mirror of
https://github.com/xinnan-tech/xiaozhi-esp32-server.git
synced 2026-07-29 04:53:55 +08:00
refactor: 重构底层代码，抽离conn，调整消息处理器并创建传输层接口。
feature: 支持mqtt非桥接版本。
This commit is contained in:
caixypromise
@@ -0,0 +1,279 @@
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import asyncio
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import json
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import time
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import uuid
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from typing import Dict, Any, Optional, Callable
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from config.logger import setup_logging
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logger = setup_logging()
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class MQTTConnection:
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"""
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MQTT连接处理类：管理单个MQTT客户端连接
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处理MQTT协议消息和会话管理
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"""
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def __init__(self, socket, connection_id: int, mqtt_server):
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self.socket = socket
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self.connection_id = connection_id
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self.mqtt_server = mqtt_server
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# 连接信息
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self.client_id = None
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self.device_id = None
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self.username = None
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self.password = None
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self.session_id = None
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# 协议状态
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self.is_connected_flag = False
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self.keep_alive_interval = 0
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self.last_activity = time.time()
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# 消息处理
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self.message_callback = None
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self.reply_topic = None
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# UDP相关
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self.udp_config = None
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# 任务管理
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self.keep_alive_task = None
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self._closed = False
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# 创建MQTT协议处理器
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from core.protocols.mqtt_protocol import MQTTProtocol
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self.protocol = MQTTProtocol(socket)
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self._setup_protocol_handlers()
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def _setup_protocol_handlers(self):
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"""设置协议事件处理"""
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self.protocol.on('connect', self._handle_connect)
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self.protocol.on('publish', self._handle_publish)
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self.protocol.on('subscribe', self._handle_subscribe)
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self.protocol.on('disconnect', self._handle_disconnect)
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self.protocol.on('close', self._handle_close)
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self.protocol.on('error', self._handle_error)
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async def _handle_connect(self, connect_data: Dict[str, Any]):
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"""处理CONNECT消息"""
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try:
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self.client_id = connect_data['clientId']
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self.username = connect_data.get('username')
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self.password = connect_data.get('password')
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self.keep_alive_interval = connect_data.get('keepAlive', 0) * 1000 # 转换为毫秒
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logger.info(f"MQTT客户端连接: {self.client_id}")
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# 解析客户端ID获取设备信息
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if not self._parse_client_id():
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await self.protocol.send_connack(1) # 连接被拒绝
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await self.close()
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return
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# 生成会话ID
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self.session_id = str(uuid.uuid4())
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# 设置回复主题
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self.reply_topic = f"devices/p2p/{self.device_id.replace(':', '_')}"
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# 发送连接确认
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await self.protocol.send_connack(0) # 连接接受
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self.is_connected_flag = True
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# 启动心跳检查
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if self.keep_alive_interval > 0:
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self.keep_alive_task = asyncio.create_task(self._keep_alive_check())
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# 通知服务器新连接
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await self.mqtt_server.on_client_connected(self)
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except Exception as e:
