Here is another WebSocket plugin for JMeter. It supports the RFC6455 (v13) of the WebSocket protocol.
Link: https://github.com/maciejzaleski/JMeter
Features:
- Supports HTTS/HTTPS (ws/wss) version of the WebSocket protocol
- Option to ignore SSL certificate errors
- Streaming allows for a single connection to remain open for the duration of the test
- Response has to match predefined regular expression
- Response timeout
- Response message backlog (build the Sampler response from multiple server messages)
- Connection could be closed if server sends a message matching predefined regular expression
