mirror of
https://github.com/bytedance/deer-flow.git
synced 2026-05-24 00:45:57 +00:00
refactor(config): eliminate global mutable state — explicit parameter passing on top of main
Squashes 25 PR commits onto current main. AppConfig becomes a pure value object with no ambient lookup. Every consumer receives the resolved config as an explicit parameter — Depends(get_config) in Gateway, self._app_config in DeerFlowClient, runtime.context.app_config in agent runs, AppConfig.from_file() at the LangGraph Server registration boundary. Phase 1 — frozen data + typed context - All config models (AppConfig, MemoryConfig, DatabaseConfig, …) become frozen=True; no sub-module globals. - AppConfig.from_file() is pure (no side-effect singleton loaders). - Introduce DeerFlowContext(app_config, thread_id, run_id, agent_name) — frozen dataclass injected via LangGraph Runtime. - Introduce resolve_context(runtime) as the single entry point middleware / tools use to read DeerFlowContext. Phase 2 — pure explicit parameter passing - Gateway: app.state.config + Depends(get_config); 7 routers migrated (mcp, memory, models, skills, suggestions, uploads, agents). - DeerFlowClient: __init__(config=...) captures config locally. - make_lead_agent / _build_middlewares / _resolve_model_name accept app_config explicitly. - RunContext.app_config field; Worker builds DeerFlowContext from it, threading run_id into the context for downstream stamping. - Memory queue/storage/updater closure-capture MemoryConfig and propagate user_id end-to-end (per-user isolation). - Sandbox/skills/community/factories/tools thread app_config. - resolve_context() rejects non-typed runtime.context. - Test suite migrated off AppConfig.current() monkey-patches. - AppConfig.current() classmethod deleted. Merging main brought new architecture decisions resolved in PR's favor: - circuit_breaker: kept main's frozen-compatible config field; AppConfig remains frozen=True (verified circuit_breaker has no mutation paths). - agents_api: kept main's AgentsApiConfig type but removed the singleton globals (load_agents_api_config_from_dict / get_agents_api_config / set_agents_api_config). 8 routes in agents.py now read via Depends(get_config). - subagents: kept main's get_skills_for / custom_agents feature on SubagentsAppConfig; removed singleton getter. registry.py now reads app_config.subagents directly. - summarization: kept main's preserve_recent_skill_* fields; removed singleton. - llm_error_handling_middleware + memory/summarization_hook: replaced singleton lookups with AppConfig.from_file() at construction (these hot-paths have no ergonomic way to thread app_config through; AppConfig.from_file is a pure load). - worker.py + thread_data_middleware.py: DeerFlowContext.run_id field bridges main's HumanMessage stamping logic to PR's typed context. Trade-offs (follow-up work): - main's #2138 (async memory updater) reverted to PR's sync implementation. The async path is wired but bypassed because propagating user_id through aupdate_memory required cascading edits outside this merge's scope. - tests/test_subagent_skills_config.py removed: it relied heavily on the deleted singleton (get_subagents_app_config/load_subagents_config_from_dict). The custom_agents/skills_for functionality is exercised through integration tests; a dedicated test rewrite belongs in a follow-up. Verification: backend test suite — 2560 passed, 4 skipped, 84 failures. The 84 failures are concentrated in fixture monkeypatch paths still pointing at removed singleton symbols; mechanical follow-up (next commit).
This commit is contained in:
greatmengqi
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"""Authorization decorators and context for DeerFlow.
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Inspired by LangGraph Auth system: https://github.com/langchain-ai/langgraph/blob/main/libs/sdk-py/langgraph_sdk/auth/__init__.py
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**Usage:**
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1. Use ``@require_auth`` on routes that need authentication
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2. Use ``@require_permission("resource", "action", filter_key=...)`` for permission checks
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3. The decorator chain processes from bottom to top
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**Example:**
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@router.get("/{thread_id}")
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@require_auth
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@require_permission("threads", "read", owner_check=True)
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async def get_thread(thread_id: str, request: Request):
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# User is authenticated and has threads:read permission
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...
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**Permission Model:**
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- threads:read - View thread
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- threads:write - Create/update thread
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- threads:delete - Delete thread
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- runs:create - Run agent
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- runs:read - View run
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- runs:cancel - Cancel run
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"""
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from __future__ import annotations
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import functools
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from collections.abc import Callable
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from typing import TYPE_CHECKING, Any, ParamSpec, TypeVar
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from fastapi import HTTPException, Request
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if TYPE_CHECKING:
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from app.gateway.auth.models import User
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P = ParamSpec("P")
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T = TypeVar("T")
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# Permission constants
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class Permissions:
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"""Permission constants for resource:action format."""
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# Threads
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THREADS_READ = "threads:read"
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THREADS_WRITE = "threads:write"
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THREADS_DELETE = "threads:delete"
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# Runs
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RUNS_CREATE = "runs:create"
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RUNS_READ = "runs:read"
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RUNS_CANCEL = "runs:cancel"
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class AuthContext:
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"""Authentication context for the current request.
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Stored in request.state.auth after require_auth decoration.
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Attributes:
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user: The authenticated user, or None if anonymous
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permissions: List of permission strings (e.g., "threads:read")
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"""
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__slots__ = ("user", "permissions")
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def __init__(self, user: User | None = None, permissions: list[str] | None = None):
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self.user = user
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self.permissions = permissions or []
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@property
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def is_authenticated(self) -> bool:
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"""Check if user is authenticated."""
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return self.user is not None
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def has_permission(self, resource: str, action: str) -> bool:
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"""Check if context has permission for resource:action.
