Collin Kidder
ee287eac4b
library that I was able to integrate into the codebase so there aren't any external dependencies. Both external projects have their own open source licenses. Those licenses are included. Also in this commit is some preliminary work to start adding MQTT support to SavvyCAN.
118 lines
4.0 KiB
C++
118 lines
4.0 KiB
C++
/*
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* qmqtt_router.cpp - qmqtt router
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*
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* Copyright (c) 2013 Ery Lee <ery.lee at gmail dot com>
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* Router added by Niklas Wulf <nwulf at geenen-it-systeme dot de>
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* All rights reserved.
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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 met:
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*
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* * Redistributions of source code must retain the above copyright notice,
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* 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 the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of mqttc nor the names of its contributors may be used
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* to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include "qmqtt_routesubscription.h"
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#include "qmqtt_router.h"
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#include "qmqtt_client.h"
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#include "qmqtt_routedmessage.h"
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#include <QLoggingCategory>
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#include <QLatin1String>
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#include <QLatin1Char>
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#include <QRegularExpressionMatch>
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#include <QStringList>
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namespace QMQTT {
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Q_LOGGING_CATEGORY(routerSubscription, "qmqtt.routersubscription")
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RouteSubscription::RouteSubscription(Router *parent)
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: QObject(parent),
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_client(parent->client())
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{
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Q_ASSERT(!_client.isNull());
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}
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RouteSubscription::~RouteSubscription()
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{
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if (Q_LIKELY(!_client.isNull() && _client->isConnectedToHost()))
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_client->unsubscribe(_topic);
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}
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QString RouteSubscription::route() const
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{
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return _topic;
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}
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void RouteSubscription::setRoute(const QString &route)
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{
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QRegularExpression parameterNamesRegExp(QStringLiteral("\\:([a-zA-Z0-9]+)")); // note how names must not contain dashes or underscores
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// Remove paramter names to get the actual topic "route"
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QString topic = route;
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topic.remove(parameterNamesRegExp);
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// Remove the MQTT wildcards to get a regular expression, which matches the parameters
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QString parameterRegExp = route;
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parameterRegExp
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.remove(QLatin1Char('+'))
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.replace(parameterNamesRegExp, QStringLiteral("([a-zA-Z0-9_-]+)")) // note how parameter values may contain dashes or underscores
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.remove(QLatin1Char('#'))
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.replace(QLatin1String("$"), QLatin1String("\\$"));
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// Extract the parameter names
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QRegularExpressionMatchIterator it = parameterNamesRegExp.globalMatch(route);
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QStringList names;
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while(it.hasNext()) {
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QRegularExpressionMatch match = it.next();
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QString parameterName = match.captured(1);
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names << parameterName;
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}
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_topic = topic;
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_parameterNames = names;
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_regularExpression = QRegularExpression(parameterRegExp);
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}
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void RouteSubscription::routeMessage(const Message &message)
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{
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QString topic = message.topic();
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QRegularExpressionMatch match = _regularExpression.match(topic);
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if(!match.hasMatch()) {
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return;
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}
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RoutedMessage routedMessage(message);
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for(int i = 0, c = _parameterNames.size(); i < c; ++i) {
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QString name = _parameterNames.at(i);
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QString value = match.captured(i + 1);
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routedMessage._parameters.insert(name, value);
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}
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emit received(routedMessage);
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}
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} // namespace QMQTT
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