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qgswmsserver.cpp
1321 lines (1159 loc) · 43.3 KB
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qgswmsserver.cpp
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/***************************************************************************
qgswmsserver.cpp
-------------------
begin : May 14, 2006
copyright : (C) 2006 by Marco Hugentobler & Ionut Iosifescu Enescu
email : marco dot hugentobler at karto dot baug dot ethz 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 "qgswmsserver.h"
#include "qgsconfigparser.h"
#include "qgsepsgcache.h"
#include "qgsfield.h"
#include "qgsmaplayer.h"
#include "qgsmaplayerregistry.h"
#include "qgsmaprenderer.h"
#include "qgsmaptopixel.h"
#include "qgspallabeling.h"
#include "qgsproject.h"
#include "qgsrasterlayer.h"
#include "qgsscalecalculator.h"
#include "qgscoordinatereferencesystem.h"
#include "qgsvectordataprovider.h"
#include "qgsvectorlayer.h"
#include "qgsmapserverlogger.h"
#include "qgsmapserviceexception.h"
#include "qgssldparser.h"
#include "qgssymbol.h"
#include "qgssymbolv2.h"
#include "qgsrenderer.h"
#include "qgslegendmodel.h"
#include "qgscomposerlegenditem.h"
#include "qgslogger.h"
#include <QImage>
#include <QPainter>
#include <QStringList>
#include <QTextStream>
QgsWMSServer::QgsWMSServer( std::map<QString, QString> parameters, QgsMapRenderer* renderer ): mParameterMap( parameters ), mConfigParser( 0 ), mMapRenderer( renderer )
{
}
QgsWMSServer::~QgsWMSServer()
{
}
QgsWMSServer::QgsWMSServer()
{
}
QDomDocument QgsWMSServer::getCapabilities()
{
QgsMSDebugMsg( "Entering QgsWMSServer::getCapabilities" )
QDomDocument doc;
//wms:WMS_Capabilities element
QDomElement wmsCapabilitiesElement = doc.createElement( "WMS_Capabilities"/*wms:WMS_Capabilities*/ );
wmsCapabilitiesElement.setAttribute( "xmlns", "http://www.opengis.net/wms" );
wmsCapabilitiesElement.setAttribute( "xmlns:xsi", "http://www.w3.org/2001/XMLSchema-instance" );
wmsCapabilitiesElement.setAttribute( "xsi:schemaLocation", "http://www.opengis.net/wms http://schemas.opengis.net/wms/1.3.0/capabilities_1_3_0.xsd" );
wmsCapabilitiesElement.setAttribute( "version", "1.3.0" );
doc.appendChild( wmsCapabilitiesElement );
QFile wmsService( "wms_metadata.xml" );
if ( !wmsService.open( QIODevice::ReadOnly ) )
{
//throw an exception...
QgsMSDebugMsg( "qgissoaprequesthandler.cpp: external wms service capabilities not found" )
}
else
{
QDomDocument externServiceDoc;
QString parseError;
int errorLineNo;
if ( !externServiceDoc.setContent( &wmsService, false, &parseError, &errorLineNo ) )
{
QgsMSDebugMsg( "qgissoaprequesthandler.cpp: parse error at setting content of external wms service capabilities: "\
+ parseError + " at line " + QString::number( errorLineNo ) )
wmsService.close();
}
wmsService.close();
QDomElement service = externServiceDoc.firstChildElement();
wmsCapabilitiesElement.appendChild( service );
}
//wms:Capability element
QDomElement capabilityElement = doc.createElement( "Capability"/*wms:Capability*/ );
wmsCapabilitiesElement.appendChild( capabilityElement );
//wms:Request element
QDomElement requestElement = doc.createElement( "Request"/*wms:Request*/ );
capabilityElement.appendChild( requestElement );
//wms:GetCapabilities
QDomElement getCapabilitiesElement = doc.createElement( "GetCapabilities"/*wms:GetCapabilities*/ );
requestElement.appendChild( getCapabilitiesElement );
QDomElement capabilitiesFormatElement = doc.createElement( "Format" );/*wms:Format*/
getCapabilitiesElement.appendChild( capabilitiesFormatElement );
QDomText capabilitiesFormatText = doc.createTextNode( "text/xml" );
capabilitiesFormatElement.appendChild( capabilitiesFormatText );
