QTcpServer使用示例-QT开发中文网

下面是一个简单的使用 QTcpServer 的示例代码：

#include <QtNetwork/QTcpServer>
#include <QtNetwork/QTcpSocket>

class MyTcpServer : public QTcpServer
{
    Q_OBJECT

public:
    explicit MyTcpServer(QObject *parent = nullptr) : QTcpServer(parent) {}

protected:
    void incomingConnection(qintptr socketDescriptor) override
    {
        // 创建新的 socket 连接
        QTcpSocket *socket = new QTcpSocket(this);
        
        // 将连接的 socket 设置为已有的 socket 描述符
        if (!socket->setSocketDescriptor(socketDescriptor)) {
            // 错误处理...
            delete socket;
            return;
        }
        
        // 处理新连接
        connect(socket, &QTcpSocket::readyRead, this, &MyTcpServer::onReadyRead);
        connect(socket, &QTcpSocket::disconnected, this, &MyTcpServer::onDisconnected);
        
        qDebug() << "New client connected:" << socket->peerAddress().toString();
    }

private slots:
    void onReadyRead()
    {
        // 读取数据并进行处理
        QTcpSocket *socket = qobject_cast<QTcpSocket *>(sender());
        
        QByteArray data = socket->readAll();
        
        // 处理数据...
        
        qDebug() << "Received data from client:" << data;
    }

    void onDisconnected()
    {
       // 处理断开连接事件
       QTcpSocket *socket = qobject_cast<QTcpSocket *>(sender());

       qDebug() << "Client disconnected:" << socket->peerAddress().toString();

       // 清理资源...
       
       socket->deleteLater();
   }
};

int main(int argc, char *argv[])
{
   QCoreApplication a(argc, argv);
   
   MyTcpServer server;
   if (!server.listen(QHostAddress::Any, 1234)) {
       qDebug() << "Failed to start server:" << server.errorString();
       return -1;
   }
   
   qDebug() << "Server started. Listening on port" << server.serverPort();

   return a.exec();
}

这个示例代码演示了如何创建一个简单的 TCP 服务器，并接收来自客户端的连接，读取数据并进行处理。你可以根据需要进行进一步的功能扩展和修改。

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