def __init__(self, argv, key): QApplication.__init__(self, argv) self._key = key self._timeout = 1000 socket = QLocalSocket(self) socket.connectToServer(self._key) if socket.waitForConnected(self._timeout): self._isRunning = True socket.abort() return socket.abort() self._isRunning = False self._server = QLocalServer(self) self._server.newConnection.connect(self.__onNewConnection) self._server.listen(self._key) self.aboutToQuit.connect(self.__onAboutToQuit)
class Client: def __init__(self): self.socket = QLocalSocket() self.socket.setServerName(piony.G_SOCKET_NAME) self.socket.error.connect(self.displayError) self.socket.disconnected.connect(self.socket.deleteLater) def _log_(self, text, *args): logger.info(self.__class__.__qualname__ + ': ' + text, *args) def connect(self): self.socket.abort() self._log_("connection attempt") self.socket.connectToServer() def send(self, argv): data = QByteArray() out = QDataStream(data, QIODevice.WriteOnly) out.setVersion(QDataStream.Qt_5_0) out.writeQVariant(argv) self._log_("writes: %s", str(data)) self.socket.write(data) self.socket.flush() self.socket.disconnectFromServer() def displayError(self, err): msg = { QLocalSocket.ServerNotFoundError: "The host was not found. Check the host name and port.", QLocalSocket.ConnectionRefusedError: "The connection was refused by the peer. " "Check server is running, it's host and port.", QLocalSocket.PeerClosedError: "Peer was closed", # None, }.get(err, "Client error: {}.".format(self.socket.errorString())) self._log_(msg)
class Client(QDialog): 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 requestNewFortune(self): self.getFortuneButton.setEnabled(False) self.blockSize = 0 self.socket.abort() self.socket.connectToServer(self.hostLineEdit.text()) def readFortune(self): ins = QDataStream(self.socket) ins.setVersion(QDataStream.Qt_4_0) if self.blockSize == 0: if self.socket.bytesAvailable() < 2: return self.blockSize = ins.readUInt16() if ins.atEnd(): return nextFortune = ins.readQString() if nextFortune == self.currentFortune: QTimer.singleShot(0, self.requestNewFortune) return self.currentFortune = nextFortune self.statusLabel.setText(self.currentFortune) self.getFortuneButton.setEnabled(True) def displayError(self, socketError): errors = { QLocalSocket.ServerNotFoundError: "The host was not found. Please check the host name and port " "settings.", QLocalSocket.ConnectionRefusedError: "The connection was refused by the peer. Make sure the " "fortune server is running, and check that the host name and " "port settings are correct.", QLocalSocket.PeerClosedError: None, } msg = errors.get( socketError, "The following error occurred: %s." % self.socket.errorString()) if msg is not None: QMessageBox.information(self, "Fortune Client", msg) self.getFortuneButton.setEnabled(True) def enableGetFortuneButton(self): self.getFortuneButton.setEnabled(self.hostLineEdit.text() != "")
class Client(QDialog): 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 requestNewFortune(self): self.getFortuneButton.setEnabled(False) self.blockSize = 0 self.socket.abort() self.socket.connectToServer(self.hostLineEdit.text()) def readFortune(self): ins = QDataStream(self.socket) ins.setVersion(QDataStream.Qt_4_0) if self.blockSize == 0: if self.socket.bytesAvailable() < 2: return self.blockSize = ins.readUInt16() if ins.atEnd(): return nextFortune = ins.readQString() if nextFortune == self.currentFortune: QTimer.singleShot(0, self.requestNewFortune) return self.currentFortune = nextFortune self.statusLabel.setText(self.currentFortune) self.getFortuneButton.setEnabled(True) def displayError(self, socketError): errors = { QLocalSocket.ServerNotFoundError: "The host was not found. Please check the host name and port " "settings.", QLocalSocket.ConnectionRefusedError: "The connection was refused by the peer. Make sure the " "fortune server is running, and check that the host name and " "port settings are correct.", QLocalSocket.PeerClosedError: None, } msg = errors.get(socketError, "The following error occurred: %s." % self.socket.errorString()) if msg is not None: QMessageBox.information(self, "Fortune Client", msg) self.getFortuneButton.setEnabled(True) def enableGetFortuneButton(self): self.getFortuneButton.setEnabled(self.hostLineEdit.text() != "")
class Client(QDialog): def __init__(self, parent: QWidget = None): super().__init__(parent) self._in = QDataStream() self.blockSize = 0 self.currentFortune = "" self.hostLineEdit = QLineEdit("fortune") self.getFortuneButton = QPushButton(self.tr("Get Fortune")) self.statusLabel = QLabel( self. tr("This examples requires that you run the Local Fortune Server example as well." )) self.socket = QLocalSocket(self) self.setWindowFlags(self.windowFlags() & ~Qt.WindowContextHelpButtonHint) hostLabel = QLabel(self.tr("&Server name:")) hostLabel.setBuddy(self.hostLineEdit) self.statusLabel.setWordWrap(True) self.getFortuneButton.setDefault(True) quitButton = QPushButton(self.tr("Quit")) buttonBox = QDialogButtonBox() buttonBox.addButton(self.getFortuneButton, QDialogButtonBox.ActionRole) buttonBox.addButton(quitButton, QDialogButtonBox.RejectRole) self._in.setDevice(self.socket) self._in.setVersion(QDataStream.Qt_5_10) 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.errorOccurred.connect(self.displayError) mainLayout = QGridLayout(self) 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.setWindowTitle(QGuiApplication.applicationDisplayName()) self.hostLineEdit.setFocus() @pyqtSlot() def requestNewFortune(self): self.getFortuneButton.setEnabled(False) self.blockSize = 0 self.socket.abort() self.socket.connectToServer(self.hostLineEdit.text()) @pyqtSlot() def readFortune(self): if self.blockSize == 0: # Relies on the fact that QDataStream serializes a quint32 into # sizeof(quint32) bytes if self.socket.bytesAvailable() < 4: # (int)sizeof(quint32)) return self.blockSize = self._in.readUInt32() if self.socket.bytesAvailable() < self.blockSize or self._in.atEnd(): return nextFortune = "" nextFortune = self._in.readQString() if nextFortune == self.currentFortune: QTimer.singleShot(0, self.requestNewFortune) return currentFortune = nextFortune self.statusLabel.setText(currentFortune) self.getFortuneButton.setEnabled(True) @pyqtSlot(QLocalSocket.LocalSocketError) def displayError(self, socketError): if socketError == QLocalSocket.ServerNotFoundError: QMessageBox.information( self, self.tr("Local Fortune Client"), self.tr("The host was not found. Please make sure " "that the server is running and that the " "server name is correct."), ) elif socketError == QLocalSocket.ConnectionRefusedError: QMessageBox.information( self, self.tr("Local Fortune Client"), self.tr("The connection was refused by the peer. " "Make sure the fortune server is running, " "and check that the server name is correct."), ) elif socketError == QLocalSocket.PeerClosedError: return else: QMessageBox.information( self, self.tr("Local Fortune Client"), self.tr("The following error occurred: %s." % (self.socket.errorString())), ) self.getFortuneButton.setEnabled(True) @pyqtSlot() def enableGetFortuneButton(self): self.getFortuneButton.setEnabled(bool(self.hostLineEdit.ext()))