QDomElement dcpTypeElement = doc.createElement( "DCPType"/*wms:DCPType*/ );
getCapabilitiesElement.appendChild( dcpTypeElement );
QDomElement httpElement = doc.createElement( "HTTP"/*wms:HTTP*/ );
dcpTypeElement.appendChild( httpElement );
//Prepare url
//Some client requests already have http://<SERVER_NAME> in the REQUEST_URI variable
QString hrefString;
QString requestUrl = getenv( "REQUEST_URI" );
requestUrl.truncate( requestUrl.indexOf( "?" ) + 1 );
if ( requestUrl.contains( "http" ) )
{
hrefString = requestUrl;
}
else
{
hrefString = "http://" + QString( getenv( "SERVER_NAME" ) ) + requestUrl;
}
// SOAP platform
//only give this information if it is not a WMS request to be in sync with the WMS capabilities schema
std::map<QString, QString>::const_iterator service_it = mParameterMap.find( "SERVICE" );
if ( service_it != mParameterMap.end() && service_it->second.compare( "WMS", Qt::CaseInsensitive ) != 0 )
{
QDomElement soapElement = doc.createElement( "SOAP"/*wms:SOAP*/ );
httpElement.appendChild( soapElement );
QDomElement soapResourceElement = doc.createElement( "OnlineResource"/*wms:OnlineResource*/ );
soapResourceElement.setAttribute( "xmlns:xlink", "http://www.w3.org/1999/xlink" );
soapResourceElement.setAttribute( "xlink:type", "simple" );
soapResourceElement.setAttribute( "xlink:href", hrefString );
soapElement.appendChild( soapResourceElement );
}
//only Get supported for the moment
QDomElement getElement = doc.createElement( "Get"/*wms:Get*/ );
httpElement.appendChild( getElement );
QDomElement olResourceElement = doc.createElement( "OnlineResource"/*wms:OnlineResource*/ );
olResourceElement.setAttribute( "xmlns:xlink", "http://www.w3.org/1999/xlink" );
olResourceElement.setAttribute( "xlink:type", "simple" );
requestUrl.truncate( requestUrl.indexOf( "?" ) + 1 );
olResourceElement.setAttribute( "xlink:href", hrefString );
getElement.appendChild( olResourceElement );
// POST already used by SOAP
// QDomElement postElement = doc.createElement("post"/*wms:SOAP*/);
// httpElement.appendChild(postElement);
// QDomElement postResourceElement = doc.createElement("OnlineResource"/*wms:OnlineResource*/);
// postResourceElement.setAttribute("xmlns:xlink","http://www.w3.org/1999/xlink");
// postResourceElement.setAttribute("xlink:type","simple");
// postResourceElement.setAttribute("xlink:href", "http://" + QString(getenv("SERVER_NAME")) + QString(getenv("REQUEST_URI")));
// postElement.appendChild(postResourceElement);
// dcpTypeElement.appendChild(postElement);
//wms:GetMap
QDomElement getMapElement = doc.createElement( "GetMap"/*wms:GetMap*/ );
requestElement.appendChild( getMapElement );
QDomElement jpgFormatElement = doc.createElement( "Format"/*wms:Format*/ );
QDomText jpgFormatText = doc.createTextNode( "image/jpeg" );
jpgFormatElement.appendChild( jpgFormatText );
getMapElement.appendChild( jpgFormatElement );
QDomElement pngFormatElement = doc.createElement( "Format"/*wms:Format*/ );
QDomText pngFormatText = doc.createTextNode( "image/png" );
pngFormatElement.appendChild( pngFormatText );
getMapElement.appendChild( pngFormatElement );
QDomElement getMapDhcTypeElement = dcpTypeElement.cloneNode().toElement();//this is the same as for 'GetCapabilities'
getMapElement.appendChild( getMapDhcTypeElement );
//wms:GetFeatureInfo
QDomElement getFeatureInfoElem = doc.createElement( "GetFeatureInfo" );
//text/plain
QDomElement textFormatElem = doc.createElement( "Format" );
QDomText textFormatText = doc.createTextNode( "text/plain" );
textFormatElem.appendChild( textFormatText );
getFeatureInfoElem.appendChild( textFormatElem );
//text/html
QDomElement htmlFormatElem = doc.createElement( "Format" );
QDomText htmlFormatText = doc.createTextNode( "text/html" );
