Currently users have no way to reliably test their connection before
joining a room. We then want to create a connection test page
to adress this issue.
The testing will require a dedicated LiveKit token without going
through the room API, which is tied to registered meetings, lobby rules,
and longer-lived access tokens.
We introduce a new API endpoint GET /api/v1.0/connection-test/
to issue a dedicated token for diagnostics, even for anonymous users.
Each request creates a new room so users never share
the same LiveKit room during tests. Tokens are short-lived
(default 10 minutes) to limit reuse,
and the endpoint is throttled to prevent abuse.
Throttle the request-entry endpoint for authenticated users also
to guard against accidental hammering from buggy clients.
Authenticated users are throttled via RequestEntryUserRateThrottle.
Anonymous users are throttled using the lobby participant cookie
through RequestEntryAnonRateThrottle.
use the lobby participant cookie ID as the throttle cache key
rather than the client IP address.
This avoids penalising multiple users behind the same NAT or proxy
and aligns throttling with how LobbyService identifies participants.
This bug was spotted in production where users from ministries behind
NAT was blocked by throttling while using visio.
If no cookie is present yet, skip throttling for the request. The
cookie will be set on the first response and throttling will apply
from subsequent requests.
This throttle is intended to protect against accidental hammering
from buggy clients, not as a security control against DoS attacks.
This is not a security measure, we should use a WAF.
Use a mixin, introduced by @lunika in the shared
backend library to monitor throttling behavior.
The mixin tracks when throttling limits are reached, sending errors to Sentry
to trigger alerts when configured. This helps detect misconfigurations,
fine-tune throttling settings, and identify suspicious operations.
This enables safely increasing API throttling limits while ensuring stability,
providing confidence that higher limits won’t break the system.
Extract throttling classes into a dedicated Python module, following the
structure of suitenumerique/docs.
This is a preparatory refactor to ease upcoming changes to the throttling
implementation. No functional behavior change is introduced in this commit.
Arnaud Robin