src/main/java/org/apache/directory/fortress/rest/SecurityOutFaultInterceptor.java

/*
 *   Licensed to the Apache Software Foundation (ASF) under one
 *   or more contributor license agreements.  See the NOTICE file
 *   distributed with this work for additional information
 *   regarding copyright ownership.  The ASF licenses this file
 *   to you 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.apache.directory.fortress.rest;

import org.apache.cxf.interceptor.Fault;
import org.apache.cxf.interceptor.security.AccessDeniedException;
import org.apache.cxf.message.Message;
import org.apache.cxf.phase.AbstractPhaseInterceptor;
import org.apache.cxf.phase.Phase;
import org.apache.cxf.transport.http.AbstractHTTPDestination;

import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * Utility for Fortress Rest Server.  This class is thread safe.
 *
 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
 */
public class SecurityOutFaultInterceptor extends AbstractPhaseInterceptor<Message>
{
    public SecurityOutFaultInterceptor()
    {
        super( Phase.PRE_STREAM );

    }

    
    public void handleMessage( Message message ) throws Fault
    {
        Fault fault = (Fault) message.getContent( Exception.class );
        Throwable ex = fault.getCause();
        
        if ( !(ex instanceof SecurityException) )
        {
            throw new RuntimeException( "Security Exception is expected:" + ex );
        }

        HttpServletResponse response = (HttpServletResponse) message.getExchange().getInMessage()
            .get( AbstractHTTPDestination.HTTP_RESPONSE );
        int status = ex instanceof AccessDeniedException ? 403 : 401;
        response.setStatus( status );
        
        try
        {
            response.getOutputStream().write( ex.getMessage().getBytes() );
            response.getOutputStream().flush();
        }
        catch ( IOException iex )
        {
            // ignore
        }

        message.getInterceptorChain().abort();
    }
}