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/*-
* ============LICENSE_START=======================================================
* Copyright (C) 2019 Nordix Foundation.
* ================================================================================
* Licensed 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.
*
* SPDX-License-Identifier: Apache-2.0
* ============LICENSE_END=========================================================
*/
package org.onap.dmaap.datarouter.node;
/**
* FORTIFY SCAN FIXES.
* <p>This Utility is used for Fortify fixes. It Validates the path url formed from
* the string passed in the request parameters.</p>
*/
class PathUtil {
private PathUtil() {
throw new IllegalStateException("Utility Class");
}
/**
* This method takes String as the parameter and return the filtered path string.
*
* @param string String to clean
* @return A cleaned String
*/
static String cleanString(String string) {
if (string == null) {
return null;
}
StringBuilder cleanString = new StringBuilder();
for (int i = 0; i < string.length(); ++i) {
cleanString.append(cleanChar(string.charAt(i)));
}
return cleanString.toString();
}
/**
* This method filters the valid special characters in path string.
*
* @param character The char to be cleaned
* @return The cleaned char
*/
private static char cleanChar(char character) {
// 0 - 9
for (int i = 48; i < 58; ++i) {
if (character == i) {
return (char) i;
}
}
// 'A' - 'Z'
for (int i = 65; i < 91; ++i) {
if (character == i) {
return (char) i;
}
}
// 'a' - 'z'
for (int i = 97; i < 123; ++i) {
if (character == i) {
return (char) i;
}
}
return getValidCharacter(character);
}
private static char getValidCharacter(char character) {
// other valid characters
switch (character) {
case '/':
return '/';
case '.':
return '.';
case '-':
return '-';
case ':':
return ':';
case '?':
return '?';
case '&':
return '&';
case '=':
return '=';
case '#':
return '#';
case '_':
return '_';
case ' ':
return ' ';
default:
return '%';
}
}
}
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