001/**
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.hadoop.hbase.http;
019
020import javax.servlet.Filter;
021import javax.servlet.FilterChain;
022import javax.servlet.FilterConfig;
023import javax.servlet.ServletException;
024import javax.servlet.ServletRequest;
025import javax.servlet.ServletResponse;
026import javax.servlet.http.HttpServletResponse;
027import java.io.IOException;
028
029import org.apache.yetus.audience.InterfaceAudience;
030import org.apache.hadoop.hbase.HBaseInterfaceAudience;
031
032@InterfaceAudience.LimitedPrivate(HBaseInterfaceAudience.CONFIG)
033public class ClickjackingPreventionFilter implements Filter {
034
035    private FilterConfig filterConfig;
036
037    @Override
038    public void init(FilterConfig filterConfig) throws ServletException {
039        this.filterConfig = filterConfig;
040    }
041
042    @Override
043    public void doFilter(ServletRequest req, ServletResponse res,
044                         FilterChain chain)
045            throws IOException, ServletException {
046        HttpServletResponse httpRes = (HttpServletResponse) res;
047        httpRes.addHeader("X-Frame-Options", filterConfig.getInitParameter("xframeoptions"));
048        chain.doFilter(req, res);
049    }
050
051    @Override
052    public void destroy() {
053    }
054
055}