| 1 | /****************************************************************************
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| 2 | **
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| 3 | ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
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| 4 | ** All rights reserved.
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| 5 | ** Contact: Nokia Corporation ([email protected])
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| 6 | **
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| 7 | ** This file is part of the examples of the Qt Toolkit.
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| 8 | **
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| 9 | ** $QT_BEGIN_LICENSE:BSD$
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| 10 | ** You may use this file under the terms of the BSD license as follows:
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| 11 | **
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| 12 | ** "Redistribution and use in source and binary forms, with or without
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| 13 | ** modification, are permitted provided that the following conditions are
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| 14 | ** met:
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| 15 | ** * Redistributions of source code must retain the above copyright
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| 16 | ** notice, this list of conditions and the following disclaimer.
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| 17 | ** * Redistributions in binary form must reproduce the above copyright
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| 18 | ** notice, this list of conditions and the following disclaimer in
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| 19 | ** the documentation and/or other materials provided with the
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| 20 | ** distribution.
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| 21 | ** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
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| 22 | ** the names of its contributors may be used to endorse or promote
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| 23 | ** products derived from this software without specific prior written
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| 24 | ** permission.
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| 25 | **
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| 26 | ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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| 27 | ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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| 28 | ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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| 29 | ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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| 30 | ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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| 31 | ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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| 32 | ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 33 | ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 34 | ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 35 | ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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| 36 | ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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| 37 | ** $QT_END_LICENSE$
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| 38 | **
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| 39 | ****************************************************************************/
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| 40 |
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| 41 | #include <QtGui>
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| 42 | #include <QtNetwork>
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| 43 |
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| 44 | #include "client.h"
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| 45 |
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| 46 | //! [0]
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| 47 | Client::Client(QWidget *parent)
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| 48 | : QDialog(parent), networkSession(0)
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| 49 | {
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| 50 | //! [0]
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| 51 | hostLabel = new QLabel(tr("&Server name:"));
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| 52 | portLabel = new QLabel(tr("S&erver port:"));
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| 53 |
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| 54 | // find out which IP to connect to
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| 55 | QString ipAddress;
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| 56 | QList<QHostAddress> ipAddressesList = QNetworkInterface::allAddresses();
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| 57 | // use the first non-localhost IPv4 address
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| 58 | for (int i = 0; i < ipAddressesList.size(); ++i) {
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| 59 | if (ipAddressesList.at(i) != QHostAddress::LocalHost &&
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| 60 | ipAddressesList.at(i).toIPv4Address()) {
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| 61 | ipAddress = ipAddressesList.at(i).toString();
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| 62 | break;
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| 63 | }
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| 64 | }
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| 65 | // if we did not find one, use IPv4 localhost
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| 66 | if (ipAddress.isEmpty())
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| 67 | ipAddress = QHostAddress(QHostAddress::LocalHost).toString();
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| 68 |
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| 69 | hostLineEdit = new QLineEdit(ipAddress);
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| 70 | portLineEdit = new QLineEdit;
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| 71 | portLineEdit->setValidator(new QIntValidator(1, 65535, this));
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| 72 |
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| 73 | hostLabel->setBuddy(hostLineEdit);
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| 74 | portLabel->setBuddy(portLineEdit);
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| 75 |
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| 76 | statusLabel = new QLabel(tr("This examples requires that you run the "
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| 77 | "Fortune Server example as well."));
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| 78 |
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| 79 | getFortuneButton = new QPushButton(tr("Get Fortune"));
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| 80 | getFortuneButton->setDefault(true);
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| 81 | getFortuneButton->setEnabled(false);
