[bugfix][wfs] Expand support for 2.0.0 TYPENAMES

Fixes #17872 - WFS 2.0.0 DescribeFeatureType : TypeNames vs TypeName This PR introduces the plural form of TYPENAME for 2.0.0 WFS servers, with some additional logic to allow for 2.0.0 servers that only support TYPENAME for DescribeFeatureType: in this case, the singular form is also tried in case the plural one fails. There is still some work to do for transactional support but at least the read-only client part should now be ok. Tests have been added to check that: - TYPENAME form still works with old 2.0.0 - TYPENAMES form works with compliant 2.0.0 - choice geometry types are handled by calling GetFeature and examining the result
qgis · Jan 23, 2018 · ccb4c80 · ccb4c80 · palmerj · Apr 30, 2018
1 parent 3b0afb2
commit ccb4c80
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Showing 9 changed files with 424 additions and 35 deletions.
diff --git a/src/providers/wfs/qgswfsconnection.cpp b/src/providers/wfs/qgswfsconnection.cpp
@@ -28,12 +28,14 @@ QgsWfsConnection::QgsWfsConnection( const QString &connName )
   const QString &version = settings.value( key + "/" + QgsWFSConstants::SETTINGS_VERSION ).toString();
   if ( !version.isEmpty() )
   {
+    mUri.removeParam( QgsWFSConstants::URI_PARAM_VERSION ); // setParam allow for duplicates!
     mUri.setParam( QgsWFSConstants::URI_PARAM_VERSION, version );
   }
 
   const QString &maxnumfeatures = settings.value( key + "/" + QgsWFSConstants::SETTINGS_MAXNUMFEATURES ).toString();
   if ( !maxnumfeatures.isEmpty() )
   {
+    mUri.removeParam( QgsWFSConstants::URI_PARAM_MAXNUMFEATURES ); // setParam allow for duplicates!
     mUri.setParam( QgsWFSConstants::URI_PARAM_MAXNUMFEATURES, maxnumfeatures );
   }
 

diff --git a/src/providers/wfs/qgswfsdescribefeaturetype.cpp b/src/providers/wfs/qgswfsdescribefeaturetype.cpp
@@ -14,20 +14,25 @@
  ***************************************************************************/
 
 #include "qgswfsdescribefeaturetype.h"
+#include "qgswfsutils.h"
 
 QgsWFSDescribeFeatureType::QgsWFSDescribeFeatureType( const QString &uri )
   : QgsWfsRequest( uri )
 {
 }
 
 bool QgsWFSDescribeFeatureType::requestFeatureType( const QString &WFSVersion,
-    const QString &typeName )
+    const QString &typeName, bool forceSingularTypeName )
 {
   QUrl url( baseURL() );
   url.addQueryItem( QStringLiteral( "REQUEST" ), QStringLiteral( "DescribeFeatureType" ) );
   url.addQueryItem( QStringLiteral( "VERSION" ), WFSVersion );
-  url.addQueryItem( QStringLiteral( "TYPENAME" ), typeName );
-
+  // The specs are not consistent: is it singular in 1.0.x and plural in 2.0.0?
+  // see http://docs.opengeospatial.org/is/09-025r2/09-025r2.html#147
+  if ( ! forceSingularTypeName )
+    url.addQueryItem( QgsWFSUtils::typeNameParameterForVersion( WFSVersion ).toUpper( ), typeName );
+  else
+    url.addQueryItem( QStringLiteral( "TYPENAME" ), typeName );
   return sendGET( url, true, false );
 }
 

diff --git a/src/providers/wfs/qgswfsdescribefeaturetype.h b/src/providers/wfs/qgswfsdescribefeaturetype.h
@@ -25,7 +25,8 @@ class QgsWFSDescribeFeatureType : public QgsWfsRequest
     explicit QgsWFSDescribeFeatureType( const QString &uri );
 
     //! Issue the request
-    bool requestFeatureType( const QString &WFSVersion, const QString &typeName );
+    bool requestFeatureType( const QString &WFSVersion, const QString &typeName,
+                             bool forceSingularTypeName = false );
 
   protected:
     QString errorMessageWithReason( const QString &reason ) override;

diff --git a/src/providers/wfs/qgswfsprovider.cpp b/src/providers/wfs/qgswfsprovider.cpp
@@ -919,7 +919,7 @@ bool QgsWFSProvider::deleteFeatures( const QgsFeatureIds &id )
   transactionDoc.appendChild( transactionElem );
   //delete element
   QDomElement deleteElem = transactionDoc.createElementNS( QgsWFSConstants::WFS_NAMESPACE, QStringLiteral( "Delete" ) );
-  deleteElem.setAttribute( QStringLiteral( "typeName" ), tname );
+  deleteElem.setAttribute( QgsWFSUtils::typeNameParameterForVersion( mShared->mWFSVersion ), tname );
   QDomElement filterElem = transactionDoc.createElementNS( QgsWFSConstants::OGC_NAMESPACE, QStringLiteral( "Filter" ) );
 
