Python asyncio.StreamReader方法代碼示例

# 需要導入模塊: import asyncio [as 別名]
# 或者: from asyncio import StreamReader [as 別名]
def handshake(
    remote: kademlia.Node, privkey: datatypes.PrivateKey, token: CancelToken
) -> Tuple[
    bytes, bytes, BasePreImage, BasePreImage, asyncio.StreamReader, asyncio.StreamWriter
]:  # noqa: E501
    """
    Perform the auth handshake with given remote.

    Returns the established secrets and the StreamReader/StreamWriter pair already connected to
    the remote.
    """
    use_eip8 = False
    initiator = HandshakeInitiator(remote, privkey, use_eip8, token)
    reader, writer = await initiator.connect()
    opened_connections[remote.__repr__()] = (reader, writer)
    aes_secret, mac_secret, egress_mac, ingress_mac = await _handshake(
        initiator, reader, writer, token
    )
    return aes_secret, mac_secret, egress_mac, ingress_mac, reader, writer 

# 需要導入模塊: import asyncio [as 別名]
# 或者: from asyncio import StreamReader [as 別名]
def __init__(
        self,
        app: ASGIFramework,
        loop: asyncio.AbstractEventLoop,
        config: Config,
        reader: asyncio.StreamReader,
        writer: asyncio.StreamWriter,
    ) -> None:
        self.app = app
        self.config = config
        self.loop = loop
        self.protocol: ProtocolWrapper
        self.reader = reader
        self.writer = writer
        self.send_lock = asyncio.Lock()
        self.timeout_lock = asyncio.Lock()

        self._keep_alive_timeout_handle: Optional[asyncio.Task] = None 

# 需要導入模塊: import asyncio [as 別名]
# 或者: from asyncio import StreamReader [as 別名]
def test_it_logs_messages(self):
        asyncio.set_event_loop_policy(uvloop.EventLoopPolicy())
        loop = asyncio.get_event_loop()

        async def test():
            reader = asyncio.StreamReader(loop=loop)
            protocol = asyncio.StreamReaderProtocol(reader)

            transport, _ = await loop.connect_read_pipe(
                lambda: protocol, self.read_pipe
            )

            logger = Logger.with_default_handlers()
            await logger.info("Xablau")

            logged_content = await reader.readline()
            self.assertEqual(logged_content, b"Xablau\n")

            transport.close()
            await logger.shutdown()

        loop.run_until_complete(test()) 

# 需要導入模塊: import asyncio [as 別名]
# 或者: from asyncio import StreamReader [as 別名]
def create_pipe_streams_pair():
    path = tempfile.mktemp()
    loop = asyncio.get_event_loop()
    server_side = asyncio.Future()

    def factory():

        def client_connected_cb(reader, writer):
            server_side.set_result((reader, writer))
        reader = asyncio.StreamReader(loop=loop)
        return asyncio.StreamReaderProtocol(reader, client_connected_cb, loop=loop)

    server = yield from loop.create_unix_server(factory, path)

    r1 = asyncio.StreamReader(loop=loop)
    protocol = asyncio.StreamReaderProtocol(r1, loop=loop)
    transport, _ = yield from loop.create_unix_connection(
        lambda: protocol, path)
    w1 = asyncio.StreamWriter(transport, protocol, r1, loop)

    r2, w2 = yield from server_side
    server.close()
    return (r1, w1), (r2, w2) 

# 需要導入模塊: import asyncio [as 別名]
# 或者: from asyncio import StreamReader [as 別名]
def test_readline(self):
        # Read one line. 'readline' will need to wait for the data
        # to come from 'cb'
        stream = asyncio.StreamReader(loop=self.loop)
        stream.feed_data(b'chunk1 ')
        read_task = asyncio.Task(stream.readline(), loop=self.loop)

        def cb():
            stream.feed_data(b'chunk2 ')
            stream.feed_data(b'chunk3 ')
            stream.feed_data(b'\n chunk4')
        self.loop.call_soon(cb)

        line = self.loop.run_until_complete(read_task)
        self.assertEqual(b'chunk1 chunk2 chunk3 \n', line)
        self.assertEqual(b' chunk4', stream._buffer) 

