bool QgsWcsCapabilities::parseCapabilitiesDom( QByteArray const &xml, QgsWcsCapabilitiesProperty &capabilities )
{
QgsDebugMsg( "Entered." );
#ifdef QGISDEBUG
QFile file( QDir::tempPath() + "/qgis-wcs-capabilities.xml" );
if ( file.open( QIODevice::WriteOnly ) )
{
file.write( xml );
file.close();
}
#endif
if ( ! convertToDom( xml ) ) return false;
QDomElement docElem = mCapabilitiesDom.documentElement();
// Assert that the DTD is what we expected (i.e. a WCS Capabilities document)
QgsDebugMsg( "testing tagName " + docElem.tagName() );
QString tagName = stripNS( docElem.tagName() );
if (
// We don't support 1.0, but try WCS_Capabilities tag to get version
tagName != "WCS_Capabilities" && // 1.0
tagName != "Capabilities" // 1.1, tags seen: Capabilities, wcs:Capabilities
)
{
if ( tagName == "ExceptionReport" )
{
mErrorTitle = tr( "Exception" );
mErrorFormat = "text/plain";
mError = tr( "Could not get WCS capabilities: %1" ).arg( domElementText( docElem, "Exception.ExceptionText" ) );
}
else
{
mErrorTitle = tr( "Dom Exception" );
mErrorFormat = "text/plain";
mError = tr( "Could not get WCS capabilities in the expected format (DTD): no %1 found.\nThis might be due to an incorrect WCS Server URL.\nTag:%3\nResponse was:\n%4" )
.arg( "Capabilities" )
.arg( docElem.tagName() )
.arg( QString( xml ) );
}
QgsLogger::debug( "Dom Exception: " + mError );
return false;
}
capabilities.version = docElem.attribute( "version" );
mVersion = capabilities.version;
if ( !mVersion.startsWith( "1.0" ) && !mVersion.startsWith( "1.1" ) )
{
mErrorTitle = tr( "Version not supported" );
mErrorFormat = "text/plain";
mError = tr( "WCS server version %1 is not supported by QGIS (supported versions: 1.0.0, 1.1.0, 1.1.2)" )
.arg( mVersion );
QgsLogger::debug( "WCS version: " + mError );
return false;
}
if ( mVersion.startsWith( "1.0" ) )
{
capabilities.title = domElementText( docElem, "Service.name" );
capabilities.abstract = domElementText( docElem, "Service.description" );
// There is also "label" in 1.0
capabilities.getCoverageGetUrl = domElement( docElem, "Capability.Request.GetCoverage.DCPType.HTTP.Get.OnlineResource" ).attribute( "xlink:href" );
parseContentMetadata( domElement( docElem, "ContentMetadata" ), capabilities.contents );
}
else if ( mVersion.startsWith( "1.1" ) )
{
capabilities.title = domElementText( docElem, "ServiceIdentification.Title" );
capabilities.abstract = domElementText( docElem, "ServiceIdentification.Abstract" );
QList<QDomElement> operationElements = domElements( docElem, "OperationsMetadata.Operation" );
foreach ( QDomElement el, operationElements )
{
if ( el.attribute( "name" ) == "GetCoverage" )
{
capabilities.getCoverageGetUrl = domElement( el, "DCP.HTTP.Get" ).attribute( "xlink:href" );
}
}
parseCoverageSummary( domElement( docElem, "Contents" ), capabilities.contents );
}
void QgsWcsCapabilities::parseCoverageSummary( QDomElement const &e, QgsWcsCoverageSummary &coverageSummary, QgsWcsCoverageSummary *parent )
{
coverageSummary.orderId = ++mCoverageCount;
coverageSummary.identifier = firstChildText( e, QStringLiteral( "Identifier" ) );
coverageSummary.title = firstChildText( e, QStringLiteral( "Title" ) );
coverageSummary.abstract = firstChildText( e, QStringLiteral( "Abstract" ) );
QDomNode n1 = e.firstChild();
while ( !n1.isNull() )
{
QDomElement el = n1.toElement();
if ( !el.isNull() )
{
QString tagName = stripNS( el.tagName() );
QgsDebugMsg( tagName + " : " + el.text() );
if ( tagName == QLatin1String( "SupportedFormat" ) )
{
// image/tiff, ...
// Formats may be here (UMN Mapserver) or may not (GeoServer)
coverageSummary.supportedFormat << el.text();
}
else if ( tagName == QLatin1String( "SupportedCRS" ) )
{
// TODO: SupportedCRS may be URL referencing a document
coverageSummary.supportedCrs << crsUrnToAuthId( el.text() );
}
else if ( tagName == QLatin1String( "WGS84BoundingBox" ) )
{
QList<double> low = parseDoubles( domElementText( el, QStringLiteral( "LowerCorner" ) ) );
QList<double> high = parseDoubles( domElementText( el, QStringLiteral( "UpperCorner" ) ) );
if ( low.size() == 2 && high.size() == 2 )
{
coverageSummary.wgs84BoundingBox = QgsRectangle( low[0], low[1], high[0], high[1] );
}
}
}
n1 = n1.nextSibling();
}
//QgsDebugMsg( "supportedFormat = " + coverageSummary.supportedFormat.join( "," ) );
// We collected params to be inherited, do children
n1 = e.firstChild();
while ( !n1.isNull() )
{
QDomElement el = n1.toElement();
if ( !el.isNull() )
{
QString tagName = stripNS( el.tagName() );
if ( tagName == QLatin1String( "CoverageSummary" ) )
{
QgsDebugMsg( QStringLiteral( " Nested coverage." ) );
QgsWcsCoverageSummary subCoverageSummary;
initCoverageSummary( subCoverageSummary );
// Inherit
subCoverageSummary.supportedCrs = coverageSummary.supportedCrs;
subCoverageSummary.supportedFormat = coverageSummary.supportedFormat;
parseCoverageSummary( el, subCoverageSummary, &coverageSummary );
subCoverageSummary.valid = true;
coverageSummary.coverageSummary.push_back( subCoverageSummary );
}
}
n1 = n1.nextSibling();
}
if ( parent && parent->orderId > 1 ) // ignore Contents to put them on top level
{
QgsDebugMsg( QStringLiteral( "coverage orderId = %1 identifier = %2 has parent %3" ).arg( coverageSummary.orderId ).arg( coverageSummary.identifier ).arg( parent->orderId ) );
mCoverageParents[ coverageSummary.orderId ] = parent->orderId;
}
if ( !coverageSummary.identifier.isEmpty() )
{
QgsDebugMsg( "add coverage " + coverageSummary.identifier + " to supported" );
mCoveragesSupported.push_back( coverageSummary );
}
if ( !coverageSummary.coverageSummary.empty() )
{
mCoverageParentIdentifiers[ coverageSummary.orderId ] = QStringList() << coverageSummary.identifier << coverageSummary.title << coverageSummary.abstract;
}
QgsDebugMsg( QStringLiteral( "coverage orderId = %1 identifier = %2" ).arg( coverageSummary.orderId ).arg( coverageSummary.identifier ) );
}