qgsnetworkcontentfetchertask.cpp

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/***************************************************************************
                       qgsnetworkcontentfetchertask.cpp
                             -------------------
    begin                : March 2018
    copyright            : (C) 2018 by Nyall Dawson
    email                : nyall dot dawson at gmail dot com

 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/

#include "qgsnetworkcontentfetchertask.h"
#include "qgsnetworkcontentfetcher.h"

QgsNetworkContentFetcherTask::QgsNetworkContentFetcherTask( const QUrl &url )
  : QgsNetworkContentFetcherTask( QNetworkRequest( url ) )
{
}

QgsNetworkContentFetcherTask::QgsNetworkContentFetcherTask( const QNetworkRequest &request )
  : QgsTask( tr( "Fetching %1" ).arg( request.url().toString() ) )
  , mRequest( request )
{
}

QgsNetworkContentFetcherTask::~QgsNetworkContentFetcherTask()
{
  if ( mFetcher )
    mFetcher->deleteLater();
}

bool QgsNetworkContentFetcherTask::run()
{
  mFetcher = new QgsNetworkContentFetcher();
  QEventLoop loop;
  connect( mFetcher, &QgsNetworkContentFetcher::finished, &loop, &QEventLoop::quit );
  connect( mFetcher, &QgsNetworkContentFetcher::downloadProgress, this, [ = ]( qint64 bytesReceived, qint64 bytesTotal )
  {
    if ( !isCanceled() && bytesTotal > 0 )
    {
      int progress = ( bytesReceived * 100 ) / bytesTotal;
      // don't emit 100% progress reports until completely fetched - otherwise we get
      // intermediate 100% reports from redirects
      if ( progress < 100 )
        setProgress( progress );
    }
  } );
  mFetcher->fetchContent( mRequest );
  loop.exec();
  if ( !isCanceled() )
    setProgress( 100 );
  emit fetched();
  return true;
}

void QgsNetworkContentFetcherTask::cancel()
{
  if ( mFetcher )
    mFetcher->cancel();

  QgsTask::cancel();
}

QNetworkReply *QgsNetworkContentFetcherTask::reply()
{
  return mFetcher ? mFetcher->reply() : nullptr;
}