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Courses03 / REALTIME SYSTEMS

WebSocket Fieldwork

Test connection identity, rooms, subscriptions, event replay, and race behavior in stateful realtime systems.

Practitioner4–6 hours4 lessons4 guided labs
Begin lesson 01 ↗
COURSE SYLLABUS

Do the work in order.

  1. 01
    45 min

    Map handshake and identity state

    Connect anonymously and as a stored identity to understand which state is applied at the handshake.

  2. 02
    55 min

    Prove foreign-room access

    Apply User A and User B identities to the same room identifier and compare secure with vulnerable behavior.

  3. 03
    50 min

    Test subscriptions and event replay

    Determine whether an authenticated identity can replay an event belonging to another channel or owner.

  4. 04
    55 min

    Run bounded race testing

    Use a tiny controlled burst to reveal a check-then-update race without uncontrolled load.