Python QLocalServer.serverError方法代码示例

# 需要导入模块: from PyQt5.QtNetwork import QLocalServer [as 别名]
# 或者: from PyQt5.QtNetwork.QLocalServer import serverError [as 别名]
class IPCServer(QObject):

    """IPC server to which clients connect to.

    Attributes:
        ignored: Whether requests are ignored (in exception hook).
        _timer: A timer to handle timeouts.
        _server: A QLocalServer to accept new connections.
        _socket: The QLocalSocket we're currently connected to.
        _socketname: The socketname to use.
        _socketopts_ok: Set if using setSocketOptions is working with this
                        OS/Qt version.
        _atime_timer: Timer to update the atime of the socket regularly.

    Signals:
        got_args: Emitted when there was an IPC connection and arguments were
                  passed.
        got_args: Emitted with the raw data an IPC connection got.
        got_invalid_data: Emitted when there was invalid incoming data.
    """

    got_args = pyqtSignal(list, str, str)
    got_raw = pyqtSignal(bytes)
    got_invalid_data = pyqtSignal()

    def __init__(self, socketname, parent=None):
        """Start the IPC server and listen to commands.

        Args:
            socketname: The socketname to use.
            parent: The parent to be used.
        """
        super().__init__(parent)
        self.ignored = False
        self._socketname = socketname

        self._timer = usertypes.Timer(self, "ipc-timeout")
        self._timer.setInterval(READ_TIMEOUT)
        self._timer.timeout.connect(self.on_timeout)

        if os.name == "nt":  # pragma: no coverage
            self._atime_timer = None
        else:
            self._atime_timer = usertypes.Timer(self, "ipc-atime")
            self._atime_timer.setInterval(ATIME_INTERVAL)
            self._atime_timer.timeout.connect(self.update_atime)
            self._atime_timer.setTimerType(Qt.VeryCoarseTimer)

        self._server = QLocalServer(self)
        self._server.newConnection.connect(self.handle_connection)

        self._socket = None
        self._socketopts_ok = os.name == "nt"
        if self._socketopts_ok:  # pragma: no cover
            # If we use setSocketOptions on Unix with Qt < 5.4, we get a
            # NameError while listening...
            log.ipc.debug("Calling setSocketOptions")
            self._server.setSocketOptions(QLocalServer.UserAccessOption)
        else:  # pragma: no cover
            log.ipc.debug("Not calling setSocketOptions")

    def _remove_server(self):
        """Remove an existing server."""
        ok = QLocalServer.removeServer(self._socketname)
        if not ok:
            raise Error("Error while removing server {}!".format(self._socketname))

    def listen(self):
        """Start listening on self._socketname."""
        log.ipc.debug("Listening as {}".format(self._socketname))
        if self._atime_timer is not None:  # pragma: no branch
            self._atime_timer.start()
        self._remove_server()
        ok = self._server.listen(self._socketname)
        if not ok:
            if self._server.serverError() == QAbstractSocket.AddressInUseError:
                raise AddressInUseError(self._server)
            else:
                raise ListenError(self._server)
        if not self._socketopts_ok:  # pragma: no cover
            # If we use setSocketOptions on Unix with Qt < 5.4, we get a
            # NameError while listening.
            # (see b135569d5c6e68c735ea83f42e4baf51f7972281)
            #
            # Also, we don't get an AddressInUseError with Qt 5.5:
            # https://bugreports.qt.io/browse/QTBUG-48635
            #
            # This means we only use setSocketOption on Windows...
            os.chmod(self._server.fullServerName(), 0o700)

    @pyqtSlot(int)
    def on_error(self, err):
        """Raise SocketError on fatal errors."""
        if self._socket is None:
            # Sometimes this gets called from stale sockets.
            log.ipc.debug("In on_error with None socket!")
            return
        self._timer.stop()
        log.ipc.debug("Socket error {}: {}".format(self._socket.error(), self._socket.errorString()))
        if err != QLocalSocket.PeerClosedError:
#.........这里部分代码省略.........

# 需要导入模块: from PyQt5.QtNetwork import QLocalServer [as 别名]
# 或者: from PyQt5.QtNetwork.QLocalServer import serverError [as 别名]
class IPCServer(QObject):

    """IPC server to which clients connect to.

    Attributes:
        ignored: Whether requests are ignored (in exception hook).
        _timer: A timer to handle timeouts.
        _server: A QLocalServer to accept new connections.
        _socket: The QLocalSocket we're currently connected to.
    """

    def __init__(self, parent=None):
        """Start the IPC server and listen to commands."""
        super().__init__(parent)
        self.ignored = False
        self._remove_server()
        self._timer = usertypes.Timer(self, 'ipc-timeout')
        self._timer.setInterval(READ_TIMEOUT)
        self._timer.timeout.connect(self.on_timeout)
        self._server = QLocalServer(self)
        ok = self._server.listen(SOCKETNAME)
        if not ok:
            raise IPCError("Error while listening to IPC server: {} "
                           "(error {})".format(self._server.errorString(),
                                               self._server.serverError()))
        self._server.newConnection.connect(self.handle_connection)
        self._socket = None

    def _remove_server(self):
        """Remove an existing server."""
        ok = QLocalServer.removeServer(SOCKETNAME)
        if not ok:
            raise IPCError("Error while removing server {}!".format(
                SOCKETNAME))

    @pyqtSlot(int)
    def on_error(self, error):
        """Convenience method which calls _socket_error on an error."""
        self._timer.stop()
        log.ipc.debug("Socket error {}: {}".format(
            self._socket.error(), self._socket.errorString()))
        if error != QLocalSocket.PeerClosedError:
            _socket_error("handling IPC connection", self._socket)

    @pyqtSlot()
    def handle_connection(self):
        """Handle a new connection to the server."""
        if self.ignored:
            return
        if self._socket is not None:
            log.ipc.debug("Got new connection but ignoring it because we're "
                          "still handling another one.")
            return
        socket = self._server.nextPendingConnection()
        if socket is None:
            log.ipc.debug("No new connection to handle.")
            return
        log.ipc.debug("Client connected.")
        self._timer.start()
        self._socket = socket
        socket.readyRead.connect(self.on_ready_read)
        if socket.canReadLine():
            log.ipc.debug("We can read a line immediately.")
            self.on_ready_read()
        socket.error.connect(self.on_error)
        if socket.error() not in (QLocalSocket.UnknownSocketError,
                                  QLocalSocket.PeerClosedError):
            log.ipc.debug("We got an error immediately.")
            self.on_error(socket.error())
        socket.disconnected.connect(self.on_disconnected)
        if socket.state() == QLocalSocket.UnconnectedState:
            log.ipc.debug("Socket was disconnected immediately.")
            self.on_disconnected()

    @pyqtSlot()
    def on_disconnected(self):
        """Clean up socket when the client disconnected."""
        log.ipc.debug("Client disconnected.")
        self._timer.stop()
        self._socket.deleteLater()
        self._socket = None
        # Maybe another connection is waiting.
        self.handle_connection()

    @pyqtSlot()
    def on_ready_read(self):
        """Read json data from the client."""
        if self._socket is None:
            # this happened once and I don't know why
            log.ipc.warn("In on_ready_read with None socket!")
            return
        self._timer.start()
        while self._socket is not None and self._socket.canReadLine():
            data = bytes(self._socket.readLine())
            log.ipc.debug("Read from socket: {}".format(data))
            try:
                decoded = data.decode('utf-8')
            except UnicodeDecodeError:
                log.ipc.error("Ignoring invalid IPC data.")
                log.ipc.debug("invalid data: {}".format(
#.........这里部分代码省略.........