コード例 #1
0
ファイル: websocket.py プロジェクト: C4ptainCrunch/webalchemy
    def __init__(self, io_loop, request):
        self.connect_future = TracebackFuture()
        self.read_future = None
        self.read_queue = collections.deque()
        self.key = base64.b64encode(os.urandom(16))

        scheme, sep, rest = request.url.partition(':')
        scheme = {'ws': 'http', 'wss': 'https'}[scheme]
        request.url = scheme + sep + rest
        request.headers.update({
            'Upgrade': 'websocket',
            'Connection': 'Upgrade',
            'Sec-WebSocket-Key': self.key,
            'Sec-WebSocket-Version': '13',
        })

        self.resolver = Resolver(io_loop=io_loop)
        super(WebSocketClientConnection, self).__init__(
            io_loop, None, request, lambda: None, self._on_http_response,
            104857600, self.resolver)
コード例 #2
0
ファイル: websocket.py プロジェクト: C4ptainCrunch/webalchemy
class WebSocketClientConnection(simple_httpclient._HTTPConnection):
    """WebSocket client connection.

    This class should not be instantiated directly; use the
    `websocket_connect` function instead.
    """
    def __init__(self, io_loop, request):
        self.connect_future = TracebackFuture()
        self.read_future = None
        self.read_queue = collections.deque()
        self.key = base64.b64encode(os.urandom(16))

        scheme, sep, rest = request.url.partition(':')
        scheme = {'ws': 'http', 'wss': 'https'}[scheme]
        request.url = scheme + sep + rest
        request.headers.update({
            'Upgrade': 'websocket',
            'Connection': 'Upgrade',
            'Sec-WebSocket-Key': self.key,
            'Sec-WebSocket-Version': '13',
        })

        self.resolver = Resolver(io_loop=io_loop)
        super(WebSocketClientConnection, self).__init__(
            io_loop, None, request, lambda: None, self._on_http_response,
            104857600, self.resolver)

    def close(self):
        """Closes the websocket connection.

        .. versionadded:: 3.2
        """
        if self.protocol is not None:
            self.protocol.close()
            self.protocol = None

    def _on_close(self):
        self.on_message(None)
        self.resolver.close()
        super(WebSocketClientConnection, self)._on_close()

    def _on_http_response(self, response):
        if not self.connect_future.done():
            if response.error:
                self.connect_future.set_exception(response.error)
            else:
                self.connect_future.set_exception(WebSocketError(
                    "Non-websocket response"))

    def _handle_1xx(self, code):
        assert code == 101
        assert self.headers['Upgrade'].lower() == 'websocket'
        assert self.headers['Connection'].lower() == 'upgrade'
        accept = WebSocketProtocol13.compute_accept_value(self.key)
        assert self.headers['Sec-Websocket-Accept'] == accept

        self.protocol = WebSocketProtocol13(self, mask_outgoing=True)
        self.protocol._receive_frame()

        if self._timeout is not None:
            self.io_loop.remove_timeout(self._timeout)
            self._timeout = None

        self.connect_future.set_result(self)

    def write_message(self, message, binary=False):
        """Sends a message to the WebSocket server."""
        self.protocol.write_message(message, binary)

    def read_message(self, callback=None):
        """Reads a message from the WebSocket server.

        Returns a future whose result is the message, or None
        if the connection is closed.  If a callback argument
        is given it will be called with the future when it is
        ready.
        """
        assert self.read_future is None
        future = TracebackFuture()
        if self.read_queue:
            future.set_result(self.read_queue.popleft())
        else:
            self.read_future = future
        if callback is not None:
            self.io_loop.add_future(future, callback)
        return future

    def on_message(self, message):
        if self.read_future is not None:
            self.read_future.set_result(message)
            self.read_future = None
        else:
            self.read_queue.append(message)

    def on_pong(self, data):
        pass