"""worker 主循环与每任务执行流 主循环（规格 §6）： while running: task = await gateway.lease(worker_id, wait=30) if task is None: continue if local_db.has_finished(task.task_id): # 本地幂等闸门 await gateway.report(...); continue if task.lease_count > 1: # 恢复领取 verdict = await verify_on_site(task) if verdict.already_ordered: await report(...); continue if verdict.unknown: await report(needs_human); continue async with renew_lease_every(60): await execute(task) 每个动作的顺序固定为：动作 → 落证据 → 写本地 SQLite → 回报 gateway。 顺序不能颠倒——先落证据再回报，保证服务器上看到的状态一定有本地证据可查。 """ from __future__ import annotations import asyncio import contextlib import logging from typing import TYPE_CHECKING from app.shared.errors import AppError, CheckoutBlockedError, OrderGuardError from app.shared.task_state import OrderState, TaskStatus from app.trading.worker import verify from app.trading.worker.client import GatewayClient from app.trading.worker.evidence import EvidenceStore from app.trading.worker.local_db import LocalDB from app.trading.worker.models import LeaseTask from app.trading.worker.site_interact import SiteInteractor if TYPE_CHECKING: from app.shared.config import Settings logger = logging.getLogger(__name__) def _coerce_state(value: str | None) -> OrderState: """把网关返回的 state 字符串安全地包成 OrderState；None 或非法值回落到 CREATED""" if not value: return OrderState.CREATED try: return OrderState(value) except ValueError: logger.warning("未知的 order state 字符串，回落到 CREATED：%s", value) return OrderState.CREATED class WorkerRunner: """worker 主循环与执行流 持有 gateway 客户端、本地 DB、证据存储。`run()` 是常驻 asyncio 任务， `handle()` 处理单个任务，`execute()` 是站点交互的实际调度（当前多数步骤未实现）。 """ def __init__( self, *, settings: "Settings", gateway_client: GatewayClient, local_db: LocalDB, evidence: EvidenceStore, site: SiteInteractor, ): self._settings = settings self._gateway = gateway_client self._db = local_db self._evidence = evidence self._site = site self._running = False # 付款后监控后台任务：task_id → asyncio.Task。与主循环解耦（不阻塞领下一单）， # 详见 _spawn_monitor / _monitor_order。用 set 而非 list 是因为只需要成员管理， # 不需要顺序。 self._monitor_tasks: set[asyncio.Task] = set() def stop(self) -> None: self._running = False async def cancel_monitors(self) -> None: """服务关闭时调用：取消所有还在跑的付款后监控后台任务并等它们收尾 必须在 SiteInteractor.close() 之前调用——监控任务还在用同一个 Playwright context，先关 context 再取消会导致监控任务在 await 到一半时 踩上已关闭的资源，报一堆无意义的异常。 """ tasks = list(self._monitor_tasks) for t in tasks: t.cancel() for t in tasks: with contextlib.suppress(asyncio.CancelledError): await t @property def worker_id(self) -> str: return self._settings.worker_id_effective # ---- 主循环 ---- async def run(self) -> None: """常驻循环：长轮询领任务，按 §6 调度""" self._running = True logger.info("worker 启动：worker_id=%s", self.worker_id) while self._running: try: task = await self._gateway.lease(self.worker_id, wait=30) except AppError as exc: logger.warning("lease 失败：%s (err=%s)", exc.message, exc.err_code) await asyncio.sleep(5) continue except Exception: # noqa: BLE001 logger.exception("lease 异常") await asyncio.sleep(5) continue if task is None: continue try: await self.handle(task) except Exception: # noqa: BLE001 # 任何未预期的异常都不应让 worker 退出 logger.exception("handle 任务异常：task_id=%s", task.task_id) # ---- 单任务调度 ---- async def handle(self, task: LeaseTask) -> None: """单任务调度入口：本地幂等闸门 → 恢复核对 → 执行""" # 本地幂等闸门：之前已完成过的任务不再执行 if await self._db.has_finished(task.task_id): final_state = await self._db.final_state(task.task_id) logger.info( "本地已完成，补报终态：task_id=%s state=%s", task.task_id, final_state ) await