Qt实现websocket通信——服务端_qt websocket 服务端-优快云博客

本文链接：https://blog.youkuaiyun.com/liuwuyi1987/article/details/124741647

这是一个使用Qt库实现的WebSocket服务器，它监听本地8088端口，接收并处理新的连接，当有文本或二进制消息接收到时，会发出信号。在发生错误时，服务器会打印错误信息。

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1、头文件

#ifndef WEBSOCKETSERVER_H
#define WEBSOCKETSERVER_H

#include <QObject>
#include <QWebSocketServer>
#include <QWebSocket>

class WebSocketServer : public QObject
{
    Q_OBJECT
public:
    explicit WebSocketServer(QObject *parent = nullptr);
    ~WebSocketServer();

signals:
    void msgReceived(const QString &msg);

private slots:
    void onNewConnection(void);
    void onDisconnected(void);
    void onErrorOccurred(QAbstractSocket::SocketError socketError);

private:
    QWebSocket * m_socket;
    QWebSocketServer * m_server;
};

#endif // WEBSOCKETSERVER_H

2、源码文件

#include "websocketserver.h"
#include <QHostAddress>

WebSocketServer::WebSocketServer(QObject *parent)
    : QObject{parent}
{
    m_socket = nullptr;
    m_server = new QWebSocketServer("server", QWebSocketServer::NonSecureMode, this);
    if(m_server->listen(QHostAddress::LocalHost, 8088))
    {
        connect(m_server, &QWebSocketServer::newConnection, this, &WebSocketServer::onNewConnection);
    }
}

WebSocketServer::~WebSocketServer()
{
    onDisconnected();
    if(nullptr != m_server)
    {
        m_server->disconnect();
        m_server->close();
        delete m_server;
        m_server = nullptr;
    }
}

void WebSocketServer::onNewConnection(void)
{
    if(nullptr != m_server)
    {
        onDisconnected();
        m_socket = m_server->nextPendingConnection();
        if(nullptr != m_socket)
        {
            connect(m_socket, &QWebSocket::disconnected, this, &WebSocketServer::onDisconnected);
            connect(m_socket, &QWebSocket::textMessageReceived, this, [=](const QString &msg){
                emit msgReceived(msg);
            });
            connect(m_socket, &QWebSocket::binaryMessageReceived, this, [=](const QByteArray &msg){
                emit msgReceived(msg);
            });
            connect(m_socket, SIGNAL(error(QAbstractSocket::SocketError)), this, SLOT(onErrorOccurred(QAbstractSocket::SocketError)));
        }
    }
}

void WebSocketServer::onDisconnected()
{
    if(nullptr != m_socket)
    {
        m_socket->disconnect();
        delete m_socket;
        m_socket = nullptr;
    }
}

void WebSocketServer::onErrorOccurred(QAbstractSocket::SocketError socketError)
{
    qDebug()<<QString("Websocketserver error(%1): ").arg(socketError)<<m_socket->errorString();
}