#include <QtCore>#include <QtNetwork>#include <iostream>#include "ftpget.h"using namespace std;FtpGet::FtpGet(QObject *parent)    : QObject(parent){    connect(&ftp, SIGNAL(done(bool)), this, SLOT(ftpDone(bool)));}bool FtpGet::getFile(const QUrl &url){    if (!url.isValid()) {        cerr << "Error: Invalid URL" << endl;        return false;    }    if (url.scheme() != "ftp") {        cerr << "Error: URL must start with 'ftp:'" << endl;        return false;    }    if (url.path().isEmpty()) {        cerr << "Error: URL has no path" << endl;        return false;    }    QString localFileName = QFileInfo(url.path()).fileName();    if (localFileName.isEmpty())        localFileName = "ftpget.out";    file.setFileName(localFileName);    if (!file.open(QIODevice::WriteOnly)) {        cerr << "Error: Cannot open " << qPrintable(file.fileName())             << " for writing: " << qPrintable(file.errorString())             << endl;        return false;    }    ftp.connectToHost(url.host(), url.port(21));    ftp.login();    ftp.get(url.path(), &file);    ftp.close();    return true;}void FtpGet::ftpDone(bool error){    if (error) {        cerr << "Error: " << qPrintable(ftp.errorString()) << endl;    } else {        cerr << "File downloaded as " << qPrintable(file.fileName())             << endl;    }    file.close();    emit done();}