118 lines
4.2 KiB
Python
118 lines
4.2 KiB
Python
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# -*- coding: utf-8 -*-
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"""FastAPI 依赖：数据库句柄与当前登录用户（JWT + RBAC）。
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``Database`` 实例由 ``main.py`` 在启动时创建并挂在 ``app.state.db`` 上，
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路由通过 ``Depends(get_db)`` 取用；测试时可替换为临时目录实例。
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"""
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from __future__ import annotations
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from fastapi import Depends, HTTPException, Request
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from . import config
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from .jwt import decode_access_token
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from .repositories import Database
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BEARER_PREFIX = "Bearer "
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def extract_bearer_token(request: Request) -> str:
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"""从 Authorization 头提取 Bearer token，没有则返回空串。"""
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auth_header = request.headers.get("Authorization", "")
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if auth_header.startswith(BEARER_PREFIX):
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return auth_header[len(BEARER_PREFIX):].strip()
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return ""
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def get_db(request: Request) -> Database:
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return request.app.state.db
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def _resolve_identity(user: dict, identity_id: str | None, db: Database) -> dict:
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"""按令牌携带的 identity_id 装配当前身份；缺失则回退到 users.role 单角色。
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身份即权限来源：从 user_identities 取 role/sub_role/org/region，
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并据此计算 permissions 与数据范围。
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"""
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if identity_id:
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ident = db.identities.get_for_user(identity_id, user["id"])
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if ident and ident.get("status") == "active":
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user["identity_id"] = ident["id"]
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user["port"] = ident["port"]
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user["role"] = ident["role"]
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user["sub_role"] = ident.get("sub_role")
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user["org_id"] = ident.get("org_id")
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user["region_id"] = ident.get("region_id")
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user["identity_name"] = ident.get("name", "")
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# 动态装配权限与数据范围（每次从库计算，角色变更即时生效）
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user["permissions"] = db.roles.permissions_for(
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user.get("role", "opc_member"), user.get("sub_role"),
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)
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user["scope_region_ids"] = db.regions.visible_region_ids(user.get("region_id"))
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user["scope_level"] = db.regions.level(user.get("region_id"))
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return user
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def get_current_user(
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request: Request,
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db: Database = Depends(get_db),
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) -> dict:
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"""校验调用方 JWT，返回当前用户记录（含 role/权限/数据范围）。
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无效/过期/已吊销/禁用用户一律 401。令牌若绑定 identity_id 则按该身份
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解析；否则回退到 users.role 单角色（兼容旧令牌）。
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"""
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token = extract_bearer_token(request)
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if not token:
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raise HTTPException(status_code=401, detail="No token provided")
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payload = decode_access_token(token)
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if payload is None:
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raise HTTPException(status_code=401, detail="Invalid or expired token")
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user_id = payload.get("sub")
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if not db.tokens.session_valid(
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payload.get("jti", ""),
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user_id,
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payload.get("ver", 0),
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):
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raise HTTPException(status_code=401, detail="Invalid or expired token")
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user = db.users.get_by_id(user_id)
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if user is None or user.get("status") != "active":
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raise HTTPException(status_code=401, detail="Invalid or expired token")
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return _resolve_identity(user, payload.get("identity_id"), db)
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def optional_current_user(
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request: Request,
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db: Database = Depends(get_db),
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) -> dict | None:
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"""可选登录：有有效 JWT 则返回用户，否则返回 None（不报错）。"""
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token = extract_bearer_token(request)
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if not token:
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return None
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payload = decode_access_token(token)
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if payload is None:
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return None
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if not db.tokens.session_valid(
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payload.get("jti", ""), payload.get("sub", ""), payload.get("ver", 0),
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):
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return None
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user = db.users.get_by_id(payload.get("sub"))
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if user is None or user.get("status") != "active":
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return None
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return _resolve_identity(user, payload.get("identity_id"), db)
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def require_port(user: dict = Depends(get_current_user)) -> dict:
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"""按端口隔离的资源（如智能体）：必须已解析出端口身份，否则 403。
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多身份账号在 select-identity 前持有"中性令牌"（无 identity_id，
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port 未解析），此类请求不允许访问按端口隔离的资源。
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"""
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if not user.get("port"):
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raise HTTPException(status_code=403, detail="请先选择身份/端口")
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return user
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