 
@@ -984,7 +984,7 @@ bool QgsWFSProvider::changeGeometryValues( const QgsGeometryMap &geometry_map )
       continue;
     }
     QDomElement updateElem = transactionDoc.createElementNS( QgsWFSConstants::WFS_NAMESPACE, QStringLiteral( "Update" ) );
-    updateElem.setAttribute( QStringLiteral( "typeName" ), tname );
+    updateElem.setAttribute( QgsWFSUtils::typeNameParameterForVersion( mShared->mWFSVersion ), tname );
     //Property
     QDomElement propertyElem = transactionDoc.createElementNS( QgsWFSConstants::WFS_NAMESPACE, QStringLiteral( "Property" ) );
     QDomElement nameElem = transactionDoc.createElementNS( QgsWFSConstants::WFS_NAMESPACE, QStringLiteral( "Name" ) );
@@ -1040,6 +1040,7 @@ QString QgsWFSProvider::convertToXML( const QVariant &value )
   return valueStr;
 }
 
+
 bool QgsWFSProvider::changeAttributeValues( const QgsChangedAttributesMap &attr_map )
 {
   //find out typename from uri and strip namespace prefix
@@ -1065,7 +1066,7 @@ bool QgsWFSProvider::changeAttributeValues( const QgsChangedAttributesMap &attr_
     }
 
     QDomElement updateElem = transactionDoc.createElementNS( QgsWFSConstants::WFS_NAMESPACE, QStringLiteral( "Update" ) );
-    updateElem.setAttribute( QStringLiteral( "typeName" ), tname );
+    updateElem.setAttribute( QgsWFSUtils::typeNameParameterForVersion( mShared->mWFSVersion ), tname );
 
     QgsAttributeMap::const_iterator attMapIt = attIt.value().constBegin();
     for ( ; attMapIt != attIt.value().constEnd(); ++attMapIt )
@@ -1158,17 +1159,20 @@ QString QgsWFSProvider::translateMetadataValue( const QString &mdKey, const QVar
   {
     return value.toString();
   }
-};
+}
 
-bool QgsWFSProvider::describeFeatureType( QString &geometryAttribute, QgsFields &fields, QgsWkbTypes::Type &geomType )
+bool QgsWFSProvider::describeFeatureType( QString &geometryAttribute,
+    QgsFields &fields,
+    QgsWkbTypes::Type &geomType,
+    bool forceSingularTypeNames )
 {
   fields.clear();
 
   QgsWFSDescribeFeatureType describeFeatureType( mShared->mURI.uri() );
   if ( !describeFeatureType.requestFeatureType( mShared->mWFSVersion,
-       mShared->mURI.typeName() ) )
+       mShared->mURI.typeName(), forceSingularTypeNames ) )
   {
-    QgsMessageLog::logMessage( tr( "DescribeFeatureType failed for url %1: %2" ).
+    QgsMessageLog::logMessage( tr( "DescribeFeatureType network request failed for url %1: %2" ).
                                arg( dataSourceUri(), describeFeatureType.errorMessage() ), tr( "WFS" ) );
     return false;
   }
@@ -1180,7 +1184,7 @@ bool QgsWFSProvider::describeFeatureType( QString &geometryAttribute, QgsFields
   if ( !describeFeatureDocument.setContent( response, true, &errorMsg ) )
   {
     QgsDebugMsg( response );
-    QgsMessageLog::logMessage( tr( "DescribeFeatureType failed for url %1: %2" ).
+    QgsMessageLog::logMessage( tr( "DescribeFeatureType XML parse failed for url %1: %2" ).
                                arg( dataSourceUri(), errorMsg ), tr( "WFS" ) );
     return false;
   }
@@ -1189,11 +1193,19 @@ bool QgsWFSProvider::describeFeatureType( QString &geometryAttribute, QgsFields
                                   mShared->mURI.typeName(),
                                   geometryAttribute, fields, geomType, errorMsg ) )
   {
+    // If 2.0.0, let's assume it was a server that only accepted TYPENAME singular form
+    // and try with that ...
+    if ( ! forceSingularTypeNames && mShared->mWFSVersion.startsWith( '2' ) )
+    {
+      return QgsWFSProvider::describeFeatureType( geometryAttribute,
+             fields,
+             geomType,
+             true );
+    }
     QgsMessageLog::logMessage( tr( "Analysis of DescribeFeatureType response failed for url %1: %2" ).
                                arg( dataSourceUri(), errorMsg ), tr( "WFS" ) );
     return false;
   }
-
   return true;
 }
 
