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's copy is from 1 September and it asks: has anything changed since then? The resource was last modified on 1 August, so at L17 the answer is false, and the reply is 304 Not Modified.
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.