500 lines
22 KiB
Python
500 lines
22 KiB
Python
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"""群发消息后台协程：串行复用 FlowOrchestrator + SendQueue。
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设计原则：
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- 串行发送（不并行），避免破坏 UI 操作互斥
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- 复用 orchestrator.send_text 的幂等 + 熔断 + 会话缓存
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- 风控规避：间隔随机化 + 内容个性化 + 单批≤200 + 日频次≤3 + 批间隔≥2 小时
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三层幂等：
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- 批级：client_request_id（None 时自动生成 batch_id）
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- 单条：内部按 f"{batch_id}:{to_wxid}" 作为 client_request_id 传给 orchestrator
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- orchestrator：复用 IdemCache（TTL=300s）
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"""
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from __future__ import annotations
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import asyncio
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import logging
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import random
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import time
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import uuid
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from datetime import datetime, timedelta
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from typing import Optional, Any
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from woc_bridge.models import BridgeError, BatchSendRequest, BatchSendStatus, BatchItemResult
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logger = logging.getLogger("woc-bridge")
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# 群发单条间隔抖动（秒）：base=3 ± 1 → [2, 4]
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# orchestrator.send_text 内部已通过 send_queue 串行化并施加 send_delay_ms（默认 3000），
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# 本 worker 在其之上额外施加 2-4s 随机抖动，使得相邻两条群发的总间隔呈现随机性，
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# 降低被风控识别为机器行为的概率。当 worker 抖动 ≥ send_queue 延时时，
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# send_queue 的延时被吸收（worker 主导节奏）。
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_BATCH_JITTER_MIN_SEC = 2.0
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_BATCH_JITTER_MAX_SEC = 4.0
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# 单批发送耗时样本上限（用于均值估算剩余时间）
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_RECENT_SEND_SAMPLE_MAX = 10
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class BatchSendWorker:
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"""群发消息后台协程。"""
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def __init__(
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self,
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orchestrator, # FlowOrchestrator
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send_queue, # SendQueue
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db_reader, # DbReader（用于 nickname 查询）
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config, # BridgeConfig（含 batch_max_per_batch / batch_daily_limit / batch_min_interval_sec）
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) -> None:
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self._orchestrator = orchestrator
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self._send_queue = send_queue
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self._db_reader = db_reader
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self._config = config
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# 任务存储：batch_id -> 任务运行态
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# 运行态字段：req, status, items, task_obj, start_time, end_time, cancel_requested
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self._tasks: dict[str, dict] = {}
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self._active_tasks: dict[str, asyncio.Task] = {}
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# 风控状态
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self._daily_count: int = 0
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self._daily_reset_time: float = self._next_midnight_timestamp() # 下一次重置时间（次日 0 点）
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self._last_batch_end_time: float = 0.0 # 上一批次结束时间（monotonic）
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# 统计：最近 N 条单批发送耗时（秒）
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self._recent_send_sec: list[float] = []
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# 锁：保护 _tasks / _active_tasks / 风控状态
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self._lock = asyncio.Lock()
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# ------------------------------------------------------------------
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# 公共 API
