Messing about with Node.js and a bit nonplussed that I can’t get something this simple working. This code works fine on my local server, but the chat doesn’t work on Heroku. If I enter something, nothing happens. I’ve checked the Heroku logs and they look fine.
package.json
{
"name": "mukhin_chat",
"description": "example chat application with socket.io",
"version": "0.0.1",
"dependencies": {
"express": "2.4.6",
"socket.io": "0.8.4"
},
"engines": {
"node": "0.8.x",
"npm": "1.1.x"
}
}
app.js
// Variable port setting for heroku
var port = process.env.PORT || 3000;
var app = require('express').createServer()
var io = require('socket.io').listen(app);
app.listen(port);
// Heroku setting for long polling - assuming io is the Socket.IO server object
io.configure(function () {
io.set("transports", ["xhr-polling"]);
io.set("polling duration", 10);
});
// routing
app.get('/', function (req, res) {
res.sendfile(__dirname + '/index.html');
});
// usernames which are currently connected to the chat
var usernames = {};
io.sockets.on('connection', function (socket) {
// when the client emits 'sendchat', this listens and executes
socket.on('sendchat', function (data) {
// we tell the client to execute 'updatechat' with 2 parameters
io.sockets.emit('updatechat', socket.username, data);
});
// when the client emits 'adduser', this listens and executes
socket.on('adduser', function(username){
// we store the username in the socket session for this client
socket.username = username;
// add the client's username to the global list
usernames[username] = username;
// echo to client they've connected
socket.emit('updatechat', 'SERVER', 'you have connected');
// echo globally (all clients) that a person has connected
socket.broadcast.emit('updatechat', 'SERVER', username + ' has connected');
// update the list of users in chat, client-side
io.sockets.emit('updateusers', usernames);
});
// when the user disconnects.. perform this
socket.on('disconnect', function(){
// remove the username from global usernames list
delete usernames[socket.username];
// update list of users in chat, client-side
io.sockets.emit('updateusers', usernames);
// echo globally that this client has left
socket.broadcast.emit('updatechat', 'SERVER', socket.username + ' has disconnected');
});
});
index.html
<script src="/socket.io/socket.io.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.6.4/jquery.min.js"></script>
<script>
var socket = io.connect('http://localhost:8080');
// on connection to server, ask for user's name with an anonymous callback
socket.on('connect', function(){
// call the server-side function 'adduser' and send one parameter (value of prompt)
socket.emit('adduser', prompt("What's your name?"));
});
// listener, whenever the server emits 'updatechat', this updates the chat body
socket.on('updatechat', function (username, data) {
$('#conversation').append('<b>'+username + ':</b> ' + data + '<br>');
});
// listener, whenever the server emits 'updateusers', this updates the username list
socket.on('updateusers', function(data) {
$('#users').empty();
$.each(data, function(key, value) {
$('#users').append('<div>' + key + '</div>');
});
});
// on load of page
$(function(){
// when the client clicks SEND
$('#datasend').click( function() {
var message = $('#data').val();
$('#data').val('');
// tell server to execute 'sendchat' and send along one parameter
socket.emit('sendchat', message);
});
// when the client hits ENTER on their keyboard
$('#data').keypress(function(e) {
if(e.which == 13) {
$(this).blur();
$('#datasend').focus().click();
}
});
});
</script>
<div style="float:left;width:100px;border-right:1px solid black;height:300px;padding:10px;overflow:scroll-y;">
<b>USERS</b>
<div id="users"></div>
</div>
<div style="float:left;width:300px;height:250px;overflow:scroll-y;padding:10px;">
<div id="conversation"></div>
<input id="data" style="width:200px;" />
<input type="button" id="datasend" value="send" />
</div>
Procfile
web: node app.js
Logs
2012-08-15T01:24:03+00:00 heroku[web.1]: State changed from up to starting
2012-08-15T01:24:03+00:00 heroku[slugc]: Slug compilation finished
2012-08-15T01:24:05+00:00 heroku[web.1]: Starting process with command `node app.js`
2012-08-15T01:24:05+00:00 heroku[web.1]: Stopping all processes with SIGTERM
2012-08-15T01:24:07+00:00 heroku[web.1]: Process exited with status 1
2012-08-15T01:24:08+00:00 app[web.1]: info - socket.io started
2012-08-15T01:24:09+00:00 heroku[web.1]: State changed from starting to up
2012-08-15T01:24:21+00:00 heroku[router]: GET still-bastion-7144.herokuapp.com/ dyno=web.1 queue=0 wait=0ms service=23ms status=200 bytes=1774
2012-08-15T01:24:21+00:00 app[web.1]: debug - served static /socket.io.js
2012-08-15T01:24:21+00:00 heroku[router]: GET still-bastion-7144.herokuapp.com/socket.io/socket.io.js dyno=web.1 queue=0 wait=0ms service=15ms status=200 bytes=95997
2012-08-15T01:24:23+00:00 heroku[router]: GET still-bastion-7144.herokuapp.com/favicon.ico dyno=web.1 queue=0 wait=0ms service=3ms status=404 bytes=34
2012-08-15T01:24:45+00:00 heroku[router]: GET still-bastion-7144.herokuapp.com/ dyno=web.1 queue=0 wait=0ms service=7ms status=200 bytes=1774
2012-08-15T01:24:45+00:00 app[web.1]: debug - served static /socket.io.js
2012-08-15T01:24:45+00:00 heroku[router]: GET still-bastion-7144.herokuapp.com/socket.io/socket.io.js dyno=web.1 queue=0 wait=0ms service=18ms status=200 bytes=95997
2012-08-15T01:24:50+00:00 heroku[router]: GET still-bastion-7144.herokuapp.com/ dyno=web.1 queue=0 wait=0ms service=6ms status=304 bytes=0
2012-08-15T01:24:51+00:00 app[web.1]: debug - served static /socket.io.js
2012-08-15T01:24:51+00:00 heroku[router]: GET still-bastion-7144.herokuapp.com/socket.io/socket.io.js dyno=web.1 queue=0 wait=0ms service=14ms status=200 bytes=95997
In your client code you’re trying to connect to port 8080, which is inconsistent with the port your server is listening on.