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ThearchyHelios
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330 lines
16 KiB
Python
330 lines
16 KiB
Python
"""身份接口（BE-1）：/me、登录、登出、OIDC、登录方式设置、引导第一个管理员、JWKS。设计文档 §2.7、§3.10。
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登录方式三种：off（默认）/ local / oidc，环境变量 AGENTLAB_AUTH_MODE 优先于这里的设置（env_locked）。
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- 从 off（或 oidc）切到 local：库里还没有能用口令登录的管理员时，必须在同一个请求里建出第一个管理员（bootstrap），
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建好就以他的身份登录——不然切过去的那一刻谁都进不来；
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- 切到 oidc：至少配一个管理员映射（管理员组或管理员用户名），并且身份提供方的配置读得到；
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- 环境变量指定了 local、库里一个管理员都没有：POST /bootstrap 建第一个；
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- 都进不去了：服务器上执行 python -m app.auth reset-admin。
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"""
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from __future__ import annotations
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from typing import Any
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from fastapi import APIRouter, Depends, Header, HTTPException, Request, Response
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from fastapi.responses import JSONResponse, RedirectResponse
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from pydantic import BaseModel, Field
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from sqlalchemy import select
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from sqlalchemy.ext.asyncio import AsyncSession
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from app.api.deps import Principal, current_principal, decode_actor, ensure_role
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from app.auth import (
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MODES, SETTING_KEY, current_mode, env_mode, load_settings, remember_settings, stored_settings, user_can_chat,
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)
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from app.auth import oidc, sessions
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from app.auth.audit import record
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from app.auth.passwords import hash_password, password_problem, verify_password
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from app.core import crypto
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from app.core.config import settings
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from app.db.base import get_session
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from app.db.models import Setting, User
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router = APIRouter(prefix="/api/auth", tags=["auth"])
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_OIDC_FIELDS = ("issuer", "client_id", "client_secret", "scopes", "username_claim", "groups_claim",
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"admin_groups", "admin_users", "builder_groups")
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def principal_out(p: Principal) -> dict[str, Any]:
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return {"mode": p.mode, "username": p.username, "display_name": p.display_name or p.username,
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"role": p.role or "user", "groups": list(p.groups), "verified": p.verified,
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"user_can_chat": user_can_chat()}
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async def principal_full(session: AsyncSession, p: Principal) -> dict[str, Any]:
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"""认人接口、登录交回的那一份：principal_out 再加上管理员开没开「使用者可以建个人应用」（同 user_can_chat，使用者
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读不到设置，新建应用的入口、个人蓝图页按它给）。"""
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from app.blueprints.personal import enabled
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return {**principal_out(p), "user_personal_apps": await enabled(session)}
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@router.get("/me")
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async def me(x_actor: str | None = Header(default=None), session: AsyncSession = Depends(get_session)) -> Any:
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"""当前是谁。关登录：mode=off、role=admin、username 是自报的署名。开登录没登录：401，带 mode（登录页据此显示
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账号密码还是单点登录）和 can_bootstrap：账号密码登录、库里还没有能登录的管理员时为真（环境变量直接指定了 local
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的新部署），登录页据此给「建第一个管理员」——条件和 POST /bootstrap 同一个，不多说别的。"""
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principal = current_principal()
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if principal.mode == "off":
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actor = decode_actor(x_actor)
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return await principal_full(session, Principal(username=actor, display_name=actor, role="admin", mode="off"))
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if not principal.username:
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can_bootstrap = principal.mode == "local" and not await _local_admin_exists(session)
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return JSONResponse(status_code=401, content={"detail": "请先登录", "code": "auth_required",
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"mode": principal.mode, "can_bootstrap": can_bootstrap})
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return await principal_full(session, principal)
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def _client_ip(request: Request) -> str:
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return request.client.host if request.client else ""
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def _login_response(request: Request, response: Response, token: str) -> None:
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response.set_cookie(sessions.COOKIE, token, **sessions.cookie_kwargs(sessions.is_secure(request.url.scheme)))
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class LoginIn(BaseModel):
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username: str = Field(min_length=1, max_length=100)
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password: str = Field(min_length=1, max_length=200)
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@router.post("/login")
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async def login(payload: LoginIn, request: Request, response: Response,
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session: AsyncSession = Depends(get_session)) -> dict[str, Any]:
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"""账号密码登录。单点登录模式下也认有口令的本地账号（reset-admin 建的找回账号）。"""
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mode = current_mode()
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if mode == "off":
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raise HTTPException(409, "未开启登录，无需登录")
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keys = (f"u:{payload.username.strip().lower()}", f"ip:{_client_ip(request)}")
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if wait := sessions.wait_seconds(*keys):
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raise HTTPException(429, f"登录失败次数过多，请 {wait} 秒后再试")
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user = (await session.execute(select(User).where(User.username == payload.username.strip()))).scalar_one_or_none()
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if user is None or user.disabled or not verify_password(payload.password, user.password_hash):
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sessions.failed(*keys)
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raise HTTPException(401, "用户名或密码不正确")
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sessions.succeeded(*keys)
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token = await sessions.create_session(session, user, ip=_client_ip(request),
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user_agent=request.headers.get("user-agent"))
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await session.commit()
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_login_response(request, response, token)
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return await principal_full(session, await sessions.principal_of(session, user, mode))
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@router.post("/logout", status_code=204)
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async def logout(request: Request, session: AsyncSession = Depends(get_session)) -> Response:
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await sessions.revoke(session, request.cookies.get(sessions.COOKIE))
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await session.commit()