self._report_safe( task, state=_coerce_state(final_state), detail="本地已完成，补报避免重复执行", terminal=True, ) return # 恢复领取：lease_count > 1 表示 stale → reclaim，必须先核对站点订单 if task.lease_count > 1: await self._handle_recovery(task) return # 常规执行 await self._execute_with_renewal(task) async def _handle_recovery(self, task: LeaseTask) -> None: """lease_count > 1 的恢复路径：先核对，不直接执行""" logger.warning( "恢复领取（lease_count=%s），先核对站点订单：task_id=%s", task.lease_count, task.task_id, ) verdict = await verify.verify_on_site(task, gateway=self._gateway, site=self._site) if verdict.verdict == verify.VerifyVerdict.ALREADY_ORDERED: await self._report_safe( task, state=OrderState.ORDERED, site_order_id=verdict.site_order_id, detail=f"核对结论：已下单（{verdict.detail}）", terminal=True, terminal_status=TaskStatus.SUCCEEDED, ) await self._db.ensure_started(task.task_id, task.site, task.intent) await self._db.mark_finished(task.task_id, OrderState.ORDERED.value) return # NOT_ORDERED 也走 needs_human（2026-08-13 verify_on_site 已实现，会真的 # 返回这个值，但刻意仍不自动重新执行）：核对逻辑目前只有「账号 1 笔订单」 # 的真实数据支撑 ALREADY_ORDERED 分支，NOT_ORDERED 分支只验证过逻辑本身， # 没有被真实多单场景跑过——在这条判断被更多真实数据验证之前，即使确认 # 未下单也交人工决定是否重新提交，不自动触发新的下单动作。这是刻意的 # 保守选择，不是遗漏；要不要放开需要显式决定，不在这里静默改。 await self._report_safe( task, state=_coerce_state(task.known_state), detail=f"恢复核对结论（{verdict.verdict.value}）：{verdict.detail}", terminal=True, terminal_status=TaskStatus.NEEDS_HUMAN, ) # ---- 常规执行 ---- async def _execute_with_renewal(self, task: LeaseTask) -> None: """在租约自动续期的上下文里执行任务""" async with self._renew_lease_every(task, interval=60): try: await self.execute(task) except NotImplementedError as exc: # 站点交互未实现（规格 §10）：上报 needs_human，不视为 worker 失败 logger.warning( "站点交互未实现，转 needs_human：task_id=%s what=%s", task.task_id, exc, ) await self._report_safe( task, state=_coerce_state(task.known_state), detail=f"站点交互未实现：{exc}", terminal=True, terminal_status=TaskStatus.NEEDS_HUMAN, ) except OrderGuardError as exc: # 金额守卫等闸门拦截：上报 needs_human，站点侧无提交动作 logger.warning( "下单闸门拦截，转 needs_human：task_id=%s msg=%s", task.task_id, exc.message, ) await self._report_safe( task, state=_coerce_state(task.known_state), detail=exc.message, terminal=True, terminal_status=TaskStatus.NEEDS_HUMAN, ) except CheckoutBlockedError as exc: # 站点风控拦截（session upgrade / 3DS 等）：转 needs_human 交人工接管， # 不当普通失败重试（规格 §10.1） logger.warning( "结算被站点风控拦截，转 needs_human：task_id=%s msg=%s", task.task_id, exc.message, ) await self._report_safe( task, state=_coerce_state(task.known_state), detail=exc.message, terminal=True, terminal_status=TaskStatus.NEEDS_HUMAN, ) except AppError as exc: logger.warning( "执行失败：task_id=%s code=%s msg=%s", task.task_id, exc.err_code, exc.message, ) await self._report_safe( task, state=_coerce_state(task.known_state), detail=exc.message, terminal=True, terminal_status=TaskStatus.FAILED, ) async def execute(self, task: LeaseTask) -> None: """站点交互的实际调度：加购 → 校验 → 确认页 → 金额守卫 → 提交 → 付款 每一步的顺序：动作 → 落证据 → 写本地 SQLite → 回报 gateway。 站点交互当前未实现（site_interact 抛 NotImplementedError），第一步就会 转到 _execute_with_renewal 的 except 分支上报 needs_human。 """ await self._db.ensure_started(task.task_id, task.site, task.intent) # 交易服务只覆盖乐天市场。