| /** |
| * 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.camel.component.file.remote; |
| |
| import java.io.File; |
| import java.util.Iterator; |
| import java.util.Stack; |
| |
| import org.apache.camel.util.FileUtil; |
| |
| /** |
| * Various FTP utils. |
| */ |
| public final class FtpUtils { |
| |
| private FtpUtils() { |
| } |
| |
| /** |
| * Compacts a path by stacking it and reducing <tt>..</tt>, |
| * and uses OS specific file separators (eg {@link java.io.File#separator}). |
| * <p/> |
| * <b>Important: </b> This implementation works for the camel-ftp component |
| * for various FTP clients and FTP servers using different platforms and whatnot. |
| * This implementation has been working for many Camel releases, and is included here |
| * to restore patch compatibility with the Camel releases. |
| */ |
| public static String compactPath(String path) { |
| if (path == null) { |
| return null; |
| } |
| |
| // only normalize if contains a path separator |
| if (path.indexOf(File.separator) == -1) { |
| return path; |
| } |
| |
| // preserve ending slash if given in input path |
| boolean endsWithSlash = path.endsWith("/") || path.endsWith("\\"); |
| |
| // preserve starting slash if given in input path |
| boolean startsWithSlash = path.startsWith("/") || path.startsWith("\\"); |
| |
| Stack<String> stack = new Stack<String>(); |
| |
| String separatorRegex = File.separator; |
| if (FileUtil.isWindows()) { |
| separatorRegex = "\\\\"; |
| } |
| String[] parts = path.split(separatorRegex); |
| for (String part : parts) { |
| if (part.equals("..") && !stack.isEmpty() && !"..".equals(stack.peek())) { |
| // only pop if there is a previous path, which is not a ".." path either |
| stack.pop(); |
| } else if (part.equals(".") || part.isEmpty()) { |
| // do nothing because we don't want a path like foo/./bar or foo//bar |
| } else { |
| stack.push(part); |
| } |
| } |
| |
| // build path based on stack |
| StringBuilder sb = new StringBuilder(); |
| |
| if (startsWithSlash) { |
| sb.append(File.separator); |
| } |
| |
| for (Iterator<String> it = stack.iterator(); it.hasNext();) { |
| sb.append(it.next()); |
| if (it.hasNext()) { |
| sb.append(File.separator); |
| } |
| } |
| |
| if (endsWithSlash) { |
| sb.append(File.separator); |
| } |
| |
| // there has been problems with double slashes, |
| // so avoid this by removing any 2nd slash |
| if (sb.length() >= 2) { |
| boolean firstSlash = sb.charAt(0) == '/' || sb.charAt(0) == '\\'; |
| boolean secondSlash = sb.charAt(1) == '/' || sb.charAt(1) == '\\'; |
| if (firstSlash && secondSlash) { |
| // remove 2nd clash |
| sb = sb.replace(1, 2, ""); |
| } |
| } |
| |
| return sb.toString(); |
| } |
| |
| } |