fix(kdocs): 修复上传线程卡住和超时问题

1. 禁用无效的二分搜索 - _get_cell_value_fast() 使用的 DOM 选择器在金山文档中不存在
2. 移除 _upload_image_to_cell 中重复的导航调用
3. 为 expect_file_chooser 添加 15 秒超时防止无限阻塞
4. 包含看门狗自动恢复机制（之前已实现）

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

services/kdocs_uploader.py

@@ -1,5 +1,9 @@
 #!/usr/bin/env python3
 # -*- coding: utf-8 -*-
+"""
+KDocs Uploader with Auto-Recovery Mechanism
+自动恢复机制：当检测到上传线程卡住时，自动重启线程
+"""
 from __future__ import annotations
 
 import base64
@@ -31,11 +35,16 @@ except Exception:  # pragma: no cover - 运行环境缺少 playwright 时降级
 logger = get_logger()
 config = get_config()
 
+# 看门狗配置
+WATCHDOG_CHECK_INTERVAL = 60  # 每60秒检查一次
+WATCHDOG_TIMEOUT = 300  # 如果5分钟没有活动且队列有任务，认为线程卡住
+
 
 class KDocsUploader:
     def __init__(self) -> None:
         self._queue: queue.Queue = queue.Queue(maxsize=int(os.environ.get("KDOCS_QUEUE_MAXSIZE", "200")))
-        self._thread = threading.Thread(target=self._run, name="kdocs-uploader", daemon=True)
+        self._thread: Optional[threading.Thread] = None
+        self._thread_id = 0  # 线程ID，用于追踪重启次数
         self._running = False
         self._last_error: Optional[str] = None
         self._last_success_at: Optional[float] = None
@@ -49,17 +58,108 @@ class KDocsUploader:
         self._last_login_ok: Optional[bool] = None
         self._doc_url: Optional[str] = None
 
+        # 自动恢复机制相关
+        self._last_activity: float = time.time()  # 最后活动时间
+        self._watchdog_thread: Optional[threading.Thread] = None
+        self._watchdog_running = False
+        self._restart_count = 0  # 重启次数统计
+        self._lock = threading.Lock()  # 线程安全锁
+
     def start(self) -> None:
-        if self._running:
-            return
-        self._running = True
-        self._thread.start()
+        with self._lock:
+            if self._running:
+                return
+            self._running = True
+            self._thread_id += 1
+            self._thread = threading.Thread(
+                target=self._run,
+                name=f"kdocs-uploader-{self._thread_id}",
+                daemon=True
+            )
+            self._thread.start()
+            self._last_activity = time.time()
+
+            # 启动看门狗线程
+            if not self._watchdog_running:
+                self._watchdog_running = True
+                self._watchdog_thread = threading.Thread(
+                    target=self._watchdog_run,
+                    name="kdocs-watchdog",
+                    daemon=True
+                )
+                self._watchdog_thread.start()
+                logger.info("[KDocs] 看门狗线程已启动")
 
