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228 lines
8.6 KiB
Python
228 lines
8.6 KiB
Python
#!/usr/bin/env python
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#############################################################################
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##
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## Copyright (C) 2013 Riverbank Computing Limited.
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## Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
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## All rights reserved.
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##
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## This file is part of the examples of PyQt.
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##
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## $QT_BEGIN_LICENSE:BSD$
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## You may use this file under the terms of the BSD license as follows:
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##
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## "Redistribution and use in source and binary forms, with or without
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## modification, are permitted provided that the following conditions are
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## met:
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## * Redistributions of source code must retain the above copyright
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## notice, this list of conditions and the following disclaimer.
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## * Redistributions in binary form must reproduce the above copyright
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## notice, this list of conditions and the following disclaimer in
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## the documentation and/or other materials provided with the
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## distribution.
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## * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
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## the names of its contributors may be used to endorse or promote
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## products derived from this software without specific prior written
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## permission.
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##
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## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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## "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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## LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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## A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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## OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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## SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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## LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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## DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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## THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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## (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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## OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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## $QT_END_LICENSE$
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##
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#############################################################################
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from PyQt5.QtCore import QDataStream, QSettings, QTimer
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from PyQt5.QtGui import QIntValidator
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from PyQt5.QtWidgets import (QApplication, QComboBox, QDialog,
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QDialogButtonBox, QGridLayout, QLabel, QLineEdit, QMessageBox,
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QPushButton)
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from PyQt5.QtNetwork import (QAbstractSocket, QHostInfo, QNetworkConfiguration,
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QNetworkConfigurationManager, QNetworkInterface, QNetworkSession,
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QTcpSocket)
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class Client(QDialog):
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def __init__(self, parent=None):
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super(Client, self).__init__(parent)
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self.networkSession = None
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self.blockSize = 0
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self.currentFortune = ''
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hostLabel = QLabel("&Server name:")
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portLabel = QLabel("S&erver port:")
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self.hostCombo = QComboBox()
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self.hostCombo.setEditable(True)
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name = QHostInfo.localHostName()
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if name != '':
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self.hostCombo.addItem(name)
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domain = QHostInfo.localDomainName()
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if domain != '':
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self.hostCombo.addItem(name + '.' + domain)
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if name != 'localhost':
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self.hostCombo.addItem('localhost')
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ipAddressesList = QNetworkInterface.allAddresses()
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for ipAddress in ipAddressesList:
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if not ipAddress.isLoopback():
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self.hostCombo.addItem(ipAddress.toString())
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for ipAddress in ipAddressesList:
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if ipAddress.isLoopback():
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self.hostCombo.addItem(ipAddress.toString())
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self.portLineEdit = QLineEdit()
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self.portLineEdit.setValidator(QIntValidator(1, 65535, self))
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hostLabel.setBuddy(self.hostCombo)
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portLabel.setBuddy(self.portLineEdit)
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self.statusLabel = QLabel("This examples requires that you run "
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"the Fortune Server example as well.")
