geoserver - SLD_BODY in WMS Layer params is not working

I am trying to set style to my WMS layer in my script like this :

http://opendem.info/ol3/wms_sld.html

but I got nothing.

This is my code :

var sldBody = 'opengeo_arbousiers2    #0033cc    ';
var map = new ol.Map({
  layers: [  new ol.layer.Image({
          source: new ol.source.ImageWMS({
            url: 'http://localhost:8080/geoserver/opengeo/wms',
            params: {'LAYERS': 'opengeo:regions1','SLD_BODY' :sldBody},
            serverType: 'geoserver'
          })})],
  target: document.getElementById('map'),
  view: new ol.View({

    center: [-1095791.453557, 3422374.879112],
    maxZoom: 19,
    zoom: 5
  })
});

Answer

You are attempting to use SLD in library mode which imposes some additional rules on the operation from normal.

So assuming that your SLD is valid and works when used normally, you must ensure that your request contains the name of the layer and the name of the style and that this matches the names in the SLD file you provide or isDefault is set to true.

In your request you don't specify a Style name nor do you set isDefault in the SLD, you also don't have matching layer names (opengeo:regions1 vs opengeo_arbousiers2) so GeoServer will ignore the SLD you have provided.