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logger.error(f"处理CONNECT消息失败: {e}")
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await self.close()
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def _parse_client_id(self) -> bool:
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"""解析客户端ID获取设备信息"""
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try:
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# 支持格式: GID_test@@@mac_address@@@uuid 或 GID_test@@@mac_address
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parts = self.client_id.split('@@@')
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if len(parts) >= 2:
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self.group_id = parts[0]
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# 将下划线替换为冒号格式的MAC地址
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self.device_id = parts[1].replace('_', ':')
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if len(parts) >= 3:
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self.uuid = parts[2]
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return True
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else:
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logger.error(f"无效的客户端ID格式: {self.client_id}")
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return False
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except Exception as e:
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logger.error(f"解析客户端ID失败: {e}")
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return False
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async def _handle_publish(self, publish_data: Dict[str, Any]):
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"""处理PUBLISH消息"""
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try:
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topic = publish_data['topic']
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payload = publish_data['payload']
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logger.debug(f"收到MQTT发布消息: topic={topic}, payload={payload}")
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# 更新活动时间
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self.last_activity = time.time()
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# 解析JSON消息
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try:
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message_data = json.loads(payload)
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# 处理不同类型的消息
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if message_data.get('type') == 'hello':
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await self._handle_hello_message(message_data)
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else:
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# 其他消息通过回调处理
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if self.message_callback:
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self.message_callback(topic, payload)
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except json.JSONDecodeError:
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logger.error(f"MQTT消息JSON解析失败: {payload}")
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except Exception as e:
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logger.error(f"处理PUBLISH消息失败: {e}")
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async def _handle_hello_message(self, message_data: Dict[str, Any]):
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"""处理hello消息，初始化UDP配置"""
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try:
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# 生成UDP加密配置
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import os
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self.udp_config = {
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'key': os.urandom(16),
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'encryption': 'aes-128-ctr',
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'server': self.mqtt_server.public_ip,
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'port': self.mqtt_server.udp_port
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}
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# 构造hello回复
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hello_reply = {
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'type': 'hello',
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'version': message_data.get('version', 3),
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'session_id': self.session_id,
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'transport': 'udp',
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'udp': {
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'server': self.udp_config['server'],
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'port': self.udp_config['port'],
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'encryption': self.udp_config['encryption'],
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'key': self.udp_config['key'].hex(),
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'nonce': '00' * 16 # 临时nonce
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},
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'audio_params': message_data.get('audio_params', {})
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}
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# 发送回复
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await self.send_message(self.reply_topic, json.dumps(hello_reply))
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logger.info(f"MQTT Hello消息处理完成: {self.client_id}")
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except Exception as e:
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logger.error(f"处理hello消息失败: {e}")
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async def _handle_subscribe(self, subscribe_data: Dict[str, Any]):
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"""处理SUBSCRIBE消息"""
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try:
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topic = subscribe_data['topic']
