Question

I have two servers
one is just for authentication and forward request with userId in header parameter
other server runs application on JSF (1.2).
how can I retrieve parameter from request and put in backing beans.

Answer 1

I do something similar for a single sign on authentication module. A proxy server inserts a username into the HTTP request header. This can be retrieved from the FacesContext like so:

Map<String, String> requestHeaders = context.getExternalContext().getRequestHeaderMap();
String userName = requestHeaders.get(requestHeaderName);