| /** |
| * 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.util; |
| |
| import java.io.BufferedReader; |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.IOException; |
| import java.io.InputStreamReader; |
| import java.io.Reader; |
| import java.nio.charset.StandardCharsets; |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.HashSet; |
| import java.util.List; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| |
| /** |
| * FileBasedIPList loads a list of subnets in CIDR format and ip addresses from |
| * a file. |
| * |
| * Given an ip address, isIn method returns true if ip belongs to one of the |
| * subnets. |
| * |
| * Thread safe. |
| */ |
| public class FileBasedIPList implements IPList { |
| |
| private static final Log LOG = LogFactory.getLog(FileBasedIPList.class); |
| |
| private final String fileName; |
| private final MachineList addressList; |
| |
| public FileBasedIPList(String fileName) { |
| this.fileName = fileName; |
| String[] lines; |
| try { |
| lines = readLines(fileName); |
| } catch (IOException e) { |
| lines = null; |
| } |
| if (lines != null) { |
| addressList = new MachineList(new HashSet<String>(Arrays.asList(lines))); |
| } else { |
| addressList = null; |
| } |
| } |
| |
| public FileBasedIPList reload() { |
| return new FileBasedIPList(fileName); |
| } |
| |
| @Override |
| public boolean isIn(String ipAddress) { |
| if (ipAddress == null || addressList == null) { |
| return false; |
| } |
| return addressList.includes(ipAddress); |
| } |
| |
| /** |
| * Reads the lines in a file. |
| * @param fileName |
| * @return lines in a String array; null if the file does not exist or if the |
| * file name is null |
| * @throws IOException |
| */ |
| private static String[] readLines(String fileName) throws IOException { |
| try { |
| if (fileName != null) { |
| File file = new File (fileName); |
| if (file.exists()) { |
| try ( |
| Reader fileReader = new InputStreamReader( |
| new FileInputStream(file), StandardCharsets.UTF_8); |
| BufferedReader bufferedReader = new BufferedReader(fileReader)) { |
| List<String> lines = new ArrayList<String>(); |
| String line = null; |
| while ((line = bufferedReader.readLine()) != null) { |
| lines.add(line); |
| } |
| if (LOG.isDebugEnabled()) { |
| LOG.debug("Loaded IP list of size = " + lines.size() + |
| " from file = " + fileName); |
| } |
| return (lines.toArray(new String[lines.size()])); |
| } |
| } else { |
| LOG.debug("Missing ip list file : "+ fileName); |
| } |
| } |
| } catch (IOException ioe) { |
| LOG.error(ioe); |
| throw ioe; |
| } |
| return null; |
| } |
| } |