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packet_id = subscribe_data['packetId']
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logger.debug(f"客户端订阅主题: {topic}")
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# 发送订阅确认
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await self.protocol.send_suback(packet_id, 0)
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except Exception as e:
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logger.error(f"处理SUBSCRIBE消息失败: {e}")
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async def _handle_disconnect(self):
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"""处理DISCONNECT消息"""
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logger.info(f"客户端主动断开连接: {self.client_id}")
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await self.close()
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async def _handle_close(self):
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"""处理连接关闭"""
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logger.info(f"MQTT连接关闭: {self.client_id}")
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await self.close()
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async def _handle_error(self, error):
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"""处理连接错误"""
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logger.error(f"MQTT连接错误: {self.client_id}, error: {error}")
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await self.close()
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async def _keep_alive_check(self):
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"""心跳检查任务"""
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try:
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while self.is_connected_flag and not self._closed:
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await asyncio.sleep(self.keep_alive_interval / 1000 / 2) # 检查间隔为心跳间隔的一半
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current_time = time.time()
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if current_time - self.last_activity > self.keep_alive_interval / 1000 * 1.5:
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logger.info(f"MQTT客户端心跳超时: {self.client_id}")
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await self.close()
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break
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except asyncio.CancelledError:
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pass
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except Exception as e:
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logger.error(f"心跳检查任务出错: {e}")
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def set_message_callback(self, callback: Callable[[str, str], None]):
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"""设置消息接收回调"""
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self.message_callback = callback
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async def send_message(self, topic: str, payload: str):
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"""发送MQTT消息"""
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if self._closed or not self.is_connected_flag:
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return
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try:
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await self.protocol.send_publish(topic, payload, qos=0)
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logger.debug(f"发送MQTT消息: topic={topic}, payload={payload}")
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except Exception as e:
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logger.error(f"发送MQTT消息失败: {e}")
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def is_connected(self) -> bool:
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"""检查连接状态"""
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return self.is_connected_flag and not self._closed
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async def close(self):
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"""关闭连接"""
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if self._closed:
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return
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self._closed = True
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self.is_connected_flag = False
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# 取消心跳检查任务
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if self.keep_alive_task and not self.keep_alive_task.done():
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self.keep_alive_task.cancel()
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try:
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await self.keep_alive_task
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except asyncio.CancelledError:
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pass
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# 通知服务器连接关闭
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try:
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await self.mqtt_server.on_client_disconnected(self)
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except Exception as e:
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logger.error(f"通知服务器连接关闭失败: {e}")
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# 关闭协议处理器
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try:
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await self.protocol.close()
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except Exception as e:
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logger.error(f"关闭MQTT协议处理器失败: {e}")
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logger.info(f"MQTT连接已关闭: {self.client_id}")
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@@ -0,0 +1,432 @@
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import asyncio
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from typing import Dict, Any, Callable
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from config.logger import setup_logging
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logger = setup_logging()
