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; 023 024import javax.servlet.Filter; 025import javax.servlet.FilterChain; 026import javax.servlet.FilterConfig; 027import javax.servlet.ServletException; 028import javax.servlet.ServletRequest; 029import javax.servlet.ServletResponse; 030import javax.servlet.http.HttpServletResponse; 031 032import org.apache.hadoop.conf.Configuration; 033import org.apache.hadoop.hbase.HBaseInterfaceAudience; 034import org.apache.yetus.audience.InterfaceAudience; 035 036@InterfaceAudience.LimitedPrivate(HBaseInterfaceAudience.CONFIG) 037public class ClickjackingPreventionFilter implements Filter { 038 private FilterConfig filterConfig; 039 private static final String DEFAULT_XFRAMEOPTIONS = "DENY"; 040 041 @Override 042 public void init(FilterConfig filterConfig) throws ServletException { 043 this.filterConfig = filterConfig; 044 } 045 046 @Override 047 public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) 048 throws IOException, ServletException { 049 HttpServletResponse httpRes = (HttpServletResponse) res; 050 httpRes.addHeader("X-Frame-Options", filterConfig.getInitParameter("xframeoptions")); 051 chain.doFilter(req, res); 052 } 053 054 @Override 055 public void destroy() { 056 } 057 058 public static Map<String, String> getDefaultParameters(Configuration conf) { 059 Map<String, String> params = new HashMap<>(); 060 params.put("xframeoptions", conf.get("hbase.http.filter.xframeoptions.mode", 061 DEFAULT_XFRAMEOPTIONS)); 062 return params; 063 } 064}