websocket

add ping pong to simbase, mainwindow and websocket wrapper

Qt/web_socket_wrapper.cpp

@@ -3,10 +3,20 @@
 
 Web_socket_wrapper::Web_socket_wrapper(const QUrl &url, QObject *parent) :
       QObject(parent),
-      m_web_socket(new QWebSocket("", QWebSocketProtocol::VersionLatest, this))
+      m_web_socket(new QWebSocket("", QWebSocketProtocol::VersionLatest, this)),
+      m_ping_timer(new QTimer(this)),
+      m_pong_timer(new QTimer(this))
 {
     connect(m_web_socket, &QWebSocket::connected, this, &Web_socket_wrapper::m_on_connected);
     connect(m_web_socket, &QWebSocket::disconnected, this, &Web_socket_wrapper::on_closed);
+    connect(m_web_socket, &QWebSocket::pong, this, &Web_socket_wrapper::m_on_pong);
+    connect(m_ping_timer, &QTimer::timeout, this, [=]{
+        m_web_socket->ping();
+        m_pong_timer->start(500);
+    });
+    connect(m_pong_timer, &QTimer::timeout, this, &Web_socket_wrapper::m_on_pong_timeout);
+    m_ping_timer->setSingleShot(true);
+    m_pong_timer->setSingleShot(true);
     m_web_socket->open(url);
 }
 
@@ -111,6 +121,9 @@ void Web_socket_wrapper::m_on_connected()
     m_connected = true;
     connect(m_web_socket, &QWebSocket::textMessageReceived,
             this, &Web_socket_wrapper::m_on_received);
+
+    m_ping_timer->start(1000);
+
     emit on_connected();
 }
 
@@ -128,3 +141,22 @@ void Web_socket_wrapper::m_on_received(QString message)
         return;
     }
 }
+
+void Web_socket_wrapper::m_on_pong(quint64 elapsedTime)
+{
+    if (elapsedTime > 500)
+    {
+        m_web_socket->close();
+        emit on_closed();
+    }
+
+    m_pong_timer->stop();
+    m_ping_timer->start(1000);
+}
+
+void Web_socket_wrapper::m_on_pong_timeout()
+{
+    qDebug() << "Pong timeout";
+    m_web_socket->close();
+    emit on_closed();
+}