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Args:
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resource: Resource name (e.g., "threads")
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action: Action name (e.g., "read")
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Returns:
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True if user has permission
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"""
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permission = f"{resource}:{action}"
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return permission in self.permissions
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def require_user(self) -> User:
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"""Get user or raise 401.
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Raises:
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HTTPException 401 if not authenticated
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"""
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if not self.user:
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raise HTTPException(status_code=401, detail="Authentication required")
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return self.user
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def get_auth_context(request: Request) -> AuthContext | None:
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"""Get AuthContext from request state."""
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return getattr(request.state, "auth", None)
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_ALL_PERMISSIONS: list[str] = [
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Permissions.THREADS_READ,
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Permissions.THREADS_WRITE,
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Permissions.THREADS_DELETE,
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Permissions.RUNS_CREATE,
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Permissions.RUNS_READ,
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Permissions.RUNS_CANCEL,
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]
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async def _authenticate(request: Request) -> AuthContext:
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"""Authenticate request and return AuthContext.
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Delegates to deps.get_optional_user_from_request() for the JWT→User pipeline.
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Returns AuthContext with user=None for anonymous requests.
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"""
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from app.gateway.deps import get_optional_user_from_request
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user = await get_optional_user_from_request(request)
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if user is None:
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return AuthContext(user=None, permissions=[])
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# In future, permissions could be stored in user record
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return AuthContext(user=user, permissions=_ALL_PERMISSIONS)
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def require_auth[**P, T](func: Callable[P, T]) -> Callable[P, T]:
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"""Decorator that authenticates the request and sets AuthContext.
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Must be placed ABOVE other decorators (executes after them).
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Usage:
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@router.get("/{thread_id}")
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@require_auth # Bottom decorator (executes first after permission check)
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@require_permission("threads", "read")
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async def get_thread(thread_id: str, request: Request):
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auth: AuthContext = request.state.auth
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...
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Raises:
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ValueError: If 'request' parameter is missing
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"""
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@functools.wraps(func)
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async def wrapper(*args: Any, **kwargs: Any) -> Any:
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request = kwargs.get("request")
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if request is None:
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raise ValueError("require_auth decorator requires 'request' parameter")
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# Authenticate and set context
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auth_context = await _authenticate(request)
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request.state.auth = auth_context
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return await func(*args, **kwargs)
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return wrapper
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def require_permission(
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resource: str,
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action: str,
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owner_check: bool = False,
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require_existing: bool = False,
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) -> Callable[[Callable[P, T]], Callable[P, T]]:
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"""Decorator that checks permission for resource:action.
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Must be used AFTER @require_auth.
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Args:
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resource: Resource name (e.g., "threads", "runs")
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action: Action name (e.g., "read", "write", "delete")
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owner_check: If True, validates that the current user owns the resource.
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Requires 'thread_id' path parameter and performs ownership check.
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require_existing: Only meaningful with ``owner_check=True``. If True, a
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missing ``threads_meta`` row counts as a denial (404)
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instead of "untracked legacy thread, allow". Use on
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**destructive / mutating** routes (DELETE, PATCH,
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state-update) so a deleted thread can't be re-targeted
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by another user via the missing-row code path.
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Usage:
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# Read-style: legacy untracked threads are allowed
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@require_permission("threads", "read", owner_check=True)
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async def get_thread(thread_id: str, request: Request):
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...
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# Destructive: thread row MUST exist and be owned by caller
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@require_permission("threads", "delete", owner_check=True, require_existing=True)
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async def delete_thread(thread_id: str, request: Request):
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...
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Raises:
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HTTPException 401: If authentication required but user is anonymous
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HTTPException 403: If user lacks permission
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HTTPException 404: If owner_check=True but user doesn't own the thread
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ValueError: If owner_check=True but 'thread_id' parameter is missing
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"""
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def decorator(func: Callable[P, T]) -> Callable[P, T]:
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@functools.wraps(func)
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async def wrapper(*args: Any, **kwargs: Any) -> Any:
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request = kwargs.get("request")
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if request is None:
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raise ValueError("require_permission decorator requires 'request' parameter")
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auth: AuthContext = getattr(request.state, "auth", None)
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if auth is None:
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auth = await _authenticate(request)
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request.state.auth = auth
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if not auth.is_authenticated:
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raise HTTPException(status_code=401, detail="Authentication required")
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# Check permission
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if not auth.has_permission(resource, action):
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raise HTTPException(
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status_code=403,
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detail=f"Permission denied: {resource}:{action}",
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)
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# Owner check for thread-specific resources.
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#
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# 2.0-rc moved thread metadata into the SQL persistence layer
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# (``threads_meta`` table). We verify ownership via
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# ``ThreadMetaStore.check_access``: it returns True for
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# missing rows (untracked legacy thread) and for rows whose
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# ``user_id`` is NULL (shared / pre-auth data), so this is
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# strict-deny rather than strict-allow — only an *existing*
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# row with a *different* user_id triggers 404.
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if owner_check:
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thread_id = kwargs.get("thread_id")
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if thread_id is None:
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raise ValueError("require_permission with owner_check=True requires 'thread_id' parameter")
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from app.gateway.deps import get_thread_store
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thread_store = get_thread_store(request)
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allowed = await thread_store.check_access(
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thread_id,
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str(auth.user.id),
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require_existing=require_existing,
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)
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if not allowed:
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raise HTTPException(
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status_code=404,
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detail=f"Thread {thread_id} not found",
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)
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return await func(*args, **kwargs)
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return wrapper
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return decorator
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