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 java.io.IOException; 021import java.util.HashMap; 022import java.util.Map; 023import javax.servlet.Filter; 024import javax.servlet.FilterChain; 025import javax.servlet.FilterConfig; 026import javax.servlet.ServletException; 027import javax.servlet.ServletRequest; 028import javax.servlet.ServletResponse; 029import javax.servlet.http.HttpServletResponse; 030import org.apache.hadoop.conf.Configuration; 031import org.apache.hadoop.hbase.HBaseInterfaceAudience; 032import org.apache.yetus.audience.InterfaceAudience; 033 034@InterfaceAudience.LimitedPrivate(HBaseInterfaceAudience.CONFIG) 035public class ClickjackingPreventionFilter implements Filter { 036 private FilterConfig filterConfig; 037 private static final String DEFAULT_XFRAMEOPTIONS = "DENY"; 038 039 @Override 040 public void init(FilterConfig filterConfig) throws ServletException { 041 this.filterConfig = filterConfig; 042 } 043 044 @Override 045 public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) 046 throws IOException, ServletException { 047 HttpServletResponse httpRes = (HttpServletResponse) res; 048 httpRes.addHeader("X-Frame-Options", filterConfig.getInitParameter("xframeoptions")); 049 chain.doFilter(req, res); 050 } 051 052 @Override 053 public void destroy() { 054 } 055 056 public static Map<String, String> getDefaultParameters(Configuration conf) { 057 Map<String, String> params = new HashMap<>(); 058 params.put("xframeoptions", 059 conf.get("hbase.http.filter.xframeoptions.mode", DEFAULT_XFRAMEOPTIONS)); 060 return params; 061 } 062}