其他站点直接转人工 if task.site != "rakuten": raise NotImplementedError(f"site={task.site} 暂不在交易服务范围内（仅 rakuten）") # 步骤 1：加购 await self._run_step( task, step_no=1, step_name="cart-add", action=lambda: self._site.add_to_cart(task), state=OrderState.IN_CART, detail="已加入购物车", ) # 步骤 2：校验购物车 await self._run_step( task, step_no=2, step_name="cart-check", action=lambda: self._site.verify_cart(task), state=OrderState.IN_CART, detail="购物车已校验", ) # 步骤 3：进入下单确认页 + 金额守卫 checkout_html = await self._site.enter_checkout(task) summary = await self._site.parse_checkout(checkout_html) self._enforce_amount_guard(task, summary.payable_yen) await self._run_step( task, step_no=3, step_name="order-confirm", action=self._noop(), state=OrderState.CREATED, detail=f"下单确认页已解析：应付 {summary.payable_yen} 円", html=checkout_html, evidence_meta={ "payable_yen": summary.payable_yen, "site_order_id": summary.site_order_id, "pay_deadline": summary.pay_deadline, }, ) # 步骤 4：提交下单 site_order_id = await self._site.submit_order(task) await self._run_step( task, step_no=4, step_name="order-submit", action=self._noop(), state=OrderState.ORDERED, site_order_id=site_order_id, detail=f"已提交下单，站点订单号 {site_order_id}", ) # 步骤 5：付款 await self._run_step( task, step_no=5, step_name="payment", action=lambda: self._site.pay(task, site_order_id), state=OrderState.AWAITING_PAYMENT, site_order_id=site_order_id, payable_yen=summary.payable_yen, pay_deadline=summary.pay_deadline, detail="已进入付款流程", ) await self._report_safe( task, state=OrderState.PAID, site_order_id=site_order_id, payable_yen=summary.payable_yen, pay_deadline=summary.pay_deadline, detail="付款完成", terminal=True, terminal_status=TaskStatus.SUCCEEDED, ) await self._db.mark_finished(task.task_id, OrderState.PAID.value) # 步骤 6：付款后监控——后台常驻轮询，不阻塞主循环领下一单（规格 §6） self._spawn_monitor(task, site_order_id) def _spawn_monitor(self, task: LeaseTask, site_order_id: str) -> None: """把 _monitor_order 起成独立的后台任务，登记到 _monitor_tasks 便于关服时收尾""" monitor_task = asyncio.create_task( self._monitor_order(task, site_order_id), name=f"monitor-{task.task_id}" ) self._monitor_tasks.add(monitor_task) monitor_task.add_done_callback(self._monitor_tasks.discard) async def _monitor_order(self, task: LeaseTask, site_order_id: str) -> None: """付款后台轮询：订单配送阶段变化时继续 report（规格 §6「付款后监控」） 任务本身已经在 execute() 里上报过 succeeded 终态——这里的 report 都是 `terminal=False` 的追加上报（规格 §4.5：任务已 terminal 的仍可上报， gateway 追加到 task_reports），监控本身的成败不影响已经完成的下单结果。 轮询间隔/次数上限见 settings.order_monitor_poll_interval_seconds / order_monitor_max_checks；达到上限仍未看到「配達完了」不算失败，只是 停止追踪（记一条 warning）。单次探测异常（登录态失效、页面打不开）只记 日志、下一轮重试，不能把异常抛出去——这是后台任务，没有人等着 catch 它， 未捕获异常会被 asyncio 直接吞掉且只在垃圾回收时打一条难查的警告。 """ last_state: OrderState | None = None step_no = 6 interval = self._settings.order_monitor_poll_interval_seconds max_checks = self._settings.order_monitor_max_checks for attempt in range(1, max_checks + 1): await asyncio.sleep(interval) try: snapshot = await self._site.check_order_status(site_order_id) except Exception: logger.warning( "订单监控探测失败（第 %s/%s 次），下一轮继续重试：" "task_id=%s site_order_id=%s", attempt, max_checks, task.task_id, site_order_id, exc_info=True, ) continue if not snapshot.found: logger.info( "订单监控：第 %s/%s 次仍未在详情页找到订单号，继续轮询：task_id=%s", attempt, max_checks, task.task_id, ) continue if snapshot.order_state is None or snapshot.order_state == last_state: continue last_state = snapshot.order_state step_name = f"monitor-{snapshot.order_state.value}" detail = f"订单监控：进度「{snapshot.stage_label}」→ {snapshot.order_state.value}" evidence_ref = self._evidence.write_step( task.task_id, step_no, step_name, html=snapshot.html, meta={ "step": step_name, "state": snapshot.order_state.value, "stage_label": snapshot.stage_label, }, ) await self._db.index_evidence(task.task_id, step_no, step_name, evidence_ref) await