xk6-websockets

This extension adds a PoC Websockets API implementation to k6.

This is meant to try to implement the specification as close as possible without doing stuff that don't make sense in k6 like:

1. not reporting errors
2. not allowing some ports and other security workarounds
3. supporting Blob as message

It likely in the future will support additional k6 specific features such as:

1. adding additional tags
2. support for ping/pong which isn't part of the specification

It is implemented using the xk6 system.

Getting started

1. Install xk6:

$ go install go.k6.io/xk6/cmd/xk6@latest

2. Build the binary:

$ xk6 build --with github.com/grafana/xk6-websockets

Discrepancies with the specifications

• binaryType is "ArrayBuffer" by default instead of "Blob" and will throw an exception if it's tried to be changed as "Blob" is not supported by k6.