first commit
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zj
335
network_manager.py
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335
network_manager.py
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import socket
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import threading
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import time
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import sys
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# import subprocess # <--- 移除 subprocess 模块导入
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import logging
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class NetworkManager:
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def __init__(self, log_callback, connection_status_callback, ip_status_callback, tcp_status_callback, app_logger):
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self.log_callback = log_callback
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self.connection_status_callback = connection_status_callback
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self.ip_status_callback = ip_status_callback
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self.tcp_status_callback = tcp_status_callback
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self.app_logger = app_logger # 保存 app_logger 实例
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self.sockets = {} # Dictionary to hold persistent sockets if keep_alive is true
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self.socket_lock = threading.Lock() # Lock for managing self.sockets
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def _prepare_command_data(self, command):
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# Placeholder for actual command data preparation
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if command["type"] == "hex":
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return bytes.fromhex(command["data"].replace(" ", ""))
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else: # Default to text
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return command["data"].encode('utf-8')
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def _log_with_prefix(self, message, color, is_scheduled_task):
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prefix = "[调度任务] " if is_scheduled_task else ""
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full_message = prefix + message
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# 调用 UI 的 log_callback
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self.log_callback(full_message, color)
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# 根据颜色将消息发送到 app_logger 的对应级别
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if color == "red":
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self.app_logger.error(full_message)
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elif color == "orange":
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self.app_logger.warning(full_message)
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elif color == "blue" or color == "green":
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self.app_logger.info(full_message)
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elif color == "gray":
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self.app_logger.debug(full_message) # 'gray' 通常用于更详细的内部信息，映射到 DEBUG
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else:
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self.app_logger.info(full_message) # 默认使用 INFO
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def _connect_tcp_and_send(self, device, command, is_scheduled_task=False):
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# This method handles connection, sending, and receiving for TCP
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# It's called by send_command_async and send_command_sync_for_scheduler
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sock = None
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response_data = b""
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device_id = device["id"]
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self.app_logger.debug(f"[NetworkManager] _connect_tcp_and_send called for device '{device['name']}', scheduled: {is_scheduled_task}")
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try:
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# Check for existing persistent connection if keep_alive is true
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if device.get("keep_alive"):
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with self.socket_lock:
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sock = self.sockets.get(device_id)
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if sock:
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# Try to use existing socket, check if it's still open
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try:
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sock.send(b'') # Send a dummy byte to check connection
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self.app_logger.debug(f"[NetworkManager] Using existing keep-alive socket for '{device['name']}'.")
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except (socket.error, BrokenPipeError):
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self._log_with_prefix(f"设备 '{device['name']}' ({device['address']}:{device['port']}) 的保持连接已断开，重新连接。", "orange", is_scheduled_task)
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self.app_logger.debug(f"[NetworkManager] Keep-alive for '{device['name']}' broken, re-establishing.")
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sock.close()
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sock = None
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if not sock:
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sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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sock.settimeout(device.get("timeout", 5))
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sock.connect((device["address"], device["port"]))
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self._log_with_prefix(f"成功建立与设备 '{device['name']}' ({device['address']}:{device['port']}) 的保持连接。", "green", is_scheduled_task)
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self.app_logger.debug(f"[NetworkManager] Established new keep-alive socket for '{device['name']}'.")
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self.sockets[device_id] = sock
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else:
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# Non-persistent connection: create new socket
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sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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sock.settimeout(device.get("timeout", 5))
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sock.connect((device["address"], device["port"]))
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self._log_with_prefix(f"成功连接到设备 '{device['name']}' ({device['address']}:{device['port']})。", "green", is_scheduled_task)
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self.app_logger.debug(f"[NetworkManager] Established non-persistent connection for '{device['name']}'.")