self._db.record_event( task.task_id, snapshot.order_state.value, detail=detail, evidence_ref=evidence_ref, ) await self._report_safe( task, state=snapshot.order_state, detail=detail, site_order_id=site_order_id, ) step_no += 1 if snapshot.order_state == OrderState.DELIVERED: logger.info("订单监控：已送达，停止轮询：task_id=%s", task.task_id) return logger.warning( "订单监控达到最大轮询次数 %s 仍未看到「配達完了」，停止追踪：task_id=%s", max_checks, task.task_id, ) def _enforce_amount_guard(self, task: LeaseTask, payable_yen: int) -> None: """金额守卫：实际应付超过 intent.max_total_yen 或 RAKUTEN_ORDER_MAX_TOTAL_YEN 时拦截""" intent = task.intent or {} limit = intent.get("max_total_yen") if limit is None or limit <= 0: limit = self._settings.order_max_total_yen if limit > 0 and payable_yen > limit: raise OrderGuardError( f"实际应付 {payable_yen} 円超过上限 {limit} 円" f"（task_id={task.task_id}）" ) @staticmethod def _noop() -> "callable": async def _f() -> None: return None return _f async def _run_step( self, task: LeaseTask, *, step_no: int, step_name: str, action: "callable", state: OrderState, detail: str, site_order_id: str | None = None, payable_yen: int | None = None, pay_deadline: str | None = None, evidence_meta: dict | None = None, html: str | None = None, ) -> None: """单步执行：动作 → 落证据 → 写本地 → 回报 gateway `action` 的返回值若是字符串，视为该步骤要落盘的页面 HTML（add_to_cart / verify_cart 均已改为返回渲染后的页面）；显式传入的 `html` 优先级更高， 供 step3 等已经单独拿到页面 HTML 的调用点直接使用。 """ result = await action() if html is None and isinstance(result, str): html = result meta = { "step": step_name, "state": state.value, **(evidence_meta or {}), } evidence_ref = self._evidence.write_step( task.task_id, step_no, step_name, html=html, meta=meta ) await self._db.index_evidence(task.task_id, step_no, step_name, evidence_ref) await self._db.record_event( task.task_id, state.value, detail=detail, evidence_ref=evidence_ref ) await self._gateway.report( task.task_id, self.worker_id, state=state, payable_yen=payable_yen, pay_deadline=pay_deadline, site_order_id=site_order_id, evidence_ref=evidence_ref, detail=detail, ) async def _report_safe( self, task: LeaseTask, *, state: OrderState, detail: str, terminal: bool = False, terminal_status: TaskStatus | None = None, site_order_id: str | None = None, payable_yen: int | None = None, pay_deadline: str | None = None, ) -> None: """回报 gateway，失败只记日志不抛——主循环不能因为回报失败退出""" try: await self._gateway.report( task.task_id, self.worker_id, state=state, detail=detail, terminal=terminal, terminal_status=terminal_status, site_order_id=site_order_id, payable_yen=payable_yen, pay_deadline=pay_deadline, ) except Exception: # noqa: BLE001 logger.exception("回报 gateway 失败：task_id=%s state=%s", task.task_id, state) @contextlib.asynccontextmanager async def _renew_lease_every(self, task: LeaseTask, *, interval: int): """后台任务：每隔 interval 秒续租一次。退出时停掉""" stop_event = asyncio.Event() async def _loop() -> None: while not stop_event.is_set(): try: await asyncio.wait_for(stop_event.wait(), timeout=interval) except asyncio.TimeoutError: pass if stop_event.is_set(): return try: await self._gateway.renew(task.task_id, self.worker_id) except AppError as exc: logger.warning( "续租失败：task_id=%s code=%s msg=%s", task.task_id, exc.err_code, exc.message, ) return except Exception: # noqa: BLE001 logger.exception("续租异常：task_id=%s", task.task_id) return renewal = asyncio.create_task(_loop(), name=f"renew-{task.task_id}") try: yield finally: stop_event.set() with contextlib.suppress(asyncio.CancelledError): await renewal