"""Dynamics365 discover / preview_tools / create_tools handler 实现。 handler 签名遵循 ``OperationHandler`` 协议： ``(source_type: str, system_config: dict[str, Any]) -> Awaitable[Any]``。 handler 内部职责： 1. 从 ``system_config`` 提取 ``base_url`` / ``auth_config`` / ``_resolved_token`` 等 2. 构建 ``auth_headers``（token 由 use_cases 层注入到 ``system_config["_resolved_token"]``） 3. 构造带 429 退避的 ``request_fn``，注入到生成器 payload 4. 调用 ``discover_dataverse_metadata`` 或 ``Dynamics365ConfigGenerator`` product_line 分派（首期仅 dataverse）： - ``dataverse``：走 ``_discover_dataverse`` 路径 - ``finance_operations``：P1 延后，抛 ``NotImplementedError`` 429 退避分层（见设计文档 §6.7）： - discover/preview/create 阶段：本模块 ``_request_with_retry`` 实现（解析 Retry-After） - 运行时工具执行：通过工具 ``retry_policy.retry_status_codes: [429]`` 配置（见 generators.py） """ from __future__ import annotations import asyncio from collections.abc import Awaitable, Callable from typing import TYPE_CHECKING, Any from yuxi.external_systems.exceptions import ( AuthError, DomainValidationError, ExecutionError, FrameworkError, RateLimitExceededError, ) from yuxi.external_systems.integrations.dynamics365.error_extractor import ( map_dataverse_error, ) from yuxi.external_systems.integrations.dynamics365.generators import ( Dynamics365ConfigGenerator, ) from yuxi.external_systems.integrations.dynamics365.odata_metadata import ( discover_dataverse_metadata, ) from yuxi.external_systems.integrations.schemas import GeneratedToolsDraft if TYPE_CHECKING: import httpx # discover/preview/create 阶段 429 退避参数 _RETRY_MAX_ATTEMPTS = 5 _RETRY_BASE_DELAY = 1.0 # Dataverse 通用请求头（除 Authorization 外） _DATAVERSE_HEADERS: dict[str, str] = { "OData-Version": "4.0", "OData-MaxVersion": "4.0", "Accept": "application/json", } def _build_auth_headers(system_config: dict[str, Any]) -> dict[str, str]: """从 system_config 提取 token，构建 Dataverse 请求头。 system_config 中 token 由 use_cases 层通过 ``token_manager.get_token`` 预处理后 注入到 ``system_config["_resolved_token"]["access_token"]``。handler 不自行换取 token——token 获取是 use_cases 层的职责。 """ token_info = system_config.get("_resolved_token") if not isinstance(token_info, dict) or not token_info.get("access_token"): raise AuthError("dynamics365: system_config 缺少 _resolved_token，use_cases 层未注入 token") access_token = token_info["access_token"] headers = dict(_DATAVERSE_HEADERS) headers["Authorization"] = f"Bearer {access_token}" headers["Content-Type"] = "application/json; charset=utf-8" return headers def _resolve_base_url(system_config: dict[str, Any]) -> str: """从 system_config 提取 base_url。""" connection_config = system_config.get("connection_config") or {} base_url = connection_config.get("base_url") if not base_url: raise DomainValidationError("dynamics365: system_config.connection_config.base_url 不能为空") return str(base_url) def _resolve_product_line(system_config: dict[str, Any]) -> str: """从 system_config 提取 product_line，默认 dataverse。""" connection_config = system_config.get("connection_config") or {} return str(connection_config.get("product_line", "dataverse")) def _resolve_entity_filter(system_config: dict[str, Any]) -> list[str] | None: """从 system_config 提取 entity_filter 白名单。""" discovery_options = system_config.get("discovery_options") or {} return discovery_options.get("entity_filter") async def _request_with_retry( method: str, url: str, headers: dict[str, str], *, max_retries: int = _RETRY_MAX_ATTEMPTS, base_delay: float = _RETRY_BASE_DELAY, ) -> httpx.Response: """handler 内部 HTTP 调用的 429 退避（仅用于 discover/preview/create 阶段）。 优先使用响应头 ``Retry-After``，否则指数退避（``base_delay * 2 ** attempt``）。 运行时工具执行的 429 退避由框架 executor + 工具 retry_policy 处理， 不在此函数范围内。 非 2xx 响应（非 429）通过 ``map_dataverse_error`` 转换为 ExternalSystemError 子类。 网络层异常（超时 / 连接错误）转换为 ``ExecutionError``（遵循设计文档 §8.5）。 """ import httpx try: async with httpx.AsyncClient() as client: last_response: httpx.Response | None = None for attempt in range(max_retries + 1): response = await client.request(method, url, headers=headers) if response.status_code != 429: last_response = response break if attempt == max_retries: retry_after_header = response.headers.get("Retry-After", "60") try: retry_after = int(retry_after_header) except ValueError: retry_after = 60 raise RateLimitExceededError( f"Dataverse 限流，已重试 {max_retries} 次仍失败: {url}", retry_after=retry_after, limit_type="qps", ) # 优先使用 Retry-After 头，否则指数退避 retry_after_header = response.headers.get("Retry-After") if retry_after_header: try: delay = float(retry_after_header) except ValueError: delay = base_delay * (2**attempt) else: delay = base_delay * (2**attempt) await asyncio.sleep(delay) except httpx.RequestError as exc: raise ExecutionError(f"Dataverse 网络请求失败: {exc}") from exc assert last_response is not None if last_response.is_success: return last_response # 非 2xx：解析错误 body 并映射为 ExternalSystemError 子类 try: error_body = last_response.json() except Exception: error_body = {"error": {"message": last_response.text}} raise map_dataverse_error(last_response.status_code, error_body) def _make_request_fn() -> Callable[[str, str, dict[str, str]], Awaitable[httpx.Response]]: """构造带 429 退避的 request_fn，供 discover_dataverse_metadata 使用。""" async def request_fn(method: str, url: str, headers: dict[str, str]) -> httpx.Response: return await _request_with_retry(method, url, headers) return request_fn async def discover_dynamics365( source_type: str, system_config: dict[str, Any], ) -> list[dict[str, Any]]: """discover handler：发现 Dataverse 实体元数据摘要。 Returns: 实体摘要列表，每项含 ``logical_name`` / ``display_name`` / ``entity_set_name`` / ``primary_id_attribute``。 """ _ensure_dataverse_product_line(system_config) base_url = _resolve_base_url(system_config) auth_headers = _build_auth_headers(system_config) entity_filter = _resolve_entity_filter(system_config) request_fn = _make_request_fn() metadata = await discover_dataverse_metadata( base_url, auth_headers, entity_filter=entity_filter, request_fn=request_fn, ) return [ { "logical_name": e.logical_name, "schema_name": e.schema_name, "display_name": e.display_name, "entity_set_name": e.entity_set_name, "primary_id_attribute": e.primary_id_attribute, "attribute_count": len(e.attributes), "navigation_property_count": len(e.navigation_properties), } for e in metadata ] async def preview_dynamics365_tools( source_type: str, system_config: dict[str, Any], ) -> list[dict[str, Any]]: """preview_tools handler：预览将生成的工具列表。 Returns: 工具预览列表，每项为 ExternalToolCreateInput 兼容的 dict。 """ _ensure_dataverse_product_line(system_config) payload = _build_generator_payload(system_config) generator = Dynamics365ConfigGenerator() return await generator.generate(payload) async def create_dynamics365_tools( source_type: str, system_config: dict[str, Any], ) -> GeneratedToolsDraft: """create_tools handler：生成工具草稿（不直接持久化）。 Returns: GeneratedToolsDraft，由 use_cases 层统一持久化。 """ _ensure_dataverse_product_line(system_config) payload = _build_generator_payload(system_config) generator = Dynamics365ConfigGenerator() tool_configs = await generator.generate(payload) return GeneratedToolsDraft(tool_configs=tool_configs, override_existing=False) def _ensure_dataverse_product_line(system_config: dict[str, Any]) -> None: """校验 product_line，首期仅支持 dataverse。""" product_line = _resolve_product_line(system_config) if product_line == "dataverse": return if product_line == "finance_operations": raise FrameworkError("F&O 产品线将在 P1 实现") raise DomainValidationError(f"未知的 product_line: {product_line}") def _build_generator_payload(system_config: dict[str, Any]) -> dict[str, Any]: """从 system_config 构造生成器 payload。 生成器 payload 是 system_config 的子集，包含： - base_url: str - auth_headers: dict[str, str] - auth_config: dict - auth_type: str - entity_filter: list[str] | None - request_fn: 带 429 退避的 HTTP 请求函数 """ return { "base_url": _resolve_base_url(system_config), "auth_headers": _build_auth_headers(system_config), "auth_config": system_config.get("auth_config") or {}, "auth_type": system_config.get("auth_type", "oauth2_client_credentials"), "entity_filter": _resolve_entity_filter(system_config), "request_fn": _make_request_fn(), }