001 /* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache license, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the license for the specific language governing permissions and 015 * limitations under the license. 016 */ 017 package org.apache.logging.log4j.core.helpers; 018 019 import org.apache.logging.log4j.Logger; 020 import org.apache.logging.log4j.status.StatusLogger; 021 022 import java.io.File; 023 import java.io.UnsupportedEncodingException; 024 import java.net.MalformedURLException; 025 import java.net.URI; 026 import java.net.URL; 027 import java.net.URLDecoder; 028 029 /** 030 * File utilities. 031 */ 032 public final class FileUtils { 033 034 /** Constant for the file URL protocol.*/ 035 private static final String PROTOCOL_FILE = "file"; 036 037 private static final String JBOSS_FILE = "vfsfile"; 038 039 private static final Logger logger = StatusLogger.getLogger(); 040 041 private FileUtils() { 042 } 043 044 /** 045 * Tries to convert the specified URL to a file object. If this fails, 046 * <b>null</b> is returned. 047 * 048 * @param uri the URI 049 * @return the resulting file object 050 */ 051 public static File fileFromURI(URI uri) { 052 if (uri == null || (uri.getScheme() != null && 053 (!PROTOCOL_FILE.equals(uri.getScheme()) && !JBOSS_FILE.equals(uri.getScheme())))) { 054 return null; 055 } else { 056 if (uri.getScheme() == null) { 057 try { 058 uri = new File(uri.getPath()).toURI(); 059 } catch (Exception ex) { 060 logger.warn("Invalid URI " + uri); 061 return null; 062 } 063 } 064 try { 065 return new File(URLDecoder.decode(uri.toURL().getFile(), "UTF8")); 066 } catch (MalformedURLException ex) { 067 logger.warn("Invalid URL " + uri, ex); 068 } catch (UnsupportedEncodingException uee) { 069 logger.warn("Invalid encoding: UTF8", uee); 070 } 071 return null; 072 } 073 } 074 075 public static boolean isFile(URL url) { 076 return url != null && (url.getProtocol().equals(PROTOCOL_FILE) || url.getProtocol().equals(JBOSS_FILE)); 077 } 078 }