| /** |
| * 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.hadoop.hdfs.web; |
| |
| import java.io.IOException; |
| |
| import javax.servlet.FilterChain; |
| import javax.servlet.ServletException; |
| import javax.servlet.ServletRequest; |
| import javax.servlet.ServletResponse; |
| import javax.servlet.http.HttpServletRequest; |
| |
| import org.apache.hadoop.hdfs.web.resources.DelegationParam; |
| import org.apache.hadoop.security.authentication.server.AuthenticationFilter; |
| import org.apache.hadoop.security.authentication.server.ProxyUserAuthenticationFilter; |
| |
| /** |
| * Subclass of {@link AuthenticationFilter} that |
| * obtains Hadoop-Auth configuration for webhdfs. |
| */ |
| public class AuthFilter extends ProxyUserAuthenticationFilter { |
| |
| @Override |
| public void doFilter(ServletRequest request, ServletResponse response, |
| FilterChain filterChain) throws IOException, ServletException { |
| final HttpServletRequest httpRequest = ProxyUserAuthenticationFilter. |
| toLowerCase((HttpServletRequest)request); |
| final String tokenString = httpRequest.getParameter(DelegationParam.NAME); |
| if (tokenString != null && httpRequest.getServletPath().startsWith( |
| WebHdfsFileSystem.PATH_PREFIX)) { |
| //Token is present in the url, therefore token will be used for |
| //authentication, bypass kerberos authentication. |
| filterChain.doFilter(httpRequest, response); |
| return; |
| } |
| super.doFilter(request, response, filterChain); |
| } |
| |
| } |