/**
* 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.hdfs.util;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hdfs.protocol.FSConstants;
import org.apache.hadoop.util.StringUtils;
/**
* Default implementation of PathNameChecker
*
* Checks that the the path does not contain ":" and "//"
* Path should not have relative elements ".", ".."
*/
public class DefaultPathNameChecker implements PathNameChecker {
@Override
public boolean isValidPath(String path) {
String[] components = StringUtils.split(path, Path.SEPARATOR_CHAR);
return isValidPath(path, components);
}
@Override
public boolean isValidPath(String path, String[] names) {
if (!defaultCheck(path, names)) {
return false;
}
for(String element : names) {
if (element.equals("..") ||
element.equals(".") ||
element.indexOf("\n") >= 0 ||
element.indexOf("\r") >= 0 ||
element.indexOf("\t") >= 0 ||
(element.indexOf(":") >= 0)) {
return false;
}
}
return true;
}
public static boolean defaultCheck(String path, String[] names) {
if (!path.startsWith(Path.SEPARATOR)
|| names.length > FSConstants.MAX_PATH_DEPTH
|| path.contains("//")) {
return false;
}
return true;
}
}