The diagram
Every HTTP response is a decision.
Send a request from the rail, or call this page's live URL with curl, and watch the flowchart decide the status one question at a time.
WebMacha sandbox
The client already holds version "v1" and says so with If-None-Match. At K13 the resource's current entity-tag matches, and because this is a GET, J18 answers 304: keep using your copy, there is nothing new to send.
Decision flow
Decision path
Send a request to see its path through the machine.
Request log
No requests yet. Simulated and live requests appear here; select one to replay it.