以下是一个示例代码,演示了如何在Qt中从前端获取Base64编码的ZIP压缩包并将其保存到用户选择的目标地址:
#include <QApplication>
#include <QFileDialog>
#include <QMessageBox>
#include <QByteArray>
#include <QFile>
class ZipDownloader : public QObject
{
Q_OBJECT
public:
explicit ZipDownloader(QObject *parent = nullptr) : QObject(parent)
{
connect(&fileDialog, &QFileDialog::fileSelected, this, &ZipDownloader::saveFile);
}
public slots:
void chooseDestination()
{
fileDialog.setAcceptMode(QFileDialog::AcceptSave);
fileDialog.setWindowTitle("Choose Destination");
fileDialog.setNameFilter("ZIP Files (*.zip)");
fileDialog.exec();
}
private slots:
void saveFile(const QString &filePath)
{
QFile zipFile(filePath);
if (!zipFile.open(QIODevice::WriteOnly)) {
QMessageBox::critical(nullptr, "Error", "Failed to open file for writing.");
return;
}
QByteArray zipData = retrieveBase64FromFrontend(); // 从前端获取Base64编码的ZIP数据
QByteArray decodedData = QByteArray::fromBase64(zipData);
qint64 bytesWritten = zipFile.write(decodedData);
if (bytesWritten == -1) {
QMessageBox::critical(nullptr, "Error", "Failed to write data to file.");
return;
}
zipFile.close();
QMessageBox::information(nullptr, "Success", "ZIP file saved successfully.");
}
private:
QByteArray retrieveBase64FromFrontend()
{
// 在这里实现从前端获取Base64编码的ZIP数据的逻辑,返回该数据
return QByteArray(); // 返回空数据,需根据具体情况实现
}
private:
QFileDialog fileDialog;
};
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
ZipDownloader zipDownloader;
// 在主窗口弹出对话框中选择存放地址
QTimer::singleShot(0, [&]() { zipDownloader.chooseDestination(); });
return app.exec();
}
#include "main.moc"
请注意,这只是一个简单的示例代码,你需要根据自己的前端通信方式和逻辑来实现从前端获取Base64编码ZIP数据的方法retrieveBase64FromFrontend()
。此外,还应添加适当的错误处理和边界检查,以确保程序的稳定性和安全性。
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