qftp作为客户端上传文件，demo

qftp的源码，看我上一篇文章，或者自行搜索

头文件

#include "qftp.h"

//这个头文件描述文件信息，暂时没用上
#include <QFileInfo>


class A
{

private slots:
	
	//这两个必须实现
	void ftpStateChanged(int state);
    void ftpCommandFinish(int id, bool en);

	//上传文件到客户端
	QString ftp_put_file(QString filename);
private:
  QFtp* ftp = nullptr;
  
};

实现这两个信号槽

void A::ftpStateChanged(int state)
{
    if (state == QFtp::Unconnected)
    {
        // IsLogin = false;
        qDebug() << "state change to QFtp::Unconnected" << endl;
    }
    if (state == QFtp::Connected)
    {
        qDebug() << "state change to QFtp::Connected" << endl;
    }
    if (state == QFtp::HostLookup)
    {
        qDebug() << "state change to QFtp::HostLookup" << endl;
    }
    if (state == QFtp::LoggedIn)
    {
        qDebug() << "state change to QFtp::LoggedIn" << endl;
        // IsLogin = true;
    }
    if (state == QFtp::Closing)
    {
        qDebug() << "state change to QFtp::Closing" << endl;
    }
}

void A::ftpCommandFinish(int id, bool en)
{
    Q_UNUSED(id)

    if (ftp->currentCommand() == QFtp::ConnectToHost)
    {
        if (en)
        {
            qDebug() << "QFtp::ConnectToHost ftp->errorString: " << ftp->errorString() << endl;
        }
        else
        {

        }
    }

    if (ftp->currentCommand() == QFtp::Login)
    {
        if (en)
        {
            qDebug() << "QFtp::Login ftp->errorString: " << ftp->errorString() << endl;
        }
        else
        {
            //            ftp->cd(toSpecialEncoding("/"));
            //            ftp->list();
        }
    }

    if (ftp->currentCommand() == QFtp::Cd ||
            ftp->currentCommand() == QFtp::List)
    {
    }

    if (ftp->currentCommand() == QFtp::Get)
    {
        if (en)
        {
            qDebug() << "ftp->errorString: " << ftp->errorString() << endl;
        }
        else
        {
        }
    }
    else if (ftp->currentCommand() == QFtp::Put)
    {
        if (en)
        {
            qDebug() << "QFtp::Put ftp->errorString: " << ftp->errorString() << endl;
            QMessageBox::information(nullptr, JString("上传失败"), ftp->errorString());
            ftp->abort();
        }
        else
        {
            qDebug() << "QFtp::Put successed" << endl;
        }
    }
    else if (ftp->currentCommand() == QFtp::Close)
    {
    }
    else if (ftp->currentCommand() == QFtp::Unconnected)
    {
    }
    else if (ftp->currentCommand() == QFtp::Rename)
    {
    }
    else if (ftp->currentCommand() == QFtp::Mkdir)
    {
        if(en)
        {
            qDebug()<<"QFtp::Mkdir failed: "<< ftp->errorString() <<endl;
        }
        else
        {
            qDebug()<<"QFtp::Mkdir successed"<<endl;
        }
    }
    else if (ftp->currentCommand() == QFtp::Remove)
    {
    }
    else if (ftp->currentCommand() == QFtp::Rmdir)
    {
    }
}	

main函数,初始化

  void main()
  {
    ftp = new QFtp(this);
    connect(ftp, SIGNAL(stateChanged(int)), this, SLOT(ftpStateChanged(int)));
    connect(ftp, SIGNAL(commandFinished(int, bool)), SLOT(ftpCommandFinish(int, bool)));

    
    ftp->connectToHost( "127.0.0.1", 21);
    ftp->login("Software Department", "zhizhou666");
	  }

上传file到客户端

//上传file
QString ftp_put_file(QString filename);

QString Home::ftp_put_file(QString filename)
{
    if (ftp->state() != QFtp::LoggedIn)
    {
        QMessageBox::information(nullptr, JString("无法上传"), JString("FTP 登录失败，无法上传文件"));
        return QString();
    }

    QFileInfo info(filename);
    QString new_dir = "save file"
    ftp->mkdir(new_dir);
    QString ftp_path =  "E:/123.xml";
    QFile *m_File = new QFile(filename);

    //m_File = new QFile("E:/cache/ETLinkInitPlan-data-base.xml");
    //m_File = new QFile("E:/cache/240116T143345.xml");

    if (!m_File->isOpen())
    {
        ftp->put(m_File, ftp_path);
    }
    else
    {
        qDebug()<<"ftp file opened, upload failed!"<<endl;
    }
    m_File->close();
    return ftp_path;
}