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 (pyqtSignal, QByteArray, QDataStream, QIODevice, 48 QThread) 49from PyQt5.QtWidgets import (QApplication, QDialog, QHBoxLayout, QLabel, 50 QMessageBox, QPushButton, QVBoxLayout) 51from PyQt5.QtNetwork import (QHostAddress, QNetworkInterface, QTcpServer, 52 QTcpSocket) 53 54 55class FortuneThread(QThread): 56 error = pyqtSignal(QTcpSocket.SocketError) 57 58 def __init__(self, socketDescriptor, fortune, parent): 59 super(FortuneThread, self).__init__(parent) 60 61 self.socketDescriptor = socketDescriptor 62 self.text = fortune 63 64 def run(self): 65 tcpSocket = QTcpSocket() 66 if not tcpSocket.setSocketDescriptor(self.socketDescriptor): 67 self.error.emit(tcpSocket.error()) 68 return 69 70 block = QByteArray() 71 outstr = QDataStream(block, QIODevice.WriteOnly) 72 outstr.setVersion(QDataStream.Qt_4_0) 73 outstr.writeUInt16(0) 74 outstr.writeQString(self.text) 75 outstr.device().seek(0) 76 outstr.writeUInt16(block.size() - 2) 77 78 tcpSocket.write(block) 79 tcpSocket.disconnectFromHost() 80 tcpSocket.waitForDisconnected() 81 82 83class FortuneServer(QTcpServer): 84 FORTUNES = ( 85 "You've been leading a dog's life. Stay off the furniture.", 86 "You've got to think about tomorrow.", 87 "You will be surprised by a loud noise.", 88 "You will feel hungry again in another hour.", 89 "You might have mail.", 90 "You cannot kill time without injuring eternity.", 91 "Computers are not intelligent. They only think they are.") 92 93 def incomingConnection(self, socketDescriptor): 94 fortune = self.FORTUNES[random.randint(0, len(self.FORTUNES) - 1)] 95 96 thread = FortuneThread(socketDescriptor, fortune, self) 97 thread.finished.connect(thread.deleteLater) 98 thread.start() 99 100 101class Dialog(QDialog): 102 def __init__(self, parent=None): 103 super(Dialog, self).__init__(parent) 104 105 self.server = FortuneServer() 106 107 statusLabel = QLabel() 108 statusLabel.setWordWrap(True) 109 quitButton = QPushButton("Quit") 110 quitButton.setAutoDefault(False) 111 112 if not self.server.listen(): 113 QMessageBox.critical(self, "Threaded Fortune Server", 114 "Unable to start the server: %s." % self.server.errorString()) 115 self.close() 116 return 117 118 for ipAddress in QNetworkInterface.allAddresses(): 119 if ipAddress != QHostAddress.LocalHost and ipAddress.toIPv4Address() != 0: 120 break 121 else: 122 ipAddress = QHostAddress(QHostAddress.LocalHost) 123 124 ipAddress = ipAddress.toString() 125 126 statusLabel.setText("The server is running on\n\nIP: %s\nport: %d\n\n" 127 "Run the Fortune Client example now." % (ipAddress, self.server.serverPort())) 128 129 quitButton.clicked.connect(self.close) 130 131 buttonLayout = QHBoxLayout() 132 buttonLayout.addStretch(1) 133 buttonLayout.addWidget(quitButton) 134 buttonLayout.addStretch(1) 135 136 mainLayout = QVBoxLayout() 137 mainLayout.addWidget(statusLabel) 138 mainLayout.addLayout(buttonLayout) 139 self.setLayout(mainLayout) 140 141 self.setWindowTitle("Threaded Fortune Server") 142 143 144if __name__ == '__main__': 145 146 import sys 147 148 app = QApplication(sys.argv) 149 dialog = Dialog() 150 dialog.show() 151 sys.exit(dialog.exec_()) 152