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# ------------------------------------------------------------------
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async def submit_batch(self, req: BatchSendRequest) -> str:
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"""提交群发任务，返回 batch_id。
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Raises:
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BridgeError: 超过单批上限 / 日频次 / 间隔限制 / 重复 batch_id
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"""
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async with self._lock:
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# 1. 风控校验（可能抛 RATE_LIMITED）
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self._reset_daily_count_if_needed()
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self._check_risk_control(req)
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# 2. 生成 batch_id（批级幂等）
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batch_id = req.client_request_id or f"batch_{uuid.uuid4().hex[:16]}"
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if batch_id in self._tasks:
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raise BridgeError(
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code="INVALID_PARAMS",
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message=f"batch_id={batch_id} 已存在（批级幂等命中）",
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http_status=409,
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)
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# 3. targets 去重（保序）
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seen = set()
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unique_targets: list[str] = []
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for wxid in req.targets:
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if wxid not in seen:
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seen.add(wxid)
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unique_targets.append(wxid)
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# 4. 初始化任务运行态
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now_mono = time.monotonic()
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items = [
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BatchItemResult(to_wxid=wxid, status="pending")
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for wxid in unique_targets
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]
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self._tasks[batch_id] = {
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"req": req,
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"status": "pending",
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"items": items,
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"task_obj": None,
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"start_time": now_mono,
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"end_time": None,
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"cancel_requested": False,
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"consecutive_fail": 0,
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}
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# P0 修复：风控状态在 submit_batch 持锁时立即更新，防止并发提交绕过。
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# 原实现在 _run_batch 的 finally 块（批次结束）才更新 _daily_count 和
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# _last_batch_end_time，submit_batch 释放锁后 _run_batch 才运行，
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# 用户可在 1 秒内并发提交 3 批 × 200 = 600 条完全绕过风控。
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# 现在提交时立即递增 _daily_count 并更新 _last_batch_end_time，
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# _run_batch 的 finally 块不再重复递增（cancelled 也不回退，因配额已消耗）。
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self._daily_count += 1
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self._last_batch_end_time = now_mono
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# 5. 启动后台 _run_batch 协程
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task = asyncio.create_task(self._run_batch(batch_id, req, unique_targets))
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self._active_tasks[batch_id] = task
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self._tasks[batch_id]["task_obj"] = task
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logger.info(
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"[batch_worker] 提交群发 batch_id=%s targets=%d content_len=%d",
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batch_id, len(unique_targets), len(req.content),
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)
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return batch_id
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async def _run_batch(
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self,
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batch_id: str,
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req: BatchSendRequest,
