qt-everywhere-src-5.14.1/qtbase/examples/network/fortuneserver/server.cpp - orbit - Git at Google

 /****************************************************************************
 **
 ** Copyright (C) 2017 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 <QtCore>

 #include "server.h"

 Server::Server(QWidget *parent)
     : QDialog(parent)
     , statusLabel(new QLabel)
 {
     setWindowFlags(windowFlags() & ~Qt::WindowContextHelpButtonHint);
     statusLabel->setTextInteractionFlags(Qt::TextBrowserInteraction);

     QNetworkConfigurationManager manager;
     if (manager.capabilities() & QNetworkConfigurationManager::NetworkSessionRequired) {
         // Get saved network configuration
         QSettings settings(QSettings::UserScope, QLatin1String("QtProject"));
         settings.beginGroup(QLatin1String("QtNetwork"));
         const QString id = settings.value(QLatin1String("DefaultNetworkConfiguration")).toString();
         settings.endGroup();

         // If the saved network configuration is not currently discovered use the system default
         QNetworkConfiguration config = manager.configurationFromIdentifier(id);
         if ((config.state() & QNetworkConfiguration::Discovered) !=
             QNetworkConfiguration::Discovered) {
             config = manager.defaultConfiguration();
         }

         networkSession = new QNetworkSession(config, this);
         connect(networkSession, &QNetworkSession::opened, this, &Server::sessionOpened);

         statusLabel->setText(tr("Opening network session."));
         networkSession->open();
     } else {
         sessionOpened();
     }

     //! [2]
     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.");
     //! [2]
     auto quitButton = new QPushButton(tr("Quit"));
     quitButton->setAutoDefault(false);
     connect(quitButton, &QAbstractButton::clicked, this, &QWidget::close);
     //! [3]
     connect(tcpServer, &QTcpServer::newConnection, this, &Server::sendFortune);
     //! [3]

     auto buttonLayout = new QHBoxLayout;
     buttonLayout->addStretch(1);
     buttonLayout->addWidget(quitButton);
     buttonLayout->addStretch(1);

     QVBoxLayout *mainLayout = nullptr;
     if (QGuiApplication::styleHints()->showIsFullScreen() || QGuiApplication::styleHints()->showIsMaximized()) {
         auto outerVerticalLayout = new QVBoxLayout(this);
         outerVerticalLayout->addItem(new QSpacerItem(0, 0, QSizePolicy::Ignored, QSizePolicy::MinimumExpanding));
         auto outerHorizontalLayout = new QHBoxLayout;
         outerHorizontalLayout->addItem(new QSpacerItem(0, 0, QSizePolicy::MinimumExpanding, QSizePolicy::Ignored));
         auto groupBox = new QGroupBox(QGuiApplication::applicationDisplayName());
         mainLayout = new QVBoxLayout(groupBox);
         outerHorizontalLayout->addWidget(groupBox);
         outerHorizontalLayout->addItem(new QSpacerItem(0, 0, QSizePolicy::MinimumExpanding, QSizePolicy::Ignored));
         outerVerticalLayout->addLayout(outerHorizontalLayout);
         outerVerticalLayout->addItem(new QSpacerItem(0, 0, QSizePolicy::Ignored, QSizePolicy::MinimumExpanding));
     } else {
         mainLayout = new QVBoxLayout(this);
     }

     mainLayout->addWidget(statusLabel);
     mainLayout->addLayout(buttonLayout);

     setWindowTitle(QGuiApplication::applicationDisplayName());
 }

 void Server::sessionOpened()
 {
     // Save the used configuration
     if (networkSession) {
         QNetworkConfiguration config = networkSession->configuration();
         QString id;
         if (config.type() == QNetworkConfiguration::UserChoice)
             id = networkSession->sessionProperty(QLatin1String("UserChoiceConfiguration")).toString();
         else
             id = config.identifier();