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| 82 |
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| 83 | quitButton = new QPushButton(tr("Quit"));
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| 84 |
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| 85 | buttonBox = new QDialogButtonBox;
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| 86 | buttonBox->addButton(getFortuneButton, QDialogButtonBox::ActionRole);
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| 87 | buttonBox->addButton(quitButton, QDialogButtonBox::RejectRole);
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| 88 |
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| 89 | //! [1]
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| 90 | tcpSocket = new QTcpSocket(this);
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| 91 | //! [1]
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| 92 |
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| 93 | connect(hostLineEdit, SIGNAL(textChanged(QString)),
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| 94 | this, SLOT(enableGetFortuneButton()));
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| 95 | connect(portLineEdit, SIGNAL(textChanged(QString)),
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| 96 | this, SLOT(enableGetFortuneButton()));
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| 97 | connect(getFortuneButton, SIGNAL(clicked()),
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| 98 | this, SLOT(requestNewFortune()));
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| 99 | connect(quitButton, SIGNAL(clicked()), this, SLOT(close()));
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| 100 | //! [2] //! [3]
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| 101 | connect(tcpSocket, SIGNAL(readyRead()), this, SLOT(readFortune()));
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| 102 | //! [2] //! [4]
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| 103 | connect(tcpSocket, SIGNAL(error(QAbstractSocket::SocketError)),
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| 104 | //! [3]
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| 105 | this, SLOT(displayError(QAbstractSocket::SocketError)));
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| 106 | //! [4]
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| 107 |
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| 108 | QGridLayout *mainLayout = new QGridLayout;
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| 109 | mainLayout->addWidget(hostLabel, 0, 0);
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| 110 | mainLayout->addWidget(hostLineEdit, 0, 1);
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| 111 | mainLayout->addWidget(portLabel, 1, 0);
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| 112 | mainLayout->addWidget(portLineEdit, 1, 1);
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| 113 | mainLayout->addWidget(statusLabel, 2, 0, 1, 2);
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| 114 | mainLayout->addWidget(buttonBox, 3, 0, 1, 2);
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| 115 | setLayout(mainLayout);
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| 116 |
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| 117 | setWindowTitle(tr("Fortune Client"));
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| 118 | portLineEdit->setFocus();
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| 119 |
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| 120 | QNetworkConfigurationManager manager;
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| 121 | if (manager.capabilities() & QNetworkConfigurationManager::NetworkSessionRequired) {
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| 122 | // Get saved network configuration
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| 123 | QSettings settings(QSettings::UserScope, QLatin1String("Trolltech"));
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| 124 | settings.beginGroup(QLatin1String("QtNetwork"));
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| 125 | const QString id = settings.value(QLatin1String("DefaultNetworkConfiguration")).toString();
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| 126 | settings.endGroup();
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| 127 |
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| 128 | // If the saved network configuration is not currently discovered use the system default
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| 129 | QNetworkConfiguration config = manager.configurationFromIdentifier(id);
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| 130 | if ((config.state() & QNetworkConfiguration::Discovered) !=
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| 131 | QNetworkConfiguration::Discovered) {
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| 132 | config = manager.defaultConfiguration();
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| 133 | }
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| 134 |
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| 135 | networkSession = new QNetworkSession(config, this);
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| 136 | connect(networkSession, SIGNAL(opened()), this, SLOT(sessionOpened()));
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| 137 |
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| 138 | getFortuneButton->setEnabled(false);
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| 139 | statusLabel->setText(tr("Opening network session."));
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| 140 | networkSession->open();
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| 141 | }
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| 142 | //! [5]
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| 143 | }
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| 144 | //! [5]
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| 145 |
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| 146 | //! [6]
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| 147 | void Client::requestNewFortune()
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| 148 | {
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| 149 | getFortuneButton->setEnabled(false);
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| 150 | blockSize = 0;
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| 151 | tcpSocket->abort();
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| 152 | //! [7]
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| 153 | tcpSocket->connectToHost(hostLineEdit->text(),
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| 154 | portLineEdit->text().toInt());
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| 155 | //! [7]
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| 156 | }
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| 157 | //! [6]
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| 158 |
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| 159 | //! [8]
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| 160 | void Client::readFortune()
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| 161 | {
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| 162 | //! [9]
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| 163 | QDataStream in(tcpSocket);
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| 164 | in.setVersion(QDataStream::Qt_4_0);