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targets: list[str],
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) -> None:
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"""后台串行发送整批。
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P0 修复：整个 for 循环包裹在 try/except CancelledError + try/finally 中，
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确保 cancel/异常时收尾代码（_daily_count++ / _active_tasks 清理 /
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_last_batch_end_time 更新 / end_time 设置）必定执行，避免任务永久卡在 running。
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cancel 中断时剩余 pending 项标记为 skipped。
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"""
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state = self._tasks[batch_id]
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state["status"] = "running"
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items: list[BatchItemResult] = state["items"]
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total = len(items)
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abort_reason: Optional[str] = None
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try:
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for idx, item in enumerate(items):
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# 取消检查
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if state["cancel_requested"]:
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# 剩余全部标记 skipped
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for remain in items[idx:]:
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if remain.status == "pending":
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remain.status = "skipped"
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state["status"] = "cancelled"
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logger.info("[batch_worker] batch_id=%s 已取消（已处理 %d/%d）", batch_id, idx, total)
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break
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# P0 修复：记录当前正在处理的条目索引，cancel 中断时该条目
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# 的 send_text 可能已在 send_queue worker 中执行（future 取消不
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# 中断 worker），消息可能已实际发送，不应标记 skipped。
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state["_current_idx"] = idx
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to_wxid = item.to_wxid
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t_send_start = time.monotonic()
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try:
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# a. 查 nickname 替换 {nickname}
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content = await self._personalize_content(req.content, to_wxid)
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# b. 调 orchestrator.send_text（单条幂等 ID = f"{batch_id}:{to_wxid}"）
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result = await self._orchestrator.send_text(
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to_wxid=to_wxid,
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content=content,
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client_request_id=f"{batch_id}:{to_wxid}",
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)
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# c. 记录结果
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if result.success and result.verified:
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item.status = "success"
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item.verified = True
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state["consecutive_fail"] = 0
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elif result.success and not result.verified and result.skipped:
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# 幂等命中跳过：算成功（已发送过）
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item.status = "skipped"
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item.verified = result.verified
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state["consecutive_fail"] = 0
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elif result.success and not result.verified:
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# 发送成功但校验失败：仍计为 success（消息已发）
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item.status = "success"
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item.verified = False
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state["consecutive_fail"] = 0
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else:
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item.status = "failed"
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item.error_code = result.error_code or "SEND_FAILED"
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item.error_message = result.error or "发送失败"
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state["consecutive_fail"] += 1
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except BridgeError as exc:
