#!/usr/bin/env python
#############################################################################
##
## Copyright (C) 2013 Riverbank Computing Limited.
## Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
## All rights reserved.
##
## This file is part of the examples of PyQt.
##
## $QT_BEGIN_LICENSE:BSD$
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## * Redistributions of source code must retain the above copyright
## notice, this list of conditions and the following disclaimer.
## * Redistributions in binary form must reproduce the above copyright
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## * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
## the names of its contributors may be used to endorse or promote
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## $QT_END_LICENSE$
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#############################################################################
from PyQt5.QtCore import QDataStream, QSettings, QTimer
from PyQt5.QtGui import QIntValidator
from PyQt5.QtWidgets import (QApplication, QComboBox, QDialog,
QDialogButtonBox, QGridLayout, QLabel, QLineEdit, QMessageBox,
QPushButton)
from PyQt5.QtNetwork import (QAbstractSocket, QHostInfo, QNetworkConfiguration,
QNetworkConfigurationManager, QNetworkInterface, QTcpSocket)
class Client(QDialog):
def __init__(self, parent=None):
super(Client, self).__init__(parent)
self.networkSession = None
self.blockSize = 0
self.currentFortune = ''
hostLabel = QLabel("&Server name:")
portLabel = QLabel("S&erver port:")
self.hostCombo = QComboBox()
self.hostCombo.setEditable(True)
name = QHostInfo.localHostName()
if name != '':
self.hostCombo.addItem(name)
domain = QHostInfo.localDomainName()
if domain != '':
self.hostCombo.addItem(name + '.' + domain)
if name != 'localhost':
self.hostCombo.addItem('localhost')
ipAddressesList = QNetworkInterface.allAddresses()
for ipAddress in ipAddressesList:
if not ipAddress.isLoopback():
self.hostCombo.addItem(ipAddress.toString())
for ipAddress in ipAddressesList:
if ipAddress.isLoopback():
self.hostCombo.addItem(ipAddress.toString())
self.portLineEdit = QLineEdit()
self.portLineEdit.setValidator(QIntValidator(1, 65535, self))
hostLabel.setBuddy(self.hostCombo)
portLabel.setBuddy(self.portLineEdit)
self.statusLabel = QLabel("This examples requires that you run "
"the Fortune Server example as well.")
self.getFortuneButton = QPushButton("Get Fortune")
self.getFortuneButton.setDefault(True)
self.getFortuneButton.setEnabled(False)
quitButton = QPushButton("Quit")
buttonBox = QDialogButtonBox()
buttonBox.addButton(self.getFortuneButton, QDialogButtonBox.ActionRole)
buttonBox.addButton(quitButton, QDialogButtonBox.RejectRole)
self.tcpSocket = QTcpSocket(self)
self.hostCombo.editTextChanged.connect(self.enableGetFortuneButton)
self.portLineEdit.textChanged.connect(self.enableGetFortuneButton)
self.getFortuneButton.clicked.connect(self.requestNewFortune)
quitButton.clicked.connect(self.close)
self.tcpSocket.readyRead.connect(self.readFortune)
self.tcpSocket.error.connect(self.displayError)
mainLayout = QGridLayout()
mainLayout.addWidget(hostLabel, 0, 0)
mainLayout.addWidget(self.hostCombo, 0, 1)
mainLayout.addWidget(portLabel, 1, 0)
mainLayout.addWidget(self.portLineEdit, 1, 1)
mainLayout.addWidget(self.statusLabel, 2, 0, 1, 2)
mainLayout.addWidget(buttonBox, 3, 0, 1, 2)
self.setLayout(mainLayout)
self.setWindowTitle("Fortune Client")
self.portLineEdit.setFocus()
manager = QNetworkConfigurationManager()
if manager.capabilities() & QNetworkConfigurationManager.NetworkSessionRequired:
settings = QSettings(QSettings.UserScope, 'QtProject')
settings.beginGroup('QtNetwork')
id = settings.value('DefaultNetworkConfiguration')
settings.endGroup()
config = manager.configurationFromIdentifier(id)
if config.state() & QNetworkConfiguration.Discovered == 0:
config = manager.defaultConfiguration()
self.networkSession = QNetworkSession(config, self)
self.networkSession.opened.connect(self.sessionOpened)
self.getFortuneButton.setEnabled(False)
self.statusLabel.setText("Opening network session.")
self.networkSession.open()
def requestNewFortune(self):
self.getFortuneButton.setEnabled(False)
self.blockSize = 0
self.tcpSocket.abort()
self.tcpSocket.connectToHost(self.hostCombo.currentText(),
int(self.portLineEdit.text()))
def readFortune(self):
instr = QDataStream(self.tcpSocket)
instr.setVersion(QDataStream.Qt_4_0)
if self.blockSize == 0:
if self.tcpSocket.bytesAvailable() < 2:
return
self.blockSize = instr.readUInt16()
if self.tcpSocket.bytesAvailable() < self.blockSize:
return
nextFortune = instr.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):
if socketError == QAbstractSocket.RemoteHostClosedError:
pass
elif socketError == QAbstractSocket.HostNotFoundError:
QMessageBox.information(self, "Fortune Client",
"The host was not found. Please check the host name and "
"port settings.")
elif socketError == QAbstractSocket.ConnectionRefusedError:
QMessageBox.information(self, "Fortune Client",
"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.")
else:
QMessageBox.information(self, "Fortune Client",
"The following error occurred: %s." % self.tcpSocket.errorString())
self.getFortuneButton.setEnabled(True)
def enableGetFortuneButton(self):
self.getFortuneButton.setEnabled(
(self.networkSession is None or self.networkSession.isOpen())
and self.hostCombo.currentText() != ''
and self.portLineEdit.text() != '')
def sessionOpened(self):
config = self.networkSession.configuration()
if config.type() == QNetworkConfiguration.UserChoice:
id = self.networkSession.sessionProperty('UserChoiceConfiguration')
else:
id = config.identifier()
settings = QSettings(QSettings.UserScope, 'QtProject')
settings.beginGroup('QtNetwork')
settings.setValue('DefaultNetworkConfiguration', id)
settings.endGroup()
self.statusLabel.setText("This examples requires that you run the "
"Fortune Server example as well.")
self.enableGetFortuneButton()
if __name__ == '__main__':
import sys
app = QApplication(sys.argv)
client = Client()
client.show()
sys.exit(client.exec_())