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# MQTT 固定头部的类型
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class PacketType:
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CONNECT = 1
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CONNACK = 2
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PUBLISH = 3
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SUBSCRIBE = 8
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SUBACK = 9
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PINGREQ = 12
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PINGRESP = 13
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DISCONNECT = 14
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class MQTTProtocol:
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"""
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MQTT协议处理器：负责MQTT协议的解析和封装
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"""
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def __init__(self, socket):
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self.socket = socket
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self.buffer = b''
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self.event_handlers = {}
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self.is_connected = False
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self.keep_alive_interval = 0
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self.last_activity = 0
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# 启动消息处理任务
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self._processing_task = asyncio.create_task(self._process_messages())
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def on(self, event: str, handler: Callable):
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"""注册事件处理器"""
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self.event_handlers[event] = handler
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def emit(self, event: str, *args, **kwargs):
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"""触发事件"""
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handler = self.event_handlers.get(event)
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if handler:
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if asyncio.iscoroutinefunction(handler):
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asyncio.create_task(handler(*args, **kwargs))
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else:
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handler(*args, **kwargs)
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async def _process_messages(self):
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"""处理消息的主循环"""
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try:
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while True:
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# 从socket读取数据
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data = await self._read_socket()
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if not data:
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break
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# 添加到缓冲区
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self.buffer += data
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# 处理缓冲区中的消息
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await self._process_buffer()
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except asyncio.CancelledError:
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pass
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except Exception as e:
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logger.error(f"MQTT消息处理循环出错: {e}")
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self.emit('error', e)
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finally:
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self.emit('close')
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async def _read_socket(self) -> bytes:
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"""从socket读取数据"""
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try:
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# 使用asyncio的socket读取
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loop = asyncio.get_event_loop()
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data = await loop.sock_recv(self.socket, 4096)
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return data
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except Exception as e:
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logger.error(f"读取socket数据失败: {e}")
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return b''
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async def _process_buffer(self):
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"""处理缓冲区中的消息"""
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while len(self.buffer) >= 2: # 至少需要2字节开始解析
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try:
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# 解析消息
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message_length, message = self._parse_message()
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if message_length == 0:
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break # 消息不完整，等待更多数据
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# 从缓冲区移除已处理的消息
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self.buffer = self.buffer[message_length:]
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# 处理消息
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await self._handle_message(message)
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except Exception as e:
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logger.error(f"处理MQTT消息失败: {e}")
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self.emit('protocolError', e)
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break
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def _parse_message(self) -> tuple[int, Dict[str, Any]]:
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"""解析MQTT消息"""
