de.qucosa.spring.RoleParameterAuthenticationFilter.java Source code

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Here is the source code for de.qucosa.spring.RoleParameterAuthenticationFilter.java

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/*
 * Copyright (C) 2013 SLUB Dresden
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package de.qucosa.spring;

import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.context.SecurityContext;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.stereotype.Component;
import org.springframework.web.filter.GenericFilterBean;

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

@Component
class RoleParameterAuthenticationFilter extends GenericFilterBean {

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
            throws IOException, ServletException {
        String role = request.getParameter("role");
        if (role != null) {
            SecurityContext sctx = SecurityContextHolder.getContext();
            if (sctx.getAuthentication() == null) {
                sctx.setAuthentication(new UsernamePasswordAuthenticationToken(role, role));
            }
        }
        chain.doFilter(request, response);
    }

}