Python QtNetwork.QLocalSocket类代码示例

    def __readCommands(self, connection: QLocalSocket) -> None:
        line = connection.readLine()
        while len(line) != 0:    # There is also a .canReadLine()
            try:
                payload = json.loads(str(line, encoding = "ascii").strip())
                command = payload["command"]

                # Command: Remove all models from the build plate.
                if command == "clear-all":
                    self._application.callLater(lambda: self._application.deleteAll())

                # Command: Load a model file
                elif command == "open":
                    self._application.callLater(lambda f = payload["filePath"]: self._application._openFile(f))

                # Command: Activate the window and bring it to the top.
                elif command == "focus":
                    # Operating systems these days prevent windows from moving around by themselves.
                    # 'alert' or flashing the icon in the taskbar is the best thing we do now.
                    main_window = self._application.getMainWindow()
                    if main_window is not None:
                        self._application.callLater(lambda: main_window.alert(0)) # type: ignore # I don't know why MyPy complains here

                # Command: Close the socket connection. We're done.
                elif command == "close-connection":
                    connection.close()

                else:
                    Logger.log("w", "Received an unrecognized command " + str(command))
            except json.decoder.JSONDecodeError as ex:
                Logger.log("w", "Unable to parse JSON command '%s': %s", line, repr(ex))
            line = connection.readLine()

def get():
    """Return a remote Frescobaldi, or None if not available."""
    socket = QLocalSocket()
    name = os.environ.get("FRESCOBALDI_SOCKET")
    for name in (name,) if name else ids():
        socket.connectToServer(name)
        if socket.waitForConnected(5000):
            from . import api
            return api.Remote(socket)

def is_running():
    local_socket = QLocalSocket()
    local_socket.connectToServer("ninja_ide")
    if local_socket.state():
        # It's running
        result = (True, local_socket)
    else:
        # It's not running
        result = (False, local_socket)
    return result

    def test_other_error(self, ipc_server, monkeypatch):
        socket = QLocalSocket()
        ipc_server._socket = socket
        monkeypatch.setattr(socket, 'error',
                            lambda: QLocalSocket.ConnectionRefusedError)
        monkeypatch.setattr(socket, 'errorString',
                            lambda: "Connection refused")
        socket.setErrorString("Connection refused.")

        with pytest.raises(ipc.Error, match=r"Error while handling IPC "
                           r"connection: Connection refused \(error 0\)"):
            ipc_server.on_error(QLocalSocket.ConnectionRefusedError)

    def test_other_error(self, ipc_server, monkeypatch):
        socket = QLocalSocket()
        ipc_server._socket = socket
        monkeypatch.setattr(socket, 'error',
                            lambda: QLocalSocket.ConnectionRefusedError)
        monkeypatch.setattr(socket, 'errorString',
                            lambda: "Connection refused")
        socket.setErrorString("Connection refused.")

        with pytest.raises(ipc.Error) as excinfo:
            ipc_server.on_error(QLocalSocket.ConnectionRefusedError)

        expected = ("Error while handling IPC connection: Connection refused "
                    "(error 0)")
        assert str(excinfo.value) == expected

    def __init__(self, id, *argv):

        super(QtSingleApplication, self).__init__(*argv)
        self._id = id
        self._activationWindow = None
        self._activateOnMessage = False

        # Is there another instance running?
        self._outSocket = QLocalSocket()
        self._outSocket.connectToServer(self._id)
        self._isRunning = self._outSocket.waitForConnected()

        if self._isRunning:
            # Yes, there is.
            self._outStream = QTextStream(self._outSocket)
            self._outStream.setCodec("UTF-8")
        else:
            # No, there isn't.
            self._outSocket = None
            self._outStream = None
            self._inSocket = None
            self._inStream = None
            self._server = QLocalServer()
            self._server.listen(self._id)
            self._server.newConnection.connect(self._onNewConnection)

def init():
    """Start listening to incoming connections."""
    global _server
    if _server is not None:
        return
    
    server = QLocalServer(None)
    
