On 01/20/2014 12:19 PM, Peter Len wrote:
> I am using QGIS Server that is running in my OSGeo Apache web server (on
> Windows 7). Not sure what version the QGIS Server is but it was from the
> latest OSGeo4W installer. I was testing an OpenLayers client to view a QGIS
> Desktop project file over WMS from the QGIS Server. All seems good with
> that. For example, my OpenLayers code to get this looks like:
>
> var url = "http://localhost:8090/qgis/qgis_mapserv.fcgi.exe";;
> var layer = new OpenLayers.Layer.WMS( "Main Layer", url, {
> layers: 'table_poly,location_view',
> format: 'image/png',
> },
> {
> buffer: 1,
> isBaseLayer: true,
> graphicZIndex: 0,
> }
> );
> map.addLayers([layer]);
>
> With the above, I can view my layers within OpenLayers. My next test was to
> see if I could get the feature info from items on my layers. I found an
> example of how to make this call in OpenLayers and it looks like:
>
> var info = new OpenLayers.Control.WMSGetFeatureInfo({
> url: url,
> title: 'Identify features by clicking',
> queryVisible: true,
> eventListeners: {
> getfeatureinfo: function(event) {
> alert("Got feature info");
>
> }
> }
> });
> map.addControl(info);
> info.activate();
>
> When I tried this, I didn't get anything except a spinning cursor. I then
> tried another test to see if that was the correct way to ask for feature info
> so I changed the URL for the layers to get the layers from my GeoServer
> rather than from QGIS Server (the project file got these layers initially
> from GeoServer so we are talking about the same layer source). That worked
> just fine and I was able to get individual feature information. After
> switching back to point to my QGIS Server I started to look at the Apache web
> server logs and the GeoServer output screen. The Apache logs didn't list
> anything related but the GeoServer console listed the following:
>
WMS GetFeatureInfo in OpenLayers does in fact work with QGIS Server with
one trick, vendorParams you need to specify the qgs file to reference.
infoControls = {
click: new OpenLayers.Control.WMSGetFeatureInfo({
url: "http://yoursite.com/cgi-bin/qgis_mapserv.fcgi";,
title: 'Identify features by clicking',
layers: [yourlayer],
queryVisible: true,
vendorParams:{map:"/path/to/map/project.qgs"}
}),
Thanks,
Alex
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