GeoServer 2.4.1: How to use JSONP in a WFS request?

Question

I've read that I can enable JSONP by setting ENABLE_JSONP in web.xml:

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

And I've read you can set outputFormat=json&format_options=callback:myCallback but I only get json back. Is this functionality broken/reverted? I'm on Windows 8.1.

Answer 1

I got it to work using Geoserver 2.3 and Leaflet with WFS 1.0.0 here.

When I changed to version 1.1.0 and 2.0.0 it returned the same json object as 1.0.0 but neither rendered on the map. Not sure why and it's a bit beyond me.

Here's what I'm using:

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);
}

Hope this helps

Answer 2

According to this document outputFormat=json is only included for backward compatibility and you should use outputFormat=text/javascript for a JSONP response.

Answer 3

The problem is that the success function is not called with the JSONP call. You need to change the AJAX call accordingly. You need to set jsonp:'format_options' on the AJAX call. The callback is then in the jsonpCallback parameter.

    $.ajax('http://demo.opengeo.org/geoserver/wfs',{
        type: 'GET',
        data: {
            service: 'WFS',
            version: '1.1.0',
            request: 'GetFeature',
            typename: 'osm:water_areas',
            srsname: 'EPSG:3857',
            outputFormat: 'text/javascript',
            bbox: extent.join(',') + ',EPSG:3857'
            },
        dataType: 'jsonp',
        jsonpCallback:'callback:loadFeatures',
        jsonp:'format_options'
        });
    }