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if len(self.buffer) < 2:
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return 0, {}
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# 获取消息类型
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first_byte = self.buffer[0]
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packet_type = (first_byte >> 4)
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# 解析剩余长度
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remaining_length, bytes_read = self._decode_remaining_length()
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if remaining_length == -1:
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return 0, {} # 长度解析失败，等待更多数据
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# 计算完整消息长度
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total_length = 1 + bytes_read + remaining_length
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if len(self.buffer) < total_length:
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return 0, {} # 消息不完整
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# 提取消息数据
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message_data = self.buffer[:total_length]
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# 根据消息类型解析
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if packet_type == PacketType.CONNECT:
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message = self._parse_connect(message_data)
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elif packet_type == PacketType.PUBLISH:
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message = self._parse_publish(message_data)
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elif packet_type == PacketType.SUBSCRIBE:
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message = self._parse_subscribe(message_data)
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elif packet_type == PacketType.PINGREQ:
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message = {'type': 'pingreq'}
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elif packet_type == PacketType.DISCONNECT:
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message = {'type': 'disconnect'}
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else:
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logger.warning(f"未处理的MQTT消息类型: {packet_type}")
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message = {'type': 'unknown', 'packet_type': packet_type}
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return total_length, message
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def _decode_remaining_length(self) -> tuple[int, int]:
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"""解码剩余长度字段"""
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multiplier = 1
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value = 0
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bytes_read = 0
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while bytes_read < 4 and bytes_read + 1 < len(self.buffer):
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digit = self.buffer[bytes_read + 1]
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bytes_read += 1
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value += (digit & 127) * multiplier
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multiplier *= 128
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if (digit & 128) == 0:
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break
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else:
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if bytes_read >= 4:
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return -1, 0 # 长度字段过长
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return -1, 0 # 数据不完整
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return value, bytes_read
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def _encode_remaining_length(self, length: int) -> bytes:
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"""编码剩余长度字段"""
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result = bytearray()
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while True:
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digit = length % 128
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length = length // 128
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if length > 0:
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digit |= 0x80
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result.append(digit)
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if length == 0:
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break
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return bytes(result)
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def _parse_connect(self, message_data: bytes) -> Dict[str, Any]:
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"""解析CONNECT消息"""
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try:
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# 跳过固定头部和剩余长度
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_, bytes_read = self._decode_remaining_length()
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pos = 1 + bytes_read
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# 协议名长度
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||||
protocol_length = int.from_bytes(message_data[pos:pos+2], 'big')
|
||||
pos += 2
|
||||
|
||||
# 协议名
|
||||
protocol = message_data[pos:pos+protocol_length].decode('utf-8')
|
||||
pos += protocol_length
|
||||
|
||||
# 协议级别
|
||||
protocol_level = message_data[pos]
|
||||
pos += 1
|
||||
|
||||
# 连接标志
|
||||
connect_flags = message_data[pos]
|
||||
has_username = (connect_flags & 0x80) != 0
|
||||
has_password = (connect_flags & 0x40) != 0
|
||||
pos += 1
|
||||
|
||||
# 保持连接时间
|
||||
keep_alive = int.from_bytes(message_data[pos:pos+2], 'big')
|
||||
pos += 2
|
||||
|
||||
# 客户端ID
|
||||
client_id_length = int.from_bytes(message_data[pos:pos+2], 'big')
|
||||
pos += 2
|
||||
client_id = message_data[pos:pos+client_id_length].decode('utf-8')
|
||||
pos += client_id_length
|
||||
|
||||
# 用户名（如果存在）
|
||||
username = ''
|
||||
if has_username:
|
||||