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data_to_send = self._prepare_command_data(command)
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sock.sendall(data_to_send)
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self._log_with_prefix(f"发送到设备 '{device['name']}' ({device['address']}:{device['port']}) 指令 '{command['name']}': {data_to_send!r}", "gray", is_scheduled_task)
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self.app_logger.debug(f"[NetworkManager] Sent data to '{device['name']}': {data_to_send!r}")
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# Receive response
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response_data = sock.recv(1024)
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response_str = response_data.decode('utf-8', errors='ignore').strip()
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self._log_with_prefix(f"从设备 '{device['name']}' ({device['address']}:{device['port']}) 收到响应: {response_str!r}", "gray", is_scheduled_task)
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self.app_logger.debug(f"[NetworkManager] Received response from '{device['name']}': {response_str!r}")
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return response_str
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except socket.timeout:
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error_msg = f"与设备 '{device['name']}' ({device['address']}:{device['port']}) 通信超时。"
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self._log_with_prefix(error_msg, "red", is_scheduled_task)
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self.app_logger.error(f"[NetworkManager] {error_msg}")
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raise ConnectionError(error_msg)
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except (socket.error, ConnectionRefusedError, OSError) as e:
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error_msg = f"与设备 '{device['name']}' ({device['address']}:{device['port']}) 连接或通信失败: {e}"
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self_log_with_prefix(error_msg, "red", is_scheduled_task)
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self.app_logger.error(f"[NetworkManager] {error_msg}")
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raise ConnectionError(error_msg)
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except Exception as e:
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error_msg = f"发送指令 '{command['name']}' 到设备 '{device['name']}' 时发生未知错误: {e}"
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self._log_with_prefix(error_msg, "red", is_scheduled_task)
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self.app_logger.error(f"[NetworkManager] {error_msg}")
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raise RuntimeError(error_msg)
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finally:
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if sock and not device.get("keep_alive"):
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sock.close()
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self._log_with_prefix(f"已关闭与设备 '{device['name']}' ({device['address']}:{device['port']}) 的非保持连接。", "gray", is_scheduled_task)
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self.app_logger.debug(f"[NetworkManager] Closed non-persistent connection for '{device['name']}'.")
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def send_command_async(self, device_index, device, command, on_finish_callback=None):
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def _send_task():
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self.app_logger.debug(f"[NetworkManager] send_command_async: _send_task started for '{device['name']}'.")
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try:
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if device["protocol"] == "TCP":
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self._connect_tcp_and_send(device, command, is_scheduled_task=False) # Not a scheduled task
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elif device["protocol"] == "UDP":
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# UDP send logic (simplified, assuming no response needed for async)
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# For UDP, you'd typically create a socket, sendto, and then close it.
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# No explicit 'connection' is made.
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try:
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udp_sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
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data_to_send = self._prepare_command_data(command)
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udp_sock.sendto(data_to_send, (device["address"], device["port"]))
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self._log_with_prefix(f"UDP指令 '{command['name']}' 已发送到设备 '{device['name']}' ({device['address']}:{device['port']})。", "green", False)
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self.app_logger.debug(f"[NetworkManager] UDP command '{command['name']}' sent to '{device['name']}' (async).")
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except Exception as e:
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self._log_with_prefix(f"UDP指令 '{command['name']}' 发送失败到设备 '{device['name']}': {e}", "red", False)
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self.app_logger.error(f"[NetworkManager] UDP command '{command['name']}' send failed to '{device['name']}': {e}")
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finally:
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if udp_sock:
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udp_sock.close()
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else:
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self._log_with_prefix(f"不支持的协议 '{device['protocol']}'。", "red", False)
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self.app_logger.error(f"[NetworkManager] Unsupported protocol '{device['protocol']}' (async).")
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except Exception as e:
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# Errors are already logged by _connect_tcp_and_send or specific UDP logic
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self.app_logger.error(f"[NetworkManager] send_command_async error for '{device['name']}': {e}")
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finally:
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if on_finish_callback:
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on_finish_callback()
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self.app_logger.debug(f"[NetworkManager] send_command_async: _send_task finished for '{device['name']}'.")
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threading.Thread(target=_send_task).start()
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def send_command_sync_for_scheduler(self, device, command, is_scheduled_task=True):
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"""
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为调度器同步发送指令，并返回响应。
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此方法在后台线程中被调用。
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"""
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self.app_logger.debug(f"[NetworkManager] send_command_sync_for_scheduler called for '{device['name']}', command '{command['name']}'.")
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if device["protocol"] == "TCP":
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return self._connect_tcp_and_send(device, command, is_scheduled_task=is_scheduled_task)
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elif device["protocol"] == "UDP":
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# UDP logic for scheduler (simplified)
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try:
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udp_sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
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data_to_send = self._prepare_command_data(command)
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udp_sock.sendto(data_to_send, (device["address"], device["port"]))
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self._log_with_prefix(f"UDP指令 '{command['name']}' 已发送到设备 '{device['name']}' ({device['address']}:{device['port']})。", "green", is_scheduled_task)
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self.app_logger.debug(f"[NetworkManager] UDP command '{command['name']}' sent to '{device['name']}' (scheduled).")
