1#!/usr/bin/env python 2 3 4############################################################################# 5## 6## Copyright (C) 2013 Riverbank Computing Limited. 7## Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). 8## All rights reserved. 9## 10## This file is part of the examples of PyQt. 11## 12## $QT_BEGIN_LICENSE:BSD$ 13## You may use this file under the terms of the BSD license as follows: 14## 15## "Redistribution and use in source and binary forms, with or without 16## modification, are permitted provided that the following conditions are 17## met: 18## * Redistributions of source code must retain the above copyright 19## notice, this list of conditions and the following disclaimer. 20## * Redistributions in binary form must reproduce the above copyright 21## notice, this list of conditions and the following disclaimer in 22## the documentation and/or other materials provided with the 23## distribution. 24## * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor 25## the names of its contributors may be used to endorse or promote 26## products derived from this software without specific prior written 27## permission. 28## 29## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 30## "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 31## LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 32## A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 33## OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 34## SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 35## LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 36## DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 37## THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 38## (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 39## OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." 40## $QT_END_LICENSE$ 41## 42############################################################################# 43 44 45import random 46 47from PyQt5.QtCore import QByteArray, QDataStream, QIODevice, QSettings 48from PyQt5.QtWidgets import (QApplication, QDialog, QHBoxLayout, QLabel, 49 QMessageBox, QPushButton, QVBoxLayout) 50from PyQt5.QtNetwork import (QHostAddress, QNetworkConfiguration, 51 QNetworkConfigurationManager, QNetworkInterface, QNetworkSession, 52 QTcpServer) 53 54 55class Server(QDialog): 56 FORTUNES = ( 57 "You've been leading a dog's life. Stay off the furniture.", 58 "You've got to think about tomorrow.", 59 "You will be surprised by a loud noise.", 60 "You will feel hungry again in another hour.", 61 "You might have mail.", 62 "You cannot kill time without injuring eternity.", 63 "Computers are not intelligent. They only think they are.") 64 65 def __init__(self, parent=None): 66 super(Server, self).__init__(parent) 67 68 self.tcpServer = None 69 self.networkSession = None 70 71 self.statusLabel = QLabel() 72 quitButton = QPushButton("Quit") 73 quitButton.setAutoDefault(False) 74 75 manager = QNetworkConfigurationManager() 76 if manager.capabilities() & QNetworkConfigurationManager.NetworkSessionRequired: 77 settings = QSettings(QSettings.UserScope, 'QtProject') 78 settings.beginGroup('QtNetwork') 79 id = settings.value('DefaultNetworkConfiguration', '') 80 settings.endGroup() 81 82 config = manager.configurationFromIdentifier(id) 83 if config.state() & QNetworkConfiguration.Discovered == 0: 84 config = manager.defaultConfiguration() 85 86 self.networkSession = QNetworkSession(config, self) 87 self.networkSession.opened.connect(self.sessionOpened) 88 89 self.statusLabel.setText("Opening network session.") 90 self.networkSession.open() 91 else: 92 self.sessionOpened() 93 94 quitButton.clicked.connect(self.close) 95 self.tcpServer.newConnection.connect(self.sendFortune) 96 97 buttonLayout = QHBoxLayout() 98 buttonLayout.addStretch(1) 99 buttonLayout.addWidget(quitButton) 100 buttonLayout.addStretch(1) 101 102 mainLayout = QVBoxLayout() 103 mainLayout.addWidget(self.statusLabel) 104 mainLayout.addLayout(buttonLayout) 105 self.setLayout(mainLayout) 106 107 self.setWindowTitle("Fortune Server") 108 109 def sessionOpened(self): 110 if self.networkSession is not None: 111 config = self.networkSession.configuration() 112 113 if config.type() == QNetworkConfiguration.UserChoice: 114 id = self.networkSession.sessionProperty('UserChoiceConfiguration') 115 else: 116 id = config.identifier() 117 118 settings = QSettings(QSettings.UserScope, 'QtProject') 119 settings.beginGroup('QtNetwork') 120 settings.setValue('DefaultNetworkConfiguration', id) 121 settings.endGroup(); 122 123 self.tcpServer = QTcpServer(self) 124 if not self.tcpServer.listen(): 125 QMessageBox.critical(self, "Fortune Server", 126 "Unable to start the server: %s." % self.tcpServer.errorString()) 127 self.close() 128 return 129 130 for ipAddress in QNetworkInterface.allAddresses(): 131 if ipAddress != QHostAddress.LocalHost and ipAddress.toIPv4Address() != 0: 132 break 133 else: 134 ipAddress = QHostAddress(QHostAddress.LocalHost) 135 136 ipAddress = ipAddress.toString() 137 138 self.statusLabel.setText("The server is running on\n\nIP: %s\nport %d\n\n" 139 "Run the Fortune Client example now." % (ipAddress, self.tcpServer.serverPort())) 140 141 def sendFortune(self): 142 fortune = self.FORTUNES[random.randint(0, len(self.FORTUNES) - 1)] 143 144 block = QByteArray() 145 out = QDataStream(block, QIODevice.WriteOnly) 146 out.setVersion(QDataStream.Qt_4_0) 147 out.writeUInt16(0) 148 out.writeQString(fortune) 149 out.device().seek(0) 150 out.writeUInt16(block.size() - 2) 151 152 clientConnection = self.tcpServer.nextPendingConnection() 153 clientConnection.disconnected.connect(clientConnection.deleteLater) 154 155 clientConnection.write(block) 156 clientConnection.disconnectFromHost() 157 158 159if __name__ == '__main__': 160 161 import sys 162 163 app = QApplication(sys.argv) 164 server = Server() 165 random.seed(None) 166 sys.exit(server.exec_()) 167