htmlFormatElem.appendChild( htmlFormatText );
getFeatureInfoElem.appendChild( htmlFormatElem );
//text/xml
QDomElement xmlFormatElem = doc.createElement( "Format" );
QDomText xmlFormatText = doc.createTextNode( "text/xml" );
xmlFormatElem.appendChild( xmlFormatText );
getFeatureInfoElem.appendChild( xmlFormatElem );
//dcpType
QDomElement getFeatureInfoDhcTypeElement = dcpTypeElement.cloneNode().toElement();//this is the same as for 'GetCapabilities'
getFeatureInfoElem.appendChild( getFeatureInfoDhcTypeElement );
requestElement.appendChild( getFeatureInfoElem );
//Exception element is mandatory
QDomElement exceptionElement = doc.createElement( "Exception" );
QDomElement exFormatElement = doc.createElement( "Format" );
QDomText formatText = doc.createTextNode( "text/xml" );
exFormatElement.appendChild( formatText );
exceptionElement.appendChild( exFormatElement );
capabilityElement.appendChild( exceptionElement );
//add the xml content for the individual layers/styles
QgsMSDebugMsg( "Entering layersAndStylesCapabilities" )
mConfigParser->layersAndStylesCapabilities( capabilityElement, doc );
QgsMSDebugMsg( "Entering layersAndStylesCapabilities" )
//for debugging: save the document to disk
QFile capabilitiesFile( "/tmp/capabilities.txt" );
if ( capabilitiesFile.open( QIODevice::WriteOnly | QIODevice::Text ) )
{
QTextStream capabilitiesStream( &capabilitiesFile );
doc.save( capabilitiesStream, 4 );
}
return doc;
}
QImage* QgsWMSServer::getLegendGraphics()
{
if ( !mConfigParser || !mMapRenderer )
{
return false;
}
QStringList layersList, stylesList;
if ( readLayersAndStyles( layersList, stylesList ) != 0 )
{
QgsMSDebugMsg( "QgsWMSServer: error reading layers and styles" )
return 0;
}
if ( layersList.size() < 1 )
{
return 0;
}
QgsCoordinateReferenceSystem dummyCRS;
QStringList layerIds = layerSet( layersList, stylesList, dummyCRS );
QgsLegendModel legendModel;
legendModel.setLayerSet( layerIds );
//create first image (to find out dpi)
QImage* theImage = createImage( 10, 10 );
if ( !theImage )
{
return 0;
}
double mmToPixelFactor = theImage->dotsPerMeterX() / 1000;
//get icon size, spaces between legend items and font from config parser
double boxSpace, layerSpace, symbolSpace, iconLabelSpace, symbolWidth, symbolHeight;
boxSpace = mConfigParser->legendBoxSpace() * mmToPixelFactor;
layerSpace = mConfigParser->legendLayerSpace() * mmToPixelFactor;
symbolSpace = mConfigParser->legendSymbolSpace() * mmToPixelFactor;
iconLabelSpace = mConfigParser->legendIconLabelSpace() * mmToPixelFactor;
symbolWidth = mConfigParser->legendSymbolWidth() * mmToPixelFactor;
symbolHeight = mConfigParser->legendSymbolHeight() * mmToPixelFactor;
double maxX = 0;
double currentY = 0;
double fontOversamplingFactor = 10.0;
QFont layerFont = mConfigParser->legendLayerFont();
layerFont.setPixelSize( layerFont.pointSizeF() * 0.3528 * mmToPixelFactor * fontOversamplingFactor );
QFont itemFont = mConfigParser->legendItemFont();
itemFont.setPixelSize( itemFont.pointSizeF() * 0.3528 * mmToPixelFactor * fontOversamplingFactor );
//first find out image dimensions without painting
QStandardItem* rootItem = legendModel.invisibleRootItem();
if ( !rootItem )
{
return 0;
}
int numLayerItems = rootItem->rowCount();
if ( numLayerItems < 1 )
{
return 0;
}
currentY = boxSpace;
for ( int i = 0; i < numLayerItems; ++i )
{
QgsComposerLayerItem* layerItem = dynamic_cast<QgsComposerLayerItem*>( rootItem->child( i ) );
if ( layerItem )
{
drawLegendLayerItem( layerItem, 0, maxX, currentY, layerFont, itemFont, boxSpace, layerSpace, symbolSpace, \
iconLabelSpace, symbolWidth, symbolHeight, fontOversamplingFactor, theImage->dotsPerMeterX() * 0.0254 );
}
}
currentY += boxSpace;
//create second image with the right dimensions
