GeoServer 2.3 how to enable jsonp

Question

I'd like to enable jsonp on GeoServer 2.3.0. The docs say to set ENABLE_JSONP to true.

A response from the GeoServer users list says to edit web.xml, (set System variable ENABLE_JSONP=true and outFormat=text/javascript )but I have no idea which xml tags to use and where to put it.

Here are installed versions: GeoServer 2.3.0 (Web Archive)has been installed on a remote host with tomcat 7.0.39

Answer 1

I got some help on the GeoServer users list.

Add to this file: /tomcat/webapps/geoserver/WEB-INF/web.xml

<context-param>
    <param-name>ENABLE_JSONP</param-name>
    <param-value>true</param-value>
</context-param>

and restart the service. Then, in your json request use format=text/javascript

Here's the code I used to request the WFS features from GeoServer. I'm using the Leaflet API along with jquery.

var rootUrl = 'http://tomcat.capecodgis.com/geoserver/capecodgis/ows';

var defaultParameters = {
    service: 'WFS',
    version: '1.0.0',
    request: 'GetFeature',
    typeName: 'capecodgis:monitor_station',
    maxFeatures: 200,
    outputFormat: 'text/javascript',
    format_options: 'callback: getJson'

};

var parameters = L.Util.extend(defaultParameters);

$.ajax({
    url: rootUrl + L.Util.getParamString(parameters),
    dataType: 'jsonp',
    jsonpCallback: 'getJson',
    success: handleJson
});


function handleJson(data) {
    L.geoJson(data, {
        onEachFeature: onEachFeature,
        pointToLayer: function (feature, latlng) {
            return L.circleMarker(latlng, geojsonMarkerOptions);
            //return L.marker(latlng);
        }
    }).addTo(map);
}

Hopes this gets you started and feel free to ask for more info.

Answer 2

In order to improve readability you can also put the params directly into the AJAX call.

With the JSONP call you won't need the format_options or the success parameter. The callback function will be set with jsonpCallback parameter on the AJAX call and the format_options will be set with jsonp:'format_options'.

    $.ajax('http://demo.opengeo.org/geoserver/wfs',{
        type: 'GET',
        data: {
            service: 'WFS',
            version: '1.0.0',
            request: 'GetFeature',
            typeName: 'capecodgis:monitor_station',
            maxFeatures: 200,
            outputFormat: 'text/javascript',
            request: 'GetFeature',
            srsname: 'EPSG:3857',
            bbox: extent.join(',') + ',EPSG:3857'
            },
        dataType: 'jsonp',
        jsonpCallback:'callback:handleJson',
        jsonp:'format_options'
        });
    },