()

Is it possible that if 2 requests come at the same time, one gets the wrong response? I’m asking this because I don’t fully understand how async works and if this is doing what I want it to do.

Thanks

Answer 1

If you want to know which client the response goes to, remove all code from the body apart from code that interacts with res like so :

app.post '/incoming', (req,res) ->
    res.send r.toString()

Now you can see that your sending r.toString() to the correct response.

Is it possible that if 2 requests come at the same time,

Even if 2 requests come at the same time, javascript is single threaded and blocking so there are never any race conditions.