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item.status = "failed"
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item.error_code = exc.code
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item.error_message = exc.message
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state["consecutive_fail"] += 1
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logger.warning(
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"[batch_worker] batch_id=%s to=%s BridgeError code=%s",
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batch_id, to_wxid, exc.code,
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)
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except Exception as exc: # 兜底
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item.status = "failed"
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item.error_code = "SEND_FAILED"
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item.error_message = str(exc)
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state["consecutive_fail"] += 1
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logger.exception(
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"[batch_worker] batch_id=%s to=%s 异常",
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batch_id, to_wxid,
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)
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# 记录单条耗时样本（用于剩余时间估算）
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send_sec = time.monotonic() - t_send_start
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self._recent_send_sec.append(send_sec)
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if len(self._recent_send_sec) > _RECENT_SEND_SAMPLE_MAX:
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self._recent_send_sec = self._recent_send_sec[-_RECENT_SEND_SAMPLE_MAX:]
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# d. abort_on_consecutive_fail 触发：整批 failed，剩余 skipped
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if state["consecutive_fail"] >= req.abort_on_consecutive_fail:
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abort_reason = (
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f"连续失败 {state['consecutive_fail']} 次，"
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f"达到阈值 {req.abort_on_consecutive_fail}，整批中止"
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)
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logger.warning(
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"[batch_worker] batch_id=%s 触发中止：%s", batch_id, abort_reason
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)
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for remain in items[idx + 1:]:
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if remain.status == "pending":
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remain.status = "skipped"
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state["status"] = "failed"
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state["abort_reason"] = abort_reason
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break
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# e. 间隔抖动（非最后一条）
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if idx < total - 1 and not state["cancel_requested"]:
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jitter = random.uniform(_BATCH_JITTER_MIN_SEC, _BATCH_JITTER_MAX_SEC)
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await asyncio.sleep(jitter)
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else:
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# for 循环正常结束（未 break / 未 cancel）
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if state["status"] not in ("cancelled", "failed"):
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state["status"] = "completed"
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except asyncio.CancelledError:
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# P0 修复：cancel_batch 调用 task.cancel() 在 await 点抛 CancelledError，
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# 剩余 pending 项标记 skipped，状态置 cancelled。
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# 不 re-raise 以确保 finally 收尾代码正常执行且 cancel_batch 的 await task 正常返回。
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#
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# P0 修复（cancel 误标 skipped）：当前正在发送的条目（_current_idx）
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# 的 send_text 可能已在 send_queue worker 中实际执行（future 取消不
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# 中断 worker），消息可能已发出。将该条目标为 "unknown" 而非 "skipped"，
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# 避免数据不一致（用户看到 skipped 但接收方收到了消息）。
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current_idx = state.pop("_current_idx", None)
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for i, item in enumerate(items):
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if item.status == "pending":
