goldendict-ng/src/webmultimediadownload.cc

#include "webmultimediadownload.hh"
#include "filetype.hh"

namespace Dictionary {

#define MAX_REDIRECTS 10

WebMultimediaDownload::WebMultimediaDownload( QUrl const & url,
                                              QNetworkAccessManager & _mgr ) :
mgr( _mgr ),
redirectCount( 0 )
{
  connect( &mgr, &QNetworkAccessManager::finished, this, &WebMultimediaDownload::replyFinished, Qt::QueuedConnection );

  reply = mgr.get( QNetworkRequest( url ) );

#ifndef QT_NO_SSL
  connect( reply, SIGNAL( sslErrors( QList< QSslError > ) ),
           reply, SLOT( ignoreSslErrors() ) );
#endif
}

void WebMultimediaDownload::cancel()
{
  reply = NULL;

  finish();
}

void WebMultimediaDownload::replyFinished( QNetworkReply * r )
{
  if ( !r || r != reply )
    return; // Not our reply

  if ( r->error() == QNetworkReply::NoError )
  {
    // Check for redirect reply

    QVariant possibleRedirectUrl = reply->attribute( QNetworkRequest::RedirectionTargetAttribute );
    QUrl redirectUrl = possibleRedirectUrl.toUrl();
    if( !redirectUrl.isEmpty() )
    {
      disconnect( reply, 0, 0, 0 );
      reply->deleteLater();

      if( ++redirectCount > MAX_REDIRECTS )
      {
        setErrorString( "Too many redirects detected" );
        finish();
        return;
      }

      reply = mgr.get( QNetworkRequest( redirectUrl ) );
#ifndef QT_NO_SSL
      connect( reply, SIGNAL( sslErrors( QList< QSslError > ) ),
               reply, SLOT( ignoreSslErrors() ) );
#endif
      return;
    }

    // Handle reply data

    Mutex::Lock _( dataMutex );

    data.resize( r->bytesAvailable() );

    r->read( data.data(), data.size() );

    hasAnyData = true;
  }
  else
    setErrorString( r->errorString() );

  disconnect( r, 0, 0, 0 );
  r->deleteLater();
  reply = NULL;

  finish();
}

bool WebMultimediaDownload::isAudioUrl( QUrl const & url )
{
  // Note: we check for forvo sound links explicitly, as they don't have extensions

  return ( url.scheme() == "http" || url.scheme() == "https" ) && (
      Filetype::isNameOfSound( url.path().toUtf8().data() ) || url.host() == "apifree.forvo.com" );
}

}