QImage* paintImage = createImage( maxX, currentY );
//go through the items a second time for painting
QPainter p( paintImage );
p.setRenderHint( QPainter::Antialiasing, true );
currentY = boxSpace;
for ( int i = 0; i < numLayerItems; ++i )
{
QgsComposerLayerItem* layerItem = dynamic_cast<QgsComposerLayerItem*>( rootItem->child( i ) );
if ( layerItem )
{
drawLegendLayerItem( layerItem, &p, maxX, currentY, layerFont, itemFont, boxSpace, layerSpace, symbolSpace, \
iconLabelSpace, symbolWidth, symbolHeight, fontOversamplingFactor, theImage->dotsPerMeterX() * 0.0254 );
}
}
QgsMapLayerRegistry::instance()->mapLayers().clear();
delete theImage;
return paintImage;
}
QDomDocument QgsWMSServer::getStyle()
{
QDomDocument doc;
std::map<QString, QString>::const_iterator style_it = mParameterMap.find( "STYLE" );
if ( style_it == mParameterMap.end() )
{
throw QgsMapServiceException( "StyleNotSpecified", "Style is manadatory for GetStyle operation" );
}
std::map<QString, QString>::const_iterator layer_it = mParameterMap.find( "LAYER" );
if ( layer_it == mParameterMap.end() )
{
throw QgsMapServiceException( "LayerNotSpecified", "Layer is manadatory for GetStyle operation" );
}
QString styleName = style_it->second;
QString layerName = layer_it->second;
return mConfigParser->getStyle( styleName, layerName );
}
QImage* QgsWMSServer::getMap()
{
QgsMSDebugMsg( "Entering QgsWMSServer::getMap" )
if ( !mConfigParser )
{
QgsMSDebugMsg( "Error: mSLDParser is 0" )
return 0;
}
if ( !mMapRenderer )
{
QgsMSDebugMsg( "Error: mMapRenderer is 0" )
return 0;
}
QStringList layersList, stylesList;
QString formatString;
if ( readLayersAndStyles( layersList, stylesList ) != 0 )
{
QgsMSDebugMsg( "QgsWMSServer: error reading layers and styles" )
return 0;
}
if ( initializeSLDParser( layersList, stylesList ) != 0 )
{
return 0;
}
//pass external GML to the SLD parser.
std::map<QString, QString>::const_iterator gmlIt = mParameterMap.find( "GML" );
if ( gmlIt != mParameterMap.end() )
{
QDomDocument* gmlDoc = new QDomDocument();
if ( gmlDoc->setContent( gmlIt->second, true ) )
{
QString layerName = gmlDoc->documentElement().attribute( "layerName" );
QgsMSDebugMsg( "Adding entry with key: " + layerName + " to external GML data" )
mConfigParser->addExternalGMLData( layerName, gmlDoc );
}
else
{
QgsMSDebugMsg( "Error, could not add external GML to QgsSLDParser" )
delete gmlDoc;
}
}
//get output format
std::map<QString, QString>::const_iterator outIt = mParameterMap.find( "FORMAT" );
if ( outIt == mParameterMap.end() )
{
QgsMSDebugMsg( "Error, no parameter FORMAT found" )
return 0; //output format parameter also mandatory
}
QImage* theImage = createImage();
if ( !theImage )
{
return 0;
}
if ( configureMapRender( theImage ) != 0 )
{
return 0;
}
mMapRenderer->setLabelingEngine( new QgsPalLabeling() );
//find out the current scale denominater and set it to the SLD parser
QgsScaleCalculator scaleCalc(( theImage->logicalDpiX() + theImage->logicalDpiY() ) / 2 , mMapRenderer->destinationSrs().mapUnits() );
QgsRectangle mapExtent = mMapRenderer->extent();
mConfigParser->setScaleDenominator( scaleCalc.calculate( mapExtent, theImage->width() ) );
//create objects for qgis rendering
QStringList theLayers = layerSet( layersList, stylesList, mMapRenderer->destinationSrs() );
mMapRenderer->setLayerSet( theLayers );
QPainter thePainter( theImage );
thePainter.setRenderHint( QPainter::Antialiasing ); //make it look nicer
mMapRenderer->render( &thePainter );
QgsMapLayerRegistry::instance()->mapLayers().clear();
return theImage;
}
int QgsWMSServer::getFeatureInfo( QDomDocument& result )
{
if ( !mMapRenderer || !mConfigParser )
{
return 1;
}
result.clear();
QStringList layersList, stylesList;
bool conversionSuccess;
