Using WMS external SLD with OpenLayers application

Question

I want to use external SLD file in my OpenLayers application. So I created WMS layer like this:

 var ly= new OpenLayers.Layer.WMS("mylyer",
 serverurl,
 {
 layers: "PGS:geopoint",
 transparent:true,
 style:"",
 sld: "http://localhost/app/style/point.xml"
 },
 { 
 isBaseLayer: false,
 buffer:0
 });

This is not working. This is returning null images. If I send request from browser (not openlayers) it returns error:

java.net.ConnectException: Connection refused Connection refused

• andytilia: Is your server running? What do you get when you put http://localhost/app/style/point.xml into your browser address bar? Is it different if you add a port, like this: http://localhost:8080/app/style/point.xml

Answer 1

http://localhost/ will be interpreted by the WMS server as its own host, but the SLD you want to use is on your app's host (let's say http://myapp.com/. So yo will have to change your SLD URL to the app's public URL (using its FQDN), e.g. http://myapp.com/style/point.xml:

 {
 layers: "PGS:geopoint",
 transparent:true,
 style:"",
 sld: "http://myapp.com/style/point.xml/point.xml"
 },

Depending on your WMS implementation, there may be a shortcut if both the WMS and the app run on the same host, e.g. a relative URL or a file URL, but using the FQDN of the app host is the safest way to go.