262 lines
9.0 KiB
C++
262 lines
9.0 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
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** Contact: http://www.qt-project.org/legal
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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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** $QT_BEGIN_LICENSE:BSD$
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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 Digia Plc and its Subsidiary(-ies) nor the names
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** of its contributors may be used to endorse or promote products derived
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** from this software without specific prior written permission.
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**
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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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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include <QtWidgets>
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#include <QtNetwork>
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#include "client.h"
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//! [0]
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Client::Client(QWidget *parent)
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: QDialog(parent), networkSession(0)
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{
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//! [0]
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hostLabel = new QLabel(tr("&Server name:"));
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portLabel = new QLabel(tr("S&erver port:"));
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hostCombo = new QComboBox;
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hostCombo->setEditable(true);
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// find out name of this machine
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QString name = QHostInfo::localHostName();
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if (!name.isEmpty()) {
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hostCombo->addItem(name);
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QString domain = QHostInfo::localDomainName();
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if (!domain.isEmpty())
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hostCombo->addItem(name + QChar('.') + domain);
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}
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if (name != QString("localhost"))
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hostCombo->addItem(QString("localhost"));
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// find out IP addresses of this machine
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QList<QHostAddress> ipAddressesList = QNetworkInterface::allAddresses();
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// add non-localhost addresses
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for (int i = 0; i < ipAddressesList.size(); ++i) {
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if (!ipAddressesList.at(i).isLoopback())
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hostCombo->addItem(ipAddressesList.at(i).toString());
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}
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// add localhost addresses
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for (int i = 0; i < ipAddressesList.size(); ++i) {
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if (ipAddressesList.at(i).isLoopback())
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hostCombo->addItem(ipAddressesList.at(i).toString());
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}
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portLineEdit = new QLineEdit;
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portLineEdit->setValidator(new QIntValidator(1, 65535, this));
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hostLabel->setBuddy(hostCombo);
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portLabel->setBuddy(portLineEdit);
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statusLabel = new QLabel(tr("This examples requires that you run the "
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"Fortune Server example as well."));
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getFortuneButton = new QPushButton(tr("Get Fortune"));
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getFortuneButton->setDefault(true);
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getFortuneButton->setEnabled(false);
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quitButton = new QPushButton(tr("Quit"));
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buttonBox = new QDialogButtonBox;
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buttonBox->addButton(getFortuneButton, QDialogButtonBox::ActionRole);
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buttonBox->addButton(quitButton, QDialogButtonBox::RejectRole);
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//! [1]
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tcpSocket = new QTcpSocket(this);
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//! [1]
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connect(hostCombo, SIGNAL(editTextChanged(QString)),
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this, SLOT(enableGetFortuneButton()));
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connect(portLineEdit, SIGNAL(textChanged(QString)),
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this, SLOT(enableGetFortuneButton()));
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connect(getFortuneButton, SIGNAL(clicked()),
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this, SLOT(requestNewFortune()));
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connect(quitButton, SIGNAL(clicked()), this, SLOT(close()));
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//! [2] //! [3]
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connect(tcpSocket, SIGNAL(readyRead()), this, SLOT(readFortune()));
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//! [2] //! [4]
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connect(tcpSocket, SIGNAL(error(QAbstractSocket::SocketError)),
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//! [3]
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this, SLOT(displayError(QAbstractSocket::SocketError)));
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//! [4]
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QGridLayout *mainLayout = new QGridLayout;
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mainLayout->addWidget(hostLabel, 0, 0);
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mainLayout->addWidget(hostCombo, 0, 1);
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mainLayout->addWidget(portLabel, 1, 0);
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mainLayout->addWidget(portLineEdit, 1, 1);
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mainLayout->addWidget(statusLabel, 2, 0, 1, 2);
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mainLayout->addWidget(buttonBox, 3, 0, 1, 2);
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setLayout(mainLayout);
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setWindowTitle(tr("Fortune Client"));
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portLineEdit->setFocus();
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QNetworkConfigurationManager manager;
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if (manager.capabilities() & QNetworkConfigurationManager::NetworkSessionRequired) {
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// Get saved network configuration
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QSettings settings(QSettings::UserScope, QLatin1String("QtProject"));
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settings.beginGroup(QLatin1String("QtNetwork"));
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const QString id = settings.value(QLatin1String("DefaultNetworkConfiguration")).toString();
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settings.endGroup();
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// If the saved network configuration is not currently discovered use the system default