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| 165 |
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| 166 | if (blockSize == 0) {
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| 167 | if (tcpSocket->bytesAvailable() < (int)sizeof(quint16))
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| 168 | return;
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| 169 | //! [8]
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| 170 |
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| 171 | //! [10]
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| 172 | in >> blockSize;
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| 173 | }
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| 174 |
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| 175 | if (tcpSocket->bytesAvailable() < blockSize)
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| 176 | return;
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| 177 | //! [10] //! [11]
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| 178 |
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| 179 | QString nextFortune;
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| 180 | in >> nextFortune;
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| 181 |
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| 182 | if (nextFortune == currentFortune) {
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| 183 | QTimer::singleShot(0, this, SLOT(requestNewFortune()));
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| 184 | return;
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| 185 | }
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| 186 | //! [11]
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| 187 |
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| 188 | //! [12]
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| 189 | currentFortune = nextFortune;
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| 190 | //! [9]
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| 191 | statusLabel->setText(currentFortune);
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| 192 | getFortuneButton->setEnabled(true);
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| 193 | }
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| 194 | //! [12]
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| 195 |
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| 196 | //! [13]
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| 197 | void Client::displayError(QAbstractSocket::SocketError socketError)
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| 198 | {
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| 199 | switch (socketError) {
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| 200 | case QAbstractSocket::RemoteHostClosedError:
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| 201 | break;
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| 202 | case QAbstractSocket::HostNotFoundError:
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| 203 | QMessageBox::information(this, tr("Fortune Client"),
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| 204 | tr("The host was not found. Please check the "
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| 205 | "host name and port settings."));
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| 206 | break;
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| 207 | case QAbstractSocket::ConnectionRefusedError:
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| 208 | QMessageBox::information(this, tr("Fortune Client"),
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| 209 | tr("The connection was refused by the peer. "
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| 210 | "Make sure the fortune server is running, "
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| 211 | "and check that the host name and port "
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| 212 | "settings are correct."));
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| 213 | break;
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| 214 | default:
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| 215 | QMessageBox::information(this, tr("Fortune Client"),
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| 216 | tr("The following error occurred: %1.")
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| 217 | .arg(tcpSocket->errorString()));
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| 218 | }
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| 219 |
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| 220 | getFortuneButton->setEnabled(true);
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| 221 | }
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| 222 | //! [13]
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| 223 |
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| 224 | void Client::enableGetFortuneButton()
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| 225 | {
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| 226 | getFortuneButton->setEnabled((!networkSession || networkSession->isOpen()) &&
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| 227 | !hostLineEdit->text().isEmpty() &&
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| 228 | !portLineEdit->text().isEmpty());
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| 229 |
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| 230 | }
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| 231 |
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| 232 | void Client::sessionOpened()
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| 233 | {
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| 234 | // Save the used configuration
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| 235 | QNetworkConfiguration config = networkSession->configuration();
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| 236 | QString id;
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| 237 | if (config.type() == QNetworkConfiguration::UserChoice)
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| 238 | id = networkSession->sessionProperty(QLatin1String("UserChoiceConfiguration")).toString();
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| 239 | else
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| 240 | id = config.identifier();
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| 241 |
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| 242 | QSettings settings(QSettings::UserScope, QLatin1String("Trolltech"));
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| 243 | settings.beginGroup(QLatin1String("QtNetwork"));
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| 244 | settings.setValue(QLatin1String("DefaultNetworkConfiguration"), id);
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| 245 | settings.endGroup();
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| 246 |
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| 247 | statusLabel->setText(tr("This examples requires that you run the "
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| 248 | "Fortune Server example as well."));
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| 249 |
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| 250 | enableGetFortuneButton();
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| 251 | }
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| 252 |
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