Private
Public Access
ksmithandClaude Sonnet 5
0b995ef75f
Splits the WebSocket layer into three pieces so one app instance and many
behave identically: ConnectionManager stays a purely local socket registry;
RoomBroadcaster publishes chat messages to a per-room Redis channel and
every instance (including the publisher) forwards received messages to its
own local sockets via a single psubscribe("room:*") listener started in
main.py's lifespan; Presence is a Redis-backed refcounted hash per room
tracking who's connected across all instances.
Presence replaces the old process-local connected_user_ids check that
Phase 4's offline-push logic used -- without it, a user connected on a
different instance would look offline and get a redundant push. Fixing
this was scoped in beyond the issue's literal ask (message fan-out only)
since it's a real correctness gap in a phase specifically about running
more than one instance; a known limitation (no heartbeat/TTL, so a hard
crash leaks a presence increment) is documented in the README instead of
solved here.
New tests/test_broadcast.py spins up two independent app instances sharing
one Postgres + Redis to prove delivery and presence both actually cross
the Redis boundary, not just work in-process. Manually verified the same
thing against two real uvicorn processes on different ports.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
40 lines
772 B
TOML
40 lines
772 B
TOML
[project]
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name = "chatapp"
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version = "0.1.0"
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description = "KeepItTalking chat service backend"
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requires-python = ">=3.11"
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dependencies = [
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"fastapi>=0.115",
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"uvicorn[standard]>=0.32",
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"sqlalchemy>=2.0.36",
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"asyncpg>=0.30",
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"alembic>=1.14",
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"pydantic>=2.9",
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"pydantic[email]>=2.9",
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"pydantic-settings>=2.6",
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"argon2-cffi>=23.1",
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"itsdangerous>=2.2",
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"pywebpush>=2.0",
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"redis>=5.0",
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]
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[project.scripts]
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chatapp-create-user = "app.cli:main"
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[project.optional-dependencies]
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dev = [
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"pytest>=8",
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"pytest-asyncio>=0.24",
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"httpx>=0.27",
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]
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[build-system]
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requires = ["hatchling"]
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build-backend = "hatchling.build"
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[tool.hatch.build.targets.wheel]
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packages = ["app"]
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[tool.pytest.ini_options]
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asyncio_mode = "auto"
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