# 需要導入模塊: import asyncio [as 別名]
# 或者: from asyncio import StreamReader [as 別名]
def test_readexactly(self):
        # Read exact number of bytes.
        stream = asyncio.StreamReader(loop=self.loop)

        n = 2 * len(self.DATA)
        read_task = asyncio.Task(stream.readexactly(n), loop=self.loop)

        def cb():
            stream.feed_data(self.DATA)
            stream.feed_data(self.DATA)
            stream.feed_data(self.DATA)
        self.loop.call_soon(cb)

        data = self.loop.run_until_complete(read_task)
        self.assertEqual(self.DATA + self.DATA, data)
        self.assertEqual(self.DATA, stream._buffer) 

# 需要導入模塊: import asyncio [as 別名]
# 或者: from asyncio import StreamReader [as 別名]
def test_readexactly_eof(self):
        # Read exact number of bytes (eof).
        stream = asyncio.StreamReader(loop=self.loop)
        n = 2 * len(self.DATA)
        read_task = asyncio.Task(stream.readexactly(n), loop=self.loop)

        def cb():
            stream.feed_data(self.DATA)
            stream.feed_eof()
        self.loop.call_soon(cb)

        with self.assertRaises(asyncio.IncompleteReadError) as cm:
            self.loop.run_until_complete(read_task)
        self.assertEqual(cm.exception.partial, self.DATA)
        self.assertEqual(cm.exception.expected, n)
        self.assertEqual(str(cm.exception),
                         '18 bytes read on a total of 36 expected bytes')
        self.assertEqual(b'', stream._buffer) 

# 需要導入模塊: import asyncio [as 別名]
# 或者: from asyncio import StreamReader [as 別名]
def _wait_for_data(self, func_name):
    """Wait until feed_data() or feed_eof() is called.

    If stream was paused, automatically resume it.
    """
    # StreamReader uses a future to link the protocol feed_data() method
    # to a read coroutine. Running two read coroutines at the same time
    # would have an unexpected behaviour. It would not possible to know
    # which coroutine would get the next data.
    if self._waiter is not None:
        raise RuntimeError('%s() called while another coroutine is '
                           'already waiting for incoming data' % func_name)

    assert not self._eof, '_wait_for_data after EOF'

    # Waiting for data while paused will make deadlock, so prevent it.
    if self._paused:
        self._paused = False
        self._transport.resume_reading()

    self._waiter = asyncio.futures.Future(loop=self._loop)
    try:
        await self._waiter
    finally:
        self._waiter = None 

# 需要導入模塊: import asyncio [as 別名]
# 或者: from asyncio import StreamReader [as 別名]
def __call__(self, reader: asyncio.StreamReader, writer: asyncio.StreamWriter) -> None:
        """Main entry point for an interpreter session with a single client."""
        self.reader = reader
        self.writer = writer
        self.running = True

        if self.banner:
            writer.write(self.banner)
            await writer.drain()

        while self.running:
            try:
                await self.handle_one_command()
            except ConnectionResetError:
                writer.close()
                self.running = False
                break
            except Exception:
                log.exception("Exception in manhole REPL")
                self.writer.write(traceback.format_exc())
                await self.writer.drain() 

# 需要導入模塊: import asyncio [as 別名]
# 或者: from asyncio import StreamReader [as 別名]
def open_serial_connection(*,
                           loop=None,
                           limit=asyncio.streams._DEFAULT_LIMIT,
                           **kwargs):
    """A wrapper for create_serial_connection() returning a (reader,
    writer) pair.

    The reader returned is a StreamReader instance; the writer is a
    StreamWriter instance.

    The arguments are all the usual arguments to Serial(). Additional
    optional keyword arguments are loop (to set the event loop instance
    to use) and limit (to set the buffer limit passed to the
    StreamReader.

    This function is a coroutine.
    """
    if loop is None:
        loop = asyncio.get_event_loop()
    reader = asyncio.StreamReader(limit=limit, loop=loop)
    protocol = asyncio.StreamReaderProtocol(reader, loop=loop)
    transport, _ = yield from create_serial_connection(
        loop=loop,
        protocol_factory=lambda: protocol,
        **kwargs)
    writer = asyncio.StreamWriter(transport, protocol, reader, loop)
    return reader, writer


# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
# test 

# 需要導入模塊: import asyncio [as 別名]
# 或者: from asyncio import StreamReader [as 別名]
def open_connection(host=None, port=None, *,
                          limit, loop=None,
                          parser=None, **kwds):
    # XXX: parser is not used (yet)
    if loop is not None and sys.version_info >= (3, 8):
        warnings.warn("The loop argument is deprecated",
                      DeprecationWarning)
    reader = StreamReader(limit=limit)
    protocol = asyncio.StreamReaderProtocol(reader)
    transport, _ = await get_event_loop().create_connection(
        lambda: protocol, host, port, **kwds)
    writer = asyncio.StreamWriter(transport, protocol, reader,
                                  loop=get_event_loop())
    return reader, writer 

# 需要導入模塊: import asyncio [as 別名]
# 或者: from asyncio import StreamReader [as 別名]
def open_unix_connection(address, *,
                               limit, loop=None,
                               parser=None, **kwds):
    # XXX: parser is not used (yet)
    if loop is not None and sys.version_info >= (3, 8):
        warnings.warn("The loop argument is deprecated",
                      DeprecationWarning)
    reader = StreamReader(limit=limit)
    protocol = asyncio.StreamReaderProtocol(reader)
    transport, _ = await get_event_loop().create_unix_connection(
        lambda: protocol, address, **kwds)
    writer = asyncio.StreamWriter(transport, protocol, reader,
                                  loop=get_event_loop())
    return reader, writer 

# 需要導入模塊: import asyncio [as 別名]
# 或者: from asyncio import StreamReader [as 別名]
def _handshake(
    initiator: "HandshakeInitiator",
    reader: asyncio.StreamReader,
    writer: asyncio.StreamWriter,
    token: CancelToken,
) -> Tuple[bytes, bytes, BasePreImage, BasePreImage]:
    """See the handshake() function above.

    This code was factored out into this helper so that we can create Peers with directly
    connected readers/writers for our tests.
    """
    initiator_nonce = keccak(os.urandom(HASH_LEN))
    auth_msg = initiator.create_auth_message(initiator_nonce)
    auth_init = initiator.encrypt_auth_message(auth_msg)
    writer.write(auth_init)

    auth_ack = await token.cancellable_wait(
        reader.read(ENCRYPTED_AUTH_ACK_LEN), timeout=REPLY_TIMEOUT
    )

    if reader.at_eof():
        # This is what happens when Parity nodes have blacklisted us
        # (https://github.com/ethereum/py-evm/issues/901).
        raise HandshakeDisconnectedFailure(
            "%s disconnected before sending auth ack", repr(initiator.remote)
        )

    ephemeral_pubkey, responder_nonce = initiator.decode_auth_ack_message(auth_ack)
    aes_secret, mac_secret, egress_mac, ingress_mac = initiator.derive_secrets(
        initiator_nonce, responder_nonce, ephemeral_pubkey, auth_init, auth_ack
    )

    return aes_secret, mac_secret, egress_mac, ingress_mac 

# 需要導入模塊: import asyncio [as 別名]
# 或者: from asyncio import StreamReader [as 別名]
def connect(self) -> Tuple[asyncio.StreamReader, asyncio.StreamWriter]:
        return await self.cancel_token.cancellable_wait(
            asyncio.open_connection(
                host=self.remote.address.ip, port=self.remote.address.tcp_port
            ),
            timeout=REPLY_TIMEOUT,
        ) 

# 需要導入模塊: import asyncio [as 別名]
# 或者: from asyncio import StreamReader [as 別名]
def receive_handshake(
        self, reader: asyncio.StreamReader, writer: asyncio.StreamWriter
    ) -> None:
        ip, socket, *_ = writer.get_extra_info("peername")
        remote_address = Address(ip, socket)
        if self.peer_pool.chk_dialin_blacklist(remote_address):
            Logger.info_every_n(
                "{} has been blacklisted, refusing connection".format(remote_address),
                100,
            )
            reader.feed_eof()
            writer.close()
        expected_exceptions = (
            TimeoutError,
            PeerConnectionLost,
            HandshakeFailure,
            asyncio.IncompleteReadError,
            HandshakeDisconnectedFailure,
        )
        try:
            await self._receive_handshake(reader, writer)
        except expected_exceptions as e:
            self.logger.debug("Could not complete handshake: %s", e)
            Logger.error_every_n("Could not complete handshake: {}".format(e), 100)
            reader.feed_eof()
            writer.close()
        except OperationCancelled:
            self.logger.error("OperationCancelled")
            reader.feed_eof()
            writer.close()
        except Exception as e:
            self.logger.exception("Unexpected error handling handshake")
            reader.feed_eof()
            writer.close()