@@ -1241,6 +1253,20 @@ bool QgsWFSProvider::readAttributesFromSchema( QDomDocument &schemaDoc,
     }
     elementElement = elementElement.nextSiblingElement( QStringLiteral( "element" ) );
   }
+  // Try to get a complex type whose name contains the unprefixed typename
+  if ( elementTypeString.isEmpty() && complexTypeElement.isNull() )
+  {
+    const QDomNodeList complexElements = schemaElement.elementsByTagName( QStringLiteral( "complexType" ) );
+    for ( int i = 0; i < complexElements.size(); i++ )
+    {
+      if ( complexElements.at( i ).toElement().attribute( QStringLiteral( "name" ) ).contains( unprefixedTypename ) )
+      {
+        complexTypeElement = complexElements.at( i ).toElement();
+        break;
+      }
+    }
+  }
+  // Give up :(
   if ( elementTypeString.isEmpty() && complexTypeElement.isNull() )
   {
     // "http://demo.deegree.org/inspire-workspace/services/wfs?SERVICE=WFS&REQUEST=DescribeFeatureType&VERSION=2.0.0&TYPENAME=ad:Address"
@@ -1266,7 +1292,6 @@ bool QgsWFSProvider::readAttributesFromSchema( QDomDocument &schemaDoc,
     {
       errorMsg = tr( "Cannot find element '%1'" ).arg( unprefixedTypename );
     }
-
     return false;
   }
 
@@ -1337,29 +1362,33 @@ bool QgsWFSProvider::readAttributesFromSchema( QDomDocument &schemaDoc,
     QRegExp gmlRefProperty( "gml:(.*)Property" );
 
     // gmgml: is Geomedia Web Server
-    if ( type == QLatin1String( "gmgml:Polygon_Surface_MultiSurface_CompositeSurfacePropertyType" ) )
+    if ( ! foundGeometryAttribute && type == QLatin1String( "gmgml:Polygon_Surface_MultiSurface_CompositeSurfacePropertyType" ) )
     {
       foundGeometryAttribute = true;
       geometryAttribute = name;
       geomType = QgsWkbTypes::MultiPolygon;
     }
-    else if ( type == QLatin1String( "gmgml:LineString_Curve_MultiCurve_CompositeCurvePropertyType" ) )
+    else if ( ! foundGeometryAttribute && type == QLatin1String( "gmgml:LineString_Curve_MultiCurve_CompositeCurvePropertyType" ) )
     {
       foundGeometryAttribute = true;
       geometryAttribute = name;
       geomType = QgsWkbTypes::MultiLineString;
     }
     //is it a geometry attribute?
     // the GeometryAssociationType has been seen in #11785
-    else if ( type.indexOf( gmlPT ) == 0 || type == QLatin1String( "gml:GeometryAssociationType" ) )
+    else if ( ! foundGeometryAttribute && ( type.indexOf( gmlPT ) == 0 || type == QLatin1String( "gml:GeometryAssociationType" ) ) )
     {
       foundGeometryAttribute = true;
       geometryAttribute = name;
-      geomType = geomTypeFromPropertyType( geometryAttribute, gmlPT.cap( 1 ) );
+      // We have a choice parent element we cannot assume any valid information over the geometry type
+      if ( attributeElement.parentNode().nodeName() == QStringLiteral( "choice" ) && ! attributeElement.nextSibling().isNull() )
+        geomType = QgsWkbTypes::Unknown;
+      else
+        geomType = geomTypeFromPropertyType( geometryAttribute, gmlPT.cap( 1 ) );
     }
     //MH 090428: sometimes the <element> tags for geometry attributes have only attribute ref="gml:polygonProperty"
     //Note: this was deprecated with GML3.
-    else if ( ref.indexOf( gmlRefProperty ) == 0 )
+    else if ( ! foundGeometryAttribute &&  ref.indexOf( gmlRefProperty ) == 0 )
     {
       foundGeometryAttribute = true;
       geometryAttribute = ref.mid( 4 ); // Strip gml: prefix
@@ -1441,7 +1470,8 @@ QDomElement QgsWFSProvider::createTransactionElement( QDomDocument &doc ) const
     describeFeatureTypeURL = QUrl( QStringLiteral( "http://fake_qgis_http_endpoint" ) );
   describeFeatureTypeURL.addQueryItem( QStringLiteral( "REQUEST" ), QStringLiteral( "DescribeFeatureType" ) );
   describeFeatureTypeURL.addQueryItem( QStringLiteral( "VERSION" ), QStringLiteral( "1.0.0" ) );
-  describeFeatureTypeURL.addQueryItem( QStringLiteral( "TYPENAME" ), mShared->mURI.typeName() );
+  //TODO: proper support of 2.0.0, for now hardcoded
+  describeFeatureTypeURL.addQueryItem( QgsWFSUtils::typeNameParameterForVersion( WfsVersion ).toUpper(), mShared->mURI.typeName() );
 
