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/****************************************************************************
**
** Copyright (C) 2018 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 "configuration.h"
#include <QCoreApplication>
#include <QMqttClient>
#include <QSslSocket>
#include <QTimer>
int main(int argc, char *argv[])
{
QCoreApplication a(argc, argv);
QCoreApplication::setApplicationName(QStringLiteral("qtmqtt_sub"));
QCoreApplication::setApplicationVersion(QStringLiteral("1.0"));
// Create the client
Configuration description;
auto *client = createClientWithConfiguration(&a, &description, false);
if (!client)
return -1;
a.connect(client, &QMqttClient::errorChanged, [&client](const QMqttClient::ClientError e) {
if (e == QMqttClient::NoError)
return;
qWarning() << "Error Occurred:" << e << " Client state:" << client->state();
client->disconnectFromHost();
});
a.connect(client, &QMqttClient::stateChanged, [&client] (QMqttClient::ClientState s) {
if (s == QMqttClient::Disconnected) {
client->deleteLater();
qApp->quit();
}
});
a.connect(client, &QMqttClient::connected, [&client, description]() {
auto sub = client->subscribe(description.topic, description.qos);
client->connect(sub, &QMqttSubscription::stateChanged, [&client](QMqttSubscription::SubscriptionState s) {
qInfo() << "Subscription state:" << s;
if (s == QMqttSubscription::Unsubscribed)
client->disconnectFromHost();
});
client->connect(sub, &QMqttSubscription::messageReceived, [](const QMqttMessage &msg) {
qInfo() << "ID:" << msg.id()
<< "Topic:" << msg.topic().name()
<< "QoS:" << msg.qos()
<< "Retain:" << msg.retain()
<< "Duplicate:" << msg.duplicate()
<< "Payload:" << msg.payload().left(50) << (msg.payload().size() > 50 ? "..." : "");
});
});
#ifndef QT_NO_SSL
if (description.useEncryption)
client->connectToHostEncrypted();
else
#endif
client->connectToHost();
return a.exec();
}
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