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f5d0032d76
Other solutions provide minimal console applications for publishing and subscribing, which can then be used as tools. Task-number: QTBUG-69995 Task-number: QTBUG-71957 Change-Id: Ica4a856e25b540d089e1aa20f853b780c18d59dd Reviewed-by: hjk <hjk@qt.io>
113 lines
4.4 KiB
C++
113 lines
4.4 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2018 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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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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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** BSD License Usage
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** Alternatively, you may use this file under the terms of the BSD license
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** 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 The Qt Company Ltd nor the names of its
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** 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 "configuration.h"
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#include <QCoreApplication>
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#include <QMqttClient>
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#include <QSslSocket>
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#include <QTimer>
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int main(int argc, char *argv[])
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{
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QCoreApplication a(argc, argv);
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QCoreApplication::setApplicationName(QStringLiteral("qtmqtt_sub"));
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QCoreApplication::setApplicationVersion(QStringLiteral("1.0"));
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// Create the client
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Configuration description;
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auto *client = createClientWithConfiguration(&a, &description, false);
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if (!client)
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return -1;
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a.connect(client, &QMqttClient::errorChanged, [&client](const QMqttClient::ClientError e) {
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if (e == QMqttClient::NoError)
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return;
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qWarning() << "Error Occurred:" << e << " Client state:" << client->state();
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client->disconnectFromHost();
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});
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a.connect(client, &QMqttClient::stateChanged, [&client] (QMqttClient::ClientState s) {
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if (s == QMqttClient::Disconnected) {
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client->deleteLater();
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qApp->quit();
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}
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});
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a.connect(client, &QMqttClient::connected, [&client, description]() {
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auto sub = client->subscribe(description.topic, description.qos);
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client->connect(sub, &QMqttSubscription::stateChanged, [&client](QMqttSubscription::SubscriptionState s) {
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qInfo() << "Subscription state:" << s;
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if (s == QMqttSubscription::Unsubscribed)
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client->disconnectFromHost();
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});
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client->connect(sub, &QMqttSubscription::messageReceived, [](const QMqttMessage &msg) {
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qInfo() << "ID:" << msg.id()
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<< "Topic:" << msg.topic().name()
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<< "QoS:" << msg.qos()
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<< "Retain:" << msg.retain()
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<< "Duplicate:" << msg.duplicate()
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<< "Payload:" << msg.payload().left(50) << (msg.payload().size() > 50 ? "..." : "");
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});
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});
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#ifndef QT_NO_SSL
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if (description.useEncryption)
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client->connectToHostEncrypted();
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else
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#endif
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client->connectToHost();
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return a.exec();
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}
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