Cannot understand how to use WebSocket Samplers on Jmeter

[Vivek Mehta]

Hi, I am trying the samplers for a project and I do not understand how to do load testing of Socket.io and node.js using express.js. These are the details of my project: Link opened: http://127.0.0.1:3000/playtests/view/2b3a35bc-2204-41c7-8347-3ab98df4cecc websocket path defined in node: chatRoomsMessagesAppend: "chat/rooms/messages/append" data needed to be sent: Socket.emitMessage(Definitions.web.chatRoomsMessagesAppend, { "2b3a35bc-2204-41c7-8347-3ab98df4cecc", messageEntry: { text: "HI from Jmeter" } });

Could you please answer the following for me? 1. In server host what should be written? 2. In the port do I write 3000 or 80? 3. what path should be given? 4. how to send the above data in the text field? 5. So basically this is a chat box. When I run the code for 10 users, will 10 users send the message in the chat box? I mean will I see the messages in the chatbox of my website? Will my database save the same message 10 times?

Please get back to me as soon as possible because I need to do load testing of my application ASAP.

[Peter Doornbosch]

Please read https://meta.stackoverflow.com/questions/326569/under-what-circumstances-may-i-add-urgent-or-other-similar-phrases-to-my-quest#326590 first. I'm doing all of this in my spare time. If you urgently need help, hire someone, and don't bother me with it.

Then, to answer your questions:

1. 127.0.0.1
2. 3000
3. i guess playtests/view/2b3a35bc-2204-41c7-8347-3ab98df4cecc
4. i don't know, i'm not a Socket.io expert.
5. when you run 10 JMeter threads, it will be like 10 users are posting a chat message

Socket.io is using websockets, but it is not the same as websockets. Socket.io puts their own protocol on top of websockets, and your test messages should adhere to that protocol. I can't help you with that, because i'm not a socket.io expert. However, i once created a sample test plan for a standard socket.io example that might help you; see the comments in https://bitbucket.org/pjtr/jmeter-websocket-samplers/issues/32/problem-with-writing-text-message-to-a. As explained there, the best way to find out what your test should send is starting a normal client and use WireShark to inspect the messages the client is sending to the server.

Hth.

[Vivek Mehta]

Hi Peter,

Thank you so much for helping me out. I really appreciate it.

Thanks.

[Peter Doornbosch]

👍