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// Copyright (C) 2016 Kurt Pattyn <pattyn.kurt@gmail.com>.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include "sslechoserver.h"
#include "QtWebSockets/QWebSocketServer"
#include "QtWebSockets/QWebSocket"
#include <QtCore/QDebug>
#include <QtCore/QFile>
#include <QtNetwork/QSslCertificate>
#include <QtNetwork/QSslKey>

QT_USE_NAMESPACE

//! [constructor]
SslEchoServer::SslEchoServer(quint16 port, QObject *parent) :
    QObject(parent),
    m_pWebSocketServer(nullptr)
{
    m_pWebSocketServer = new QWebSocketServer(QStringLiteral("SSL Echo Server"),
                                              QWebSocketServer::SecureMode,
                                              this);
    QSslConfiguration sslConfiguration;
    QFile certFile(QStringLiteral(":/localhost.cert"));
    QFile keyFile(QStringLiteral(":/localhost.key"));
    certFile.open(QIODevice::ReadOnly);
    keyFile.open(QIODevice::ReadOnly);
    QSslCertificate certificate(&certFile, QSsl::Pem);
    QSslKey sslKey(&keyFile, QSsl::Rsa, QSsl::Pem);
    certFile.close();
    keyFile.close();
    sslConfiguration.setPeerVerifyMode(QSslSocket::VerifyNone);
    sslConfiguration.setLocalCertificate(certificate);
    sslConfiguration.setPrivateKey(sslKey);
    m_pWebSocketServer->setSslConfiguration(sslConfiguration);

    if (m_pWebSocketServer->listen(QHostAddress::Any, port))
    {
        qDebug() << "SSL Echo Server listening on port" << port;
        connect(m_pWebSocketServer, &QWebSocketServer::newConnection,
                this, &SslEchoServer::onNewConnection);
        connect(m_pWebSocketServer, &QWebSocketServer::sslErrors,
                this, &SslEchoServer::onSslErrors);
    }
}
//! [constructor]

SslEchoServer::~SslEchoServer()
{
    m_pWebSocketServer->close();
    qDeleteAll(m_clients.begin(), m_clients.end());
}

//! [onNewConnection]
void SslEchoServer::onNewConnection()
{
    QWebSocket *pSocket = m_pWebSocketServer->nextPendingConnection();

    qDebug() << "Client connected:" << pSocket->peerName() << pSocket->origin();

    connect(pSocket, &QWebSocket::textMessageReceived, this, &SslEchoServer::processTextMessage);
    connect(pSocket, &QWebSocket::binaryMessageReceived,
            this, &SslEchoServer::processBinaryMessage);
    connect(pSocket, &QWebSocket::disconnected, this, &SslEchoServer::socketDisconnected);

    m_clients << pSocket;
}
//! [onNewConnection]

//! [processTextMessage]
void SslEchoServer::processTextMessage(QString message)
{
    QWebSocket *pClient = qobject_cast<QWebSocket *>(sender());
    if (pClient)
    {
        pClient->sendTextMessage(message);
    }
}
//! [processTextMessage]

//! [processBinaryMessage]
void SslEchoServer::processBinaryMessage(QByteArray message)
{
    QWebSocket *pClient = qobject_cast<QWebSocket *>(sender());
    if (pClient)
    {
        pClient->sendBinaryMessage(message);
    }
}
//! [processBinaryMessage]

//! [socketDisconnected]
void SslEchoServer::socketDisconnected()
{
    qDebug() << "Client disconnected";
    QWebSocket *pClient = qobject_cast<QWebSocket *>(sender());
    if (pClient)
    {
        m_clients.removeAll(pClient);
        pClient->deleteLater();
    }
}

void SslEchoServer::onSslErrors(const QList<QSslError> &)
{
    qDebug() << "Ssl errors occurred";
}
//! [socketDisconnected]