for ( std::map<QString, QString>::iterator it = mParameterMap.begin(); it != mParameterMap.end(); ++it )
{
QgsMapServerLogger::instance()->printMessage( it->first + "//" + it->second );
}
if ( readLayersAndStyles( layersList, stylesList ) != 0 )
{
return 0;
}
if ( initializeSLDParser( layersList, stylesList ) != 0 )
{
return 0;
}
QImage* outputImage = createImage();
if ( !outputImage )
{
return 1;
}
if ( configureMapRender( outputImage ) != 0 )
{
return 2;
}
//find out the current scale denominater and set it to the SLD parser
QgsScaleCalculator scaleCalc(( outputImage->logicalDpiX() + outputImage->logicalDpiY() ) / 2 , mMapRenderer->destinationSrs().mapUnits() );
QgsRectangle mapExtent = mMapRenderer->extent();
mConfigParser->setScaleDenominator( scaleCalc.calculate( mapExtent, outputImage->width() ) );
//read FEATURE_COUNT
int featureCount = 1;
std::map<QString, QString>::const_iterator feature_count_it = mParameterMap.find( "FEATURE_COUNT" );
if ( feature_count_it != mParameterMap.end() )
{
featureCount = feature_count_it->second.toInt( &conversionSuccess );
if ( !conversionSuccess )
{
featureCount = 1;
}
}
//read QUERY_LAYERS
std::map<QString, QString>::const_iterator query_layers_it = mParameterMap.find( "QUERY_LAYERS" );
if ( query_layers_it == mParameterMap.end() )
{
return 3;
}
QStringList queryLayerList = query_layers_it->second.split( ",", QString::SkipEmptyParts );
if ( queryLayerList.size() < 1 )
{
return 4;
}
//read I,J resp. X,Y
QString iString, jString;
int i = -1;
int j = -1;
std::map<QString, QString>::const_iterator i_it = mParameterMap.find( "I" );
if ( i_it == mParameterMap.end() )
{
std::map<QString, QString>::const_iterator x_it = mParameterMap.find( "X" );
if ( x_it == mParameterMap.end() )
{
return 5;
}
iString = x_it->second;
}
else
{
iString = i_it->second;
}
i = iString.toInt( &conversionSuccess );
if ( !conversionSuccess )
{
return 6;
}
std::map<QString, QString>::const_iterator j_it = mParameterMap.find( "J" );
if ( j_it == mParameterMap.end() )
{
std::map<QString, QString>::const_iterator y_it = mParameterMap.find( "Y" );
if ( y_it == mParameterMap.end() )
{
return 7;
}
jString = y_it->second;
}
else
{
jString = j_it->second;
}
j = jString.toInt( &conversionSuccess );
if ( !conversionSuccess )
{
return 8;
}
QDomElement getFeatureInfoElement = result.createElement( "GetFeatureInfoResponse" );
result.appendChild( getFeatureInfoElement );
QStringList nonIdentifiableLayers = mConfigParser->identifyDisabledLayers();
QMap< QString, QMap< int, QString > > aliasInfo = mConfigParser->layerAliasInfo();
QMap< QString, QSet<QString> > hiddenAttributes = mConfigParser->hiddenAttributes();
QList<QgsMapLayer*> layerList;
QgsMapLayer* currentLayer = 0;
QgsPoint infoPoint; //info point in coordinates of the layer
QStringList::const_iterator layerIt;
for ( layerIt = queryLayerList.constBegin(); layerIt != queryLayerList.constEnd(); ++layerIt )
{
//create maplayer from sld parser
layerList = mConfigParser->mapLayerFromStyle( *layerIt, "" );
currentLayer = layerList.at( 0 );
if ( !currentLayer || nonIdentifiableLayers.contains( currentLayer->getLayerID() ) )
{
continue;
}
if ( infoPointToLayerCoordinates( i, j, infoPoint, mMapRenderer, currentLayer ) != 0 )
{
continue;
}
QgsMSDebugMsg( "Info point in layer crs: " + QString::number( infoPoint.x() ) + "//" + QString::number( infoPoint.y() ) )
QDomElement layerElement = result.createElement( "Layer" );
layerElement.setAttribute( "name", currentLayer->name() );
getFeatureInfoElement.appendChild( layerElement );
//switch depending on vector or raster
QgsVectorLayer* vectorLayer = dynamic_cast<QgsVectorLayer*>( currentLayer );
if ( vectorLayer )
{
//is there alias info for this vector layer?
