113 lines
4.5 KiB
Python
113 lines
4.5 KiB
Python
"""提供商凭据端点的依赖装配（运行时实现）。
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把 `get_session` 装配成 `SqlCredentialStore`；把网关适配器装配成探测器。
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测试经 `app.dependency_overrides` 注入内存替身——不联网。
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"""
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from __future__ import annotations
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import uuid
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from typing import Annotated
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from fastapi import Depends
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from sqlalchemy.ext.asyncio import AsyncSession
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from ww_config import get_settings
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from ww_db import get_session
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from ww_llm_gateway.adapters.base import Capabilities
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from ww_llm_gateway.adapters.openai_compat import OpenAICompatAdapter
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from ww_llm_gateway.factory import build_adapter
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from ww_shared import AppError, ErrorCode
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from ww_api.security.credentials import (
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CredentialKeyError,
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decrypt_api_key,
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)
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from ww_api.services.credentials import (
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CredentialStore,
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SqlCredentialStore,
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)
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# 已知 OpenAI 兼容提供商 → base_url（ARCH §4.2）。
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_PROVIDER_BASE_URLS: dict[str, str] = {
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"deepseek": "https://api.deepseek.com",
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"kimi": "https://api.moonshot.cn/v1",
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"qwen": "https://dashscope.aliyuncs.com/compatible-mode/v1",
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"glm": "https://open.bigmodel.cn/api/paas/v4",
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"openai": "https://api.openai.com/v1",
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# Kimi 订阅 plan（OAuth device-flow，K1.3）：coding 端点（OpenAI 兼容 + 伪造头）。
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"kimi-code": "https://api.kimi.com/coding/v1",
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# Kimi 订阅 plan（静态 Console Key，ToS 合规）：同一 coding 端点，纯 bearer 无伪造头。
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"kimi-code-key": "https://api.kimi.com/coding/v1",
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}
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def get_credential_store(
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session: Annotated[AsyncSession, Depends(get_session)],
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) -> CredentialStore:
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return SqlCredentialStore(session)
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class GatewayProviderProbe:
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"""运行时探测：解密 Key→建 OpenAI 兼容适配器→最小请求验 Key→回能力矩阵。
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依赖 store 取密文 + settings 取加密 key。绝不在日志/响应回显明文。
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"""
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def __init__(self, store: CredentialStore, enc_key: str) -> None:
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self._store = store
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self._enc_key = enc_key
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async def probe(self, owner_id: uuid.UUID, provider: str) -> Capabilities:
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cred = await self._store.get_credential(owner_id, provider)
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if cred is None:
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raise AppError(
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ErrorCode.NOT_FOUND,
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f"provider {provider} 未配置凭据",
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{"provider": provider},
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)
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base_url = _PROVIDER_BASE_URLS.get(provider)
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if base_url is None:
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raise AppError(
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ErrorCode.VALIDATION,
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f"未知提供商 {provider}",
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{"provider": provider},
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)
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if cred.api_key_enc is None:
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# api_key 探测不支持 OAuth 凭据（无 api_key 密文）——OAuth provider 走专属端点。
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raise AppError(
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ErrorCode.VALIDATION,
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f"provider {provider} 为 OAuth 凭据，不支持 api_key 连接测试",
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{"provider": provider},
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)
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try:
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api_key = decrypt_api_key(cred.api_key_enc, key=self._enc_key)
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except CredentialKeyError as exc:
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raise AppError(ErrorCode.INTERNAL, str(exc)) from exc
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# 经网关工厂构造适配器（base_url 单点归网关 build_adapter，不在此本地构造 AsyncOpenAI）。
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adapter = build_adapter(provider, api_key=api_key, base_url=base_url)
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# `_PROVIDER_BASE_URLS` 里的 api_key 型 provider 均映射到 OpenAI 兼容适配器（含
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# kimi-code-key 子类）；据此收窄类型，用公开 `probe_connection` 探测（不反手私有客户端）。
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if not isinstance(adapter, OpenAICompatAdapter):
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raise AppError(
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ErrorCode.VALIDATION,
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f"provider {provider} 不支持 api_key 连接测试",
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{"provider": provider},
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)
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try:
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# 最小探测：列模型即可验证 Key 有效（不消耗生成额度）。
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await adapter.probe_connection()
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except Exception as exc: # noqa: BLE001 — 任一失败都映射为 LLM 不可用
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raise AppError(
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ErrorCode.LLM_UNAVAILABLE,
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f"provider {provider} 连接探测失败",
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{"provider": provider},
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) from exc
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return adapter.capabilities()
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def get_provider_probe(
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store: Annotated[CredentialStore, Depends(get_credential_store)],
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) -> GatewayProviderProbe:
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return GatewayProviderProbe(store, get_settings().credential_enc_key.get_secret_value())
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