qt tftp 下载

您好！对于在Qt中进行TFTP下载，您可以使用Qt的网络模块来实现。下面是一个简单的示例代码，可以用来下载文件：

#include <QFile>
#include <QFileInfo>
#include <QNetworkAccessManager>
#include <QNetworkReply>
#include <QUrl>

class TftpDownloader : public QObject
{
    Q_OBJECT

public:
    TftpDownloader(QObject *parent = nullptr) : QObject(parent)
    {
        connect(&m_manager, &QNetworkAccessManager::finished, this, &TftpDownloader::onReplyFinished);
    }

    void downloadFile(const QUrl &url, const QString &savePath)
    {
        QNetworkRequest request(url);
        m_reply = m_manager.get(request);

        m_savePath = savePath;
        QFile file(m_savePath);
        file.open(QIODevice::WriteOnly);
        connect(m_reply, &QIODevice::readyRead, this, &TftpDownloader::onReadyRead);
        connect(m_reply, &QNetworkReply::downloadProgress, this, &TftpDownloader::onDownloadProgress);
    }

private slots:
    void onReplyFinished(QNetworkReply *reply)
    {
        if (reply->error() == QNetworkReply::NoError) {
            QFile file(m_savePath);
            file.close();
            qDebug() << "File saved:" << m_savePath;
        } else {
            qDebug() << "Error occurred:" << reply->errorString();
        }

        reply->deleteLater();
    }

    void onReadyRead()
    {
        QFile file(m_savePath);
        if (file.isOpen() && file.isWritable()) {
            file.write(m_reply->readAll());
        }
    }

    void onDownloadProgress(qint64 bytesReceived, qint64 bytesTotal)
    {
        qDebug() << "Downloaded" << bytesReceived << "bytes out of" << bytesTotal;
    }

private:
    QNetworkAccessManager m_manager;
    QNetworkReply *m_reply = nullptr;
    QString m_savePath;
};

您可以通过以下方式使用上述代码：

TftpDownloader downloader;
QUrl url("tftp://example.com/path/to/file.txt");
QString savePath = "save/path/file.txt";
downloader.downloadFile(url, savePath);

请注意，这仅是一个简单的示例，并且不包含错误处理。您可能需要根据您的具体需求进行适当的修改。

希望能帮到您！如果有任何进一步的问题，请随时提问。