Get session by id in ajax call

Question

Is there a way to have access to session in a AJAX call made to a JAVA server.

On the server, the request object has both the session and cookies properties NULL.

I can pass though the session id as a parameter, but how can I access the session by ID?

Edit

Using session.getSession(false); returns null, while session.getSession(true); obviously returns a new session, with another id.

Answer 1

The best way to deal with this is to append ";jsessionid=" at the end of the url. For instance, in a jsp:

<script type="text/javascript">
...
    xhr.open("GET", url + ";jsessionid=<%=pageContext.getSession().getId()%>"); 
...
</script>

The line:

xhr.open("GET", url + ";jsessionid=<%=pageContext.getSession().getId()%>");

is rendered as:

xhr.open("GET", url + ";jsessionid=6EBA4F94838796DC6D653DCA1DD06373");