examples/ipc/localfortuneserver/server.cpp
author Alex Gilkes <alex.gilkes@nokia.com>
Mon, 11 Jan 2010 14:00:40 +0000
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/****************************************************************************
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**
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** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the examples of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** No Commercial Usage
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** This file contains pre-release code and may not be distributed.
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** You may use this file in accordance with the terms and conditions
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** contained in the Technology Preview License Agreement accompanying
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** this package.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file.  Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights.  These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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**
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**
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**
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**
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**
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**
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include <QtGui>
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#include <QtNetwork>
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#include <stdlib.h>
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#include "server.h"
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#include <qlocalserver.h>
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#include <qlocalsocket.h>
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Server::Server(QWidget *parent)
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    : QDialog(parent)
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{
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    statusLabel = new QLabel;
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    quitButton = new QPushButton(tr("Quit"));
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    quitButton->setAutoDefault(false);
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    server = new QLocalServer(this);
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    if (!server->listen("fortune")) {
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        QMessageBox::critical(this, tr("Fortune Server"),
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                              tr("Unable to start the server: %1.")
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                              .arg(server->errorString()));
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        close();
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        return;
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    }
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    statusLabel->setText(tr("The server is running.\n"
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                            "Run the Fortune Client example now."));
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    fortunes << tr("You've been leading a dog's life. Stay off the furniture.")
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             << tr("You've got to think about tomorrow.")
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             << tr("You will be surprised by a loud noise.")
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             << tr("You will feel hungry again in another hour.")
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             << tr("You might have mail.")
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             << tr("You cannot kill time without injuring eternity.")
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             << tr("Computers are not intelligent. They only think they are.");
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    connect(quitButton, SIGNAL(clicked()), this, SLOT(close()));
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    connect(server, SIGNAL(newConnection()), this, SLOT(sendFortune()));
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    QHBoxLayout *buttonLayout = new 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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    QVBoxLayout *mainLayout = new QVBoxLayout;
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    mainLayout->addWidget(statusLabel);
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    mainLayout->addLayout(buttonLayout);
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    setLayout(mainLayout);
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    setWindowTitle(tr("Fortune Server"));
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}
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void Server::sendFortune()
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{
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    QByteArray block;
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    QDataStream out(&block, QIODevice::WriteOnly);
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    out.setVersion(QDataStream::Qt_4_0);
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    out << (quint16)0;
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    out << fortunes.at(qrand() % fortunes.size());
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    out.device()->seek(0);
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    out << (quint16)(block.size() - sizeof(quint16));
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    QLocalSocket *clientConnection = server->nextPendingConnection();
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    connect(clientConnection, SIGNAL(disconnected()),
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            clientConnection, SLOT(deleteLater()));
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    clientConnection->write(block);
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    clientConnection->flush();
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    clientConnection->disconnectFromServer();
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}