Call javascript webscript from contoller

1. Create file at location - /source/web/components/documentlibrary/any-action.js

var nodeRef = record.node.linkedNode.nodeRef.replace(":/", "");

var me = this;

Alfresco.util.Ajax.request(

{

url: Alfresco.constants.PROXY_URI + "api/extensions/getPath/" + nodeRef,

method: Alfresco.util.Ajax.GET,

requestContentType: Alfresco.util.Ajax.JSON,

successCallback:{

fn: function changePath(response)

            {

if (response.json !== undefined)

{

var json = response.json;

var displayPath = json.displayPath;

var nodeRef = record.node.linkedNode.nodeRef;

var name = record.node.linkedNode.properties["cm:name"];

var pathInfo = displayPath.match("\/Sites\/([^\/]*)\/");                 

}

},

scope: me

            }

 });

2. Create file at location:
/config/alfresco/extension/templates/webscripts/com/test/util/displayPath/displayPath.get.desc.xml

<webscript>

   <shortname>Get Display Path</shortname>

   <description>Get the display path for a node</description>

   <url>/api/extensions/getPath/{item_store_type}/{item_store_id}/{item_id}</url>

   <format default="json"/>

   <authentication>user</authentication>

</webscript>

3. Create file at location:

/config/alfresco/extension/templates/webscripts/com/test/util/displayPath/displayPath.get.js

model.nodeRef = url.templateArgs.item_store_type;

model.nodeRef = model.nodeRef + "://" + url.templateArgs.item_store_id;

model.nodeRef = model.nodeRef + "/" + url.templateArgs.item_id;

var node = search.findNode(model.nodeRef);

if(node!=null) model.displayPath = node.displayPath;

else model.displayPath = null;

4. Create file at location:

/config/alfresco/extension/templates/webscripts/com/test/util/displayPath/displayPath.get.json.ftl

{

      "displayPath": "${displayPath}"

}