ServDisp/awebsocketserver.cpp at master · andrmor/ServDisp · GitHub

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#include "awebsocketserver.h"

#include <QWebSocketServer>
#include <QWebSocket>
#include <QDebug>
#include <QNetworkInterface>
#include <QJsonObject>
#include <QJsonDocument>

AWebSocketServer::AWebSocketServer(QObject *parent) :
    QObject(parent),
    server(new QWebSocketServer(QStringLiteral("Dispatcher for Ants2 server"), QWebSocketServer::NonSecureMode, this))
{
    connect(server, &QWebSocketServer::newConnection, this, &AWebSocketServer::onNewConnection, Qt::QueuedConnection);

    watchdog = new QTimer(this);
    watchdog->setSingleShot(true);
    watchdog->setInterval(watchdogInterval);
}

AWebSocketServer::~AWebSocketServer()
{
    server->close();
    server->deleteLater();
}

bool AWebSocketServer::StartListen(QHostAddress ip, quint16 port)
{
    qDebug() << "Attempting to start listening...";
    if ( !server->listen(ip, port) ) //QHostAddress::Any QHostAddress::AnyIPv4
    {
        QString s = QString("WebSocket server was unable to start listen on ip ") + ip.toString() + " and port " + QString::number(port);
        qCritical(s.toLatin1().data());
        exit(1);
    }

    qDebug() << "Dispatcher for ANTS2 server is listening.";
    qDebug() << "To connect use URL:" << GetUrl();
    qDebug() << "";

    return true;
}

bool AWebSocketServer::CanReply()
{
    if (client) return true;

    qDebug() << "AWebSocketSessionServer: cannot reply - connection not established";
    return false;
}

void AWebSocketServer::ReplyAndCloseConnection(const QJsonObject &json)
{
    QJsonDocument doc(json);
    QString reply(doc.toJson(QJsonDocument::Compact));
    ReplyAndCloseConnection(reply);
}

void AWebSocketServer::ReplyAndCloseConnection(const QString &message)
{
    if ( !CanReply() ) return;

    qDebug() << "Reply text message:"<<message;

    client->sendTextMessage(message);
    client->close();  //QWebSocketProtocol::CloseCodeNormal, "test");
}

void AWebSocketServer::onNewConnection()
{
    qDebug() << "New connection attempt";

    if (client)
    {
        //deny - exclusive connections!
        qDebug() << "Connection delayed: another client is already connected";
        //pSocket->sendTextMessage("{\"result\":false, \"error\":\"another session is not yet finished\"}");
        //pSocket->close();
        return;
    }

    client = server->nextPendingConnection();
    ProcessNewClient();
}

void AWebSocketServer::ProcessNewClient()
{
    qDebug() << "Connection established with" << client->peerAddress().toString();
    connect(client, &QWebSocket::textMessageReceived, this, &AWebSocketServer::onTextMessageReceived);
    connect(client, &QWebSocket::disconnected, this, &AWebSocketServer::onSocketDisconnected);

    client->sendTextMessage("{\"result\":true}");

    watchdog->start();
}

void AWebSocketServer::onTextMessageReceived(const QString &message)
{
    qDebug() << "Text message received:\n--->\n"<<message << "\n<---";

    if (message.isEmpty())
    {
        if (client)
            client->sendTextMessage("PONG"); //used for watchdogs
    }
    else
       emit textMessageReceived(message);
}

void AWebSocketServer::onSocketDisconnected()
{
    qDebug() << "Client disconnected!";

    if (client)
    {
        client->close();
        client->deleteLater();
    }
    client = 0;

    client = server->nextPendingConnection();
    if (client) ProcessNewClient();
}

void AWebSocketServer::onWatchdogTriggered()
{
    onSocketDisconnected();
}

const QString AWebSocketServer::GetUrl() const
{
    return server->serverUrl().toString();
}

int AWebSocketServer::GetPort() const
{
    return server->serverPort();
}