QMap< int, QString > layerAliasInfo;
QMap< QString, QMap< int, QString > >::const_iterator aliasIt = aliasInfo.find( currentLayer->getLayerID() );
if ( aliasIt != aliasInfo.constEnd() )
{
layerAliasInfo = aliasIt.value();
}
//hidden attributes for this layer
QSet<QString> layerHiddenAttributes;
QMap< QString, QSet<QString> >::const_iterator hiddenIt = hiddenAttributes.find( currentLayer->getLayerID() );
if ( hiddenIt != hiddenAttributes.constEnd() )
{
layerHiddenAttributes = hiddenIt.value();
}
if ( featureInfoFromVectorLayer( vectorLayer, infoPoint, featureCount, result, layerElement, mMapRenderer, layerAliasInfo, layerHiddenAttributes ) != 0 )
{
return 9;
}
}
else //raster layer
{
QgsRasterLayer* rasterLayer = dynamic_cast<QgsRasterLayer*>( currentLayer );
if ( rasterLayer )
{
if ( featureInfoFromRasterLayer( rasterLayer, infoPoint, result, layerElement ) != 0 )
{
return 10;
}
}
else
{
return 11;
}
}
}
return 0;
}
QImage* QgsWMSServer::createImage( int width, int height ) const
{
bool conversionSuccess;
if ( width < 0 )
{
std::map<QString, QString>::const_iterator wit = mParameterMap.find( "WIDTH" );
if ( wit == mParameterMap.end() )
{
return 0; //width parameter is mandatory
}
width = wit->second.toInt( &conversionSuccess );
if ( !conversionSuccess )
{
return 0;
}
}
if ( height < 0 )
{
std::map<QString, QString>::const_iterator hit = mParameterMap.find( "HEIGHT" );
if ( hit == mParameterMap.end() )
{
return 0; //height parameter is mandatory
}
height = hit->second.toInt( &conversionSuccess );
if ( !conversionSuccess )
{
return 0;
}
}
if ( width < 0 || height < 0 )
{
return 0;
}
QImage* theImage = 0;
//is format jpeg?
bool jpeg = false;
std::map<QString, QString>::const_iterator formatIt = mParameterMap.find( "FORMAT" );
if ( formatIt != mParameterMap.end() )
{
if ( formatIt->second.compare( "jpg", Qt::CaseInsensitive ) == 0 || formatIt->second.compare( "jpeg", Qt::CaseInsensitive ) == 0 || formatIt->second.compare( "image/jpeg", Qt::CaseInsensitive ) == 0 )
{
jpeg = true;
}
}
//transparent parameter
bool transparent = false;
std::map<QString, QString>::const_iterator transparentIt = mParameterMap.find( "TRANSPARENT" );
if ( transparentIt != mParameterMap.end() && transparentIt->second.compare( "true", Qt::CaseInsensitive ) == 0 )
{
transparent = true;
}
//use alpha channel only if necessary because it slows down performance
if ( transparent && !jpeg )
{
theImage = new QImage( width, height, QImage::Format_ARGB32_Premultiplied );
theImage->fill( 0 );
}
else
{
theImage = new QImage( width, height, QImage::Format_RGB32 );
theImage->fill( qRgb( 255, 255, 255 ) );
}
if ( !theImage )
{
return 0;
}
//apply DPI parameter if present. This is an extension of QGIS mapserver compared to WMS 1.3.
//Because of backwards compatibility, this parameter is optional
std::map<QString, QString>::const_iterator dit = mParameterMap.find( "DPI" );
if ( dit != mParameterMap.end() )
{
int dpi = dit->second.toInt( &conversionSuccess );
if ( conversionSuccess )
{
int dpm = dpi / 0.0254;
theImage->setDotsPerMeterX( dpm );
theImage->setDotsPerMeterY( dpm );
}
}
return theImage;
}
int QgsWMSServer::configureMapRender( const QPaintDevice* paintDevice ) const
{
if ( !mMapRenderer || !paintDevice )
{
return 1; //paint device is needed for height, width, dpi
}
mMapRenderer->setOutputSize( QSize( paintDevice->width(), paintDevice->height() ), paintDevice->logicalDpiX() );
//map extent
bool conversionSuccess;
double minx, miny, maxx, maxy;
std::map<QString, QString>::const_iterator bbIt = mParameterMap.find( "BBOX" );
if ( bbIt == mParameterMap.end() )
{
return 2;
}
bool bboxOk = true;
QString bbString = bbIt->second;
minx = bbString.section( ",", 0, 0 ).toDouble( &conversionSuccess );
if ( !conversionSuccess ) {bboxOk = false;}
miny = bbString.section( ",", 1, 1 ).toDouble( &conversionSuccess );
if ( !conversionSuccess ) {bboxOk = false;}
maxx = bbString.section( ",", 2, 2 ).toDouble( &conversionSuccess );
if ( !conversionSuccess ) {bboxOk = false;}
maxy = bbString.section( ",", 3, 3 ).toDouble( &conversionSuccess );
if ( !conversionSuccess ) {bboxOk = false;}
if ( !bboxOk )
{
//throw a service exception
throw QgsMapServiceException( "InvalidParameterValue", "Invalid BBOX parameter" );
}
QGis::UnitType mapUnits = QGis::Degrees;
std::map<QString, QString>::const_iterator crsIt = mParameterMap.find( "CRS" );
if ( crsIt == mParameterMap.end() )
{
crsIt = mParameterMap.find( "SRS" ); //some clients (e.g. QGIS) call it SRS
}
QgsCoordinateReferenceSystem outputCRS;
//wms spec says that CRS parameter is mandatory.