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if current_idx is not None and i == current_idx:
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# 正在发送中被中断，状态不确定
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item.status = "unknown"
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item.error_message = "发送被取消，实际发送状态未知"
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else:
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item.status = "skipped"
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if state["status"] not in ("completed", "failed"):
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state["status"] = "cancelled"
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state["abort_reason"] = "用户取消"
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logger.info(
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"[batch_worker] batch_id=%s 被 cancel 中断（剩余项标 skipped，当前项标 unknown）",
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batch_id,
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)
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finally:
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# P0 修复：收尾代码移入 finally，确保 cancel/异常/正常结束都执行
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# 注意：_daily_count 和 _last_batch_end_time 已在 submit_batch 中更新，
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# 此处不再重复递增（避免双重计数）。
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state["end_time"] = time.monotonic()
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async with self._lock:
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# _last_batch_end_time 更新为实际结束时间（更精确）
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self._last_batch_end_time = state["end_time"]
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self._active_tasks.pop(batch_id, None)
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logger.info(
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"[batch_worker] batch_id=%s 结束 status=%s success=%d failed=%d skipped=%d 耗时=%.1fs",
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batch_id, state["status"],
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sum(1 for it in items if it.status == "success"),
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sum(1 for it in items if it.status == "failed"),
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sum(1 for it in items if it.status == "skipped"),
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|
state["end_time"] - state["start_time"],
|
|||
|
|
)
|
|||
|
|
|
|||
|
|
async def get_status(self, batch_id: str) -> Optional[BatchSendStatus]:
|
|||
|
|
"""查询任务状态。"""
|
|||
|
|
async with self._lock:
|
|||
|
|
state = self._tasks.get(batch_id)
|
|||
|
|
if state is None:
|
|||
|
|
return None
|
|||
|
|
return self._build_status(batch_id, state)
|
|||
|
|
|
|||
|
|
async def cancel_batch(self, batch_id: str) -> bool:
|
|||
|
|
"""取消群发任务。
|
|||
|
|
|
|||
|
|
Returns:
|
|||
|
|
True=已标记取消，False=任务不存在或已结束
|
|||
|
|
"""
|
|||
|
|
async with self._lock:
|
|||
|
|
state = self._tasks.get(batch_id)
|
|||
|
|
if state is None:
|
|||
|
|
return False
|
|||
|
|
if state["status"] in ("completed", "failed", "cancelled"):
|
|||
|
|
return False
|
|||
|
|
state["cancel_requested"] = True
|
|||
|
|
task = self._active_tasks.get(batch_id)
|
|||
|
|
# 在锁外 await，避免阻塞其他查询
|
|||
|
|
if task is not None and not task.done():
|
|||
|
|
task.cancel()
|
|||
|
|
try:
|
|||
|
|
await task
|
|||
|
|
except asyncio.CancelledError:
|
|||
|
|
pass
|
|||
|
|
except Exception:
|
|||
|
|
pass
|
|||
|
|
return True
|
|||
|
|
|
|||
|
|
async def list_batches(self, limit: int = 20) -> list[BatchSendStatus]:
|
|||
|
|
"""列出最近 N 条群发任务（按提交时间倒序）。"""
|
|||
|
|
async with self._lock:
|
|||
|
|
# 按 start_time 倒序
|
|||
|
|
sorted_ids = sorted(
|
|||
|
|
self._tasks.keys(),
|
|||
|
|
key=lambda bid: self._tasks[bid]["start_time"],
|
|||
|
|
reverse=True,
|
|||
|
|
)[:limit]
|
|||
|
|
return [
|
|||
|
|
self._build_status(bid, self._tasks[bid])
|
|||
|
|
for bid in sorted_ids
|
|||
|
|
]
|
|||
|
|
|
|||
|
|
async def stop(self) -> None:
|
|||
|
|
"""停止所有运行中任务（lifespan finally 调用）。
|
|||
|
|
|
|||
|
|
取消所有 _active_tasks 中的 asyncio.Task，等待最多 5s。
|
|||
|
|
"""
|
|||
|
|
async with self._lock:
|
|||
|
|
running = list(self._active_tasks.items())
|
|||
|
|
for batch_id, task in running:
|
|||
|
|
if not task.done():
|
|||
|
|
task.cancel()
|
|||
|
|
if not running:
|
|||
|
|
return
|
|||
|
|
# 等待所有任务落地（带总超时 5s）
|
|||
|
|
try:
|
|||
|
|
await asyncio.wait_for(
|
|||
|
|
asyncio.gather(
|
|||
|
|
*[t for _, t in running if not t.done()],
|
|||
|
|
return_exceptions=True,
|
|||
|
|
),
|
|||
|
|
timeout=5.0,
|
|||
|
|
)
|
|||
|
|
except asyncio.TimeoutError:
|
|||
|
|
logger.warning("[batch_worker] stop() 等待任务落地超时 5s，强制返回")
|
|||
|
|
# 标记未结束任务为 cancelled
|
|||
|
|
async with self._lock:
|
|||
|
|
for batch_id, _ in running:
|
|||
|
|
state = self._tasks.get(batch_id)
|
|||
|
|
if state and state["status"] in ("pending", "running"):
|
|||
|
|
