内容安全审核
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250
service/device_service.py
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250
service/device_service.py
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import threading
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import time
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from typing import Optional
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from mysql.connector import Error as MySQLError
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from ds.db import db
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from service.device_action_service import add_device_action
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_last_alarm_timestamps: dict[str, float] = {}
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_timestamp_lock = threading.Lock()
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# 获取所有去重的客户端IP列表
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def get_unique_client_ips() -> list[str]:
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"""获取所有去重的客户端IP列表"""
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conn = None
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cursor = None
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try:
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conn = db.get_connection()
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cursor = conn.cursor(dictionary=True)
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query = "SELECT DISTINCT client_ip FROM devices WHERE client_ip IS NOT NULL"
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cursor.execute(query)
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results = cursor.fetchall()
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return [item['client_ip'] for item in results]
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except MySQLError as e:
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raise Exception(f"获取客户端IP列表失败: {str(e)}") from e
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finally:
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db.close_connection(conn, cursor)
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# 通过客户端IP更新设备是否需要处理
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def update_is_need_handler_by_client_ip(client_ip: str, is_need_handler: int) -> bool:
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"""
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通过客户端IP更新设备的「是否需要处理」状态（is_need_handler字段）
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"""
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# 参数合法性校验
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if not client_ip:
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raise ValueError("客户端IP不能为空")
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# 校验is_need_handler取值（需与数据库字段类型匹配、通常为0/1 tinyint）
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if is_need_handler not in (0, 1):
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raise ValueError("是否需要处理（is_need_handler）必须是0（不需要）或1（需要）")
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conn = None
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cursor = None
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try:
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# 2. 获取数据库连接与游标
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conn = db.get_connection()
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cursor = conn.cursor(dictionary=True)
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# 3. 先校验设备是否存在（通过client_ip定位）
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cursor.execute(
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"SELECT id FROM devices WHERE client_ip = %s",
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(client_ip,)
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)
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device = cursor.fetchone()
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if not device:
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raise ValueError(f"客户端IP为 {client_ip} 的设备不存在、无法更新「是否需要处理」状态")
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# 4. 执行更新操作（同时更新时间戳、保持与其他更新逻辑一致性）
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update_query = """
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UPDATE devices
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SET is_need_handler = %s,
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updated_at = CURRENT_TIMESTAMP
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WHERE client_ip = %s
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"""
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cursor.execute(update_query, (is_need_handler, client_ip))
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# 5. 确认更新生效（判断影响行数、避免无意义更新）
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if cursor.rowcount <= 0:
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raise Exception(f"更新失败：客户端IP {client_ip} 的设备未发生状态变更（可能已为目标值）")
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# 6. 提交事务
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conn.commit()
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return True
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except MySQLError as e:
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# 数据库异常时回滚事务
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if conn:
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conn.rollback()
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raise Exception(f"数据库操作失败：更新设备「是否需要处理」状态时出错 - {str(e)}") from e
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finally:
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# 无论成功失败、都关闭数据库连接（避免连接泄漏）
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db.close_connection(conn, cursor)
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def increment_alarm_count_by_ip(client_ip: str) -> bool:
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"""
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通过客户端IP增加设备的报警次数，相同IP 200ms内重复调用会被忽略
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:param client_ip: 客户端IP地址
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:return: 操作是否成功（是否实际执行了数据库更新）
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"""
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if not client_ip:
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raise ValueError("客户端IP不能为空")
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current_time = time.time() # 获取当前时间戳（秒，含小数）
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with _timestamp_lock: # 确保线程安全的字典操作
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last_time: Optional[float] = _last_alarm_timestamps.get(client_ip)
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# 如果存在最近记录且间隔小于200ms，直接返回False（不执行更新）
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if last_time is not None and (current_time - last_time) < 0.2:
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return False
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# 更新当前IP的最近调用时间
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_last_alarm_timestamps[client_ip] = current_time
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# 2. 执行数据库更新操作（只有通过时间校验才会执行）
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conn = None
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cursor = None
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try:
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conn = db.get_connection()
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cursor = conn.cursor(dictionary=True)
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# 检查设备是否存在
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cursor.execute("SELECT id FROM devices WHERE client_ip = %s", (client_ip,))
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device = cursor.fetchone()
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if not device:
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raise ValueError(f"客户端IP为 {client_ip} 的设备不存在")
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# 报警次数加1、并更新时间戳
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update_query = """
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UPDATE devices
