Menu
Open source
RSS
k6/ws
Note
A module with a better and standard API exists.
The new k6/experimental/websockets API partially implements the WebSockets API living standard.
When possible, we recommend using the new API. It uses a global event loop for consistency with other k6 APIs and better performance.
The k6/ws module provides a WebSocket client implementing the WebSocket protocol.
| Function | Description |
|---|---|
| connect( url, params, callback ) | Create a WebSocket connection, and provides a Socket client to interact with the service. The method blocks the test finalization until the connection is closed. |
| Class/Method | Description |
|---|---|
| Params | Used for setting various WebSocket connection parameters such as headers, cookie jar, compression, etc. |
| Socket | WebSocket client used to interact with a WS connection. |
| Socket.close() | Close the WebSocket connection. |
| Socket.on(event, callback) | Set up an event listener on the connection for any of the following events: - open - binaryMessage - message - ping - pong - close - error. |
| Socket.ping() | Send a ping. |
| Socket.send(data) | Send string data. |
| Socket.sendBinary(data) | Send binary data. |
| Socket.setInterval(callback, interval) | Call a function repeatedly at certain intervals, while the connection is open. |
| Socket.setTimeout(callback, period) | Call a function with a delay, if the connection is open. |
Was this page helpful?
Related resources from Grafana Labs
4 Dec
Performance testing and observability in Grafana Cloud
In this webinar, learn how Grafana Cloud k6 offers you the best developer experience for performance testing.
60 min
User-centered observability: load testing, real user monitoring, and synthetics
Learn how to use load testing, synthetic monitoring, and real user monitoring (RUM) to understand end users' experience of your apps. Watch on demand.