/*
 * ====================================================================
 * 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.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 *
 */
package org.apache.http.conn.util;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URL;
import java.util.Arrays;
import java.util.List;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.http.Consts;
import org.apache.http.annotation.Contract;
import org.apache.http.annotation.ThreadingBehavior;
import org.apache.http.util.Args;

Since:4.4
/** * {@link org.apache.http.conn.util.PublicSuffixMatcher} loader. * * @since 4.4 */
@Contract(threading = ThreadingBehavior.SAFE) public final class PublicSuffixMatcherLoader { private static PublicSuffixMatcher load(final InputStream in) throws IOException { final List<PublicSuffixList> lists = new PublicSuffixListParser().parseByType( new InputStreamReader(in, Consts.UTF_8)); return new PublicSuffixMatcher(lists); } public static PublicSuffixMatcher load(final URL url) throws IOException { Args.notNull(url, "URL"); final InputStream in = url.openStream(); try { return load(in); } finally { in.close(); } } public static PublicSuffixMatcher load(final File file) throws IOException { Args.notNull(file, "File"); final InputStream in = new FileInputStream(file); try { return load(in); } finally { in.close(); } } private static volatile PublicSuffixMatcher DEFAULT_INSTANCE; public static PublicSuffixMatcher getDefault() { if (DEFAULT_INSTANCE == null) { synchronized (PublicSuffixMatcherLoader.class) { if (DEFAULT_INSTANCE == null){ final URL url = PublicSuffixMatcherLoader.class.getResource( "/mozilla/public-suffix-list.txt"); if (url != null) { try { DEFAULT_INSTANCE = load(url); } catch (final IOException ex) { // Should never happen final Log log = LogFactory.getLog(PublicSuffixMatcherLoader.class); if (log.isWarnEnabled()) { log.warn("Failure loading public suffix list from default resource", ex); } } } else { DEFAULT_INSTANCE = new PublicSuffixMatcher(DomainType.ICANN, Arrays.asList("com"), null); } } } } return DEFAULT_INSTANCE; } }