| /** |
| * 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.security.authorize; |
| |
| import java.net.InetSocketAddress; |
| import java.util.Collection; |
| import java.util.HashSet; |
| |
| import org.apache.hadoop.conf.Configuration; |
| |
| public class ProxyServers { |
| public static final String CONF_HADOOP_PROXYSERVERS = "hadoop.proxyservers"; |
| private static volatile Collection<String> proxyServers; |
| |
| public static void refresh() { |
| refresh(new Configuration()); |
| } |
| |
| public static void refresh(Configuration conf){ |
| Collection<String> tempServers = new HashSet<String>(); |
| // trusted proxy servers such as http proxies |
| for (String host : conf.getTrimmedStrings(CONF_HADOOP_PROXYSERVERS)) { |
| InetSocketAddress addr = new InetSocketAddress(host, 0); |
| if (!addr.isUnresolved()) { |
| tempServers.add(addr.getAddress().getHostAddress()); |
| } |
| } |
| proxyServers = tempServers; |
| } |
| |
| public static boolean isProxyServer(String remoteAddr) { |
| if (proxyServers == null) { |
| refresh(); |
| } |
| return proxyServers.contains(remoteAddr); |
| } |
| } |