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152 lines
5.3 KiB
Python
152 lines
5.3 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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import random
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from PyQt5.QtCore import (pyqtSignal, QByteArray, QDataStream, QIODevice,
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QThread)
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from PyQt5.QtWidgets import (QApplication, QDialog, QHBoxLayout, QLabel,
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QMessageBox, QPushButton, QVBoxLayout)
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from PyQt5.QtNetwork import (QHostAddress, QNetworkInterface, QTcpServer,
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QTcpSocket)
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class FortuneThread(QThread):
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error = pyqtSignal(QTcpSocket.SocketError)
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def __init__(self, socketDescriptor, fortune, parent):
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super(FortuneThread, self).__init__(parent)
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self.socketDescriptor = socketDescriptor
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self.text = fortune
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def run(self):
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tcpSocket = QTcpSocket()
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if not tcpSocket.setSocketDescriptor(self.socketDescriptor):
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self.error.emit(tcpSocket.error())
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return
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block = QByteArray()
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outstr = QDataStream(block, QIODevice.WriteOnly)
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outstr.setVersion(QDataStream.Qt_4_0)
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outstr.writeUInt16(0)
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outstr.writeQString(self.text)
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outstr.device().seek(0)
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outstr.writeUInt16(block.size() - 2)
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tcpSocket.write(block)
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tcpSocket.disconnectFromHost()
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tcpSocket.waitForDisconnected()
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class FortuneServer(QTcpServer):
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FORTUNES = (
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"You've been leading a dog's life. Stay off the furniture.",
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"You've got to think about tomorrow.",
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"You will be surprised by a loud noise.",
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"You will feel hungry again in another hour.",
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"You might have mail.",
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"You cannot kill time without injuring eternity.",
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"Computers are not intelligent. They only think they are.")
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def incomingConnection(self, socketDescriptor):
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fortune = self.FORTUNES[random.randint(0, len(self.FORTUNES) - 1)]
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thread = FortuneThread(socketDescriptor, fortune, self)
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thread.finished.connect(thread.deleteLater)
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thread.start()
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class Dialog(QDialog):
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def __init__(self, parent=None):
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super(Dialog, self).__init__(parent)
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self.server = FortuneServer()
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statusLabel = QLabel()
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statusLabel.setWordWrap(True)
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quitButton = QPushButton("Quit")
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quitButton.setAutoDefault(False)
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if not self.server.listen():
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QMessageBox.critical(self, "Threaded Fortune Server",
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"Unable to start the server: %s." % self.server.errorString())
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self.close()
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return
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for ipAddress in QNetworkInterface.allAddresses():
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if ipAddress != QHostAddress.LocalHost and ipAddress.toIPv4Address() != 0:
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break
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else:
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ipAddress = QHostAddress(QHostAddress.LocalHost)
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ipAddress = ipAddress.toString()
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statusLabel.setText("The server is running on\n\nIP: %s\nport: %d\n\n"
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"Run the Fortune Client example now." % (ipAddress, self.server.serverPort()))
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quitButton.clicked.connect(self.close)
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buttonLayout = QHBoxLayout()
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buttonLayout.addStretch(1)
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buttonLayout.addWidget(quitButton)
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buttonLayout.addStretch(1)
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mainLayout = QVBoxLayout()
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mainLayout.addWidget(statusLabel)
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mainLayout.addLayout(buttonLayout)
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self.setLayout(mainLayout)
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self.setWindowTitle("Threaded Fortune Server")
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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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dialog = Dialog()
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dialog.show()
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sys.exit(dialog.exec_())
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