Console CoAP Client Example

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#include "coaphandler.h" #include <QDebug> #include <QLoggingCategory> #include <QCoapClient> #include <QCoapReply> #include <QCoapResourceDiscoveryReply> Q_LOGGING_CATEGORY(lcCoapClient, "qt.coap.client") CoapHandler::CoapHandler(QObject *parent) : QObject(parent) { connect(&m_coapClient, &QCoapClient::finished, this, &CoapHandler::onFinished); connect(&m_coapClient, &QCoapClient::error, this, &CoapHandler::onError); connect(&m_coapClient, &QCoapClient::responseToMulticastReceived, this, &CoapHandler::onResponseToMulticast); } bool CoapHandler::runGet(const QUrl &url) { return m_coapClient.get(url); } bool CoapHandler::runPost(const QUrl &url) { return; } bool CoapHandler::runPut(const QUrl &url) { return m_coapClient.put(url); } bool CoapHandler::runDelete(const QUrl &url) { return m_coapClient.deleteResource(url); } bool CoapHandler::runObserve(const QUrl &url) { QCoapReply *observeReply = m_coapClient.observe(url); if (!observeReply) return false; connect(observeReply, &QCoapReply::notified, this, &CoapHandler::onNotified); return true; } bool CoapHandler::runDiscover(const QUrl &url) { QCoapResourceDiscoveryReply *discoverReply =; if (!discoverReply) return false; connect(discoverReply, &QCoapResourceDiscoveryReply::discovered, this, &CoapHandler::onDiscovered); return true; } void CoapHandler::onFinished(QCoapReply *reply) { if (reply->errorReceived() == QtCoap::Error::Ok) qCInfo(lcCoapClient) << "Request finished with payload:" << reply->readAll(); else qCWarning(lcCoapClient, "Request failed"); // Don't forget to remove the reply reply->deleteLater(); } void CoapHandler::onNotified(QCoapReply *reply, QCoapMessage message) { Q_UNUSED(message) // You can alternatively use `message.payload();` qCInfo(lcCoapClient) << "Received Observe notification with payload:" << reply->readAll(); } void CoapHandler::onDiscovered(QCoapResourceDiscoveryReply *reply, QVector<QCoapResource> resources) { Q_UNUSED(reply) for (const QCoapResource &res : qAsConst(resources)) qCInfo(lcCoapClient) << "Discovered resource:" << res.path() << res.title(); } void CoapHandler::onResponseToMulticast(QCoapReply *reply, const QCoapMessage& message, const QHostAddress &sender) { if (reply->errorReceived() == QtCoap::Error::Ok) qCInfo(lcCoapClient) << "Got a response for multicast request from:" << sender.toString() << "with payload:" << message.payload(); else qCWarning(lcCoapClient, "Multicast request failed"); } void CoapHandler::onError(QCoapReply *reply, QtCoap::Error error) { if (reply) qCInfo(lcCoapClient) << "CoAP reply error:" << reply->errorString(); else qCWarning(lcCoapClient) << "CoAP error:" << error; }