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return "UDP command sent (no response expected)" # UDP typically doesn't have a direct response
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except Exception as e:
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self._log_with_prefix(f"UDP指令 '{command['name']}' 发送失败到设备 '{device['name']}': {e}", "red", is_scheduled_task)
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self.app_logger.error(f"[NetworkManager] UDP command '{command['name']}' send failed to '{device['name']}': {e}")
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raise RuntimeError(f"UDP command send failed: {e}")
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finally:
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if udp_sock:
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udp_sock.close()
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else:
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self._log_with_prefix(f"不支持的协议 '{device['protocol']}'。", "red", is_scheduled_task)
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self.app_logger.error(f"[NetworkManager] Unsupported protocol '{device['protocol']}' (scheduled).")
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raise ValueError(f"不支持的协议: {device['protocol']}")
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def check_ip_reachability_async(self, device_index, device):
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"""
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使用 socket 尝试 TCP 连接来检查 IP 可达性。
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此方法在后台线程中运行。
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"""
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def _check():
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is_reachable = False
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sock = None
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target_address = device["address"]
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target_port = device["port"] # 使用设备配置的端口进行检查
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self.app_logger.debug(f"[NetworkManager] Starting IP reachability check for '{device['name']}' ({target_address}:{target_port}).")
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try:
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sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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sock.settimeout(1) # 设置一个短的超时时间，例如1秒
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# connect_ex() 方法尝试连接，如果成功返回0，否则返回错误码
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result_code = sock.connect_ex((target_address, target_port))
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if result_code == 0:
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is_reachable = True
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self.app_logger.debug(f"[NetworkManager] IP reachable: TCP connect successful for '{device['name']}' ({target_address}:{target_port}).")
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else:
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self.app_logger.debug(f"[NetworkManager] IP not reachable: TCP connect failed for '{device['name']}' ({target_address}:{target_port}) with error code {result_code}.")
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except socket.timeout:
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self.app_logger.debug(f"[NetworkManager] IP not reachable: TCP connect timeout for '{device['name']}' ({target_address}:{target_port}).")
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except socket.error as e:
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self.app_logger.debug(f"[NetworkManager] IP not reachable: TCP connect error for '{device['name']}' ({target_address}:{target_port}): {e}")
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except Exception as e:
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self.app_logger.error(f"[NetworkManager] Unexpected error during TCP reachability check for '{device['name']}': {e}")
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finally:
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if sock:
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sock.close() # 确保关闭套接字
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self.ip_status_callback(device_index, is_reachable)
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self.app_logger.debug(f"[NetworkManager] IP reachability check for '{device['name']}' ({device['address']}:{device['port']}) finished. Status: {'Reachable' if is_reachable else 'Unreachable'}")
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threading.Thread(target=_check).start()
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def check_tcp_connection_async(self, device_index, device):
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"""
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检查 TCP 保持连接的状态。
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如果设备是 keep_alive，且 socket 存在，尝试发送空数据。
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如果 socket 不存在，则尝试建立新的 keep_alive 连接。
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此方法在后台线程中运行。
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"""
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def _check():
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is_connected = False
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sock_to_close = None # 用于临时创建的 socket
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device_id = device["id"]
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self.app_logger.debug(f"[NetworkManager] Starting TCP connection check for '{device['name']}' (keep_alive: {device.get('keep_alive')}).")
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try:
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if device.get("keep_alive"):
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with self.socket_lock:
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sock = self.sockets.get(device_id)
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if sock:
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try:
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sock.send(b'') # Try sending dummy data to check connection
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is_connected = True
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self.app_logger.debug(f"[NetworkManager] TCP check: Keep-alive socket for '{device['name']}' is active.")
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except (socket.error, BrokenPipeError):
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self.app_logger.debug(f"[NetworkManager] TCP check: Keep-alive socket for '{device['name']}' broken, closing and removing.")
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sock.close()
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del self.sockets[device_id]
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is_connected = False
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else:
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# No persistent socket yet, try to establish one to check
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self.app_logger.debug(f"[NetworkManager] TCP check: No existing keep-alive for '{device['name']}', trying to establish new one.")
