anti
172a002d41
- Add `get_repository()` factory function to select DB implementation at runtime via DECNET_DB_TYPE env var - Extract BaseRepository abstract interface from SQLiteRepository - Update dependencies to use factory-based repository injection - Add DECNET_DB_TYPE env var support (defaults to sqlite) - Refactor models and repository base class for cross-dialect compatibility
140 lines
4.9 KiB
Python
140 lines
4.9 KiB
Python
from typing import Any, Optional
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import jwt
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from fastapi import Depends, HTTPException, status, Request
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from fastapi.security import OAuth2PasswordBearer
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from decnet.web.auth import ALGORITHM, SECRET_KEY
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from decnet.web.db.repository import BaseRepository
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from decnet.web.db.factory import get_repository
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# Shared repository singleton
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_repo: Optional[BaseRepository] = None
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def get_repo() -> BaseRepository:
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"""FastAPI dependency to inject the configured repository."""
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global _repo
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if _repo is None:
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_repo = get_repository()
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return _repo
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repo = get_repo()
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oauth2_scheme = OAuth2PasswordBearer(tokenUrl="/api/v1/auth/login")
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async def get_stream_user(request: Request, token: Optional[str] = None) -> str:
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"""Auth dependency for SSE endpoints — accepts Bearer header OR ?token= query param.
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EventSource does not support custom headers, so the query-string fallback is intentional here only.
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"""
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_credentials_exception = HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
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detail="Could not validate credentials",
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headers={"WWW-Authenticate": "Bearer"},
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)
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auth_header = request.headers.get("Authorization")
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resolved: str | None = (
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auth_header.split(" ", 1)[1]
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if auth_header and auth_header.startswith("Bearer ")
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else token
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)
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if not resolved:
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raise _credentials_exception
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try:
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_payload: dict[str, Any] = jwt.decode(resolved, SECRET_KEY, algorithms=[ALGORITHM])
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_user_uuid: Optional[str] = _payload.get("uuid")
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if _user_uuid is None:
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raise _credentials_exception
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return _user_uuid
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except jwt.PyJWTError:
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raise _credentials_exception
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async def _decode_token(request: Request) -> str:
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"""Decode and validate a Bearer JWT, returning the user UUID."""
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_credentials_exception = HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
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detail="Could not validate credentials",
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headers={"WWW-Authenticate": "Bearer"},
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)
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auth_header = request.headers.get("Authorization")
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token: str | None = (
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auth_header.split(" ", 1)[1]
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if auth_header and auth_header.startswith("Bearer ")
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else None
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)
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if not token:
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raise _credentials_exception
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try:
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_payload: dict[str, Any] = jwt.decode(token, SECRET_KEY, algorithms=[ALGORITHM])
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_user_uuid: Optional[str] = _payload.get("uuid")
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if _user_uuid is None:
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raise _credentials_exception
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return _user_uuid
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except jwt.PyJWTError:
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raise _credentials_exception
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async def get_current_user(request: Request) -> str:
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"""Auth dependency — enforces must_change_password."""
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_user_uuid = await _decode_token(request)
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_user = await repo.get_user_by_uuid(_user_uuid)
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if _user and _user.get("must_change_password"):
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raise HTTPException(
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status_code=status.HTTP_403_FORBIDDEN,
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detail="Password change required before accessing this resource",
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)
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return _user_uuid
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async def get_current_user_unchecked(request: Request) -> str:
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"""Auth dependency — skips must_change_password enforcement.
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Use only for endpoints that must remain reachable with the flag set (e.g. change-password).
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"""
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return await _decode_token(request)
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# ---------------------------------------------------------------------------
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# Role-based access control
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# ---------------------------------------------------------------------------
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def require_role(*allowed_roles: str):
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"""Factory that returns a FastAPI dependency enforcing role membership.
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The returned dependency chains from ``get_current_user`` (JWT + must_change_password)
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then verifies the user's role is in *allowed_roles*. Returns the full user dict so
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endpoints can inspect ``user["uuid"]``, ``user["role"]``, etc. without a second lookup.
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"""
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async def _check(current_user: str = Depends(get_current_user)) -> dict:
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user = await repo.get_user_by_uuid(current_user)
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if not user or user["role"] not in allowed_roles:
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raise HTTPException(
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status_code=status.HTTP_403_FORBIDDEN,
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detail="Insufficient permissions",
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)
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return user
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return _check
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def require_stream_role(*allowed_roles: str):
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"""Like ``require_role`` but for SSE endpoints that accept a query-param token."""
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async def _check(request: Request, token: Optional[str] = None) -> dict:
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user_uuid = await get_stream_user(request, token)
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user = await repo.get_user_by_uuid(user_uuid)
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if not user or user["role"] not in allowed_roles:
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raise HTTPException(
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status_code=status.HTTP_403_FORBIDDEN,
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detail="Insufficient permissions",
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)
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return user
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return _check
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require_admin = require_role("admin")
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require_viewer = require_role("viewer", "admin")
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require_stream_viewer = require_stream_role("viewer", "admin")
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