| /** |
| * 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.hdfsproxy; |
| |
| import java.io.IOException; |
| import java.net.InetSocketAddress; |
| import java.security.PrivilegedExceptionAction; |
| |
| import javax.servlet.ServletContext; |
| import javax.servlet.http.HttpServletRequest; |
| |
| import org.apache.hadoop.hdfs.DFSClient; |
| import org.apache.hadoop.hdfs.server.namenode.StreamFile; |
| import org.apache.hadoop.security.UserGroupInformation; |
| import org.apache.hadoop.conf.Configuration; |
| |
| /** {@inheritDoc} */ |
| public class ProxyStreamFile extends StreamFile { |
| /** For java.io.Serializable */ |
| private static final long serialVersionUID = 1L; |
| |
| /** {@inheritDoc} */ |
| @Override |
| protected DFSClient getDFSClient(HttpServletRequest request) |
| throws IOException, InterruptedException { |
| ServletContext context = getServletContext(); |
| final Configuration conf = |
| (Configuration) context.getAttribute("name.conf"); |
| final InetSocketAddress nameNodeAddr = |
| (InetSocketAddress) context.getAttribute("name.node.address"); |
| |
| DFSClient client = getUGI(request, conf).doAs |
| ( new PrivilegedExceptionAction<DFSClient>() { |
| @Override |
| public DFSClient run() throws IOException { |
| return new DFSClient(nameNodeAddr, conf); |
| } |
| }); |
| |
| return client; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| protected UserGroupInformation getUGI(HttpServletRequest request, |
| Configuration conf) { |
| String userID = (String) request |
| .getAttribute("org.apache.hadoop.hdfsproxy.authorized.userID"); |
| return ProxyUtil.getProxyUGIFor(userID); |
| } |
| |
| } |