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QNetworkConfiguration config = manager.configurationFromIdentifier(id);
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if ((config.state() & QNetworkConfiguration::Discovered) !=
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QNetworkConfiguration::Discovered) {
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config = manager.defaultConfiguration();
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}
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networkSession = new QNetworkSession(config, this);
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connect(networkSession, SIGNAL(opened()), this, SLOT(sessionOpened()));
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getFortuneButton->setEnabled(false);
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statusLabel->setText(tr("Opening network session."));
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networkSession->open();
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}
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//! [5]
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}
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//! [5]
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//! [6]
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void Client::requestNewFortune()
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{
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getFortuneButton->setEnabled(false);
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blockSize = 0;
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tcpSocket->abort();
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//! [7]
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tcpSocket->connectToHost(hostCombo->currentText(),
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portLineEdit->text().toInt());
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//! [7]
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}
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//! [6]
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//! [8]
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void Client::readFortune()
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{
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//! [9]
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QDataStream in(tcpSocket);
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in.setVersion(QDataStream::Qt_4_0);
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if (blockSize == 0) {
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if (tcpSocket->bytesAvailable() < (int)sizeof(quint16))
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return;
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//! [8]
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//! [10]
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in >> blockSize;
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}
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if (tcpSocket->bytesAvailable() < blockSize)
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return;
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//! [10] //! [11]
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QString nextFortune;
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in >> nextFortune;
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if (nextFortune == currentFortune) {
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QTimer::singleShot(0, this, SLOT(requestNewFortune()));
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return;
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}
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//! [11]
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//! [12]
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currentFortune = nextFortune;
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//! [9]
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statusLabel->setText(currentFortune);
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getFortuneButton->setEnabled(true);
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}
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//! [12]
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//! [13]
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void Client::displayError(QAbstractSocket::SocketError socketError)
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{
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switch (socketError) {
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case QAbstractSocket::RemoteHostClosedError:
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break;
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case QAbstractSocket::HostNotFoundError:
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QMessageBox::information(this, tr("Fortune Client"),
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tr("The host was not found. Please check the "
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"host name and port settings."));
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break;
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case QAbstractSocket::ConnectionRefusedError:
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QMessageBox::information(this, tr("Fortune Client"),
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tr("The connection was refused by the peer. "
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"Make sure the fortune server is running, "
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"and check that the host name and port "
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"settings are correct."));
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break;
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default:
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QMessageBox::information(this, tr("Fortune Client"),
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tr("The following error occurred: %1.")
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.arg(tcpSocket->errorString()));
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}
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getFortuneButton->setEnabled(true);
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}
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//! [13]
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void Client::enableGetFortuneButton()
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{
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getFortuneButton->setEnabled((!networkSession || networkSession->isOpen()) &&
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!hostCombo->currentText().isEmpty() &&
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!portLineEdit->text().isEmpty());
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}
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void Client::sessionOpened()
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{
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// Save the used configuration
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QNetworkConfiguration config = networkSession->configuration();
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QString id;
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if (config.type() == QNetworkConfiguration::UserChoice)
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id = networkSession->sessionProperty(QLatin1String("UserChoiceConfiguration")).toString();
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else
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id = config.identifier();
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QSettings settings(QSettings::UserScope, QLatin1String("QtProject"));
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settings.beginGroup(QLatin1String("QtNetwork"));
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settings.setValue(QLatin1String("DefaultNetworkConfiguration"), id);
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settings.endGroup();
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statusLabel->setText(tr("This examples requires that you run the "
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"Fortune Server example as well."));
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enableGetFortuneButton();
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}
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