    # find a free socket name to use
    for name in ids():
        if server.listen(name):
            break
    else:
        # all names failed, try to contact and remove stale file if that fails
        socket = QLocalSocket()
        for name in ids():
            socket.connectToServer(name)
            if not socket.waitForConnected(10000):
                QLocalServer.removeServer(name)
                if server.listen(name):
                    break
            else:
                socket.disconnectFromServer()
        else:
            # no ids left, don't listen
            return
    app.aboutToQuit.connect(server.close)
    server.newConnection.connect(slot_new_connection)
    os.environ["FRESCOBALDI_SOCKET"] = name
    _server = server

 def connectToRunning(self):
    self.socket = QLocalSocket()
    self.socket.connectToServer('nemuSocket')
    self.socket.waitForConnected(1000)
    
    if self.socket.state() == QLocalSocket.ConnectedState:
       print 'Server found'
       if self.socket.waitForReadyRead(3000):
          line = self.socket.readLine()
          print line
       else:
          print self.socket.errorString()
       sys.exit()
    else:
       print 'No server running'

    def __init__(self, win_id, *argv):

        logfunc = logging.info
        logfunc(sys._getframe().f_code.co_name + '()')

        QApplication.__init__(self, *argv)

        self._id = win_id
        self._activation_window = None
        self._activate_on_message = False

        # Is there another instance running?
        self._outSocket = QLocalSocket()
        self._outSocket.connectToServer(self._id)
        self._isRunning = self._outSocket.waitForConnected()

        self._outStream = None
        self._inSocket = None
        self._inStream = None
        self._server = None

        if self._isRunning:
            # Yes, there is.
            self._outStream = QTextStream(self._outSocket)
            self._outStream.setCodec('UTF-8')
        else:
            # No, there isn't, at least not properly.
            # Cleanup any past, crashed server.
            error = self._outSocket.error()
            logfunc(LOGVARSTR % ('self._outSocket.error()', error))
            if error == QLocalSocket.ConnectionRefusedError:
                logfunc('received QLocalSocket.ConnectionRefusedError; ' + \
                        'removing server.')
                self.close()
                QLocalServer.removeServer(self._id)
            self._outSocket = None
            self._server = QLocalServer()
            self._server.listen(self._id)
            self._server.newConnection.connect(self._on_new_connection)

        logfunc(sys._getframe().f_code.co_name + '(): returning')

 def connect(self):
     """
     Public method to connect the single application client to its server.
     
     @return value indicating success or an error number. Value is one of:
         <table>
             <tr><td>0</td><td>No application is running</td></tr>
             <tr><td>1</td><td>Application is already running</td></tr>
         </table>
     """
     self.sock = QLocalSocket()
     self.sock.connectToServer(self.name)
     if self.sock.waitForConnected(10000):
         self.connected = True
         return 1
     else:
         err = self.sock.error()
         if err == QLocalSocket.ServerNotFoundError:
             return 0
         else:
             return -err

    def __init__(self, parent=None):
        super(Client, self).__init__(parent)

        self.blockSize = 0
        self.currentFortune = None

        hostLabel = QLabel("&Server name:")
        self.hostLineEdit = QLineEdit("fortune")
        hostLabel.setBuddy(self.hostLineEdit)

        self.statusLabel = QLabel(
                "This examples requires that you run the Fortune Server "
                "example as well.")
        self.statusLabel.setWordWrap(True)

        self.getFortuneButton = QPushButton("Get Fortune")
        self.getFortuneButton.setDefault(True)

        quitButton = QPushButton("Quit")
        buttonBox = QDialogButtonBox()
        buttonBox.addButton(self.getFortuneButton, QDialogButtonBox.ActionRole)
        buttonBox.addButton(quitButton, QDialogButtonBox.RejectRole)

        self.socket = QLocalSocket()

        self.hostLineEdit.textChanged.connect(self.enableGetFortuneButton)
        self.getFortuneButton.clicked.connect(self.requestNewFortune)
        quitButton.clicked.connect(self.close)
        self.socket.readyRead.connect(self.readFortune)
        self.socket.error.connect(self.displayError)

        mainLayout = QGridLayout()
        mainLayout.addWidget(hostLabel, 0, 0)
        mainLayout.addWidget(self.hostLineEdit, 0, 1)
        mainLayout.addWidget(self.statusLabel, 2, 0, 1, 2)
        mainLayout.addWidget(buttonBox, 3, 0, 1, 2)
        self.setLayout(mainLayout)

        self.setWindowTitle("Fortune Client")
        self.hostLineEdit.setFocus()

    def __init__(self, id, *argv):

        super(SingleApplication, self).__init__(*argv)
        self._id = id
        self._activationWindow = None
        self._activateOnMessage = False

