sockjs - 实现房间的例子

Question

我想让用户创建并加入一个“房间”，以便他们可以协作。

我正在查看SockJs Multiplexer server 并想知道我是否可以利用其中的一些来创建和广播到特定的频道/房间。

在示例中，channel is created manually 和 client connects to that channel。

将这些频道视为房间有用吗？

有没有办法动态创建这些通道，而不是在服务器上手动声明它们？

Answer 1

免责声明：在我写完答案之前，我没有注意到您指的是服务器的 Javascript 版本。因此，我的代码示例是使用基于Python的sockjs-tornado给出的，但我猜原理应该是一样的。

是的，您可以通过在每个SockJSConnection 派生类中保留一组引用连接来将通道视为房间。为此，您只需将每个连接类从

class AnnConnection(SockJSConnection):
    def on_open(self, info):
        self.send('Ann says hi!!')

    def on_message(self, message):
        self.broadcast(self.connected, 'Ann nods: ' + message)

到

class AnnConnection(SockJSConnection):
    connected = WeakSet()

    def on_open(self, info):
        self.connected.add(self)
        self.send('Ann says hi!!')

    def on_message(self, message):
        self.broadcast(self.connected, 'Ann nods: ' + message)

    def on_close(self):
        self.connected.remove(self)
        super(AnnConnection, self).on_close()

在server.py.

为了动态创建频道，我稍微更改了__main__ 代码和MultiplexConnection 类并添加了几个新类。在if __name__ == "__main__": 块中，

# Create multiplexer
router = MultiplexConnection.get(ann=AnnConnection, bob=BobConnection,
                                 carl=CarlConnection)

改为

# Create multiplexer
router = MultiplexConnection.get()

虽然

class MultiplexConnection(conn.SockJSConnection):
    channels = dict()
    # …

    def on_message(self, msg):
        # …
        if chan not in self.channels:
            return

在MultiplexConnection 中改为

class MultiplexConnection(conn.SockJSConnection):
    channels = dict()
    _channel_factory = ChannelFactory()
    # …

    def on_message(self, msg):
        # …
        if chan not in self.channels:
            self.channels[chan] = self._channel_factory(chan)

和类

class DynamicConnection(SockJSConnection):
    def on_open(self, info):
        self.connected.add(self)
        self.send('{0} says hi!!'.format(self.name))

    def on_message(self, message):
        self.broadcast(self.connected, '{0} nods: {1}'
            .format(self.name, message))

    def on_close(self):
        self.connected.remove(self)
        super(DynamicConnection, self).on_close()


class ChannelFactory(object):
    _channels = dict()

    def __call__(self, channel_name):
        if channel_name not in self._channels:
            class Channel(DynamicConnection):
                connected = WeakSet()
                name = channel_name

            self._channels[channel_name] = Channel

        return self._channels[channel_name]

已添加到multiplex.py。