Can I set up socket.io chat on heroku?

Question

I have a simple socket.io chat application which I\'ve uploaded to one of the new Heroku \'cedar\' stacks.

Now I almost have everything working but I\'ve hit one stumbli

Answer 1

I was able to get Socket.IO v0.8 to work on Heroku Cedar by doing the following:

Within the Express app (in CoffeeScript in my case):

app = express.createServer();
socket = require("socket.io")

...

io = socket.listen(app);
io.configure () ->
  io.set("transports", ["xhr-polling"])
  io.set("polling duration", 10)

io.sockets.on('connection', (socket) ->
  socket.on('myaction', (data) ->
    ...
    socket.emit('result', {myData: data})

### The port setting is needed by Heroku or your app won't start
port = process.env.PORT || 3000;
app.listen(port);

And within the front-facing Javascript of your application:

var socket = io.connect(window.location.hostname);
function sendSocketRequest() {
  socket.emit('myaction', $("#some_field").val());
}

socket.on('result', function(data) {
  console.log(data);
}

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Helpful links:

• Heroku Node help
• Heroku Socket.IO help