socket.io in Jmeter - socket.io

Question

I studied a sample from this link http://socket.io/docs/
Example
<script src="/socket.io/socket.io.js"></script>
<script src="http://code.jquery.com/jquery-1.11.1.js"></script>
<script>
var socket = io('ws://127.0.0.1:3000');
socket.emit('ui:index:loaded',{_id: '123456'});
socket.on('app:banner:loaded',function(obj){
console.log(obj);
});
socket.on('app:collection:loaded',function(obj){
console.log(obj);
});
</script>
How to use this in Jmeter?
Now, I request 2probe, it response 3probe.
I need to send event
Anyone have ideas.

Answer 1

There is a super late answer for anyone still needs it.
I used Chrome dev tools and tried to see what happened when a event emitted. I found that there was a http POST request sent when emitting event, so what I did was creating a same http request by jmeter, and it works.
In my case, the event name is "join", and the content is
{"sn":"1522729528413MDSCDGE","vsn":"093"}
Here is what I've found in Chrome's Network tab
And here is a HTTP Request Sampler I created by jmeter.
I think the number 52 means the string length of your event content. If you want to change your event content, remember to calculate a correct length, and I don't know what 42 means. I just copied it.
Hope this helps.

Answer 2

JMeter doesn't support WebSocket testing out-of-the-box, you will need either to use the plugin or to write some code in JSR223 Sampler
If you want to go the "plugin way":
Download and install JMeter Plugins Manager
From JMeter main menu select Options -> Plugins Manager -> Available Plugins -> Websocket Protocol Support
After the plugin installation you should be able to add the WebSocket Sampler. Appropriate configuration will look like:
Server Name or IP: localhost
Port Number: 3000
Protocol: ws
Request Data: {_id: '123456'}
You will also need to add some form of expected response into the "WebSocket Response" stanza.
See WebSocket Testing With Apache JMeter guide for more information on using the plugin and manually sending WebSocket messages via Groovy code.