Qt实现Redis的类，可以订阅和发布-Go服务器开发

下面是一个使用Qt实现Redis的订阅和发布功能的简单示例代码：

#include <QtCore/QCoreApplication>
#include <QDebug>
#include <QTimer>
#include <QTcpSocket>

class RedisClient : public QObject
{
    Q_OBJECT
public:
    explicit RedisClient(QObject *parent = nullptr)
        : QObject(parent)
    {
        connect(&m_socket, &QTcpSocket::readyRead, this, &RedisClient::onReadyRead);
        connect(&m_socket, &QTcpSocket::connected, this, &RedisClient::onConnected);
    }

    void connectToServer(const QString& host = "localhost", int port = 6379)
    {
        m_socket.connectToHost(host, port);
    }

    void subscribe(const QString& channel)
    {
        sendCommand(QString("SUBSCRIBE %1").arg(channel));
    }

    void publish(const QString& channel, const QString& message)
    {
        sendCommand(QString("PUBLISH %1 %2").arg(channel).arg(message));
    }

signals:
    void messageReceived(const QString& channel, const QString& message);

private slots:
    void onConnected()
    {
        qDebug() << "Connected to Redis server.";
    }

    void onReadyRead()
    {
        QByteArray data = m_socket.readAll();
        
        // 解析收到的消息，根据协议规则处理不同类型的回复
        
        QList<QByteArray> replies = data.split('\n');
        
        for (int i = 0; i < replies.size(); i += 4) {
            if (replies.at(i) == "message") {
                QString channel = QString::fromUtf8(replies.at(i+1));
                QString message = QString::fromUtf8(replies.at(i+2));
                emit messageReceived(channel, message);
            }
        }
    }

private:
    void sendCommand(const QString& command)
    {
        QByteArray data = QString("*1\r\n$%1\r\n%2\r\n").arg(command.size()).arg(command).toUtf8();
        m_socket.write(data);
    }

private:
    QTcpSocket m_socket;
};

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);

    RedisClient redis;
    
    QObject::connect(&redis, &RedisClient::messageReceived, [](const QString& channel, const QString& message) {
        qDebug() << "Received message from" << channel << ":" << message;
    });
    
    redis.connectToServer();
    
    // 订阅频道
    redis.subscribe("channel");

    // 模拟发布消息
    QTimer timer;
    QObject::connect(&timer, &QTimer::timeout, [&redis]() {
        static int count = 0;
        QString message = QString("Message %1").arg(count++);
        redis.publish("channel", message);
        qDebug() << "Published:" << message;
    });
    
    timer.start(1000);

    return a.exec();
}

#include "main.moc"

这个示例使用QTcpSocket来与Redis服务器进行通信，并根据Redis协议规则解析收到的回复。你可以在main函数中订阅频道和发布消息。当接收到消息时，会发出messageReceived信号，你可以连接该信号并处理收到的消息。

请注意，这只是一个简单的示例，并没有考虑所有的异常情况和错误处理。在实际应用中，你可能需要更加完善和健壮的实现。

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