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SET alarm_count = alarm_count + 1,
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updated_at = CURRENT_TIMESTAMP
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WHERE client_ip = %s
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"""
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cursor.execute(update_query, (client_ip,))
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conn.commit()
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return True
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except MySQLError as e:
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if conn:
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conn.rollback()
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raise Exception(f"更新报警次数失败: {str(e)}") from e
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finally:
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db.close_connection(conn, cursor)
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# 通过客户端IP更新设备在线状态
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def update_online_status_by_ip(client_ip: str, online_status: int) -> bool:
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"""
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通过客户端IP更新设备的在线状态
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:param client_ip: 客户端IP地址
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:param online_status: 在线状态（1-在线、0-离线）
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:return: 操作是否成功
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"""
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if not client_ip:
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raise ValueError("客户端IP不能为空")
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if online_status not in (0, 1):
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raise ValueError("在线状态必须是0（离线）或1（在线）")
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conn = None
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cursor = None
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try:
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conn = db.get_connection()
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cursor = conn.cursor(dictionary=True)
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# 检查设备是否存在并获取设备ID
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cursor.execute("SELECT id, device_online_status FROM devices WHERE client_ip = %s", (client_ip,))
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device = cursor.fetchone()
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if not device:
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raise ValueError(f"客户端IP为 {client_ip} 的设备不存在")
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# 状态无变化则不操作
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if device['device_online_status'] == online_status:
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return True
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# 更新在线状态和时间戳
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update_query = """
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UPDATE devices
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SET device_online_status = %s,
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updated_at = CURRENT_TIMESTAMP
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WHERE client_ip = %s
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"""
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cursor.execute(update_query, (online_status, client_ip))
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# 记录状态变更历史
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add_device_action(client_ip, online_status)
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conn.commit()
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return True
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except MySQLError as e:
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if conn:
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conn.rollback()
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raise Exception(f"更新设备在线状态失败: {str(e)}") from e
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finally:
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db.close_connection(conn, cursor)
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# 通过客户端IP查询设备在数据库中存在
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def is_device_exist_by_ip(client_ip: str) -> bool:
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"""
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通过客户端IP查询设备在数据库中是否存在
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"""
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if not client_ip:
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raise ValueError("客户端IP不能为空")
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conn = None
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cursor = None
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try:
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conn = db.get_connection()
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cursor = conn.cursor(dictionary=True)
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# 查询设备是否存在
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cursor.execute(
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"SELECT id FROM devices WHERE client_ip = %s",
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(client_ip,)
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)
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device = cursor.fetchone()
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# 如果查询到结果则存在，否则不存在
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return bool(device)
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except MySQLError as e:
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raise Exception(f"查询设备是否存在失败: {str(e)}") from e
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finally:
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db.close_connection(conn, cursor)
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# 根据客户端IP获取是否需要处理
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def get_is_need_handler_by_ip(client_ip: str) -> int:
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"""
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通过客户端IP查询设备的is_need_handler状态
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:param client_ip: 客户端IP地址
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:return: 设备的is_need_handler状态（0-不需要处理，1-需要处理）
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"""
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if not client_ip:
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raise ValueError("客户端IP不能为空")
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conn = None
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cursor = None
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try:
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conn = db.get_connection()
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cursor = conn.cursor(dictionary=True)
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# 查询设备的is_need_handler状态
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cursor.execute(
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"SELECT is_need_handler FROM devices WHERE client_ip = %s",
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(client_ip,)
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)
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device = cursor.fetchone()
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if not device:
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raise ValueError(f"客户端IP为 {client_ip} 的设备不存在")
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return device['is_need_handler']
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except MySQLError as e:
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raise Exception(f"查询设备is_need_handler状态失败: {str(e)}") from e
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finally:
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db.close_connection(conn, cursor)
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