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new_sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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new_sock.settimeout(device.get("timeout", 5))
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new_sock.connect((device["address"], device["port"]))
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self.sockets[device_id] = new_sock # Store it for future use
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is_connected = True
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self.app_logger.debug(f"[NetworkManager] TCP check: New keep-alive socket established for '{device['name']}'.")
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sock_to_close = None # Don't close, it's now persistent
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else:
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# 如果 keep_alive 是 False，我们不在此处进行 TCP 连接检查，因为它是非保持连接。
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# IP 可达性检查（通过 TCP 连接尝试）已经足够。
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self.app_logger.debug(f"[NetworkManager] TCP check: Device '{device['name']}' is not keep-alive, skipping detailed TCP connection check.")
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is_connected = False # 明确设置为 False，因为没有保持连接
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sock_to_close = None
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except Exception as e:
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self.app_logger.error(f"[NetworkManager] TCP connection check error for '{device['name']}': {e}")
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is_connected = False
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finally:
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if sock_to_close: # 如果是临时创建的 socket 且未被存储为 persistent
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sock_to_close.close()
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self.tcp_status_callback(device_index, is_connected)
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# 同时更新 IP 状态点，因为 TCP 连接成功必然意味着 IP 可达
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self.ip_status_callback(device_index, is_connected) # <--- 新增：根据 TCP 状态更新 IP 状态点
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threading.Thread(target=_check).start()
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def check_udp_reachability_async(self, device_index, device):
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"""
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尝试发送一个UDP数据包来检查UDP端口的可达性。
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注意：这只能确认数据包是否能发送出去，不能确认远程服务是否在监听。
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"""
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def _check():
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is_reachable = False
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sock = None
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target_address = device["address"]
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target_port = device["port"]
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self.app_logger.debug(f"[NetworkManager] Starting UDP reachability check for '{device['name']}' ({target_address}:{target_port}).")
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try:
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sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
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sock.settimeout(1) # 短暂超时
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# 尝试发送一个空数据包或一个小的"心跳"数据包
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sock.sendto(b'', (target_address, target_port))
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is_reachable = True # 如果sendto没有抛出异常，我们认为IP可达
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self.app_logger.debug(f"[NetworkManager] UDP send successful for '{device['name']}' ({target_address}:{target_port}).")
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except socket.timeout:
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self.app_logger.debug(f"[NetworkManager] UDP send timeout for '{device['name']}' ({target_address}:{target_port}).")
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except socket.error as e:
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# 常见的错误可能是"Network is unreachable"或"Host is down"
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self.app_logger.debug(f"[NetworkManager] UDP send failed for '{device['name']}' ({target_address}:{target_port}): {e}")
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except Exception as e:
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self.app_logger.error(f"[NetworkManager] Unexpected error during UDP reachability check for '{device['name']}': {e}")
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finally:
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if sock:
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sock.close()
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self.ip_status_callback(device_index, is_reachable)
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self.app_logger.debug(f"[NetworkManager] UDP reachability check for '{device['name']}' ({device['address']}:{device['port']}) finished. Status: {'Reachable' if is_reachable else 'Unreachable'}")
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threading.Thread(target=_check).start()
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def close_connection_for_device(self, device):
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"""关闭指定设备的保持连接"""
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device_id = device["id"]
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with self.socket_lock:
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if device_id in self.sockets:
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try:
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self.sockets[device_id].close()
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self.log_callback(f"已关闭设备 {device_id} 的保持连接。", "gray")
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self.app_logger.debug(f"[NetworkManager] Closed keep-alive socket for device {device_id}.")
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except Exception as e:
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self.log_callback(f"关闭设备 {device_id} 的保持连接时出错: {e}", "red")
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self.app_logger.error(f"[NetworkManager] Error closing keep-alive socket for device {device_id}: {e}")
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finally:
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del self.sockets[device_id]
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def close_all_sockets(self):
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with self.socket_lock:
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for device_id, sock in self.sockets.items():
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try:
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sock.close()
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self.log_callback(f"已关闭设备 {device_id} 的保持连接。", "gray")
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self.app_logger.debug(f"[NetworkManager] Closed keep-alive socket for device {device_id}.")
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except Exception as e:
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self.log_callback(f"关闭设备 {device_id} 的保持连接时出错: {e}", "red")
|
||||
self.app_logger.error(f"[NetworkManager] Error closing keep-alive socket for device {device_id}: {e}")
|
||||
self.sockets.clear()
|
||||
|
||||
Reference in New Issue
Block a user