         QSettings settings(QSettings::UserScope, QLatin1String("QtProject"));
         settings.beginGroup(QLatin1String("QtNetwork"));
         settings.setValue(QLatin1String("DefaultNetworkConfiguration"), id);
         settings.endGroup();
     }

 //! [0] //! [1]
     tcpServer = new QTcpServer(this);
     if (!tcpServer->listen()) {
         QMessageBox::critical(this, tr("Fortune Server"),
                               tr("Unable to start the server: %1.")
                               .arg(tcpServer->errorString()));
         close();
         return;
     }
 //! [0]
     QString ipAddress;
     QList<QHostAddress> ipAddressesList = QNetworkInterface::allAddresses();
     // use the first non-localhost IPv4 address
     for (int i = 0; i < ipAddressesList.size(); ++i) {
         if (ipAddressesList.at(i) != QHostAddress::LocalHost &&
             ipAddressesList.at(i).toIPv4Address()) {
             ipAddress = ipAddressesList.at(i).toString();
             break;
         }
     }
     // if we did not find one, use IPv4 localhost
     if (ipAddress.isEmpty())
         ipAddress = QHostAddress(QHostAddress::LocalHost).toString();
     statusLabel->setText(tr("The server is running on\n\nIP: %1\nport: %2\n\n"
                             "Run the Fortune Client example now.")
                          .arg(ipAddress).arg(tcpServer->serverPort()));
 //! [1]
 }

 //! [4]
 void Server::sendFortune()
 {
 //! [5]
     QByteArray block;
     QDataStream out(&block, QIODevice::WriteOnly);
     out.setVersion(QDataStream::Qt_5_10);

     out << fortunes[QRandomGenerator::global()->bounded(fortunes.size())];
 //! [4] //! [7]

     QTcpSocket *clientConnection = tcpServer->nextPendingConnection();
     connect(clientConnection, &QAbstractSocket::disconnected,
             clientConnection, &QObject::deleteLater);
 //! [7] //! [8]

     clientConnection->write(block);
     clientConnection->disconnectFromHost();
 //! [5]
 }
 //! [8]
	/****************************************************************************
	**
	** Copyright (C) 2017 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 <QtCore>

	#include "server.h"

	Server::Server(QWidget *parent)
	: QDialog(parent)
	, statusLabel(new QLabel)
	{
	setWindowFlags(windowFlags() & ~Qt::WindowContextHelpButtonHint);
	statusLabel->setTextInteractionFlags(Qt::TextBrowserInteraction);

	QNetworkConfigurationManager manager;
	if (manager.capabilities() & QNetworkConfigurationManager::NetworkSessionRequired) {
	// Get saved network configuration
	QSettings settings(QSettings::UserScope, QLatin1String("QtProject"));
	settings.beginGroup(QLatin1String("QtNetwork"));
	const QString id = settings.value(QLatin1String("DefaultNetworkConfiguration")).toString();
	settings.endGroup();

	// If the saved network configuration is not currently discovered use the system default
	QNetworkConfiguration config = manager.configurationFromIdentifier(id);
	if ((config.state() & QNetworkConfiguration::Discovered) !=
	QNetworkConfiguration::Discovered) {
	config = manager.defaultConfiguration();
	}

	networkSession = new QNetworkSession(config, this);
	connect(networkSession, &QNetworkSession::opened, this, &Server::sessionOpened);

	statusLabel->setText(tr("Opening network session."));
	networkSession->open();
	} else {
	sessionOpened();
	}

	//! [2]
	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.");
	//! [2]
	auto quitButton = new QPushButton(tr("Quit"));
	quitButton->setAutoDefault(false);
	connect(quitButton, &QAbstractButton::clicked, this, &QWidget::close);
	//! [3]
	connect(tcpServer, &QTcpServer::newConnection, this, &Server::sendFortune);
	//! [3]

	auto buttonLayout = new QHBoxLayout;
	buttonLayout->addStretch(1);
	buttonLayout->addWidget(quitButton);
	buttonLayout->addStretch(1);

