Qt websocket

1.pro  添加

QT += websockets

#ifndef MYWEBSOCKETSERVER_H
#define MYWEBSOCKETSERVER_H

#include <QObject>
#include <QtWebSockets/QWebSocket>
#include <QtWebSockets/QWebSocketServer>
#include <QList>
#include <QByteArray>

class MyWebSocketServer : public QObject
{
    Q_OBJECT
public:
    explicit MyWebSocketServer(quint16 port, bool debug = false, QObject *parent = nullptr);
    ~MyWebSocketServer();
signals:
    void closed();
public slots:
    void onNewConnection();
    void processTextMessage(QString message);
    void processBinaryMessage(QByteArray message);
    void socketDisconnected();
private:
    QWebSocketServer *m_pWebSocketServer;
    QList<QWebSocket *> m_clients;
    bool m_debug;
};

#endif // MYWEBSOCKETSERVER_H

#include "mywebsocketserver.h"
//! [constructor]
MyWebSocketServer::MyWebSocketServer(quint16 port, bool debug, QObject *parent) :
    QObject(parent),
    m_pWebSocketServer(new QWebSocketServer(QStringLiteral("Echo Server"),
                                            QWebSocketServer::NonSecureMode, this)),
    m_debug(debug)
{
    if (m_pWebSocketServer->listen(QHostAddress::Any, port)) {
        if (m_debug)
            qDebug() << "websocket server listening on port" << port;
        connect(m_pWebSocketServer, &QWebSocketServer::newConnection,
                this, &MyWebSocketServer::onNewConnection);
        connect(m_pWebSocketServer, &QWebSocketServer::closed, this, &MyWebSocketServer::closed);
    }
}
//! [constructor]

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

//! [onNewConnection]
void MyWebSocketServer::onNewConnection()
{

    QWebSocket *pSocket = m_pWebSocketServer->nextPendingConnection();
    qDebug() << "onNewConnection:"<<pSocket->peerAddress();

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

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

//! [processTextMessage]
void MyWebSocketServer::processTextMessage(QString message)
{
  //  QWebSocket *pClient = qobject_cast<QWebSocket *>(sender());

//    qDebug() <<pClient;
//    if (m_debug)
//        qDebug() << "Message received:" << message;
//    if (pClient) {
//         qDebug() << "sendTextMessage:" << message;
//        pClient->sendTextMessage(message);
//    }

    if(m_clients.count ()>){
        qDebug() << "sendTextMessage:" << message;
        m_clients.at(m_clients.count()-)->sendTextMessage (message);
    }

}
//! [processTextMessage]

//! [processBinaryMessage]
void MyWebSocketServer::processBinaryMessage(QByteArray message)
{
    QWebSocket *pClient = qobject_cast<QWebSocket *>(sender());
    if (m_debug)
        qDebug() << "Binary Message received:" << message;
    if (pClient) {
        pClient->sendBinaryMessage(message);
    }
}
//! [processBinaryMessage]

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