username_length = int.from_bytes(message_data[pos:pos+2], 'big')
|
||||
pos += 2
|
||||
username = message_data[pos:pos+username_length].decode('utf-8')
|
||||
pos += username_length
|
||||
|
||||
# 密码（如果存在）
|
||||
password = ''
|
||||
if has_password:
|
||||
password_length = int.from_bytes(message_data[pos:pos+2], 'big')
|
||||
pos += 2
|
||||
password = message_data[pos:pos+password_length].decode('utf-8')
|
||||
pos += password_length
|
||||
|
||||
return {
|
||||
'type': 'connect',
|
||||
'protocol': protocol,
|
||||
'protocolLevel': protocol_level,
|
||||
'clientId': client_id,
|
||||
'keepAlive': keep_alive,
|
||||
'username': username,
|
||||
'password': password
|
||||
}
|
||||
|
||||
except Exception as e:
|
||||
logger.error(f"解析CONNECT消息失败: {e}")
|
||||
raise
|
||||
|
||||
def _parse_publish(self, message_data: bytes) -> Dict[str, Any]:
|
||||
"""解析PUBLISH消息"""
|
||||
try:
|
||||
# 获取QoS等标志
|
||||
first_byte = message_data[0]
|
||||
qos = (first_byte & 0x06) >> 1
|
||||
dup = (first_byte & 0x08) != 0
|
||||
retain = (first_byte & 0x01) != 0
|
||||
|
||||
# 跳过固定头部和剩余长度
|
||||
_, bytes_read = self._decode_remaining_length()
|
||||
pos = 1 + bytes_read
|
||||
|
||||
# 主题长度
|
||||
topic_length = int.from_bytes(message_data[pos:pos+2], 'big')
|
||||
pos += 2
|
||||
|
||||
# 主题
|
||||
topic = message_data[pos:pos+topic_length].decode('utf-8')
|
||||
pos += topic_length
|
||||
|
||||
# 消息ID（QoS > 0时存在）
|
||||
packet_id = None
|
||||
if qos > 0:
|
||||
packet_id = int.from_bytes(message_data[pos:pos+2], 'big')
|
||||
pos += 2
|
||||
|
||||
# 有效载荷
|
||||
payload = message_data[pos:].decode('utf-8')
|
||||
|
||||
return {
|
||||
'type': 'publish',
|
||||
'topic': topic,
|
||||
'payload': payload,
|
||||
'qos': qos,
|
||||
'dup': dup,
|
||||
'retain': retain,
|
||||
'packetId': packet_id
|
||||
}
|
||||
|
||||
except Exception as e:
|
||||
logger.error(f"解析PUBLISH消息失败: {e}")
|
||||
raise
|
||||
|
||||
def _parse_subscribe(self, message_data: bytes) -> Dict[str, Any]:
|
||||
"""解析SUBSCRIBE消息"""
|
||||
try:
|
||||
# 跳过固定头部和剩余长度
|
||||
_, bytes_read = self._decode_remaining_length()
|
||||
pos = 1 + bytes_read
|
||||
|
||||
# 消息ID
|
||||
packet_id = int.from_bytes(message_data[pos:pos+2], 'big')
|
||||
pos += 2
|
||||
|
||||
# 主题长度
|
||||
topic_length = int.from_bytes(message_data[pos:pos+2], 'big')
|
||||
pos += 2
|
||||
|
||||
# 主题
|
||||
topic = message_data[pos:pos+topic_length].decode('utf-8')
|
||||
pos += topic_length
|
||||
|
||||
# QoS
|
||||
qos = message_data[pos]
|
||||
|
||||
return {
|
||||
'type': 'subscribe',
|
||||
'packetId': packet_id,
|
||||
'topic': topic,
|
||||
'qos': qos
|
||||
}
|
||||
|
||||
except Exception as e:
|
||||
logger.error(f"解析SUBSCRIBE消息失败: {e}")
|
||||
raise
|
||||
|
||||
async def _handle_message(self, message: Dict[str, Any]):
|
||||
"""处理解析后的消息"""
|
||||
message_type = message.get('type')
|
||||
|
||||
if message_type == 'connect':
|
||||
self.keep_alive_interval = message.get('keepAlive', 0)
|
||||
self.is_connected = True
|
||||
self.emit('connect', message)
|
||||
elif message_type == 'publish':
|
||||
self.emit('publish', message)
|
||||
elif message_type == 'subscribe':
|
||||
self.emit('subscribe', message)
|
||||
elif message_type == 'pingreq':
|
||||
await self.send_pingresp()
|
||||
elif message_type == 'disconnect':
|
||||
self.emit('disconnect')
|
||||
else:
|
||||
logger.warning(f"未处理的消息类型: {message_type}")
|
||||
|
||||
async def send_connack(self, return_code: int = 0, session_present: bool = False):
|
||||
"""发送CONNACK消息"""
|
||||
packet = bytearray([
|
||||
PacketType.CONNACK << 4, # 固定头部
|
||||
2, # 剩余长度
|
||||
1 if session_present else 0, # 连接确认标志
|
||||
return_code # 返回码
|
||||
])
|
||||
|
||||
await self._send_packet(packet)
|
||||
|
||||
async def send_publish(self, topic: str, payload: str, qos: int = 0,
|
||||
dup: bool = False, retain: bool = False, packet_id: int = None):
|
||||
"""发送PUBLISH消息"""
|
||||
# 构造固定头部
|
||||
first_byte = PacketType.PUBLISH << 4
|
||||
if dup:
|
||||
first_byte |= 0x08
|
||||
if qos > 0:
|
||||
first_byte |= (qos << 1)
|
||||
if retain:
|
||||
first_byte |= 0x01
|
||||
|
||||
# 构造可变头部和载荷
|
||||
topic_bytes = topic.encode('utf-8')
|
||||
payload_bytes = payload.encode('utf-8')
|
||||
|
||||
variable_header = bytearray()
|
||||
variable_header.extend(len(topic_bytes).to_bytes(2, 'big'))
|
||||
variable_header.extend(topic_bytes)
|
||||
|
||||
if qos > 0 and packet_id is not None:
|
||||
variable_header.extend(packet_id.to_bytes(2, 'big'))
|
||||
|
||||
# 计算剩余长度
|
||||
remaining_length = len(variable_header) + len(payload_bytes)
|
||||
remaining_length_bytes = self._encode_remaining_length(remaining_length)
|
||||
|
||||
# 构造完整消息
|
||||
packet = bytearray([first_byte])
|
||||
packet.extend(remaining_length_bytes)
|
||||
packet.extend(variable_header)
|
||||
packet.extend(payload_bytes)
|
||||
|
||||
await self._send_packet(packet)
|
||||
|
||||
async def send_suback(self, packet_id: int, return_code: int = 0):
|
||||
"""发送SUBACK消息"""
|
||||
packet = bytearray([
|
||||
PacketType.SUBACK << 4, # 固定头部
|
||||
3, # 剩余长度
|
||||
packet_id >> 8, # 消息ID高字节
|
||||
packet_id & 0xFF, # 消息ID低字节
|
||||
return_code # 返回码
|
||||
])
|
||||
|
||||
await self._send_packet(packet)
|
||||
|
||||
async def send_pingresp(self):
|
||||
"""发送PINGRESP消息"""
|
||||
packet = bytearray([
|
||||
PacketType.PINGRESP << 4, # 固定头部
|
||||
0 # 剩余长度
|
||||
])
|
||||
|
||||
await self._send_packet(packet)
|
||||
|
||||
async def _send_packet(self, packet: bytearray):
|
||||
"""发送数据包"""
|
||||
try:
|
||||
loop = asyncio.get_event_loop()
|
||||
await loop.sock_sendall(self.socket, bytes(packet))
|
||||
except Exception as e:
|
||||
logger.error(f"发送MQTT数据包失败: {e}")
|
||||
raise
|
||||
|
||||
async def close(self):
|
||||
"""关闭协议处理器"""
|
||||
if hasattr(self, '_processing_task') and not self._processing_task.done():
|
||||
self._processing_task.cancel()
|
||||
try:
|
||||
await self._processing_task
|
||||
except asyncio.CancelledError:
|
||||
pass
|
||||
|
||||
try:
|
||||
self.socket.close()
|
||||
except Exception as e:
|
||||
logger.error(f"关闭socket失败: {e}")
|
||||
Reference in New Issue
Block a user