java - How to get session variables ina CORS filter -

i using cors filter in java spring application can expose rest api. not able set session variables filter. null.

in filter added:

((httpservletresponse)response).addheader("access-control-allow-origin", "*"); ((httpservletresponse)response).addheader("access-control-allow-methods", "post, get, options, delete"); chain.dofilter(request, response); 

how can maintain session inside this. if use rest client browser, working.