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out = Response(status_code=204)
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out.delete_cookie(sessions.COOKIE, path="/")
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return out
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# ---------------------------------------------------------------- OIDC
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def _redirect_uri(request: Request) -> str:
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base = settings.public_url.rstrip("/") or str(request.base_url).rstrip("/")
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return f"{base}/api/auth/oidc/callback"
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def _oidc_config() -> dict[str, Any]:
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config = dict(stored_settings().get("oidc") or {})
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if not config.get("issuer") or not config.get("client_id"):
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raise HTTPException(409, "单点登录尚未配置，请联系管理员")
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return config
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@router.get("/oidc/start")
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async def oidc_start(request: Request, next: str | None = None) -> Response: # noqa: A002 - 查询参数就叫 next
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if current_mode() != "oidc":
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raise HTTPException(409, "未开启单点登录")
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try:
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url, cookie = await oidc.start(_oidc_config(), _redirect_uri(request), next)
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except oidc.OidcError as e:
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raise HTTPException(502, str(e)) from e
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out = RedirectResponse(url, status_code=302)
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out.set_cookie(oidc.STATE_COOKIE, cookie, max_age=oidc.STATE_TTL_S, httponly=True, samesite="lax",
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secure=sessions.is_secure(request.url.scheme), path=oidc.STATE_PATH)
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return out
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@router.get("/oidc/callback")
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async def oidc_callback(request: Request, code: str | None = None, state: str | None = None,
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error: str | None = None, session: AsyncSession = Depends(get_session)) -> Response:
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"""身份提供方跳回来。state cookie 当场作废：同一次授权回放第二次时 cookie 已经没了。出错跳回登录页并带上原因。"""
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from urllib.parse import quote
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cookie = request.cookies.get(oidc.STATE_COOKIE)
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def back(target: str) -> RedirectResponse:
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out = RedirectResponse(target, status_code=302)
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out.delete_cookie(oidc.STATE_COOKIE, path=oidc.STATE_PATH)
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return out
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try:
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if current_mode() != "oidc":
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raise oidc.OidcError("未开启单点登录")
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if error:
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raise oidc.OidcError(f"身份提供方未完成登录：{error}")
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data = oidc.read_state(cookie, state)
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if not code:
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raise oidc.OidcError("身份提供方没有给出授权码")
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config = _oidc_config()
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claims = await oidc.exchange(config, code, _redirect_uri(request), data["verifier"], data["nonce"])
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user = await oidc.upsert_user(session, claims, config)
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token = await sessions.create_session(session, user, ip=_client_ip(request),
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user_agent=request.headers.get("user-agent"))
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await session.commit()
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except (oidc.OidcError, HTTPException) as e:
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await session.rollback()
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reason = e.detail if isinstance(e, HTTPException) else str(e)
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return back(f"/login?error={quote(str(reason))}")
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out = back(oidc.safe_next(data.get("next")))
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_login_response(request, out, token)
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return out
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@router.get("/jwks")
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async def jwks() -> dict[str, Any]:
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"""service_on_behalf 身份断言的公钥（EdDSA）。外部系统据此核验 X-AgentLab-Assertion。"""
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from app.auth.signing import jwks as keys
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return keys()
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# ---------------------------------------------------------------- 设置与引导
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def _settings_out(value: dict[str, Any]) -> dict[str, Any]:
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config = {k: v for k, v in (value.get("oidc") or {}).items() if k in _OIDC_FIELDS}
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if config.get("client_secret"):
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config["client_secret"] = crypto.mask(config["client_secret"])
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return {"mode": current_mode(), "env_locked": env_mode() is not None, "oidc": config,
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"user_can_chat": bool(value.get("user_can_chat"))}
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def _require_admin() -> None:
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"""改登录设置：关登录时谁都能改（所有人等同管理员）；开了登录只给管理员。"""
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if current_principal().mode != "off":
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ensure_role("admin")
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@router.get("/settings")
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async def get_settings() -> dict[str, Any]:
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_require_admin()
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return _settings_out(await load_settings())
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class BootstrapIn(BaseModel):
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username: str = Field(min_length=1, max_length=100, pattern=r"^[^\s/]+$")
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password: str = Field(min_length=1, max_length=200)
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display_name: str | None = Field(default=None, max_length=100)
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class SettingsIn(BaseModel):
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mode: str | None = None
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oidc: dict[str, Any] | None = None
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user_can_chat: bool | None = None
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bootstrap: BootstrapIn | None = None
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async def _local_admin_exists(session: AsyncSession) -> bool:
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return (await session.execute(select(User.id).where(
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User.role == "admin", User.disabled.is_(False), User.password_hash.is_not(None)).limit(1))).first() is not None
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async def _create_admin(session: AsyncSession, payload: BootstrapIn) -> User:
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if problem := password_problem(payload.password):
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raise HTTPException(422, problem)
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if (await session.execute(select(User.id).where(User.username == payload.username))).first():
