Python QLocalSocket.error方法代码示例

# 需要导入模块: from PyQt5.QtNetwork import QLocalSocket [as 别名]
# 或者: from PyQt5.QtNetwork.QLocalSocket import error [as 别名]
def send_to_running_instance(socketname, command, target_arg, *,
                             legacy_name=None, 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.
        legacy_name: The legacy name to first try to connect to.

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

    if (legacy_name is not None and
            _has_legacy_server(legacy_name)):
        name_to_use = legacy_name
    else:
        name_to_use = socketname

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

    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: {}".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

# 需要导入模块: from PyQt5.QtNetwork import QLocalSocket [as 别名]
# 或者: from PyQt5.QtNetwork.QLocalSocket import error [as 别名]
def send_to_running_instance(cmdlist):
    """Try to send a commandline to a running instance.

    Blocks for CONNECT_TIMEOUT ms.

    Args:
        cmdlist: A list to send (URLs/commands)

    Return:
        True if connecting was successful, False if no connection was made.
    """
    socket = QLocalSocket()
    socket.connectToServer(SOCKETNAME)
    connected = socket.waitForConnected(100)
    if connected:
        log.ipc.info("Opening in existing instance")
        line = json.dumps(cmdlist) + '\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:
            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

# 需要导入模块: from PyQt5.QtNetwork import QLocalSocket [as 别名]
# 或者: from PyQt5.QtNetwork.QLocalSocket import error [as 别名]
def _has_legacy_server(name):
    """Check if there is a legacy server.

    Args:
        name: The name to try to connect to.

    Return:
        True if there is a server with the given name, False otherwise.
    """
    socket = QLocalSocket()
    log.ipc.debug("Trying to connect to {}".format(name))
    socket.connectToServer(name)

    err = socket.error()

    if err != QLocalSocket.UnknownSocketError:
        log.ipc.debug("Socket error: {} ({})".format(socket.errorString(), err))

    os_x_fail = (
        sys.platform == "darwin" and socket.errorString() == "QLocalSocket::connectToServer: " "Unknown error 38"
    )

    if err not in [QLocalSocket.ServerNotFoundError, QLocalSocket.ConnectionRefusedError] and not os_x_fail:
        return True

    socket.disconnectFromServer()
    if socket.state() != QLocalSocket.UnconnectedState:
        socket.waitForDisconnected(CONNECT_TIMEOUT)
    return False

# 需要导入模块: from PyQt5.QtNetwork import QLocalSocket [as 别名]
# 或者: from PyQt5.QtNetwork.QLocalSocket import error [as 别名]
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

# 需要导入模块: from PyQt5.QtNetwork import QLocalSocket [as 别名]
# 或者: from PyQt5.QtNetwork.QLocalSocket import error [as 别名]
class QtSingleApplication(QApplication):
    """
    This class makes sure that we can only start one Tribler application.
    When a user tries to open a second Tribler instance, the current active one will be brought to front.
    """

    messageReceived = pyqtSignal(unicode)

    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 close(self):
        logfunc = logging.info
        logfunc(sys._getframe().f_code.co_name + '()')
        if self._inSocket:
            self._inSocket.disconnectFromServer()
        if self._outSocket:
            self._outSocket.disconnectFromServer()
        if self._server:
            self._server.close()
        logfunc(sys._getframe().f_code.co_name + '(): returning')

    def is_running(self):
        return self._isRunning

    def get_id(self):
        return self._id

    def activation_window(self):
        return self._activation_window

    def set_activation_window(self, activation_window, activate_on_message=True):
        self._activation_window = activation_window
        self._activate_on_message = activate_on_message

    def activate_window(self):
        if not self._activation_window:
            return
        self._activation_window.setWindowState(
            self._activation_window.windowState() & ~Qt.WindowMinimized)
        self._activation_window.raise_()

    def send_message(self, msg):
        if not self._outStream:
            return False
        self._outStream << msg << '\n'
        self._outStream.flush()
        return self._outSocket.waitForBytesWritten()

    def _on_new_connection(self):
        if self._inSocket:
            self._inSocket.readyRead.disconnect(self._on_ready_read)
        self._inSocket = self._server.nextPendingConnection()
        if not self._inSocket:
            return
        self._inStream = QTextStream(self._inSocket)
        self._inStream.setCodec('UTF-8')
        self._inSocket.readyRead.connect(self._on_ready_read)
        if self._activate_on_message:
            self.activate_window()

#.........这里部分代码省略.........

# 需要导入模块: from PyQt5.QtNetwork import QLocalSocket [as 别名]
# 或者: from PyQt5.QtNetwork.QLocalSocket import error [as 别名]
class SingleApplicationClient(object):
    """
    Class implementing the single application client base class.
    """
    def __init__(self, name):
        """
        Constructor
        
        @param name name of the local server to connect to (string)
        """
        self.name = name
        self.connected = False
        
    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 disconnect(self):
        """
        Public method to disconnect from the Single Appliocation server.
        """
        self.sock.disconnectFromServer()
        self.connected = False
    
    def processArgs(self, args):
        """
        Public method to process the command line args passed to the UI.
        
        <b>Note</b>: This method must be overridden by subclasses.
        
        @param args command line args (list of strings)
        @exception RuntimeError raised to indicate that this method must be
            implemented by a subclass
        """
        raise RuntimeError("'processArgs' must be overridden")
    
    def sendCommand(self, cmd):
        """
        Public method to send the command to the application server.
        
        @param cmd command to be sent (string)
        """
        if self.connected:
            self.sock.write(cmd)
            self.sock.flush()
        
    def errstr(self):
        """
        Public method to return a meaningful error string for the last error.
        
        @return error string for the last error (string)
        """
        return self.sock.errorString()