Initial commit: ToNav Personal Navigation Page

- Flask + SQLite 个人导航页系统
- 前台导航页（分类Tab、卡片展示）
- 管理后台（服务管理、分类管理、健康检测）
- 响应式设计
- Systemd 服务配置

utils/health_check.py

@@ -0,0 +1,111 @@
+# -*- coding: utf-8 -*-
+"""健康检查工具"""
+
+import requests
+import sqlite3
+import threading
+import time
+from config import Config
+
+def check_service_health(service_id):
+    """检查单个服务健康状态"""
+    conn = sqlite3.connect(Config.DATABASE_PATH)
+    cursor = conn.cursor()
+
+    cursor.execute('''
+        SELECT name, url, health_check_url, health_check_enabled
+        FROM services
+        WHERE id = ?
+    ''', (service_id,))
+
+    service = cursor.fetchone()
+    if not service:
+        conn.close()
+        return
+
+    name, url, check_url, check_enabled = service
+    check_url = check_url or url  # 如果没有单独配置，使用主url
+
+    status = 'offline'
+    status_code = None
+    error = None
+
+    if check_enabled:
+        try:
+            response = requests.get(check_url, timeout=Config.HEALTH_CHECK_TIMEOUT)
+            status_code = response.status_code
+            if response.status_code < 500:
+                status = 'online'
+        except requests.exceptions.Timeout:
+            error = 'timeout'
+        except requests.exceptions.ConnectionError:
+            error = 'connection_error'
+        except Exception as e:
+            error = str(e)
+
+    # 这里可以添加状态记录表，暂时只检查
+    conn.close()
+
+    return {
+        'id': service_id,
+        'name': name,
+        'status': status,
+        'status_code': status_code,
+        'error': error
+    }
+
+def check_all_services():
+    """检查所有启用健康检测的服务"""
+    conn = sqlite3.connect(Config.DATABASE_PATH)
+    cursor = conn.cursor()
+
+    cursor.execute('''
+        SELECT id FROM services
+        WHERE is_enabled = 1 AND health_check_enabled = 1
+        ORDER BY sort_order DESC
+    ''')
+
+    services = cursor.fetchall()
+    conn.close()
+
+    results = []
+    for (service_id,) in services:
+        result = check_service_health(service_id)
+        if result:
+            results.append(result)
+
+    return results
+
+class HealthCheckWorker:
+    """后台健康检查工作线程"""
+
+    def __init__(self):
+        self.running = False
+        self.thread = None
+
+    def start(self):
+        """启动后台检查"""
+        if not self.running:
+            self.running = True
+            self.thread = threading.Thread(target=self._run, daemon=True)
+            self.thread.start()
+            print("健康检查线程已启动")
+
+    def stop(self):
+        """停止后台检查"""
+        self.running = False
+        if self.thread:
+            self.thread.join()
+            print("健康检查线程已停止")
+
+    def _run(self):
+        """检查循环"""
+        while self.running:
+            results = check_all_services()
+            # 记录日志
+            for result in results:
+                print(f"[HealthCheck] {result['name']}: {result['status']}")
+            time.sleep(Config.HEALTH_CHECK_INTERVAL)
+
+# 全局工作线程
+health_worker = HealthCheckWorker()