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coder/coderd
Danielle Maywood 409360c62d fix(coderd): ensure inbox WebSocket is closed when client disconnects (#21652)
Relates to https://github.com/coder/coder/issues/19715

This is similar to https://github.com/coder/coder/pull/19711

This endpoint works by doing the following:
- Subscribing to the database's with pubsub
- Accepts a WebSocket upgrade
- Starts a `httpapi.Heartbeat`
- Creates a json encoder
- **Infinitely loops waiting for notification until request context
cancelled**

The critical issue here is that `httpapi.Heartbeat` silently fails when
the client has disconnected. This means we never cancel the request
context, leaving the WebSocket alive until we receive a notification
from the database and fail to write that down the pipe.

By replacing usage of `httpapi.Heartbeat` with `httpapi.HeartbeatClose`,
we cancel the context _when the heartbeat fails to write_ due to the
client disconnecting. This allows us to cleanup without waiting for a
notification to come through the pubsub channel.
2026-01-26 09:24:45 +00:00
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