FilteredRequest.java

/* 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

package org.esigate.servlet.user;

import java.security.Principal;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;

/**
 * Wrapper to the response used inside the servlet filter to override some of the methods of the request.
 * 
 * @author Francois-Xavier Bonnet
 */
public class FilteredRequest extends HttpServletRequestWrapper {
    public FilteredRequest(HttpServletRequest request) {
        super(request);
    }

    /**
     * Returns the user defined as parameter "user" if present.
     */
    @Override
    public String getRemoteUser() {
        String user = getHeader("X_REMOTE_USER");
        if (user != null) {
            return user;
        } else {
            return super.getRemoteUser();
        }
    }

    @Override
    public Principal getUserPrincipal() {
        String user = getRemoteUser();
        if (user != null) {
            return new Principal() {
                @Override
                public String getName() {
                    return getRemoteUser();
                }
            };
        } else {
            return null;
        }
    }
}