ClientDbFilter.java

package it.inaf.ia2.gms.authn;

import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;

public class ClientDbFilter implements Filter {

    private static final String CLIENT_DB = "client_db";

    @Override
    public void doFilter(ServletRequest req, ServletResponse res, FilterChain fc) throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) req;
        String clientDb = request.getParameter(CLIENT_DB);
        if (clientDb != null) {
            request.getSession().setAttribute(CLIENT_DB, clientDb);
        }
        fc.doFilter(req, res);
    }
}