It looks like you need to follow the guide on the Juggernaut readme under that line titled Basic Usage.
Basic usage
Everything in Juggernaut is done within the context of a channel.
JavaScript clients can subscribe to a channel which your server can
publish to. First, we need to include Juggernaut's application.js
file. By default, Juggernaut is hosted on port 8080 - so we can just
link to the file there.
<script src="http://localhost:8080/application.js"
type="text/javascript" charset="utf-8">
We then need to instantiate the Juggernaut object and subscribe to the
channel. As you can see, subscribe takes two arguments, the channel
name and a callback.
<script type="text/javascript" charset="utf-8">
var jug = new Juggernaut;
jug.subscribe("channel1", function(data){
console.log("Got data: " + data);
});
</script>
That's it for the client side. Now, to publish to the channel we'll
write some Ruby:
require "juggernaut"
Juggernaut.publish("channel1", "Some data")
You should see the data we sent appear instantly in the open browser
window. As well as strings, we can even pass objects, like so:
Juggernaut.publish("channel1", {:some => "data"})
The publish method also takes an array of channels, in case you want
to send a message to multiple channels co-currently.
Juggernaut.publish(["channel1", "channel2"], ["foo", "bar"])
That's pretty much the gist of it, the two methods - publish and
subscribe. Couldn't be easier than that!
Once you have that done you can implement the Ruby code mentioned above inside a controller which takes the user input from a form and then calls something like Juggernaut.publish("channel1", @user_data)
allowing your users to send data through the server to each other.
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