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self.getFortuneButton = QPushButton("Get Fortune")
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self.getFortuneButton.setDefault(True)
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self.getFortuneButton.setEnabled(False)
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quitButton = QPushButton("Quit")
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buttonBox = QDialogButtonBox()
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buttonBox.addButton(self.getFortuneButton, QDialogButtonBox.ActionRole)
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buttonBox.addButton(quitButton, QDialogButtonBox.RejectRole)
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self.tcpSocket = QTcpSocket(self)
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self.hostCombo.editTextChanged.connect(self.enableGetFortuneButton)
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self.portLineEdit.textChanged.connect(self.enableGetFortuneButton)
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self.getFortuneButton.clicked.connect(self.requestNewFortune)
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quitButton.clicked.connect(self.close)
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self.tcpSocket.readyRead.connect(self.readFortune)
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self.tcpSocket.error.connect(self.displayError)
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mainLayout = QGridLayout()
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mainLayout.addWidget(hostLabel, 0, 0)
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mainLayout.addWidget(self.hostCombo, 0, 1)
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mainLayout.addWidget(portLabel, 1, 0)
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mainLayout.addWidget(self.portLineEdit, 1, 1)
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mainLayout.addWidget(self.statusLabel, 2, 0, 1, 2)
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mainLayout.addWidget(buttonBox, 3, 0, 1, 2)
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self.setLayout(mainLayout)
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self.setWindowTitle("Fortune Client")
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self.portLineEdit.setFocus()
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manager = QNetworkConfigurationManager()
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if manager.capabilities() & QNetworkConfigurationManager.NetworkSessionRequired:
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settings = QSettings(QSettings.UserScope, 'QtProject')
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settings.beginGroup('QtNetwork')
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id = settings.value('DefaultNetworkConfiguration')
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settings.endGroup()
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config = manager.configurationFromIdentifier(id)
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if config.state() & QNetworkConfiguration.Discovered == 0:
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config = manager.defaultConfiguration()
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self.networkSession = QNetworkSession(config, self)
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self.networkSession.opened.connect(self.sessionOpened)
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self.getFortuneButton.setEnabled(False)
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self.statusLabel.setText("Opening network session.")
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self.networkSession.open()
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def requestNewFortune(self):
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self.getFortuneButton.setEnabled(False)
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self.blockSize = 0
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self.tcpSocket.abort()
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self.tcpSocket.connectToHost(self.hostCombo.currentText(),
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int(self.portLineEdit.text()))
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def readFortune(self):
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instr = QDataStream(self.tcpSocket)
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instr.setVersion(QDataStream.Qt_4_0)
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if self.blockSize == 0:
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if self.tcpSocket.bytesAvailable() < 2:
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return
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self.blockSize = instr.readUInt16()
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if self.tcpSocket.bytesAvailable() < self.blockSize:
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return
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nextFortune = instr.readQString()
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if nextFortune == self.currentFortune:
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QTimer.singleShot(0, self.requestNewFortune)
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return
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self.currentFortune = nextFortune
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self.statusLabel.setText(self.currentFortune)
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self.getFortuneButton.setEnabled(True)
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def displayError(self, socketError):
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if socketError == QAbstractSocket.RemoteHostClosedError:
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pass
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elif socketError == QAbstractSocket.HostNotFoundError:
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QMessageBox.information(self, "Fortune Client",
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"The host was not found. Please check the host name and "
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"port settings.")
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elif socketError == QAbstractSocket.ConnectionRefusedError:
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QMessageBox.information(self, "Fortune Client",
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"The connection was refused by the peer. Make sure the "
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"fortune server is running, and check that the host name "
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"and port settings are correct.")
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else:
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QMessageBox.information(self, "Fortune Client",
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"The following error occurred: %s." % self.tcpSocket.errorString())
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self.getFortuneButton.setEnabled(True)
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def enableGetFortuneButton(self):
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self.getFortuneButton.setEnabled(
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(self.networkSession is None or self.networkSession.isOpen())
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and self.hostCombo.currentText() != ''
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and self.portLineEdit.text() != '')
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def sessionOpened(self):
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config = self.networkSession.configuration()
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if config.type() == QNetworkConfiguration.UserChoice:
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id = self.networkSession.sessionProperty('UserChoiceConfiguration')
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else:
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id = config.identifier()
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settings = QSettings(QSettings.UserScope, 'QtProject')
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settings.beginGroup('QtNetwork')
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settings.setValue('DefaultNetworkConfiguration', id)
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settings.endGroup()
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self.statusLabel.setText("This examples requires that you run the "
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"Fortune Server example as well.")
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self.enableGetFortuneButton()
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if __name__ == '__main__':
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import sys
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app = QApplication(sys.argv)
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client = Client()
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client.show()
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sys.exit(client.exec_())
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