[Server][Feature][needs-docs] Update WMTS service: Add GetFeatureInfo

Support GetFeatureInfo Request in WMTS.
qgis · Aug 20, 2018 · cff8469 · cff8469
1 parent dc7e8e4
commit cff8469
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Showing 8 changed files with 315 additions and 181 deletions.
diff --git a/src/server/services/wmts/CMakeLists.txt b/src/server/services/wmts/CMakeLists.txt
@@ -7,6 +7,7 @@ SET (wmts_SRCS
   qgswmtsutils.cpp
   qgswmtsgetcapabilities.cpp
   qgswmtsgettile.cpp
+  qgswmtsgetfeatureinfo.cpp
 )
 
 ########################################################

diff --git a/src/server/services/wmts/qgswmts.cpp b/src/server/services/wmts/qgswmts.cpp
@@ -19,6 +19,7 @@
 #include "qgswmtsutils.h"
 #include "qgswmtsgetcapabilities.h"
 #include "qgswmtsgettile.h"
+#include "qgswmtsgetfeatureinfo.h"
 
 #define QSTR_COMPARE( str, lit )\
   (str.compare( QStringLiteral( lit ), Qt::CaseInsensitive ) == 0)
@@ -82,6 +83,10 @@ namespace QgsWmts
         {
           writeGetTile( mServerIface, project, versionString, request, response );
         }
+        else if ( QSTR_COMPARE( req, "GetFeatureInfo" ) )
+        {
+          writeGetFeatureInfo( mServerIface, project, versionString, request, response );
+        }
         else
         {
           // Operation not supported

diff --git a/src/server/services/wmts/qgswmtsgetcapabilities.cpp b/src/server/services/wmts/qgswmtsgetcapabilities.cpp
@@ -302,9 +302,9 @@ namespace QgsWmts
     operationsMetadataElement.appendChild( getTileElement );
 
     //ows:Operation element with name GetFeatureInfo
-    /*QDomElement getFeatureInfoElement = getCapabilitiesElement.cloneNode().toElement();//this is the same as 'GetCapabilities'
+    QDomElement getFeatureInfoElement = getCapabilitiesElement.cloneNode().toElement();//this is the same as 'GetCapabilities'
     getFeatureInfoElement.setAttribute( QStringLiteral( "name" ), QStringLiteral( "GetFeatureInfo" ) );
-    operationsMetadataElement.appendChild( getFeatureInfoElement );*/
+    operationsMetadataElement.appendChild( getFeatureInfoElement );
 
     // End
     return operationsMetadataElement;
@@ -327,6 +327,8 @@ namespace QgsWmts
       QgsCoordinateReferenceSystem wgs84 = QgsCoordinateReferenceSystem::fromOgcWmsCrs( GEO_EPSG_CRS_AUTHID );
       QList<tileMatrixSet>::iterator tmsIt = tmsList.begin();
 
+      QStringList nonIdentifiableLayers = project->nonIdentifiableLayers();
+
       // WMTS Project configuration
       bool wmtsProject = project->readBoolEntry( QStringLiteral( "WMTSLayers" ), QStringLiteral( "Project" ) );
 
@@ -371,6 +373,10 @@ namespace QgsWmts
         if ( wmtsJpegProject )
           pLayer.formats << QStringLiteral( "image/jpeg" );
 
+        // Project is not queryable in WMS
+        //pLayer.queryable = ( nonIdentifiableLayers.count() != project->count() );
+        pLayer.queryable = false;
+
         wmtsLayers.append( pLayer );
       }
 
@@ -401,11 +407,12 @@ namespace QgsWmts
 
           pLayer.abstract = treeGroup->customProperty( QStringLiteral( "wmsAbstract" ) ).toString();
 
+          QgsRectangle wgs84BoundingRect;
+          bool queryable = false;
           for ( QgsLayerTreeLayer *layer : treeGroup->findLayers() )
           {
             QgsMapLayer *l = layer->layer();
             //transform the layer native CRS into WGS84
-            QgsRectangle wgs84BoundingRect;
             QgsCoordinateReferenceSystem layerCrs = l->crs();
             Q_NOWARN_DEPRECATED_PUSH
             QgsCoordinateTransform exGeoTransform( layerCrs, wgs84 );
@@ -418,7 +425,13 @@ namespace QgsWmts
             {
               wgs84BoundingRect.combineExtentWith( QgsRectangle( -180, -90, 180, 90 ) );
             }
+            if ( !queryable && !nonIdentifiableLayers.contains( l->id() ) )
+            {
+              queryable = true;
+            }
           }
+          pLayer.wgs84BoundingRect = wgs84BoundingRect;
+          pLayer.queryable = queryable;
 
