QGIS » QGIS Application

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

               ----------------------------------------------------

              date                 : 18.8.2015

              copyright            : (C) 2015 by Matthias Kuhn

              email                : matthias (at) opengis.ch

 ***************************************************************************

 *                                                                         *

 *   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 "qgsversioninfo.h"

#include "moc_qgsversioninfo.cpp"

#include "qgis.h"

#include "qgsapplication.h"

#include "qgsnetworkaccessmanager.h"

#include <QUrl>

QgsVersionInfo::QgsVersionInfo( QObject *parent )

  : QObject( parent )

{

}

void QgsVersionInfo::checkVersion()

{

  QNetworkRequest request( QUrl( QStringLiteral( "https://version.qgis.org/version.txt" ) ) );

  request.setAttribute( QNetworkRequest::CacheLoadControlAttribute, QNetworkRequest::AlwaysNetwork );

  QNetworkReply *reply = QgsNetworkAccessManager::instance()->get( request );

  connect( reply, &QNetworkReply::finished, this, &QgsVersionInfo::versionReplyFinished );

}

bool QgsVersionInfo::newVersionAvailable() const

{

  return mLatestVersion > Qgis::versionInt();

}

bool QgsVersionInfo::isDevelopmentVersion() const

{

  return Qgis::versionInt() > mLatestVersion;

}

void QgsVersionInfo::versionReplyFinished()

{

  QNetworkReply *reply = qobject_cast<QNetworkReply *>( sender() );

  Q_ASSERT( reply );

  mError = reply->error();

  mErrorString = reply->errorString();

  if ( mError == QNetworkReply::NoError )

  {

    QString versionMessage = reply->readAll();

    // strip the header

    const QString contentFlag = QStringLiteral( "#QGIS Version" );

    int pos = versionMessage.indexOf( contentFlag );

    if ( pos > -1 )

    {

      pos += contentFlag.length();

      versionMessage = versionMessage.mid( pos );

      QStringList parts = versionMessage.split( '|', Qt::SkipEmptyParts );

      // check the version from the  server against our version

      mLatestVersion = parts[0].toInt();

      mDownloadInfo = parts.value( 1 );

      mAdditionalHtml = parts.value( 2 );

    }

  }

  // get error type

  switch ( mError )

  {

    case QNetworkReply::ConnectionRefusedError:

      mErrorString = tr( "Connection refused - server may be down" );

      break;

    case QNetworkReply::HostNotFoundError:

      mErrorString = tr( "The host name %1 could not be resolved. Check your DNS settings or contact your system administrator." ).arg( reply->request().url().host() );

      break;

    case QNetworkReply::NoError:

      mErrorString.clear();

      break;

    default:

      mErrorString = reply->errorString();

      break;

  }

  reply->deleteLater();

  emit versionInfoAvailable();

}