//we don't rejeict the request if it is not there but disable reprojection on the fly
if ( crsIt == mParameterMap.end() )
{
//disable on the fly projection
QgsProject::instance()->writeEntry( "SpatialRefSys", "/ProjectionsEnabled", 0 );
}
else
{
//enable on the fly projection
QgsMSDebugMsg( "enable on the fly projection" )
QgsProject::instance()->writeEntry( "SpatialRefSys", "/ProjectionsEnabled", 1 );
QString crsString = crsIt->second;
if ( !( crsString.left( 4 ) == "EPSG" ) )
{
return 3; // only EPSG ids supported
}
long epsgId = crsString.section( ":", 1, 1 ).toLong( &conversionSuccess );
if ( !conversionSuccess )
{
return 4;
}
//destination SRS
outputCRS = QgsEPSGCache::instance()->searchCRS( epsgId );
if ( !outputCRS.isValid() )
{
QgsMSDebugMsg( "Error, could not create output CRS from EPSG" )
throw QgsMapServiceException( "InvalidCRS", "Could not create output CRS" );
return 5;
}
mMapRenderer->setDestinationSrs( outputCRS );
mMapRenderer->setProjectionsEnabled( true );
mapUnits = outputCRS.mapUnits();
}
mMapRenderer->setMapUnits( mapUnits );
//Change x- and y- of BBOX for WMS 1.3.0 and geographic coordinate systems
std::map<QString, QString>::const_iterator versionIt = mParameterMap.find( "VERSION" );
if ( versionIt != mParameterMap.end() )
{
QString version = versionIt->second;
if ( version == "1.3.0" && outputCRS.geographicFlag() )
{
//switch coordinates of extent
double tmp;
tmp = minx;
minx = miny; miny = tmp;
tmp = maxx;
maxx = maxy; maxy = tmp;
}
}
QgsRectangle mapExtent( minx, miny, maxx, maxy );
mMapRenderer->setExtent( mapExtent );
if ( mConfigParser )
{
mMapRenderer->setOutputUnits( mConfigParser->outputUnits() );
}
else
{
mMapRenderer->setOutputUnits( QgsMapRenderer::Pixels ); //SLD units are in pixels normally
}
return 0;
}
int QgsWMSServer::readLayersAndStyles( QStringList& layersList, QStringList& stylesList ) const
{
//get layer and style lists from the parameters
layersList.clear();
stylesList.clear();
std::map<QString, QString>::const_iterator layersIt = mParameterMap.find( "LAYERS" );
if ( layersIt != mParameterMap.end() )
{
layersList = layersIt->second.split( "," );
}
std::map<QString, QString>::const_iterator stylesIt = mParameterMap.find( "STYLES" );
if ( stylesIt != mParameterMap.end() )
{
stylesList = stylesIt->second.split( "," );
}
return 0;
}
int QgsWMSServer::initializeSLDParser( QStringList& layersList, QStringList& stylesList )
{
std::map<QString, QString>::const_iterator sldIt = mParameterMap.find( "SLD" );
if ( sldIt != mParameterMap.end() )
{
//ignore LAYERS and STYLES and take those information from the SLD
QString xml = sldIt->second;
QDomDocument* theDocument = new QDomDocument( "user.sld" );
QString errorMsg;
int errorLine, errorColumn;
if ( !theDocument->setContent( xml, true, &errorMsg, &errorLine, &errorColumn ) )
{
//std::cout << xml.toAscii().data() << std::endl;
QgsMapServerLogger::instance()->printMessage( "Error, could not create DomDocument from SLD" );
QgsMapServerLogger::instance()->printMessage( "The error message is: " + errorMsg );
delete theDocument;
return 0;
}
QgsSLDParser* userSLDParser = new QgsSLDParser( theDocument );
userSLDParser->setParameterMap( mParameterMap );
userSLDParser->setFallbackParser( mConfigParser );
mConfigParser = userSLDParser;
//now replace the content of layersList and stylesList (if present)
layersList.clear();
stylesList.clear();
QStringList layersSTDList;
QStringList stylesSTDList;
if ( mConfigParser->layersAndStyles( layersSTDList, stylesSTDList ) != 0 )
{
QgsMSDebugMsg( "Error, no layers and styles found in SLD" )
return 0;
}
QStringList::const_iterator layersIt;
QStringList::const_iterator stylesIt;
for ( layersIt = layersSTDList.constBegin(), stylesIt = stylesSTDList.constBegin(); layersIt != layersSTDList.constEnd(); ++layersIt, ++stylesIt )
{
layersList << *layersIt;
stylesList << *stylesIt;
}
}
return 0;
}
int QgsWMSServer::infoPointToLayerCoordinates( int i, int j, QgsPoint& layerCoords, QgsMapRenderer* mapRender, \
