Atmosphere/atmosphere — pull request #1172 by sdnetwork (2013-07-01 22:27:41+00:00)
Title: Copy the Principal object of the httpservletrequest when the initial request is cloned

Permit to retrieve the authenticated user in websocket connection

more detail here :

https://groups.google.com/forum/?fromgroups=#!topic/atmosphere-framework/-wBK7DS93Z0