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149 | @dataclass
class BaseConnClient:
model_config = {"arbitrary_types_allowed": True}
url: Optional[str] = "ws://127.0.0.1:8000"
is_connected: Optional[bool] = False
pending_requests: Dict[str, Tuple[asyncio.Future, Callable]] = field(default_factory=dict)
event_handlers: Dict[str, List[Callable]] = field(default_factory=dict)
websocket: websockets.connect = None
receive_task: Optional[asyncio.Task] = None
async def _handle_message(self, message: str):
"""处理接收到的消息"""
try:
data = json.loads(message)
except json.JSONDecodeError:
logger.error(f"unable parse message: {message}")
try:
message_type = data.get("type")
if message_type == "response":
res = ConnResponse(**data)
# 处理响应消息
request_id = res.request_id
if request_id in self.pending_requests:
future,callback = self.pending_requests.pop(request_id)
future.set_result(res)
if callback:
callback(res)
elif message_type == "event":
event = ConnEvent(**data)
await self._handle_event(event)
except Exception as e:
logger.error(f"error in handle message: {traceback.format_exc()}")
async def _handle_event(self, event: ConnEvent):
"""处理事件"""
if event.event_type in self.event_handlers:
tasks = []
for handler in self.event_handlers.get(event.event_type, []):
if inspect.iscoroutinefunction(handler):
t_handler = handler(event)
tasks.append(t_handler)
else:
t_handler = asyncio.to_thread(handler, event)
tasks.append(t_handler)
await asyncio.gather(*tasks)
else:
logger.info(f"no handler for event type : {event.event_type}")
async def _receive_messages(self):
while self.is_connected:
try:
message = await self.websocket.recv()
await self._handle_message(message)
except websockets.exceptions.ConnectionClosed:
logger.error("WebSocket connection closed")
self.is_connected = False
except Exception as e:
logger.error(f"error in receive or handle message: {e}")
async def connect(self)-> bool:
try:
self.websocket = await websockets.connect(self.url, close_timeout=1)
self.is_connected = True
logger.info("success connected to %s", self.url)
if self.receive_task is None or self.receive_task.done():
self.receive_task = asyncio.create_task(self._receive_messages())
return True
except Exception as e:
logger.error("failed to connect to %s: %s", self.url, e)
self.is_connected = False
return False
async def _send_request(self, request: ConnRequest, callback: Callable = None)->ConnResponse:
if not self.is_connected:
raise Exception("websocket not connected")
future = asyncio.Future()
self.pending_requests[request.request_id] = (future, callback)
try:
# 发送请求
await self.websocket.send(request.model_dump_json())
except Exception as e:
# 移除pending请求
if request.request_id in self.pending_requests:
self.pending_requests.pop(request.request_id)
raise e
else:
result = await future
return result
async def send_request(self, command: CommandType, payload:Optional[Any]=None, callback: Optional[Callable] = None)->ConnResponse:
"""发送请求并等待响应"""
request = ConnRequest(command=command, payload=payload)
return await self._send_request(request, callback)
async def close(self):
"""关闭WebSocket连接"""
if self.is_connected:
self.is_connected = False
if self.receive_task and not self.receive_task.done():
self.receive_task.cancel()
try:
await self.receive_task
except asyncio.CancelledError:
pass
if self.websocket:
try:
await self.websocket.close()
except Exception:
pass
logger.info("WebSocket closed.")
def on_event(self, event_type: str, handler: Optional[Callable] = None):
"""注册事件处理器，支持装饰器语法"""
# 如果提供了handler参数，直接注册
if handler is not None:
if event_type not in self.event_handlers:
self.event_handlers[event_type] = []
self.event_handlers[event_type].append(handler)
return handler
# 否则返回装饰器函数
def decorator(func: Callable) -> Callable:
if event_type not in self.event_handlers:
self.event_handlers[event_type] = []
self.event_handlers[event_type].append(func)
return func
return decorator
|