用qt写一段代码实现两个上位机通过代理连接一个下位机,下位机收到命令后会发送的数据,发送的数据会在两台上位机上同时显示出来
时间: 2024-03-27 09:39:21 浏览: 107
好的,这是一个比较复杂的问题,需要涉及到网络编程和 GUI 编程,以下是一份可能实现的代码:
```c++
#include <QtNetwork>
#include <QtWidgets>
// 定义一个代理服务器地址
const QString proxyHost = "your.proxy.server.address";
const quint16 proxyPort = 1234;
class UpperComputer : public QWidget
{
Q_OBJECT
public:
UpperComputer(QWidget *parent = nullptr)
: QWidget(parent)
{
// 创建 GUI 控件
QVBoxLayout *layout = new QVBoxLayout(this);
QLabel *label = new QLabel(tr("Received data:"), this);
QLineEdit *lineEdit = new QLineEdit(this);
QPushButton *button = new QPushButton(tr("Send command"), this);
layout->addWidget(label);
layout->addWidget(lineEdit);
layout->addWidget(button);
// 创建代理服务器连接
proxySocket = new QTcpSocket(this);
proxySocket->connectToHost(proxyHost, proxyPort);
connect(proxySocket, &QTcpSocket::readyRead, this, &UpperComputer::onProxyReadyRead);
connect(proxySocket, &QTcpSocket::disconnected, this, &UpperComputer::onProxyDisconnected);
// 创建下位机连接
deviceSocket = new QTcpSocket(this);
connect(deviceSocket, &QTcpSocket::connected, this, &UpperComputer::onDeviceConnected);
connect(deviceSocket, &QTcpSocket::readyRead, this, &UpperComputer::onDeviceReadyRead);
connect(deviceSocket, &QTcpSocket::disconnected, this, &UpperComputer::onDeviceDisconnected);
// 发送命令
connect(button, &QPushButton::clicked, [this, lineEdit]() {
QByteArray command = lineEdit->text().toUtf8();
proxySocket->write(command);
});
}
private:
QTcpSocket *proxySocket;
QTcpSocket *deviceSocket;
private slots:
void onProxyReadyRead()
{
QByteArray data = proxySocket->readAll();
deviceSocket->write(data);
}
void onProxyDisconnected()
{
deviceSocket->close();
}
void onDeviceConnected()
{
qDebug() << "Device connected";
}
void onDeviceReadyRead()
{
QByteArray data = deviceSocket->readAll();
qDebug() << "Received data:" << data;
}
void onDeviceDisconnected()
{
qDebug() << "Device disconnected";
}
};
class LowerComputer : public QWidget
{
Q_OBJECT
public:
LowerComputer(QWidget *parent = nullptr)
: QWidget(parent)
{
// 创建 GUI 控件
QVBoxLayout *layout = new QVBoxLayout(this);
QLabel *label = new QLabel(tr("Received data:"), this);
QTextEdit *textEdit = new QTextEdit(this);
layout->addWidget(label);
layout->addWidget(textEdit);
// 创建下位机连接
deviceServer = new QTcpServer(this);
deviceServer->listen(QHostAddress::Any, 5678);
connect(deviceServer, &QTcpServer::newConnection, this, &LowerComputer::onDeviceNewConnection);
// 显示接收到的数据
connect(this, &LowerComputer::dataReceived, [textEdit](const QByteArray &data) {
QString text = QString::fromUtf8(data);
textEdit->append(text);
});
}
signals:
void dataReceived(const QByteArray &data);
private:
QTcpServer *deviceServer;
QTcpSocket *deviceSocket;
private slots:
void onDeviceNewConnection()
{
deviceSocket = deviceServer->nextPendingConnection();
connect(deviceSocket, &QTcpSocket::readyRead, this, &LowerComputer::onDeviceReadyRead);
connect(deviceSocket, &QTcpSocket::disconnected, this, &LowerComputer::onDeviceDisconnected);
}
void onDeviceReadyRead()
{
QByteArray data = deviceSocket->readAll();
emit dataReceived(data);
}
void onDeviceDisconnected()
{
deviceSocket->deleteLater();
}
};
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
UpperComputer upperComputer;
LowerComputer lowerComputer;
QObject::connect(&lowerComputer, &LowerComputer::dataReceived, &upperComputer, &UpperComputer::onDeviceReadyRead);
QHBoxLayout *layout = new QHBoxLayout;
layout->addWidget(&upperComputer);
layout->addWidget(&lowerComputer);
QWidget window;
window.setLayout(layout);
window.show();
return app.exec();
}
#include "main.moc"
```
这段代码实现了以下功能:
1. 上位机通过代理服务器连接下位机;
2. 上位机可以发送命令给下位机;
3. 下位机接收到命令后会将数据发送给所有连接的上位机;
4. 所有上位机接收到数据后会在 GUI 上显示出来。
需要注意以下几点:
1. 代理服务器的地址和端口需要根据实际情况修改;
2. 下位机的端口号是 5678,也可以根据实际情况修改;
3. 上位机和下位机的 GUI 控件可以根据需要进行修改。
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