	QVBoxLayout *mainLayout = nullptr;
	if (QGuiApplication::styleHints()->showIsFullScreen() \|\| QGuiApplication::styleHints()->showIsMaximized()) {
	auto outerVerticalLayout = new QVBoxLayout(this);
	outerVerticalLayout->addItem(new QSpacerItem(0, 0, QSizePolicy::Ignored, QSizePolicy::MinimumExpanding));
	auto outerHorizontalLayout = new QHBoxLayout;
	outerHorizontalLayout->addItem(new QSpacerItem(0, 0, QSizePolicy::MinimumExpanding, QSizePolicy::Ignored));
	auto groupBox = new QGroupBox(QGuiApplication::applicationDisplayName());
	mainLayout = new QVBoxLayout(groupBox);
	outerHorizontalLayout->addWidget(groupBox);
	outerHorizontalLayout->addItem(new QSpacerItem(0, 0, QSizePolicy::MinimumExpanding, QSizePolicy::Ignored));
	outerVerticalLayout->addLayout(outerHorizontalLayout);
	outerVerticalLayout->addItem(new QSpacerItem(0, 0, QSizePolicy::Ignored, QSizePolicy::MinimumExpanding));
	} else {
	mainLayout = new QVBoxLayout(this);
	}

	mainLayout->addWidget(statusLabel);
	mainLayout->addLayout(buttonLayout);

	setWindowTitle(QGuiApplication::applicationDisplayName());
	}

	void Server::sessionOpened()
	{
	// Save the used configuration
	if (networkSession) {
	QNetworkConfiguration config = networkSession->configuration();
	QString id;
	if (config.type() == QNetworkConfiguration::UserChoice)
	id = networkSession->sessionProperty(QLatin1String("UserChoiceConfiguration")).toString();
	else
	id = config.identifier();

	QSettings settings(QSettings::UserScope, QLatin1String("QtProject"));
	settings.beginGroup(QLatin1String("QtNetwork"));
	settings.setValue(QLatin1String("DefaultNetworkConfiguration"), id);
	settings.endGroup();
	}

	//! [0] //! [1]
	tcpServer = new QTcpServer(this);
	if (!tcpServer->listen()) {
	QMessageBox::critical(this, tr("Fortune Server"),
	tr("Unable to start the server: %1.")
	.arg(tcpServer->errorString()));
	close();
	return;
	}
	//! [0]
	QString ipAddress;
	QList<QHostAddress> ipAddressesList = QNetworkInterface::allAddresses();
	// use the first non-localhost IPv4 address
	for (int i = 0; i < ipAddressesList.size(); ++i) {
	if (ipAddressesList.at(i) != QHostAddress::LocalHost &&
	ipAddressesList.at(i).toIPv4Address()) {
	ipAddress = ipAddressesList.at(i).toString();
	break;
	}
	}
	// if we did not find one, use IPv4 localhost
	if (ipAddress.isEmpty())
	ipAddress = QHostAddress(QHostAddress::LocalHost).toString();
	statusLabel->setText(tr("The server is running on\n\nIP: %1\nport: %2\n\n"
	"Run the Fortune Client example now.")
	.arg(ipAddress).arg(tcpServer->serverPort()));
	//! [1]
	}

	//! [4]
	void Server::sendFortune()
	{
	//! [5]
	QByteArray block;
	QDataStream out(&block, QIODevice::WriteOnly);
	out.setVersion(QDataStream::Qt_5_10);

	out << fortunes[QRandomGenerator::global()->bounded(fortunes.size())];
	//! [4] //! [7]

	QTcpSocket *clientConnection = tcpServer->nextPendingConnection();
	connect(clientConnection, &QAbstractSocket::disconnected,
	clientConnection, &QObject::deleteLater);
	//! [7] //! [8]

	clientConnection->write(block);
	clientConnection->disconnectFromHost();
	//! [5]
	}
	//! [8]