Python 从autobahn WebSocketClientProtocol回调到另一个对象
首先,有一个Python 从autobahn WebSocketClientProtocol回调到另一个对象,python,python-3.x,python-asyncio,autobahn,Python,Python 3.x,Python Asyncio,Autobahn,首先,有一个IO类,它在\uuuuu init\uuuuu上被传递一个异步IO循环对象(IO=IO(loop)),该对象在主类的前面创建IOclass然后在某个点通过执行self.Socket=Socket(self)初始化Socket类,以便Socket对象具有向后访问权限。稍后,Socket类初始化Websocket类,它是Transport class Websocket(Transport): name = 'websocket' def __init__(self,
IO
类,它在\uuuuu init\uuuuu
上被传递一个异步IO循环对象(IO=IO(loop)
),该对象在主类的前面创建IO
class然后在某个点通过执行self.Socket=Socket(self)
初始化Socket
类,以便Socket对象具有向后访问权限。稍后,Socket
类初始化Websocket
类,它是Transport
class Websocket(Transport):
name = 'websocket'
def __init__(self, socket):
self.socket = socket
def open(self):
url = self.prepareUrl()
factory = WebSocketClientFactory(url, debug = False)
factory.protocol = Protocol
websocket = self.socket.loop.create_connection(factory, host=self.socket.io.options.host, port=self.socket.options.port)
self.socket.io.loop.run_until_complete(websocket)
def onOpen(self):
print('print me please!')
因此,套接字对象调用创建高速公路工厂的self.transport.open()
(其中self.transport=Websocket(self)
),通过执行self.socket.loop.create\u connection()
创建异步IO连接,然后通过执行run\u直到完成()
将coro未来添加到循环中
现在,问题就从这里开始:
autobahn工厂需要一个类,该类必须从autobahn.asyncio.websocket.WebSocketClientProtocol继承
我的类协议(WebSocketClientProtocol)
具有通常的:
class Protocol(WebSocketClientProtocol):
@asyncio.coroutine
def onOpen(self):
print('socket opened!')
这工作得非常好,打印('socketopened!')
会打印字符串,我的服务器也会说连接已打开
问题是:
在Protocol()类中,当autobahn调用onOpen()回调时,如何使此方法调用transport.onOpen()方法并执行
print('print me please!')
?确定,因此我修复了它!使用PyDispatch模块轻松完成
以下是我的解决方案:
import asyncio
from pydispatch import dispatcher
from autobahn.asyncio.websocket import WebSocketClientProtocol, WebSocketClientFactory
from ..transport import Transport
class Websocket(Transport):
name = 'websocket'
def __init__(self, socket):
self.socket = socket
def open(self):
url = self.prepareUrl()
factory = WebSocketClientFactory(url, debug = False)
factory.protocol = Protocol
websocket = self.socket.loop.create_connection(factory, host=self.socket.io.options.host, port=self.socket.options.port)
dispatcher.connect(self.onOpen, signal='open', sender=dispatcher.Anonymous)
self.socket.io.loop.run_until_complete(websocket)
def onOpen(self):
print('print me please!')
class Protocol(WebSocketClientProtocol):
@asyncio.coroutine
def onOpen(self):
dispatcher.send(signal='open')
更新
我有另一个更好的解决办法。这一个没有使用PyDispatch。由于异步IO任务完成时会有一个回调,返回用户定义的协议对象(从WebSocketClientProtocol继承),因此我们可以使用该回调将两个对象链接在一起:
import asyncio
from autobahn.asyncio.websocket import WebSocketClientProtocol, WebSocketClientFactory
from ..transport import Transport
class Protocol(WebSocketClientProtocol):
def __init__(self):
self.ws = None
super().__init__()
@asyncio.coroutine
def onConnect(self, response):
pass # connect handeled when SocketIO 'connect' packet is received
@asyncio.coroutine
def onOpen(self):
self.ws.onOpen()
@asyncio.coroutine
def onMessage(self, payload, isBinary):
self.ws.onMessage(payload=payload, isBinary=isBinary)
@asyncio.coroutine
def onClose(self, wasClean, code, reason):
if not wasClean:
self.ws.onError(code=code, reason=reason)
self.ws.onClose()
class Websocket(Transport):
name = 'websocket'
def __init__(self, socket, **kwargs):
super().__init__(socket)
loop = kwargs.pop('loop', None)
self.loop = loop or asyncio.get_event_loop()
self.transport = None
self.protocol = None
self.ready = True
def open(self):
url = self.prepareUrl()
if bool(self.socket.options.query):
url = '{0}?{1}'.format(url, self.socket.options.query)
factory = WebSocketClientFactory(url=url, headers=self.socket.options.headers)
factory.protocol = Protocol
coro = self.loop.create_connection(factory, host=self.socket.options.host, port=self.socket.options.port, ssl=self.socket.options.secure)
task = self.loop.create_task(coro)
task.add_done_callback(self.onWebSocketInit)
def onWebSocketInit(self, future):
try:
self.transport, self.protocol = future.result()
self.protocol.ws = self
except Exception:
self.onClose()
def send(self, data):
self.protocol.sendMessage(payload=data.encode('utf-8'), isBinary=False)
return self
def close(self):
if self.isOpen:
self.protocol.sendClose()
return self
def onOpen(self):
super().onOpen()
self.socket.setBuffer(False)
def onMessage(self, payload, isBinary):
if not isBinary:
self.onData(payload.decode('utf-8'))
else:
self.onError('Message arrived in binary')
def onClose(self):
super().onClose()
self.socket.setBuffer(True)
def onError(self, code, reason):
self.socket.onError(reason)
到目前为止,我找到的唯一解决方案是在循环对象中引用socket对象,这样,从
协议.onOpen()
协同程序中,我可以执行类似于self.factory.loop.socket.transport.onOpen()的操作。为了让事情变得更漂亮,我可以将loop对象作为基线传递,它的结构类似于loop.io.socket.transport
。但是,循环对象是否真的打算在其内部保存第三方引用?对我来说,这看起来有点太粗糙了…在cpp中,我使用了signals2来实现类似的目的,出于某种原因,我这次试图搜索python中的术语“signals”…当然没有找到任何相关的。。。现在,我正在调查PyDispatcher和其他人。如果在我找到一个足够好的解决方案之前没有人发帖,我会自己回答问题。我想我现在走对了方向。