           // Formats
           if ( wmtsPngGroupNameList.contains( gName ) )
@@ -477,9 +490,19 @@ namespace QgsWmts
         if ( wmtsJpegLayerIdList.contains( lId ) )
           pLayer.formats << QStringLiteral( "image/jpeg" );
 
+        pLayer.queryable = ( !nonIdentifiableLayers.contains( l->id() ) );
+
         wmtsLayers.append( pLayer );
       }
 
+      // Append InfoFormat helper
+      std::function < void ( QDomElement &, const QString & ) > appendInfoFormat = [&doc]( QDomElement & elem, const QString & format )
+      {
+        QDomElement formatElem = doc.createElement( QStringLiteral( "InfoFormat" )/*wmts:InfoFormat*/ );
+        formatElem.appendChild( doc.createTextNode( format ) );
+        elem.appendChild( formatElem );
+      };
+
       Q_FOREACH ( layerDef wmtsLayer, wmtsLayers )
       {
         if ( wmtsLayer.id.isEmpty() )
@@ -542,6 +565,15 @@ namespace QgsWmts
           layerElem.appendChild( layerFormatElem );
         }
 
+        if ( wmtsLayer.queryable )
+        {
+          appendInfoFormat( layerElem, QStringLiteral( "text/plain" ) );
+          appendInfoFormat( layerElem, QStringLiteral( "text/html" ) );
+          appendInfoFormat( layerElem, QStringLiteral( "text/xml" ) );
+          appendInfoFormat( layerElem, QStringLiteral( "application/vnd.ogc.gml" ) );
+          appendInfoFormat( layerElem, QStringLiteral( "application/vnd.ogc.gml/3.1.1" ) );
+        }
+
         tmsIt = tmsList.begin();
         for ( ; tmsIt != tmsList.end(); ++tmsIt )
         {

diff --git a/src/server/services/wmts/qgswmtsgetfeatureinfo.cpp b/src/server/services/wmts/qgswmtsgetfeatureinfo.cpp
@@ -0,0 +1,52 @@
+/***************************************************************************
+                            qgswmsgetfeatureinfo.cpp
+                            -------------------------
+  begin                : July 23 , 2017
+  copyright            : (C) 2018 by René-Luc D'Hont
+  email                : rldhont at 3liz dot com
+ ***************************************************************************/
+
+/***************************************************************************
+ *                                                                         *
+ *   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 "qgswmtsutils.h"
+#include "qgswmtsgetfeatureinfo.h"
+
+#include <QImage>
+
+namespace QgsWmts
+{
+
+  void writeGetFeatureInfo( QgsServerInterface *serverIface, const QgsProject *project,
+                            const QString &version, const QgsServerRequest &request,
+                            QgsServerResponse &response )
+  {
+    Q_UNUSED( version );
+
+    QgsServerRequest::Parameters params = request.parameters();
+
+    // WMS query
+    QUrlQuery query = translateWmtsParamToWmsQueryItem( QStringLiteral( "GetFeatureInfo" ), params, project, serverIface );
+
+    // GetFeatureInfo query items
+    query.addQueryItem( QStringLiteral( "query_layers" ), query.queryItemValue( QStringLiteral( "layers" ) ) );
+    query.addQueryItem( QStringLiteral( "i" ), params.value( QStringLiteral( "I" ) ) );
+    query.addQueryItem( QStringLiteral( "j" ), params.value( QStringLiteral( "J" ) ) );
+    query.addQueryItem( QStringLiteral( "info_format" ), params.value( QStringLiteral( "INFOFORMAT" ) ) );
+
+    QgsServerParameters wmsParams( query );
+    QgsServerRequest wmsRequest( "?" + query.query( QUrl::FullyDecoded ) );
+    QgsService *service = serverIface->serviceRegistry()->getService( wmsParams.service(), wmsParams.version() );
+    service->executeRequest( wmsRequest, response, project );
+  }
+
+} // namespace QgsWmts
+
+
+
+
diff --git a/src/server/services/wmts/qgswmtsgetfeatureinfo.h b/src/server/services/wmts/qgswmtsgetfeatureinfo.h
@@ -0,0 +1,28 @@
+/***************************************************************************
+                              qgswmsgetfeatureinfo.h
+                              -------------------------
+  begin                : July 23 , 2017
+  copyright            : (C) 2018 by René-Luc D'Hont
+  email                : rldhont at 3liz dot com
+ ***************************************************************************/
+
+/***************************************************************************
+ *                                                                         *
+ *   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.                                   *
+ *                                                                         *
+ ***************************************************************************/
+
+namespace QgsWmts
+{
+
+  /**
+   * Output GetFeatureInfo response
+   */
+  void writeGetFeatureInfo( QgsServerInterface *serverIface, const QgsProject *project,
+                            const QString &version,  const QgsServerRequest &request,
+                            QgsServerResponse &response );
+
+} // namespace QgsWmts
diff --git a/src/server/services/wmts/qgswmtsgettile.cpp b/src/server/services/wmts/qgswmtsgettile.cpp
@@ -30,184 +30,8 @@ namespace QgsWmts
 
