Private
Public Access
Phase 7: Bot/extension system
Bot accounts (User rows with is_bot=True), scoped API tokens (read:messages, write:messages, manage:rooms) authenticated via Authorization: Bearer on both REST and the WS handshake, live bot WebSocket access on the same /ws/chat endpoint humans use, message editing (WS "edit" envelope -> message_update broadcast, fans out cross-instance for free via the existing broadcaster), incoming webhooks (room-scoped, no auth beyond the URL token), and outgoing webhooks/event subscriptions (HMAC-SHA256 signed, backgrounded delivery, creation-time SSRF validation against private/loopback/link-local targets). Token auth is additive, not a parallel system: a bearer-token-authenticated bot goes through the exact same room-membership/role checks a session- authenticated human does everywhere; only read:messages/write:messages are separately scope-gated (the two message endpoints). manage:rooms scope enforcement, full per-delivery SSRF re-validation, and bot API rate limiting were explicitly scoped out (confirmed with the repo owner) as disproportionate to this phase -- documented as known gaps in backend/README.md rather than silently skipped. Admin portal gains a Bots tab (create bots, issue/revoke scoped tokens, cross-room webhook visibility); RoomInfoPanel gains room-scoped webhook/ subscription management, mirroring how invites already work there. The chat UI also gets a minimal "edit your own message" affordance -- not asked for by the issue, but the only practical way to exercise the edit pipeline by hand instead of only via a scripted bot client. Along the way: fixed a real bug caught while writing the incoming-webhook test -- offline-push notification relied on the sender being "connected" to exclude themselves, true for WS-originated messages but not for the new webhook path, which has no WS connection for the attributed sender at all. Now explicitly excluded. Also discovered the REST-only test fixture never triggered ASGI lifespan, so app.state.broadcaster/presence didn't exist for it; moved their construction out of the lifespan into create_app() itself (Redis client construction is synchronous/lazy) so both the WS and REST-only paths always have them. New tests/test_bots.py, test_message_edit.py, test_webhooks.py (full suite now 78/78, stable across repeated runs) plus a scripted end-to-end smoke test (bot WS join/post/edit, incoming webhook, SSRF rejection, outgoing delivery) and a full browser walkthrough of the new admin/room UI. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
This commit is contained in:
Claude Sonnet 5
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import asyncio
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import uuid
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from sqlalchemy import or_, select
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from sqlalchemy.exc import IntegrityError
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from sqlalchemy.ext.asyncio import AsyncSession
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from sqlalchemy.orm import selectinload
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from app.models import EventSubscription, Message, Room, User, WebhookIncoming
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from app.security import generate_token
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from app.services.message_service import create_message
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from app.services.ssrf import validate_target_url
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from app.services.webhook_delivery import deliver_event
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VALID_EVENT_TYPES = {"message.created", "message.updated"}
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class WebhookNotFoundError(Exception):
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pass
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class InvalidEventTypeError(Exception):
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pass
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class SubscriptionNotFoundError(Exception):
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pass
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async def create_incoming_webhook(
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db: AsyncSession, actor: User, room_id: uuid.UUID, description: str | None
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) -> WebhookIncoming:
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webhook = WebhookIncoming(
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room_id=room_id, token=generate_token(), created_by=actor.id, description=description
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)
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db.add(webhook)
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try:
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await db.commit()
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except IntegrityError:
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# A token collision is astronomically unlikely (256 bits of
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# randomness) -- surface it rather than silently masking it.
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await db.rollback()
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raise
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await db.refresh(webhook)
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return webhook
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async def list_incoming_webhooks(db: AsyncSession, room_id: uuid.UUID) -> list[WebhookIncoming]:
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result = await db.execute(
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select(WebhookIncoming)
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.where(WebhookIncoming.room_id == room_id)
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.order_by(WebhookIncoming.created_at)
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)
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return list(result.scalars().all())
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async def revoke_incoming_webhook(
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db: AsyncSession, room_id: uuid.UUID, webhook_id: uuid.UUID
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) -> None:
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webhook = await db.get(WebhookIncoming, webhook_id)
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if webhook is None or webhook.room_id != room_id:
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raise WebhookNotFoundError()
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await db.delete(webhook)
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await db.commit()
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async def list_all_incoming_webhooks_admin(db: AsyncSession) -> list[WebhookIncoming]:
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result = await db.execute(
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select(WebhookIncoming)
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.options(selectinload(WebhookIncoming.room), selectinload(WebhookIncoming.creator))
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.order_by(WebhookIncoming.created_at.desc())
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)
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return list(result.scalars().all())
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async def post_via_webhook(db: AsyncSession, token: str, content: str) -> tuple[Message, Room, User]:
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result = await db.execute(
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select(WebhookIncoming)
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.where(WebhookIncoming.token == token)
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.options(selectinload(WebhookIncoming.room), selectinload(WebhookIncoming.creator))
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)
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webhook = result.scalar_one_or_none()
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if webhook is None:
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raise WebhookNotFoundError()
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message = await create_message(db, webhook.room_id, webhook.created_by, content)
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return message, webhook.room, webhook.creator
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async def create_event_subscription(
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db: AsyncSession,
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actor: User,
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room_id: uuid.UUID | None,
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event_types: list[str],
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target_url: str,
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) -> tuple[EventSubscription, str]:
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if not set(event_types) <= VALID_EVENT_TYPES:
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raise InvalidEventTypeError()
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validate_target_url(target_url)
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secret = generate_token()
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subscription = EventSubscription(
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room_id=room_id,
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event_types=event_types,
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target_url=target_url,
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signing_secret=secret,
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created_by=actor.id,
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)
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db.add(subscription)
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await db.commit()
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await db.refresh(subscription)
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return subscription, secret
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async def list_event_subscriptions(db: AsyncSession, room_id: uuid.UUID) -> list[EventSubscription]:
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result = await db.execute(
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select(EventSubscription)
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.where(EventSubscription.room_id == room_id)
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.order_by(EventSubscription.created_at)
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)
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return list(result.scalars().all())
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async def revoke_event_subscription(
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db: AsyncSession, room_id: uuid.UUID, subscription_id: uuid.UUID
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) -> None:
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subscription = await db.get(EventSubscription, subscription_id)
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if subscription is None or subscription.room_id != room_id:
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raise SubscriptionNotFoundError()
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await db.delete(subscription)
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await db.commit()
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async def list_all_event_subscriptions_admin(db: AsyncSession) -> list[EventSubscription]:
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result = await db.execute(
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select(EventSubscription)
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.options(selectinload(EventSubscription.room), selectinload(EventSubscription.creator))
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.order_by(EventSubscription.created_at.desc())
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)
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return list(result.scalars().all())
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async def dispatch_event(
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db: AsyncSession, event_type: str, room_id: uuid.UUID, payload: dict
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) -> None:
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result = await db.execute(
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select(EventSubscription).where(
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or_(EventSubscription.room_id == room_id, EventSubscription.room_id.is_(None))
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)
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)
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for subscription in result.scalars().all():
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if event_type in subscription.event_types:
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asyncio.create_task(deliver_event(subscription, event_type, payload))
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