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/*
 * Copyright (c) 2002-2016 "Neo Technology,"
 * Network Engine for Objects in Lund AB [http://neotechnology.com]
 *
 * This file is part of Neo4j.
 *
 * Neo4j 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 .
 */
package org.neo4j.server.rest.security;

import javax.ws.rs.core.Response;
import javax.ws.rs.core.Response.Status;
import javax.ws.rs.ext.ExceptionMapper;
import javax.ws.rs.ext.Provider;

/**
 * 
 * Map an authentication exception to an HTTP 401 response, optionally including
 * the realm for a credentials challenge at the client.
 * 
 */
@Provider
public class AuthenticationExceptionMapper implements ExceptionMapper
{

    public Response toResponse( AuthenticationException e )
    {
        if ( e.getRealm() != null )
        {
            return Response.status( Status.UNAUTHORIZED )
                    .header( "WWW-Authenticate", "Basic realm=\"" + e.getRealm() + "\"" )
                    .type( "text/plain" )
                    .entity( e.getMessage() )
                    .build();
        }
        else
        {
            return Response.status( Status.UNAUTHORIZED )
                    .type( "text/plain" )
                    .entity( e.getMessage() )
                    .build();
        }
    }

}