     QgsServerRequest::Parameters params = request.parameters();
 
-    //defining Layer
-    QString layer;
-    //read Layer
-    QMap<QString, QString>::const_iterator layer_it = params.constFind( QStringLiteral( "LAYER" ) );
-    if ( layer_it != params.constEnd() )
-    {
-      layer = layer_it.value();
-    }
-    else
-    {
-      throw QgsRequestNotWellFormedException( QStringLiteral( "Layer is mandatory" ) );
-    }
-
-    //defining Format
-    QString format;
-    //read Format
-    QMap<QString, QString>::const_iterator format_it = params.constFind( QStringLiteral( "FORMAT" ) );
-    if ( format_it != params.constEnd() )
-    {
-      format = format_it.value();
-    }
-    else
-    {
-      throw QgsRequestNotWellFormedException( QStringLiteral( "Format is mandatory" ) );
-    }
-
-    QList< tileMatrixSet > tmsList = getTileMatrixSetList( project );
-    if ( tmsList.isEmpty() )
-    {
-      throw QgsServiceException( QStringLiteral( "UnknownError" ),
-                                 QStringLiteral( "Service not well configured" ) );
-    }
-
-    //defining TileMatrixSet ref
-    QString tms_ref;
-    //read TileMatrixSet
-    QMap<QString, QString>::const_iterator tms_ref_it = params.constFind( QStringLiteral( "TILEMATRIXSET" ) );
-    if ( tms_ref_it != params.constEnd() )
-    {
-      tms_ref = tms_ref_it.value();
-    }
-    else
-    {
-      throw QgsRequestNotWellFormedException( QStringLiteral( "TileMatrixSet is mandatory" ) );
-    }
-
-    bool tms_ref_valid = false;
-    tileMatrixSet tms;
-    QList<tileMatrixSet>::iterator tmsIt = tmsList.begin();
-    for ( ; tmsIt != tmsList.end(); ++tmsIt )
-    {
-      tileMatrixSet &tmsi = *tmsIt;
-      if ( tmsi.ref == tms_ref )
-      {
-        tms_ref_valid = true;
-        tms = tmsi;
-        break;
-      }
-    }
-    if ( !tms_ref_valid )
-    {
-      throw QgsRequestNotWellFormedException( QStringLiteral( "TileMatrixSet is unknown" ) );
-    }
-
-    bool conversionSuccess = false;
-
-    //difining TileMatrix idx
-    int tm_idx;
-    //read TileMatrix
-    QMap<QString, QString>::const_iterator tm_ref_it = params.constFind( QStringLiteral( "TILEMATRIX" ) );
-    if ( tm_ref_it != params.constEnd() )
-    {
-      QString tm_ref = tm_ref_it.value();
-      tm_idx = tm_ref.toInt( &conversionSuccess );
-      if ( !conversionSuccess )
-      {
-        throw QgsRequestNotWellFormedException( QStringLiteral( "TileMatrix is unknown" ) );
-      }
-    }
-    else
-    {
-      throw QgsRequestNotWellFormedException( QStringLiteral( "TileMatrix is mandatory" ) );
-    }
-    if ( tms.tileMatrixList.count() < tm_idx )
-    {
-      throw QgsRequestNotWellFormedException( QStringLiteral( "TileMatrix is unknown" ) );
-    }
-    tileMatrix tm = tms.tileMatrixList.at( tm_idx );
-
-    //defining TileRow
-    int tr;
-    //read TileRow
-    QMap<QString, QString>::const_iterator tr_it = params.constFind( QStringLiteral( "TILEROW" ) );
-    if ( tr_it != params.constEnd() )
-    {
-      QString tr_str = tr_it.value();
-      conversionSuccess = false;
-      tr = tr_str.toInt( &conversionSuccess );
-      if ( !conversionSuccess )
-      {
-        throw QgsRequestNotWellFormedException( QStringLiteral( "TileRow is unknown" ) );
