/*
* Copyright 1999-2017 Alibaba Group Holding Ltd.
*
* 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.
*/
package com.alibaba.druid.util;
public class ServletPathMatcher implements PatternMatcher {
private final static ServletPathMatcher INSTANCE = new ServletPathMatcher();
public static ServletPathMatcher getInstance() {
return INSTANCE;
}
/**
* <p>
* three type: endsWithMatch(eg. /xxx*=/xxx/xyz), startsWithMatch(eg.
* *.xxx=abc.xxx), equals(eg. /xxx=/xxx).
* </p>
* <b>Notice</b>: *xxx* will match *xxxyyyy. endsWithMatch first.
*/
@Override
public boolean matches(String pattern, String source) {
if (pattern == null || source == null) {
return false;
}
pattern = pattern.trim();
source = source.trim();
if (pattern.endsWith("*")) {
// pattern: /druid* source:/druid/index.html
int length = pattern.length() - 1;
if (source.length() >= length) {
if (pattern.substring(0, length).equals(
source.substring(0, length))) {
return true;
}
}
} else if (pattern.startsWith("*")) {
// pattern: *.html source:/xx/xx.html
int length = pattern.length() - 1;
if (source.length() >= length
&& source.endsWith(pattern.substring(1))) {
return true;
}
} else if (pattern.contains("*")) {
// pattern: /druid/*/index.html source:/druid/admin/index.html
int start = pattern.indexOf("*");
int end = pattern.lastIndexOf("*");
if (source.startsWith(pattern.substring(0, start))
&& source.endsWith(pattern.substring(end + 1))) {
return true;
}
} else {
// pattern: /druid/index.html source:/druid/index.html
if (pattern.equals(source)) {
return true;
}
}
return false;
}
}