server.cpp Example File

ipc/localfortuneserver/server.cpp
/**************************************************************************** ** ** Copyright (C) 2016 The Qt Company Ltd. ** Contact: https://www.qt.io/licensing/ ** ** This file is part of the examples of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:BSD$ ** Commercial License Usage ** Licensees holding valid commercial Qt licenses may use this file in ** accordance with the commercial license agreement provided with the ** Software or, alternatively, in accordance with the terms contained in ** a written agreement between you and The Qt Company. For licensing terms ** and conditions see https://www.qt.io/terms-conditions. For further ** information use the contact form at https://www.qt.io/contact-us. ** ** BSD License Usage ** Alternatively, you may use this file under the terms of the BSD license ** as follows: ** ** "Redistribution and use in source and binary forms, with or without ** modification, are permitted provided that the following conditions are ** met: ** * 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 ** notice, this list of conditions and the following disclaimer in ** the documentation and/or other materials provided with the ** distribution. ** * Neither the name of The Qt Company Ltd nor the names of its ** contributors may be used to endorse or promote products derived ** from this software without specific prior written permission. ** ** ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." ** ** $QT_END_LICENSE$ ** ****************************************************************************/
#include <QtWidgets> #include <QtNetwork> #include <stdlib.h> #include "server.h" #include <qlocalserver.h> #include <qlocalsocket.h> Server::Server(QWidget *parent) : QDialog(parent) { statusLabel = new QLabel; statusLabel->setWordWrap(true); quitButton = new QPushButton(tr("Quit")); quitButton->setAutoDefault(false); server = new QLocalServer(this); if (!server->listen("fortune")) { QMessageBox::critical(this, tr("Fortune Server"), tr("Unable to start the server: %1.") .arg(server->errorString())); close(); return; } statusLabel->setText(tr("The server is running.\n" "Run the Fortune Client example now.")); fortunes << tr("You've been leading a dog's life. Stay off the furniture.") << tr("You've got to think about tomorrow.") << tr("You will be surprised by a loud noise.") << tr("You will feel hungry again in another hour.") << tr("You might have mail.") << tr("You cannot kill time without injuring eternity.") << tr("Computers are not intelligent. They only think they are."); connect(quitButton, SIGNAL(clicked()), this, SLOT(close())); connect(server, SIGNAL(newConnection()), this, SLOT(sendFortune())); QHBoxLayout *buttonLayout = new QHBoxLayout; buttonLayout->addStretch(1); buttonLayout->addWidget(quitButton); buttonLayout->addStretch(1); QVBoxLayout *mainLayout = new QVBoxLayout; mainLayout->addWidget(statusLabel); mainLayout->addLayout(buttonLayout); setLayout(mainLayout); setWindowTitle(tr("Fortune Server")); } void Server::sendFortune() { QByteArray block; QDataStream out(&block, QIODevice::WriteOnly); out.setVersion(QDataStream::Qt_4_0); out << (quint32)0; out << fortunes.at(qrand() % fortunes.size()); out.device()->seek(0); out << (quint32)(block.size() - sizeof(quint32)); QLocalSocket *clientConnection = server->nextPendingConnection(); connect(clientConnection, SIGNAL(disconnected()), clientConnection, SLOT(deleteLater())); clientConnection->write(block); clientConnection->flush(); clientConnection->disconnectFromServer(); }