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qgsconfigcache.cpp
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qgsconfigcache.cpp
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/***************************************************************************
qgsconfigcache.cpp
------------------
begin : July 24th, 2010
copyright : (C) 2010 by Marco Hugentobler
email : marco dot hugentobler at sourcepole dot 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 "qgsconfigcache.h"
#include "qgsmessagelog.h"
#include "qgsserverexception.h"
#include "qgsstorebadlayerinfo.h"
#include "qgsserverprojectutils.h"
#include <QFile>
QgsConfigCache *QgsConfigCache::instance()
{
static QgsConfigCache *sInstance = nullptr;
if ( !sInstance )
sInstance = new QgsConfigCache();
return sInstance;
}
QgsConfigCache::QgsConfigCache()
{
QObject::connect( &mFileSystemWatcher, &QFileSystemWatcher::fileChanged, this, &QgsConfigCache::removeChangedEntry );
}
const QgsProject *QgsConfigCache::project( const QString &path, QgsServerSettings *settings )
{
if ( ! mProjectCache[ path ] )
{
std::unique_ptr<QgsProject> prj( new QgsProject() );
// This is required by virtual layers that call QgsProject::instance() inside the constructor :(
QgsProject::setInstance( prj.get() );
QgsStoreBadLayerInfo *badLayerHandler = new QgsStoreBadLayerInfo();
prj->setBadLayerHandler( badLayerHandler );
QgsProject::ReadFlags readFlags = QgsProject::ReadFlag();
if ( settings )
{
// Activate trust layer metadata flag
if ( settings->trustLayerMetadata() )
{
readFlags |= QgsProject::ReadFlag::FlagTrustLayerMetadata;
}
// Activate don't load layouts flag
if ( settings->getPrintDisabled() )
{
readFlags |= QgsProject::ReadFlag::FlagDontLoadLayouts;
}
}
if ( prj->read( path, readFlags ) )
{
if ( !badLayerHandler->badLayers().isEmpty() )
{
// if bad layers are not restricted layers so service failed
QStringList unrestrictedBadLayers;
// test bad layers through restrictedlayers
const QStringList badLayerIds = badLayerHandler->badLayers();
const QMap<QString, QString> badLayerNames = badLayerHandler->badLayerNames();
const QStringList resctrictedLayers = QgsServerProjectUtils::wmsRestrictedLayers( *prj );
for ( const QString &badLayerId : badLayerIds )
{
// if this bad layer is in restricted layers
// it doesn't need to be added to unrestricted bad layers
if ( badLayerNames.contains( badLayerId ) &&
resctrictedLayers.contains( badLayerNames.value( badLayerId ) ) )
{
continue;
}
unrestrictedBadLayers.append( badLayerId );
}
if ( !unrestrictedBadLayers.isEmpty() )
{
// This is a critical error unless QGIS_SERVER_IGNORE_BAD_LAYERS is set to TRUE
if ( ! settings || ! settings->ignoreBadLayers() )
{
QgsMessageLog::logMessage(
QStringLiteral( "Error, Layer(s) %1 not valid in project %2" ).arg( unrestrictedBadLayers.join( QLatin1String( ", " ) ), path ),
QStringLiteral( "Server" ), Qgis::Critical );
throw QgsServerException( QStringLiteral( "Layer(s) not valid" ) );
}
else
{
QgsMessageLog::logMessage(
QStringLiteral( "Warning, Layer(s) %1 not valid in project %2" ).arg( unrestrictedBadLayers.join( QLatin1String( ", " ) ), path ),
QStringLiteral( "Server" ), Qgis::Warning );
}
}
}
mProjectCache.insert( path, prj.release() );
mFileSystemWatcher.addPath( path );
}
else
{
QgsMessageLog::logMessage(
QStringLiteral( "Error when loading project file '%1': %2 " ).arg( path, prj->error() ),
QStringLiteral( "Server" ), Qgis::Critical );
}
}
return mProjectCache[ path ];
}
QDomDocument *QgsConfigCache::xmlDocument( const QString &filePath )
{
//first open file
QFile configFile( filePath );
if ( !configFile.exists() )
{
QgsMessageLog::logMessage( "Error, configuration file '" + filePath + "' does not exist", QStringLiteral( "Server" ), Qgis::Critical );
return nullptr;
}
if ( !configFile.open( QIODevice::ReadOnly ) )
{
QgsMessageLog::logMessage( "Error, cannot open configuration file '" + filePath + "'", QStringLiteral( "Server" ), Qgis::Critical );
return nullptr;
}
// first get cache
QDomDocument *xmlDoc = mXmlDocumentCache.object( filePath );
if ( !xmlDoc )
{
//then create xml document
xmlDoc = new QDomDocument();
QString errorMsg;
int line, column;
if ( !xmlDoc->setContent( &configFile, true, &errorMsg, &line, &column ) )
{
QgsMessageLog::logMessage( "Error parsing file '" + filePath +
QStringLiteral( "': parse error %1 at row %2, column %3" ).arg( errorMsg ).arg( line ).arg( column ), QStringLiteral( "Server" ), Qgis::Critical );
delete xmlDoc;
return nullptr;
}
mXmlDocumentCache.insert( filePath, xmlDoc );
mFileSystemWatcher.addPath( filePath );
xmlDoc = mXmlDocumentCache.object( filePath );
Q_ASSERT( xmlDoc );
}
return xmlDoc;
}
void QgsConfigCache::removeChangedEntry( const QString &path )
{
mProjectCache.remove( path );
//xml document must be removed last, as other config cache destructors may require it
mXmlDocumentCache.remove( path );
mFileSystemWatcher.removePath( path );
}
void QgsConfigCache::removeEntry( const QString &path )
{
removeChangedEntry( path );
}