feat: 添加企微群机器人Webhook推送（无需IP白名单）

- wechat_service 新增 send_webhook_alarm 方法（markdown格式）
- notify_dispatch 优先使用Webhook，失败降级到应用消息
- config 新增 WECHAT_WEBHOOK_URL 配置项

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/config.py

@@ -62,6 +62,7 @@ class WeChatConfig:
     enabled: bool = False
     test_uids: str = ""        # 演示模式：逗号分隔的企微userid，如 "zhangsan,lisi"
     service_base_url: str = "" # H5页面公网地址，如 https://vsp.viewshanghai.com
+    webhook_url: str = ""      # 群机器人Webhook地址
 
 
 @dataclass
@@ -170,6 +171,7 @@ def load_settings() -> Settings:
             enabled=os.getenv("WECHAT_ENABLED", "false").lower() == "true",
             test_uids=os.getenv("WECHAT_TEST_UIDS", ""),
             service_base_url=os.getenv("SERVICE_BASE_URL", ""),
+            webhook_url=os.getenv("WECHAT_WEBHOOK_URL", ""),
         ),
         agent=AgentConfig(
             llm_api_key=os.getenv("DASHSCOPE_API_KEY", ""),

app/services/notify_dispatch.py

@@ -81,17 +81,33 @@ async def process_alarm_notification(alarm_data: Dict):
 
         # ========== 3. 推送企微通知 ==========
         wechat_service = get_wechat_service()
-        if not wechat_service.enabled:
-            logger.info("企微未启用，跳过推送")
-            return
-
-        user_ids = [p["wechat_uid"] for p in persons]
+        service_base_url = settings.wechat.service_base_url or f"http://{settings.app.host}:{settings.app.port}"
         event_time_str = (
             event_time.strftime("%Y-%m-%d %H:%M:%S")
             if isinstance(event_time, datetime) else str(event_time or "")
         )
+        detail_url = f"{service_base_url}/static/alarm_detail.html?alarm_id={alarm_id}"
 
-        await wechat_service.send_alarm_card(
+        sent = False
+
+        # 优先 Webhook（无需IP白名单）
+        if settings.wechat.webhook_url:
+            sent = await wechat_service.send_webhook_alarm(
+                webhook_url=settings.wechat.webhook_url,
+                alarm_id=alarm_id,
+                alarm_type=alarm_type,
+                area_name=area_name,
+                camera_name=camera_name,
+                description=description,
+                event_time=event_time_str,
+                alarm_level=alarm_level,
+                detail_url=detail_url,
+            )
+
+        # Webhook 未配置或失败时，降级到应用消息
+        if not sent and wechat_service.enabled:
+            user_ids = [p["wechat_uid"] for p in persons]
+            sent = await wechat_service.send_alarm_card(
                 user_ids=user_ids,
                 alarm_id=alarm_id,
                 alarm_type=alarm_type,
@@ -101,10 +117,13 @@ async def process_alarm_notification(alarm_data: Dict):
                 snapshot_url=snapshot_url,
                 event_time=event_time_str,
                 alarm_level=alarm_level,
-            service_base_url=settings.wechat.service_base_url or f"http://{settings.app.host}:{settings.app.port}",
+                service_base_url=service_base_url,
             )
 
-        logger.info(f"告警通知完成: {alarm_id} → {len(persons)} 人")
+        if not sent:
+            logger.warning(f"告警通知未发送: {alarm_id}, webhook和应用消息均未成功")
+        else:
+            logger.info(f"告警通知完成: {alarm_id}")
 
     except Exception as e:
         logger.error(f"告警通知处理失败: {alarm_id}, error={e}", exc_info=True)

app/services/wechat_service.py

@@ -6,11 +6,10 @@ V1 使用应用消息 + 文本卡片，后期扩展为模板卡片。
 """
 
 import httpx
-import logging
 import time
 from typing import Optional, List
 
-logger = logging.getLogger(__name__)
+from app.utils.logger import logger
 
 
 class WeChatService:
@@ -177,6 +176,50 @@ class WeChatService:
             logger.error(f"发送文本消息异常: {e}")
             return False
 
+    async def send_webhook_alarm(
+        self,
+        webhook_url: str,
+        alarm_id: str,
+        alarm_type: str,
+        area_name: str,
+        camera_name: str,
+        description: str,
+        event_time: str,
+        alarm_level: int = 2,
+        detail_url: str = "",
+    ) -> bool:
+        """通过群机器人 Webhook 发送告警通知（无需IP白名单）"""
+        type_names = {"leave_post": "人员离岗", "intrusion": "周界入侵"}
+        level_names = {1: "提醒", 2: "一般", 3: "严重", 4: "紧急"}
+
+        type_name = type_names.get(alarm_type, alarm_type)
+        level_name = level_names.get(alarm_level, "一般")
+
+        content = (
+            f"## 【{level_name}】{type_name}告警\n"
+            f"> 区域：<font color=\"warning\">{area_name}</font>\n"
+            f"> 摄像头：{camera_name}\n"
+            f"> 时间：{event_time}\n"
+            f"> AI描述：**{description}**\n"
+        )
+        if detail_url:
+            content += f"> [查看详情]({detail_url})\n"
+
+        msg = {"msgtype": "markdown", "markdown": {"content": content}}
+
+        try:
+            async with httpx.AsyncClient(timeout=10) as client:
+                resp = await client.post(webhook_url, json=msg)
+                data = resp.json()
+            if data.get("errcode") != 0:
+                logger.error(f"Webhook发送失败: {data}")
+                return False
+            logger.info(f"Webhook告警已发送: alarm={alarm_id}")
+            return True
+        except Exception as e:
+            logger.error(f"Webhook发送异常: {e}")
+            return False
+
 
 # 全局单例
 _wechat_service: Optional[WeChatService] = None