QgsMapLayer* layer ) const
{
if ( !mapRender || !layer || !mapRender->coordinateTransform() )
{
return 1;
}
//first transform i,j to map output coordinates
QgsPoint mapPoint = mapRender->coordinateTransform()->toMapCoordinates( i, j );
//and then to layer coordinates
layerCoords = mapRender->mapToLayerCoordinates( layer, mapPoint );
return 0;
}
int QgsWMSServer::featureInfoFromVectorLayer( QgsVectorLayer* layer, const QgsPoint& infoPoint, int nFeatures, QDomDocument& infoDocument, QDomElement& layerElement, QgsMapRenderer* mapRender, \
QMap<int, QString>& aliasMap, QSet<QString>& hiddenAttributes ) const
{
if ( !layer || !mapRender )
{
return 1;
}
//we need a selection rect (0.01 of map width)
QgsRectangle mapRect = mapRender->extent();
QgsRectangle layerRect = mapRender->mapToLayerCoordinates( layer, mapRect );
double searchRadius = ( layerRect.xMaximum() - layerRect.xMinimum() ) / 200;
QgsRectangle searchRect( infoPoint.x() - searchRadius, infoPoint.y() - searchRadius, \
infoPoint.x() + searchRadius, infoPoint.y() + searchRadius );
//do a select with searchRect and go through all the features
QgsVectorDataProvider* provider = layer->dataProvider();
if ( !provider )
{
return 2;
}
QgsFeature feature;
QgsAttributeMap featureAttributes;
int featureCounter = 0;
const QgsFieldMap& fields = provider->fields();
provider->select( provider->attributeIndexes(), searchRect, true, true );
while ( provider->nextFeature( feature ) )
{
if ( featureCounter > nFeatures )
{
break;
}
QDomElement featureElement = infoDocument.createElement( "Feature" );
featureElement.setAttribute( "id", QString::number( feature.id() ) );
layerElement.appendChild( featureElement );
//read all attribute values from the feature
featureAttributes = feature.attributeMap();
for ( QgsAttributeMap::const_iterator it = featureAttributes.begin(); it != featureAttributes.end(); ++it )
{
QString attributeName = fields[it.key()].name();
//skip attribute if it has edit type 'hidden'
if ( hiddenAttributes.contains( attributeName ) )
{
continue;
}
//check if the attribute name should be replaced with an alias
QMap<int, QString>::const_iterator aliasIt = aliasMap.find( it.key() );
if ( aliasIt != aliasMap.constEnd() )
{
attributeName = aliasIt.value();
}
QDomElement attributeElement = infoDocument.createElement( "Attribute" );
attributeElement.setAttribute( "name", attributeName );
attributeElement.setAttribute( "value", it->toString() );
featureElement.appendChild( attributeElement );
}
}
return 0;
}
int QgsWMSServer::featureInfoFromRasterLayer( QgsRasterLayer* layer, const QgsPoint& infoPoint, QDomDocument& infoDocument, QDomElement& layerElement ) const
{
if ( !layer )
{
return 1;
}
QMap<QString, QString> attributes;
layer->identify( infoPoint, attributes );
for ( QMap<QString, QString>::const_iterator it = attributes.constBegin(); it != attributes.constEnd(); ++it )
{
QDomElement attributeElement = infoDocument.createElement( "Attribute" );
attributeElement.setAttribute( "name", it.key() );
attributeElement.setAttribute( "value", it.value() );
layerElement.appendChild( attributeElement );
}
return 0;
}
QStringList QgsWMSServer::layerSet( const QStringList& layersList, const QStringList& stylesList, const QgsCoordinateReferenceSystem& destCRS ) const
{
QStringList layerKeys;
QStringList::const_iterator llstIt;
QStringList::const_iterator slstIt;
QgsMapLayer* theMapLayer = 0;
for ( llstIt = layersList.begin(), slstIt = stylesList.begin(); llstIt != layersList.end(); ++llstIt )
{
QString styleName;
if ( slstIt != stylesList.end() )
{
styleName = *slstIt;
}
QgsMSDebugMsg( "Trying to get layer " + *llstIt + "//" + styleName )
//does the layer name appear several times in the layer list?
//if yes, layer caching must be disabled because several named layers could have
//several user styles
bool allowCaching = true;
if ( layersList.count( *llstIt ) > 1 )
{
allowCaching = false;