Monday, 13 July 2015

geoserver - How to add CQL filter into GetFeatureInfo request in OpenLayers


I have made a WMS layer using Openlayers2 and Geoserver and I display the layeer using a specific CQL filter.


Now I want to use a WMSGetFeatureInfo request in order to get specific data on click. Although I use the CQL parameters in my WMSGetFeatureInfo request nothing seems to change and I get back all the results.


This is my code:


First I create the layer and added to the map:


        cql = "ftth_pop='"+ area+"' AND simul_desc='"+simulation+"'";
        layerName2 = 'ngn_marco:out_ducts';

        wms =  new OpenLayers.Layer.WMS("wms","http://ngn-marco.enomix.gr/geo_wms/",
                {
                    layers: layerName2,
                    format:  "image/png",
                    transparent: true,
                    version: "1.1.1",
                    CQL_FILTER: cql,
                    tiled: true 
                },
                {

                    format: "image/png",
                    displayOutsideMaxExtent: false,
                    projection: new OpenLayers.Projection("EPSG:900913"),
                    visibility: true
                }
        );  

       map.addLayer(wms);

Then I make the WMSGetFeatureInfo request:



      infoControls = {
        click: new OpenLayers.Control.WMSGetFeatureInfo({
            url: 'http://ngn-marco.enomix.gr/geo_wms/', 
            title: 'Identify features by clicking',
            layer: wms,
            CQL_FILTER: cql,
            queryVisible: true
            })
        };


I add the control and activate it as:


    for (var i in infoControls) { 
        infoControls[i].events.register("getfeatureinfo", this, showInfo);
        map.addControl(infoControls[i]); 
    }

    infoControls.click.activate();

The showInfo() function is:


function showInfo(evt) {

        if (evt.features && evt.features.length) {
            highlightLayer.destroyFeatures();
            highlightLayer.addFeatures(evt.features);
            highlightLayer.redraw();
        } else {
            //console.log(evt.txt);
            document.getElementById('responseText').innerHTML = evt.text;
    }
    }


The problem is that the CQL filter for the WMSGetFeatureInfo request doesnt work.


EDIT


These are the parameters sent to Geoserver:


BBOX    2637105.178295,4616485.137413,2638971.913845,4617560.033123
FEATURE_COUNT   10
FORMAT  image/png
HEIGHT  900
INFO_FORMAT text/html
LAYERS  ngn_marco:out_ducts
QUERY_LAYERS    ngn_marco:out_ducts

REQUEST GetFeatureInfo
SERVICE WMS
SRS EPSG:900913
STYLES  
VERSION 1.1.1
WIDTH   1563
X   715
Y   325

And this is part of the response I get back:



  
    
     Geoserver GetFeatureInfo output