     def stop(self) -> None:
-        if not self._running:
-            return
-        self._running = False
-        self._queue.put({"action": "shutdown"})
+        with self._lock:
+            if not self._running:
+                return
+            self._running = False
+            self._watchdog_running = False
+            self._queue.put({"action": "shutdown"})
+
+    def _watchdog_run(self) -> None:
+        """看门狗线程：监控上传线程健康状态"""
+        logger.info("[KDocs] 看门狗开始监控")
+        while self._watchdog_running:
+            try:
+                time.sleep(WATCHDOG_CHECK_INTERVAL)
+
+                if not self._running:
+                    continue
+
+                # 检查线程是否存活
+                if self._thread is None or not self._thread.is_alive():
+                    logger.warning("[KDocs] 检测到上传线程已停止，正在重启...")
+                    self._restart_thread()
+                    continue
+
+                # 检查是否有任务堆积且长时间无活动
+                queue_size = self._queue.qsize()
+                time_since_activity = time.time() - self._last_activity
+
+                if queue_size > 0 and time_since_activity > WATCHDOG_TIMEOUT:
+                    logger.warning(
+                        f"[KDocs] 检测到上传线程可能卡住: "
+                        f"队列={queue_size}, 无活动时间={time_since_activity:.0f}秒"
+                    )
+                    self._restart_thread()
+
+            except Exception as e:
+                logger.warning(f"[KDocs] 看门狗检查异常: {e}")
+
+    def _restart_thread(self) -> None:
+        """重启上传线程"""
+        with self._lock:
+            self._restart_count += 1
+            logger.warning(f"[KDocs] 正在重启上传线程 (第{self._restart_count}次重启)")
+
+            # 清理浏览器资源
+            try:
+                self._cleanup_browser()
+
+            except Exception as e:
+                logger.warning(f"[KDocs] 清理浏览器时出错: {e}")
+
+            # 停止旧线程（如果还在运行）
+            old_running = self._running
+            self._running = False
+
+            # 等待一小段时间让旧线程有机会退出
+            time.sleep(1)
+
+            # 启动新线程
+            self._running = True
+            self._thread_id += 1
+            self._thread = threading.Thread(
+                target=self._run,
+                name=f"kdocs-uploader-{self._thread_id}",
+                daemon=True
+            )
+            self._thread.start()
+            self._last_activity = time.time()
+            self._last_error = f"线程已自动恢复 (第{self._restart_count}次)"
+            logger.info(f"[KDocs] 上传线程已重启 (ID={self._thread_id})")
 
     def get_status(self) -> Dict[str, Any]:
         return {
@@ -68,6 +168,8 @@ class KDocsUploader:
             "last_error": self._last_error,
             "last_success_at": self._last_success_at,
             "last_login_ok": self._last_login_ok,
+            "restart_count": self._restart_count,  # 新增：重启次数
+            "thread_alive": self._thread.is_alive() if self._thread else False,  # 新增：线程状态
         }
 
     def enqueue_upload(
@@ -130,28 +232,57 @@ class KDocsUploader:
             return {"success": False, "error": "操作超时"}
 
     def _run(self) -> None:
-        while True:
-            task = self._queue.get()
-            if not task:
-                continue
-            action = task.get("action")
-            if action == "shutdown":
-                break
-            try:
-                if action == "upload":
-                    self._handle_upload(task.get("payload") or {})
-                elif action == "qr":
-                    result = self._handle_qr(task.get("payload") or {})
-                    task.get("response").put(result)
-                elif action == "clear_login":
-                    result = self._handle_clear_login()
-                    task.get("response").put(result)
-                elif action == "status":
-                    result = self._handle_status_check()
-                    task.get("response").put(result)
-            except Exception as e:
-                logger.warning(f"[KDocs] 处理任务失败: {e}")
+        thread_id = self._thread_id
+        logger.info(f"[KDocs] 上传线程启动 (ID={thread_id})")
 
+        while self._running:
+            try:
+                # 使用超时获取任务，以便定期检查 _running 状态
+                try:
+                    task = self._queue.get(timeout=5)
+                except queue.Empty:
+                    continue
+
+                if not task:
+                    continue
+
+                # 更新最后活动时间
+                self._last_activity = time.time()
+
+                action = task.get("action")
+                if action == "shutdown":
+                    break
+
+                try:
+                    if action == "upload":
+                        self._handle_upload(task.get("payload") or {})
+                    elif action == "qr":
+                        result = self._handle_qr(task.get("payload") or {})
+                        task.get("response").put(result)
+                    elif action == "clear_login":
+                        result = self._handle_clear_login()
+                        task.get("response").put(result)
+                    elif action == "status":
+                        result = self._handle_status_check()
+                        task.get("response").put(result)
+
+                    # 任务处理完成后更新活动时间
+                    self._last_activity = time.time()
+
+                except Exception as e:
+                    logger.warning(f"[KDocs] 处理任务失败: {e}")
+                    # 如果有响应队列，返回错误
+                    if "response" in task and task.get("response"):
+                        try:
+                            task["response"].put({"success": False, "error": str(e)})
+                        except Exception:
+                            pass
+
+            except Exception as e:
+                logger.warning(f"[KDocs] 线程主循环异常: {e}")
+                time.sleep(1)  # 避免异常时的紧密循环
+
+        logger.info(f"[KDocs] 上传线程退出 (ID={thread_id})")
         self._cleanup_browser()
 
