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authorLoïc Collignon <loic.collignon@iot.bzh>2018-04-17 15:27:14 +0200
committerRomain Forlot <romain.forlot@iot.bzh>2018-12-13 14:12:02 +0100
commitc4adbcb905dc37e4d8773cea6a77cbec3e1a02f8 (patch)
treedfb8543e9e6d5eca20bb4a5341a15217f61ed016 /qafbwebsocketclient.cpp
parentb5f3b51d749c821f8776b1437faed5277c410c63 (diff)
Added a Qt's websocket client to AFB into helpers
This add a single Qt class to serve as a client to Application Framework Binder. It's optional, not enabled by default. To enable you have to set AFB_HELPERS_QTWSCLIENT to ON. Change-Id: Ia0759a95688e48183e6661082693c410a575b14b Signed-off-by: Loïc Collignon <loic.collignon@iot.bzh>
Diffstat (limited to 'qafbwebsocketclient.cpp')
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1 files changed, 173 insertions, 0 deletions
diff --git a/qafbwebsocketclient.cpp b/qafbwebsocketclient.cpp
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+/*
+ * Copyright (C) 2018 Iot.Bzh
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "qafbwebsocketclient.h"
+#include <QJsonDocument>
+#include <QJsonArray>
+#include <QJsonObject>
+
+/*!
+ * \brief Default constructor.
+ * \param parent Parent object.
+ */
+QAfbWebsocketClient::QAfbWebsocketClient(QObject* parent)
+ : QObject{parent}
+ , m_nextCallId{0}
+{
+ connect(&m_socket, SIGNAL(connected()), this, SLOT(onSocketConnected()));
+ connect(&m_socket, SIGNAL(disconnected()), this, SLOT(onSocketDisconnected()));
+ connect(&m_socket, SIGNAL(error(QAbstractSocket::SocketError)), this, SLOT(onSocketError(QAbstractSocket::SocketError)));
+ connect(&m_socket, SIGNAL(textMessageReceived(QString)), this, SLOT(onSocketTextReceived(QString)));
+}
+
+/*!
+ * \brief Get last error code.
+ * \return Return the last error code.
+ */
+QAbstractSocket::SocketError QAfbWebsocketClient::error() const
+{
+ return m_socket.error();
+}
+
+/*!
+ * \brief Get last error as a string.
+ * \return Return the last error as a string.
+ */
+QString QAfbWebsocketClient::errorString() const
+{
+ return m_socket.errorString();
+}
+
+/*!
+ * \brief Check if connection is ready or not.
+ * \return Return \c true if the connected is ready to read and write, \c false otherwise.
+ */
+bool QAfbWebsocketClient::isValid() const
+{
+ return m_socket.isValid();
+}
+/*!
+ * \brief Open the connection.
+ * \param u Url to connect to.
+ */
+void QAfbWebsocketClient::open(const QUrl& u)
+{
+ m_socket.open(u);
+}
+
+/*!
+ * \brief Close the connection.
+ */
+void QAfbWebsocketClient::close()
+{
+ m_socket.close();
+}
+
+/*!
+ * \brief Call an api's verb with an argument.
+ * \param api Api to call.
+ * \param verb Verb to call.
+ * \param arg Argument to pass.
+ */
+void QAfbWebsocketClient::call(const QString& api, const QString& verb, const QJsonValue& arg, closure_t closure)
+{
+ QString callId = QString::number(m_nextCallId);
+ m_closures[callId] = closure;
+
+ QJsonArray msg;
+ msg.append(2); // Call
+ msg.append(callId);
+ msg.append(api + "/" + verb);
+ msg.append(arg);
+
+ m_nextCallId++;
+
+ QJsonDocument value;
+ value.setArray(msg);
+
+ sendTextMessage(value.toJson(QJsonDocument::Compact));
+}
+
+/*!
+ * \brief Send a text message over the websocket.
+ * \param msg Message to send.
+ * This is use for test only, you should not use this method as
+ * it sent text as-is, so you have to follow the binder's
+ * protocol by your self.
+ */
+void QAfbWebsocketClient::sendTextMessage(QString msg)
+{
+ m_socket.sendTextMessage(msg);
+ qDebug() << "WebSocket Text Sent: " << msg;
+ emit textSent(msg);
+}
+
+/*!
+ * \brief Called when socket signals to be connected.
+ */
+void QAfbWebsocketClient::onSocketConnected()
+{
+ emit connected();
+}
+
+/*!
+ * \brief Called when socket signals to be disconnected.
+ */
+void QAfbWebsocketClient::onSocketDisconnected()
+{
+ emit disconnected();
+}
+
+/*!
+ * \brief Called when socket signals an error.
+ * \param e Error code.
+ */
+void QAfbWebsocketClient::onSocketError(QAbstractSocket::SocketError e)
+{
+ emit error(e);
+}
+
+/*!
+ * \brief Called when socket signals a received text.
+ * \param msg Message received.
+ */
+void QAfbWebsocketClient::onSocketTextReceived(QString msg)
+{
+ emit textReceived(msg);
+ qDebug() << "WebSocket Text Received: " << msg;
+
+ QJsonDocument doc = QJsonDocument::fromJson(msg.toUtf8());
+ QJsonArray arr = doc.array();
+
+ switch(arr[0].toInt())
+ {
+ case 3: // RetOK
+ case 4: // RetErr
+ {
+ auto it = m_closures.find(arr[1].toString());
+ if (it != m_closures.end())
+ {
+ closure_t closure = *it;
+ m_closures.erase(it);
+ closure(arr[0].toInt() == 3, arr[2]);
+ }
+ break;
+ }
+ case 5: // Events
+ emit event(arr[1].toString(), arr[2].toObject()["data"]);
+ break;
+ }
+}