        # Check if another instance is running?
        self._outSocket = QLocalSocket()
        self._outSocket.connectToServer(self._id)
        self._isRunning = self._outSocket.waitForConnected()

        if self._isRunning:
            self._outStream = QtCore.QTextStream(self._outSocket)
            self._outStream.setCodec('UTF-8')
        else:
            self._outSocket = None
            self._outStream = None
            self._inSocket = None
            self._inStream = None
            self._server = QLocalServer()
            self._server.removeServer(self._id)  # if existing after crash-exit
            self._server.listen(self._id)
            self._server.newConnection.connect(self._onNewConnection)

def send_to_running_instance(socketname, command, target_arg, *, socket=None):
    """Try to send a commandline to a running instance.

    Blocks for CONNECT_TIMEOUT ms.

    Args:
        socketname: The name which should be used for the socket.
        command: The command to send to the running instance.
        target_arg: --target command line argument
        socket: The socket to read data from, or None.

    Return:
        True if connecting was successful, False if no connection was made.
    """
    if socket is None:
        socket = QLocalSocket()

    log.ipc.debug("Connecting to {}".format(socketname))
    socket.connectToServer(socketname)

    connected = socket.waitForConnected(CONNECT_TIMEOUT)
    if connected:
        log.ipc.info("Opening in existing instance")
        json_data = {'args': command, 'target_arg': target_arg,
                     'version': qutebrowser.__version__,
                     'protocol_version': PROTOCOL_VERSION}
        try:
            cwd = os.getcwd()
        except OSError:
            pass
        else:
            json_data['cwd'] = cwd
        line = json.dumps(json_data) + '\n'
        data = line.encode('utf-8')
        log.ipc.debug("Writing: {!r}".format(data))
        socket.writeData(data)
        socket.waitForBytesWritten(WRITE_TIMEOUT)
        if socket.error() != QLocalSocket.UnknownSocketError:
            raise SocketError("writing to running instance", socket)
        else:
            socket.disconnectFromServer()
            if socket.state() != QLocalSocket.UnconnectedState:
                socket.waitForDisconnected(CONNECT_TIMEOUT)
            return True
    else:
        if socket.error() not in [QLocalSocket.ConnectionRefusedError,
                                  QLocalSocket.ServerNotFoundError]:
            raise SocketError("connecting to running instance", socket)
        else:
            log.ipc.debug("No existing instance present (error {})".format(
                socket.error()))
            return False

def qlocalsocket(qapp):
    socket = QLocalSocket()
    yield socket
    socket.disconnectFromServer()
    if socket.state() != QLocalSocket.UnconnectedState:
        socket.waitForDisconnected(1000)

def send_to_running_instance(socketname, command):
    """Try to send a commandline to a running instance.

    Blocks for CONNECT_TIMEOUT ms.

    Args:
        socketname: The name which should be used for the socket.
        command: The command to send to the running instance.

    Return:
        True if connecting was successful, False if no connection was made.
    """
    socket = QLocalSocket()
    log.ipc.debug("Connecting to {}".format(socketname))
    socket.connectToServer(socketname)
    connected = socket.waitForConnected(100)
    if connected:
        log.ipc.info("Opening in existing instance")
        json_data = {'args': command}
        try:
            cwd = os.getcwd()
        except OSError:
            pass
        else:
            json_data['cwd'] = cwd
        line = json.dumps(json_data) + '\n'
        data = line.encode('utf-8')
        log.ipc.debug("Writing: {}".format(data))
        socket.writeData(data)
        socket.waitForBytesWritten(WRITE_TIMEOUT)
        if socket.error() != QLocalSocket.UnknownSocketError:
            _socket_error("writing to running instance", socket)
        else:
            socket.disconnectFromServer()
            if socket.state() != QLocalSocket.UnconnectedState:
                socket.waitForDisconnected(100)
            return True
    else:
        if socket.error() not in (QLocalSocket.ConnectionRefusedError,
                                  QLocalSocket.ServerNotFoundError):
            _socket_error("connecting to running instance", socket)
        else:
            log.ipc.debug("No existing instance present (error {})".format(
                socket.error()))
            return False