-      }
-    }
-    else
-    {
-      throw QgsRequestNotWellFormedException( QStringLiteral( "TileRow is mandatory" ) );
-    }
-    if ( tm.row <= tr )
-    {
-      throw QgsRequestNotWellFormedException( QStringLiteral( "TileRow is unknown" ) );
-    }
-
-    //defining TileCol
-    int tc;
-    //read TileCol
-    QMap<QString, QString>::const_iterator tc_it = params.constFind( QStringLiteral( "TILECOL" ) );
-    if ( tc_it != params.constEnd() )
-    {
-      QString tc_str = tc_it.value();
-      conversionSuccess = false;
-      tc = tc_str.toInt( &conversionSuccess );
-      if ( !conversionSuccess )
-      {
-        throw QgsRequestNotWellFormedException( QStringLiteral( "TileCol is unknown" ) );
-      }
-    }
-    else
-    {
-      throw QgsRequestNotWellFormedException( QStringLiteral( "TileCol is mandatory" ) );
-    }
-    if ( tm.col <= tc )
-    {
-      throw QgsRequestNotWellFormedException( QStringLiteral( "TileCol is unknown" ) );
-    }
-
-    int tileWidth = 256;
-    int tileHeight = 256;
-    double res = tm.resolution;
-    double minx = tm.left + tc * ( tileWidth * res );
-    double miny = tm.top - ( tr + 1 ) * ( tileHeight * res );
-    double maxx = tm.left + ( tc + 1 ) * ( tileWidth * res );
-    double maxy = tm.top - tr * ( tileHeight * res );
-    QString bbox;
-    if ( tms.ref == "EPSG:4326" )
-    {
-      bbox = qgsDoubleToString( miny, 6 ) + ',' +
-             qgsDoubleToString( minx, 6 ) + ',' +
-             qgsDoubleToString( maxy, 6 ) + ',' +
-             qgsDoubleToString( maxx, 6 );
-    }
-    else
-    {
-      bbox = qgsDoubleToString( minx, 6 ) + ',' +
-             qgsDoubleToString( miny, 6 ) + ',' +
-             qgsDoubleToString( maxx, 6 ) + ',' +
-             qgsDoubleToString( maxy, 6 );
-    }
-
-    QUrlQuery query;
-    if ( !params.value( QStringLiteral( "MAP" ) ).isEmpty() )
-    {
-      query.addQueryItem( QStringLiteral( "map" ), params.value( QStringLiteral( "MAP" ) ) );
-    }
-    query.addQueryItem( QStringLiteral( "service" ), QStringLiteral( "WMS" ) );
-    query.addQueryItem( QStringLiteral( "version" ), QStringLiteral( "1.3.0" ) );
-    query.addQueryItem( QStringLiteral( "request" ), QStringLiteral( "GetMap" ) );
-    query.addQueryItem( QStringLiteral( "layers" ), layer );
-    query.addQueryItem( QStringLiteral( "styles" ), QString() );
-    query.addQueryItem( QStringLiteral( "crs" ), tms.ref );
-    query.addQueryItem( QStringLiteral( "bbox" ), bbox );
-    query.addQueryItem( QStringLiteral( "width" ), QStringLiteral( "256" ) );
-    query.addQueryItem( QStringLiteral( "height" ), QStringLiteral( "256" ) );
-    query.addQueryItem( QStringLiteral( "format" ), format );
-    if ( format.startsWith( QStringLiteral( "image/png" ) ) )
-    {
-      query.addQueryItem( QStringLiteral( "transparent" ), QStringLiteral( "true" ) );
-    }
-    query.addQueryItem( QStringLiteral( "dpi" ), QStringLiteral( "96" ) );
+    // WMS query
+    QUrlQuery query = translateWmtsParamToWmsQueryItem( QStringLiteral( "GetMap" ), params, project );
 
     QgsServerParameters wmsParams( query );
     QgsServerRequest wmsRequest( "?" + query.query( QUrl::FullyDecoded ) );