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raise HTTPException(409, f"用户名「{payload.username}」已存在，请换一个，或用它的密码登录")
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user = User(username=payload.username, display_name=payload.display_name or payload.username, role="admin",
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password_hash=hash_password(payload.password), created_by=current_principal().username)
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session.add(user)
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await session.flush()
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await record(session, "user.create", "user", user.id, data={"username": user.username, "role": "admin",
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"bootstrap": True})
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return user
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def _merge_oidc(given: dict[str, Any] | None, before: dict[str, Any]) -> dict[str, Any]:
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merged = dict(before)
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for key, value in (given or {}).items():
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if key not in _OIDC_FIELDS:
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continue
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if key == "client_secret":
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# 提交掩码值表示保持原值
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if value and before.get(key) and value == crypto.mask(before[key]):
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continue
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value = crypto.encrypt(str(value)) if value else None
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elif key in ("admin_groups", "admin_users", "builder_groups"):
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value = [str(v).strip() for v in (value or []) if str(v).strip()]
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elif isinstance(value, str):
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value = value.strip()
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merged[key] = value
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return merged
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@router.put("/settings")
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async def put_settings(payload: SettingsIn, request: Request, response: Response,
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session: AsyncSession = Depends(get_session)) -> dict[str, Any]:
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_require_admin()
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before = await load_settings(force=True)
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value = dict(before)
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target = payload.mode or before.get("mode") or "off"
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if target not in MODES:
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raise HTTPException(422, "登录方式只能是未开启、账号密码登录、单点登录之一")
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if payload.mode and env_mode() is not None and payload.mode != env_mode():
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raise HTTPException(409, "登录方式由服务端的环境变量指定，不能在这里修改")
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if payload.oidc is not None:
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value["oidc"] = _merge_oidc(payload.oidc, dict(before.get("oidc") or {}))
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if payload.user_can_chat is not None:
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value["user_can_chat"] = payload.user_can_chat
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value["mode"] = target
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created: User | None = None
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effective = env_mode() or target
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if effective == "local" and current_mode() != "local":
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if payload.bootstrap is not None:
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created = await _create_admin(session, payload.bootstrap)
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elif not await _local_admin_exists(session):
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raise HTTPException(422, "开启账号密码登录前，需要同时创建第一个管理员账号")
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if effective == "oidc":
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config = value.get("oidc") or {}
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if not config.get("issuer") or not config.get("client_id"):
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raise HTTPException(422, "单点登录需要填写身份提供方地址和客户端标识")
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if not (config.get("admin_groups") or config.get("admin_users")):
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raise HTTPException(422, "单点登录至少需要配置一个管理员映射（管理员组或管理员用户名），否则无人能管理系统")
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if current_mode() != "oidc" or payload.oidc is not None:
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try:
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await oidc.discover(config["issuer"])
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except oidc.OidcError as e:
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raise HTTPException(422, str(e)) from e
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row = await session.get(Setting, SETTING_KEY)
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if row is None:
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session.add(Setting(key=SETTING_KEY, value=value))
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else:
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row.value = value
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changed = {k: value.get(k) for k in ("mode", "user_can_chat") if value.get(k) != before.get(k)}
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if payload.oidc is not None:
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changed["oidc"] = {k: v for k, v in (value.get("oidc") or {}).items() if k != "client_secret"}
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await record(session, "auth.settings", "auth", SETTING_KEY, data=changed)
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token = None
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if created is not None:
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token = await sessions.create_session(session, created, ip=_client_ip(request),
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user_agent=request.headers.get("user-agent"))
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await session.commit()
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remember_settings(value)
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out = _settings_out(value)
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if token is not None and created is not None:
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_login_response(request, response, token)
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out["principal"] = await principal_full(session, await sessions.principal_of(session, created, current_mode()))
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return out
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@router.post("/bootstrap")
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async def bootstrap(payload: BootstrapIn, request: Request, response: Response,
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session: AsyncSession = Depends(get_session)) -> dict[str, Any]:
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"""建第一个管理员并登录。只在账号密码登录模式下、库里还没有能登录的管理员时可用（环境变量直接指定了 local 的新部署）。"""
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if current_mode() != "local":
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raise HTTPException(409, "只有在账号密码登录模式下才能创建第一个管理员")
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if await _local_admin_exists(session):
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raise HTTPException(409, "已经有管理员了，请用管理员账号登录")
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user = await _create_admin(session, payload)
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token = await sessions.create_session(session, user, ip=_client_ip(request),
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user_agent=request.headers.get("user-agent"))
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await session.commit()
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_login_response(request, response, token)
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return await principal_full(session, await sessions.principal_of(session, user, "local"))
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