restxq returning json with cors header

json-test.xqm

(:~
 : JSON test apb feb 2017
 :)

module namespace page = 'json-test';

(: test data :)
declare variable $page:data:=<json objects="json _">
  <total type="number">15</total>
  <entity>app</entity>
  <items type="array">
    <_>
      <name type="string">abide</name>
      <uri type="string">/abide</uri>
      <description type="string">todo this</description>
    </_>
  </items>
</json>
;
(:~ CORS header  :) 
declare function page:headers(){
<restxq:response>
    <http:response>
        <http:header name="Access-Control-Allow-Origin" value="*"/>
    </http:response>
</restxq:response>
}; 

declare %rest:path("/json") 
%output:method("json")
function page:json(){ 
	(page:headers(),
	$page:data
	)
};