Help with socket.io
Phil Daws
Thanks, Phil
mscdex
> When I run node index.js I receive:
>
> node.js:218
> throw e; // process.nextTick error, or 'error' event on first tick
> ^
> ReferenceError: server is not defined
= io.listen(server);
Phil Daws
the problem is that the server variable is being defined in server.js as that is where the web server is created and the socket.io binds to the listening port. As I have split it into separate modules it is though I should somehow being making the variable global so that it can be referenced.
--
Thanks, Phil
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Phil Daws
server.start(asterisk);
and then in server.js I changed the start function to be:
function start(asterisk) {
...
...
asterisk()
}
asterisk.js has then been updated to export itself as:
function asterisk() {
}
exports.asterisk = asterisk;
if I then run node index.js and the server does begin to start but when it hits the asterisk call I receive:
[uxbod@cyborg asterisk]$ node index.js
info - socket.io started
info - Web server has started on port 8080
node.js:218
throw e; // process.nextTick error, or 'error' event on first tick
^
TypeError: object is not a function
at Object.start (/home/uxbod/Development/nodejs/asterisk/server.js:33:5)
at Object.<anonymous> (/home/uxbod/Development/nodejs/asterisk/index.js:4:8)
at Module._compile (module.js:446:26)
at Object..js (module.js:464:10)
at Module.load (module.js:353:32)
at Function._load (module.js:310:12)
at Array.0 (module.js:484:10)
at EventEmitter._tickCallback (node.js:209:41)
I thought by passing asterisk as a function to the server then the socket would be available to the asterisk function ? Confused ?!?!? :(
mscdex
> Okay, I have changed the code around now so that index.js contains:
>
> server.start(asterisk);
>
> and then in server.js I changed the start function to be:
>
> function start(asterisk) {
> ...
> ...
> asterisk()
>
> }
>
> asterisk.js has then been updated to export itself as:
>
> function asterisk() {}
>
> exports.asterisk = asterisk;
>
server.start(), then you need to either: instead call
asterisk.asterisk() inside server.js, change index.js to instead do
server.start(asterisk.asterisk), or make asterisk.js do
`module.exports = asterisk;` instead of `exports.asterisk = asterisk;`
mscdex
> the problem is that the server variable is being defined in server.js as that is where the web server is created and the socket.io binds to the listening port. As I have split it into separate modules it is though I should somehow being making the variable global so that it can be referenced.
to outside variables.
Phil Daws
--
Thanks, Phil
mscdex
> mscdex, appreciate your help but I must be tired I think as I cannot even get a simple app to work ie. http + socket.io; set up a webserver and write out a page that has a div element, and then push a piece of text from the app to that element ;(
easily (along with a client example): http://socket.io/#how-to-use
You should be able to quickly modify that example for your needs.
Phil Daws
I guess with it all being new it is taking a while to sync in :) I now have a server and a client that when I go to the web page and enter the URL it displays the data that has been emitted. The next step was to have the web page automatically update every few seconds so that new events would automatically update the div. This is the HTML I tried:
<html><head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<script src="/socket.io/socket.io.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>
<script language="javascript">
var socket = io.connect("http://localhost");
var auto_refresh = setInterval( function() {
socket.on("event", function(data) {
$("#event_text").text(data.exten);
})
}, 2000);
</script>
</head>
<body>
<b>Some event happened=<div id="event_text"></div></b>
</body>
</html>
Now if I click on refresh it works fine; but I am wondering that when the setInterval is wrapper around the socket.on() it fails to contact the server side again.
How would you approach it as I don't want to refresh the whole page just the indivdual div element.
--
Thanks, Phil
mscdex
> socket.on("event", function(data) {
> $("#event_text").text(data.exten);})
> }, 2000);
handler once and the 'event' event handler will be executed every time
a 'event' is emitted on the server.
If your asterisk.js is similar to what it initially was, then you're
not emitting events correctly. Try this instead:
var io = require('socket.io').listen(server);
// .....
event.on('peerstatus', function(data) {
io.sockets.emit('event', data);
});
This will emit an event called 'event' on the client-side, with the
data object sent as the only argument. So on the client side you can
then properly access data.status, data.extlen, etc from your event
handler.
Marty Nelson
Phil Daws
--
Thanks, Phil