   transactionElem.setAttribute( QStringLiteral( "xsi:schemaLocation" ), mApplicationNamespace + ' '
                                 + describeFeatureTypeURL.toEncoded() );

diff --git a/src/providers/wfs/qgswfsprovider.h b/src/providers/wfs/qgswfsprovider.h
@@ -151,7 +151,7 @@ class QgsWFSProvider : public QgsVectorDataProvider
        The method gives back the name of
        the geometry attribute and the thematic attributes with their types*/
     bool describeFeatureType( QString &geometryAttribute,
-                              QgsFields &fields, QgsWkbTypes::Type &geomType );
+                              QgsFields &fields, QgsWkbTypes::Type &geomType, bool forceSingularTypeNames = false );
 
     /**
      * For a given typename, reads the name of the geometry attribute, the

diff --git a/src/providers/wfs/qgswfsrequest.cpp b/src/providers/wfs/qgswfsrequest.cpp
@@ -96,10 +96,12 @@ bool QgsWfsRequest::sendGET( const QUrl &url, bool synchronous, bool forceRefres
     }
 #endif
     modifiedUrlString = modifiedUrlString.mid( 0, modifiedUrlString.indexOf( '?' ) ) + args;
-    QgsDebugMsg( QString( "Get %1 (after laundering)" ).arg( modifiedUrlString ) );
+    QgsDebugMsg( QStringLiteral( "Get %1 (after laundering)" ).arg( modifiedUrlString ) );
     modifiedUrl = QUrl::fromLocalFile( modifiedUrlString );
   }
 
+  QgsDebugMsgLevel( QStringLiteral( "Calling: %1" ).arg( modifiedUrl.toDisplayString( ) ), 4 );
+
   QNetworkRequest request( modifiedUrl );
   if ( !mUri.auth().setAuthorization( request ) )
   {

diff --git a/src/providers/wfs/qgswfsutils.cpp b/src/providers/wfs/qgswfsutils.cpp
@@ -138,6 +138,19 @@ bool QgsWFSUtils::removeDir( const QString &dirName )
   return dir.rmdir( dirName );
 }
 
+QString QgsWFSUtils::typeNameParameterForVersion( const QString &WfsVersion )
+{
+  // WFS 2.0 uses the plural form TYPENAMES
+  if ( WfsVersion.startsWith( '2' ) )
+  {
+    return QString( "typeNames" );
+  }
+  else
+  {
+    return QString( "typeName" );
+  }
+}
+
 
 // We use a keep alive mechanism where every KEEP_ALIVE_DELAY ms we update
 // a shared memory segment with the current timestamp. This way, other QGIS

diff --git a/src/providers/wfs/qgswfsutils.h b/src/providers/wfs/qgswfsutils.h
@@ -45,6 +45,9 @@ class QgsWFSUtils
     //! Return a unique identifier made from feature content
     static QString getMD5( const QgsFeature &f );
 
+    //! Return the correct form of typeName(s) according to the specified \a WfsVersion
+    static QString typeNameParameterForVersion( const QString &WfsVersion );
+
   protected:
     friend class QgsWFSUtilsKeepAlive;
     static QSharedMemory *createAndAttachSHM();
@@ -62,6 +65,7 @@ class QgsWFSUtils
 
     //! Remove (recursively) a directory.
     static bool removeDir( const QString &dirName );
+
 };
 
 //! For internal use of QgsWFSUtils