     def _load_system_config(self) -> Dict[str, Any]:
@@ -180,6 +311,7 @@ class KDocsUploader:
         except Exception as e:
             self._last_error = f"浏览器启动失败: {e}"
             self._cleanup_browser()
+
             return False
 
     def _cleanup_browser(self) -> None:
@@ -784,6 +916,7 @@ class KDocsUploader:
         self._login_required = False
         self._last_login_ok = None
         self._cleanup_browser()
+
         return {"success": True}
 
     def _handle_status_check(self) -> Dict[str, Any]:
@@ -1335,7 +1468,7 @@ class KDocsUploader:
         logger.info("[KDocs调试] ====================================")
 
     def _find_person_with_unit(
-        self, unit: str, name: str, unit_col: str, max_attempts: int = 50, row_start: int = 0, row_end: int = 0
+        self, unit: str, name: str, unit_col: str, max_attempts: int = 10, row_start: int = 0, row_end: int = 0
     ) -> int:
         """
         查找人员所在行号。
@@ -1359,17 +1492,17 @@ class KDocsUploader:
         # 只搜索姓名 - 这是目前唯一可靠的方式
         logger.info(f"[KDocs调试] 搜索姓名: '{name}'")
 
-        # 首先尝试二分搜索优化
-        binary_result = self._binary_search_person(name, unit_col, row_start, row_end)
-        if binary_result > 0:
-            logger.info(f"[KDocs调试] [OK] 二分搜索成功! 找到行号={binary_result}")
-            # 缓存结果
-            if not hasattr(self, "_person_cache"):
-                self._person_cache = {}
-            self._person_cache[cache_key] = binary_result
-            return binary_result
+        # 注意: 二分搜索已禁用 - _get_cell_value_fast() 使用的 DOM 选择器在金山文档中不存在
+        # 直接使用线性搜索，这是唯一可靠的方法
+        # binary_result = self._binary_search_person(name, unit_col, row_start, row_end)
+        # if binary_result > 0:
+        #     logger.info(f"[KDocs调试] [OK] 二分搜索成功! 找到行号={binary_result}")
+        #     if not hasattr(self, "_person_cache"):
+        #         self._person_cache = {}
+        #     self._person_cache[cache_key] = binary_result
+        #     return binary_result
 
-        # 如果二分搜索失败，回退到线性搜索
+        # 使用线性搜索（Ctrl+F 方式）
         row_num = self._search_and_get_row(
             name, max_attempts=max_attempts, expected_col="C", row_start=row_start, row_end=row_end
         )
@@ -1562,8 +1695,7 @@ class KDocsUploader:
 
     def _upload_image_to_cell(self, row_num: int, image_path: str, image_col: str) -> bool:
         cell_address = f"{image_col}{row_num}"
-        self._navigate_to_cell(cell_address)
-        time.sleep(0.3)
+        # 注意: 移除了重复的导航调用，只保留一次导航
 
         # 清除单元格现有内容
         try:
@@ -1603,7 +1735,8 @@ class KDocsUploader:
 
         try:
             local_option = self._page.get_by_role("option", name="本地")
-            with self._page.expect_file_chooser() as fc_info:
+            # 添加超时防止无限阻塞
+            with self._page.expect_file_chooser(timeout=15000) as fc_info:
                 local_option.click()
             file_chooser = fc_info.value
             file_chooser.set_files(image_path)
@@ -1623,3 +1756,4 @@ def get_kdocs_uploader() -> KDocsUploader:
         _kdocs_uploader = KDocsUploader()
         _kdocs_uploader.start()
     return _kdocs_uploader
+