后端bug修复

backend/utils/redis_client.py

@@ -0,0 +1,140 @@
+# ===========================================
+# 班级操行分管理系统 - 后端服务
+# 
+# 开发者: Canglan
+# 联系方式: admin@sea-studio.top
+# 版权归属: Sea Network Technology Studio
+# 许可证: MIT License
+# 
+# 版权所有 © Sea Network Technology Studio
+# ===========================================
+
+import redis.asyncio as redis
+from typing import Optional, Any
+import json
+
+from config import settings
+from utils.logger import get_logger
+
+logger = get_logger(__name__)
+
+# Redis客户端实例
+_redis_client: Optional[redis.Redis] = None
+
+
+async def init_redis_pool() -> None:
+    """初始化Redis连接池"""
+    global _redis_client
+    try:
+        _redis_client = redis.from_url(
+            settings.REDIS_URL,
+            max_connections=settings.REDIS_MAX_CONNECTIONS,
+            decode_responses=True
+        )
+        # 测试连接
+        await _redis_client.ping()
+        logger.info("Redis连接池初始化成功")
+    except Exception as e:
+        logger.error(f"Redis连接池初始化失败: {e}")
+        raise
+
+
+async def close_redis_pool() -> None:
+    """关闭Redis连接池"""
+    global _redis_client
+    if _redis_client:
+        await _redis_client.close()
+        logger.info("Redis连接池已关闭")
+
+
+def get_redis() -> redis.Redis:
+    """获取Redis客户端"""
+    if _redis_client is None:
+        raise RuntimeError("Redis客户端未初始化")
+    return _redis_client
+
+
+class RedisClient:
+    """Redis操作封装类"""
+    
+    @staticmethod
+    async def set(key: str, value: Any, expire: int = None) -> bool:
+        """设置缓存"""
+        client = get_redis()
+        if isinstance(value, (dict, list)):
+            value = json.dumps(value, ensure_ascii=False)
+        else:
+            value = str(value)
+        
+        if expire:
+            return await client.setex(key, expire, value)
+        return await client.set(key, value)
+    
+    @staticmethod
+    async def get(key: str) -> Optional[str]:
+        """获取缓存"""
+        client = get_redis()
+        return await client.get(key)
+    
+    @staticmethod
+    async def get_json(key: str) -> Optional[Any]:
+        """获取JSON格式缓存"""
+        value = await RedisClient.get(key)
+        if value:
+            try:
+                return json.loads(value)
+            except json.JSONDecodeError:
+                return value
+        return None
+    
+    @staticmethod
+    async def delete(key: str) -> int:
+        """删除缓存"""
+        client = get_redis()
+        return await client.delete(key)
+    
+    @staticmethod
+    async def exists(key: str) -> bool:
+        """检查key是否存在"""
+        client = get_redis()
+        return await client.exists(key) > 0
+    
+    @staticmethod
+    async def expire(key: str, seconds: int) -> bool:
+        """设置过期时间"""
+        client = get_redis()
+        return await client.expire(key, seconds)
+    
+    @staticmethod
+    async def set_user_token(user_id: int, token: str, expire: int = None) -> bool:
+        """设置用户Token缓存"""
+        key = f"user_token:{user_id}"
+        expire = expire or settings.JWT_EXPIRE_MINUTES * 60
+        return await RedisClient.set(key, token, expire)
+    
+    @staticmethod
+    async def get_user_token(user_id: int) -> Optional[str]:
+        """获取用户Token"""
+        key = f"user_token:{user_id}"
+        return await RedisClient.get(key)
+    
+    @staticmethod
+    async def delete_user_token(user_id: int) -> int:
+        """删除用户Token"""
+        key = f"user_token:{user_id}"
+        return await RedisClient.delete(key)
+    
+    @staticmethod
+    async def set_login_attempts(username: str) -> int:
+        """记录登录失败次数"""
+        key = f"login_attempts:{username}"
+        attempts = await RedisClient.get(key)
+        attempts = int(attempts) + 1 if attempts else 1
+        await RedisClient.set(key, attempts, 900)  # 15分钟锁定
+        return attempts
+    
+    @staticmethod
+    async def clear_login_attempts(username: str) -> None:
+        """清除登录失败记录"""
+        key = f"login_attempts:{username}"
+        await RedisClient.delete(key)