C++ (Cpp) QgsRequestHandler::startGetFeatureResponse Examples

Example #1

File: qgswfsserver.cpp Project: mokerjoke/Quantum-GIS

void QgsWFSServer::startGetFeature( QgsRequestHandler& request, const QString& format )
{
  QByteArray result;
  QString fcString;
  if ( format == "GeoJSON" )
  {
    fcString = "{\"type\": \"FeatureCollection\",\n";
    fcString += " \"features\": [\n";
    result = fcString.toUtf8();
    request.startGetFeatureResponse( &result, format );
  }
  else
  {
    //wfs:FeatureCollection
    fcString = "<wfs:FeatureCollection";
    fcString += " xmlns=\"http://www.opengis.net/wfs\"";
    fcString += " xmlns:wfs=\"http://www.opengis.net/wfs\"";
    fcString += " xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"";
    fcString += " xsi:schemaLocation=\"http://www.opengis.net/wfs http://schemas.opengis.net/wfs/1.0.0/wfs.xsd\"";
    fcString += " xmlns:ogc=\"http://www.opengis.net/ogc\"";
    fcString += " xmlns:gml=\"http://www.opengis.net/gml\"";
    fcString += " xmlns:ows=\"http://www.opengis.net/ows\"";
    fcString += " xmlns:xlink=\"http://www.w3.org/1999/xlink\"";
    fcString += " xmlns:qgs=\"http://www.qgis.org/gml\"";
    fcString += ">";
    result = fcString.toUtf8();
    request.startGetFeatureResponse( &result, format );
  }
  fcString = "";
}

Example #2

File: qgswfsserver.cpp Project: mola/Quantum-GIS

void QgsWFSServer::startGetFeature( QgsRequestHandler& request, const QString& format, QgsCoordinateReferenceSystem& crs, QgsRectangle* rect )
{
  QByteArray result;
  QString fcString;
  if ( format == "GeoJSON" )
  {
    fcString = "{\"type\": \"FeatureCollection\",\n";
    fcString += " \"bbox\": [ " + QString::number( rect->xMinimum(), 'f', 6 ).remove( QRegExp( "[0]{1,5}$" ) ) + ", " + QString::number( rect->yMinimum(), 'f', 6 ).remove( QRegExp( "[0]{1,5}$" ) ) + ", " + QString::number( rect->xMaximum(), 'f', 6 ).remove( QRegExp( "[0]{1,5}$" ) ) + ", " + QString::number( rect->yMaximum(), 'f', 6 ).remove( QRegExp( "[0]{1,5}$" ) ) + "],\n";
    fcString += " \"features\": [\n";
    result = fcString.toUtf8();
    request.startGetFeatureResponse( &result, format );
  }
  else
  {
    //Prepare url
    //Some client requests already have http://<SERVER_NAME> in the REQUEST_URI variable
    QString hrefString;
    QString requestUrl = getenv( "REQUEST_URI" );
    QUrl mapUrl( requestUrl );
    mapUrl.setHost( QString( getenv( "SERVER_NAME" ) ) );

    //Add non-default ports to url
    QString portString = getenv( "SERVER_PORT" );
    if ( !portString.isEmpty() )
    {
      bool portOk;
      int portNumber = portString.toInt( &portOk );
      if ( portOk )
      {
        if ( portNumber != 80 )
        {
          mapUrl.setPort( portNumber );
        }
      }
    }

    if ( QString( getenv( "HTTPS" ) ).compare( "on", Qt::CaseInsensitive ) == 0 )
    {
      mapUrl.setScheme( "https" );
    }
    else
    {
      mapUrl.setScheme( "http" );
    }

    QList<QPair<QString, QString> > queryItems = mapUrl.queryItems();
    QList<QPair<QString, QString> >::const_iterator queryIt = queryItems.constBegin();
    for ( ; queryIt != queryItems.constEnd(); ++queryIt )
    {
      if ( queryIt->first.compare( "REQUEST", Qt::CaseInsensitive ) == 0 )
      {
        mapUrl.removeQueryItem( queryIt->first );
        mapUrl.addQueryItem( queryIt->first, "DescribeFeatureType" );
      }
      else if ( queryIt->first.compare( "FORMAT", Qt::CaseInsensitive ) == 0 )
      {
        mapUrl.removeQueryItem( queryIt->first );
      }
      else if ( queryIt->first.compare( "OUTPUTFORMAT", Qt::CaseInsensitive ) == 0 )
      {
        mapUrl.removeQueryItem( queryIt->first );
      }
      else if ( queryIt->first.compare( "BBOX", Qt::CaseInsensitive ) == 0 )
      {
        mapUrl.removeQueryItem( queryIt->first );
      }
      else if ( queryIt->first.compare( "FEATUREID", Qt::CaseInsensitive ) == 0 )
      {
        mapUrl.removeQueryItem( queryIt->first );
      }
      else if ( queryIt->first.compare( "FILTER", Qt::CaseInsensitive ) == 0 )
      {
        mapUrl.removeQueryItem( queryIt->first );
      }
      else if ( queryIt->first.compare( "MAXFEATURES", Qt::CaseInsensitive ) == 0 )
      {
        mapUrl.removeQueryItem( queryIt->first );
      }
      else if ( queryIt->first.compare( "PROPERTYNAME", Qt::CaseInsensitive ) == 0 )
      {
        mapUrl.removeQueryItem( queryIt->first );
      }
      else if ( queryIt->first.compare( "_DC", Qt::CaseInsensitive ) == 0 )
      {
        mapUrl.removeQueryItem( queryIt->first );
      }
    }
    mapUrl.addQueryItem( "OUTPUTFORMAT", "XMLSCHEMA" );
    hrefString = mapUrl.toString();

    //wfs:FeatureCollection
    fcString = "<wfs:FeatureCollection";
    fcString += " xmlns:wfs=\"http://www.opengis.net/wfs\"";
    fcString += " xmlns:ogc=\"http://www.opengis.net/ogc\"";
    fcString += " xmlns:gml=\"http://www.opengis.net/gml\"";
    fcString += " xmlns:ows=\"http://www.opengis.net/ows\"";
    fcString += " xmlns:xlink=\"http://www.w3.org/1999/xlink\"";
    fcString += " xmlns:qgs=\"http://www.qgis.org/gml\"";
    fcString += " xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"";
    fcString += " xsi:schemaLocation=\"http://www.opengis.net/wfs http://schemas.opengis.net/wfs/1.0.0/wfs.xsd http://www.qgis.org/gml " + hrefString.replace( "&", "&amp;" ) + "\"";
    fcString += ">";
    result = fcString.toUtf8();
    request.startGetFeatureResponse( &result, format );

    QDomDocument doc;
    QDomElement bbElem = doc.createElement( "gml:boundedBy" );
    QDomElement boxElem = createBoxElem( rect, doc );
    if ( !boxElem.isNull() )
    {
      if ( crs.isValid() )
      {
        boxElem.setAttribute( "srsName", crs.authid() );
      }
      bbElem.appendChild( boxElem );
      doc.appendChild( bbElem );
    }
    result = doc.toByteArray();
    request.sendGetFeatureResponse( &result );
  }
  fcString = "";
}