state["status"] = "cancelled"
|
|||
|
|
state["abort_reason"] = "bridge 关闭，强制取消"
|
|||
|
|
|
|||
|
|
# ------------------------------------------------------------------
|
|||
|
|
# 风控与统计
|
|||
|
|
# ------------------------------------------------------------------
|
|||
|
|
def _check_risk_control(self, req: BatchSendRequest) -> None:
|
|||
|
|
"""风控校验：单批上限 / 日频次 / 间隔限制。
|
|||
|
|
|
|||
|
|
Raises:
|
|||
|
|
BridgeError: 违反风控规则（RATE_LIMITED / INVALID_PARAMS）
|
|||
|
|
"""
|
|||
|
|
max_per_batch = getattr(self._config, "batch_max_per_batch", 200)
|
|||
|
|
daily_limit = getattr(self._config, "batch_daily_limit", 3)
|
|||
|
|
min_interval = getattr(self._config, "batch_min_interval_sec", 7200)
|
|||
|
|
|
|||
|
|
# 1. targets 去重后 ≤ batch_max_per_batch
|
|||
|
|
unique_count = len(set(req.targets))
|
|||
|
|
if unique_count > max_per_batch:
|
|||
|
|
raise BridgeError(
|
|||
|
|
code="INVALID_PARAMS",
|
|||
|
|
message=f"群发目标数 {unique_count} 超过单批上限 {max_per_batch}",
|
|||
|
|
http_status=400,
|
|||
|
|
)
|
|||
|
|
|
|||
|
|
# 2. 当日已群发 < batch_daily_limit，否则 RATE_LIMITED + retry_after 到次日 0 点
|
|||
|
|
if self._daily_count >= daily_limit:
|
|||
|
|
retry_after = max(1, int(self._daily_reset_time - time.time()))
|
|||
|
|
raise BridgeError(
|
|||
|
|
code="RATE_LIMITED",
|
|||
|
|
message=f"当日群发次数已达上限 {daily_limit}，请次日重试",
|
|||
|
|
details={"retry_after": retry_after},
|
|||
|
|
)
|
|||
|
|
|
|||
|
|
# 3. 上一批次结束 ≥ batch_min_interval_sec，否则 RATE_LIMITED + retry_after
|
|||
|
|
if self._last_batch_end_time > 0:
|
|||
|
|
elapsed = time.monotonic() - self._last_batch_end_time
|
|||
|
|
if elapsed < min_interval:
|
|||
|
|
retry_after = int(min_interval - elapsed) + 1
|
|||
|
|
raise BridgeError(
|
|||
|
|
code="RATE_LIMITED",
|
|||
|
|
message=f"群发间隔不足，需等待 {retry_after}s 后再发起",
|
|||
|
|
details={"retry_after": retry_after},
|
|||
|
|
)
|
|||
|
|
|
|||
|
|
def _compute_estimated_remaining_sec(self, remaining: int) -> Optional[int]:
|
|||
|
|
"""计算剩余时间：remaining * avg_send_sec（avg 取最近 10 条均值）。
|
|||
|
|
|
|||
|
|
无样本时返回 None。
|
|||
|
|
"""
|
|||
|
|
if not self._recent_send_sec or remaining <= 0:
|
|||
|
|
return None
|
|||
|
|
avg = sum(self._recent_send_sec) / len(self._recent_send_sec)
|
|||
|
|
# 加上平均抖动
|
|||
|
|
avg_jitter = (_BATCH_JITTER_MIN_SEC + _BATCH_JITTER_MAX_SEC) / 2
|
|||
|
|
return int(remaining * (avg + avg_jitter))
|
|||
|
|
|
|||
|
|
def _reset_daily_count_if_needed(self) -> None:
|
|||
|
|
"""跨日重置 _daily_count。"""
|
|||
|
|
now = time.time()
|
|||
|
|
if now >= self._daily_reset_time:
|
|||
|
|
self._daily_count = 0
|
|||
|
|
self._daily_reset_time = self._next_midnight_timestamp()
|
|||
|
|
|
|||
|
|
@staticmethod
|
|||
|
|
def _next_midnight_timestamp() -> float:
|
|||
|
|
"""返回次日 0 点（本地时区）的 Unix 时间戳。"""
|
|||
|
|
now = datetime.now()
|
|||
|
|
next_midnight = (now + timedelta(days=1)).replace(
|
|||
|
|
hour=0, minute=0, second=0, microsecond=0
|
|||
|
|
)
|
|||
|
|
return next_midnight.timestamp()
|
|||
|
|
|
|||
|
|
# ------------------------------------------------------------------
|
|||
|
|
# 内部辅助
|
|||
|
|
# ------------------------------------------------------------------
|
|||
|
|
async def _personalize_content(self, content: str, to_wxid: str) -> str:
|
|||
|
|
"""按目标联系人替换 {nickname} 占位符。
|
|||
|
|
|
|||
|
|
无 {nickname} 占位符时原样返回；DB 不可用时回退到 wxid。
|
|||
|
|
"""
|
|||
|
|
if "{nickname}" not in content:
|
|||
|
|
return content
|
|||
|
|
nickname = to_wxid # 回退值
|
|||
|
|
if self._db_reader is not None:
|
|||
|
|
try:
|
|||
|
|
contact = await asyncio.to_thread(
|
|||
|
|
self._db_reader.get_contact_detail, to_wxid
|
|||
|
|
)
|
|||
|
|
if contact:
|
|||
|
|
nickname = (
|
|||
|
|
contact.get("remark")
|
|||
|
|
or contact.get("nickname")
|
|||
|
|
or to_wxid
|
|||
|
|
)
|
|||
|
|
except Exception as exc:
|
|||
|
|
logger.debug(
|
|||
|
|
"[batch_worker] 查 nickname 失败 to=%s: %s，回退 wxid",
|
|||
|
|
to_wxid, exc,
|
|||
|
|
)
|
|||
|
|
return content.replace("{nickname}", nickname)
|
|||
|
|
|
|||
|
|
def _build_status(self, batch_id: str, state: dict) -> BatchSendStatus:
|
|||
|
|
"""从任务运行态构造 BatchSendStatus（调用方持锁）。"""
|
|||
|
|
items: list[BatchItemResult] = state["items"]
|
|||
|
|
total = len(items)
|
|||
|
|
success = sum(1 for it in items if it.status == "success")
|
|||
|
|
failed = sum(1 for it in items if it.status == "failed")
|
|||
|
|
skipped = sum(1 for it in items if it.status == "skipped")
|
|||
|
|
processed = success + failed + skipped
|
|||
|
|
progress = (processed / total) if total > 0 else 0.0
|
|||
|
|
remaining = total - processed
|
|||
|
|
|
|||
|
|
return BatchSendStatus(
|
|||
|
|
batch_id=batch_id,
|
|||
|
|
status=state["status"],
|
|||
|
|
total=total,
|
|||
|
|
processed=processed,
|
|||
|
|
success=success,
|
|||
|
|
failed=failed,
|
|||
|
|
skipped=skipped,
|
|||
|
|
progress=round(progress, 4),
|
|||
|
|
estimated_remaining_sec=self._compute_estimated_remaining_sec(remaining),
|
|||
|
|
abort_reason=state.get("abort_reason"),
|
|||
|
|
items=items,
|
|||
|
|
)
|