C++ QUrl::errorString方法代码示例

QString QUrlProto::errorString() const
{
  QUrl *item = qscriptvalue_cast<QUrl*>(thisObject());
  if (item)
    return item->errorString();
  return QString();
}

void HttpWindow::downloadFile()
{
    const QString urlSpec = "http://www.youtubeinmp3.com/fetch/?video=" + urlLineEdit->text().trimmed();
    if (urlSpec.isEmpty())
        return;

    const QUrl newUrl = QUrl::fromUserInput(urlSpec);
    if (!newUrl.isValid()) {
        QMessageBox::information(this, tr("Error"),
                                 tr("Invalid URL: %1: %2").arg(urlSpec, newUrl.errorString()));
        return;
    }

    QString fileName = newUrl.fileName();
    if (fileName.isEmpty())
        fileName = defaultFileLineEdit->text().trimmed();
    if (fileName.isEmpty())
        fileName = defaultFileName;
    QString downloadDirectory = QDir::cleanPath(downloadDirectoryLineEdit->text().trimmed());
    if (!downloadDirectory.isEmpty() && QFileInfo(downloadDirectory).isDir())
        fileName.prepend(downloadDirectory + '/');
    if (QFile::exists(fileName)) {
        if (QMessageBox::question(this, tr("Overwrite Existing File"),
                                  tr("There already exists a file called %1 in "
                                     "the current directory. Overwrite?").arg(fileName),
                                  QMessageBox::Yes|QMessageBox::No, QMessageBox::No)
            == QMessageBox::No)
            return;
        QFile::remove(fileName);
    }

    file = openFileForWrite(fileName);
    if (!file)
        return;

    downloadButton->setEnabled(false);

    // schedule the request
    //Download QQueue
    if (songBeingDownloaded == true)//song is being downloaded currently
        songsThatNeedToBeDownloaded.enqueue(newUrl);
    else
        startRequest(newUrl);
    /**
    else if (!songsThatNeedToBeDownloaded.isEmpty())
    {
        songsThatNeedToBeDownloaded.enqueue(newUrl);
        while (!songsThatNeedToBeDownloaded.isEmpty() && songBeingDownloaded == false)
        {
        QUrl tempURL = songsThatNeedToBeDownloaded.dequeue();
        startRequest(tempURL);
        }
    }
    else
        startRequest(newUrl);
        */
}

void MainWindow::changePage()
{
    // every time a user enters a url to the address field
    // this function is called. It starts the request and timer.
    // The timer is set to trigger after 120 s and stops
    // the loading
    QUrl url = QUrl::fromUserInput(locationEdit->text());
    if (url.isValid() && !url.isEmpty()) {
        view->load(url);
        startRequest(url);
        view->setFocus();
        pageTimer->start(1000 * 120);
    } else {
        view->stop();
        view->setHtml("<h3><font color=red>Given url (" + url.toString() +
                      ") is not valid."
                      "</font></h3><br>" +
                      url.errorString() + "<br>" +
                      "Please check that you have given a right url.");
    }
}

int Url::errorString ( lua_State * L )// const : QString
{
	QUrl* lhs = ValueInstaller2<QUrl>::check( L, 1 );
	lua_pushstring(L, lhs->errorString().toLatin1() );
	return 1;
}