Re: [Geoserver-users] GML via GetFeatureInfo -- what newbie thing am I missing?

[Andrea A. <aa...@op...>]

Rick Wayne ha scritto:
> Hullo all,
> 
> I'm using GeoServer with an OpenLayers client, and I want to implement a 
> "zoom-to-clicked-polygon" feature. I just need the bounding box for the 
> clicked feature, which I know I can obtain with a GetFeatureInfo call. 
> The following is pretty straight from the click handler example on 
> openlayers.org:
> 
>            OpenLayers.Util.getElement('nodelist').innerHTML = 
> "Loading... please wait...";
>             var url =  map.layers[0].getFullRequestString({
>                             REQUEST: "GetFeatureInfo",
>                             EXCEPTIONS: "application/vnd.ogc.se_xml",
>                             BBOX: map.getExtent().toBBOX(),
>                             X: e.xy.x,
>                             Y: e.xy.y,
>                             INFO_FORMAT: 'text/plain',
>                             QUERY_LAYERS: map.layers[0].params.LAYERS,
>                             FEATURE_COUNT: 1,
>                             srs: 'EPSG:26916',
>                             styles: '',
>                             layers: 'mmas:cities',
>                             WIDTH: map.size.w,
>                             HEIGHT: map.size.h},
>                             "http://my.server/geoserver/wms"
>                             );
>             OpenLayers.loadURL(url, '', this, setHTML, setHTML);
>             Event.stop(e);
>       });
>       }
> 
> Then the setHTML function does nifty things with the response parameter.
> 
> Now, if I change the INFO_FORMAT to 'application/vnd.ogc.gml', I can 
> obtain GML from the server which contains the bounding box I want. I've 
> tested this by obtaining the URL constructed by the call above (after 
> the INFO_FORMAT swap), and poking it into a browser. Boom, back comes 
> nice XML. In my JavaScript...not so much, null response.responseXML.
> 
> I have seen references in my searching to setting DUMP to true on layers 
> and the template to 'foo' or 'dummy', but all that discussion referred 
> to that as if it were a WKT (Well-Known Technique) and so didn't 
> specify /where/ one goes about setting these nice things.

Dump=true is a setting that's required for MapServer to properly
honor GetFeatureInfo, in GeoServer there is no equivalent.
However, if the request works by itself and does not when run from
OL, I believe you'll have to ask on the OL-users ml.

Cheers
Andrea