| /* |
| * 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.knox.gateway.util; |
| |
| import java.io.UnsupportedEncodingException; |
| import java.net.MalformedURLException; |
| import java.net.URL; |
| import java.net.URLDecoder; |
| import java.nio.charset.StandardCharsets; |
| import java.util.regex.Matcher; |
| import java.util.regex.Pattern; |
| |
| public class RegExUtils { |
| /** |
| * Checks for a match of a given string against |
| * a whitelist of semi-colon separated regex patterns. |
| * @param whitelist - semi-colon separated patterns |
| * @param tomatch - the string to match against list |
| * @return true for a match otherwise false |
| */ |
| public static boolean checkWhitelist(String whitelist, String tomatch) { |
| String[] patterns = whitelist.split(";"); |
| for (String patternString : patterns) { |
| Pattern pattern = Pattern.compile(patternString); |
| Matcher matcher = pattern.matcher(tomatch); |
| if (matcher.matches()) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| public static boolean checkBaseUrlAgainstWhitelist(String whitelist, String fullUrl) { |
| String decodedURL = fullUrl; |
| try { |
| decodedURL = URLDecoder.decode(fullUrl, StandardCharsets.UTF_8.name()); |
| } catch (UnsupportedEncodingException e) { |
| // |
| } |
| String baseUrl; |
| try { |
| URL url = new URL(decodedURL); |
| baseUrl = new URL(url.getProtocol(), url.getHost(), url.getPort(), "").toString(); |
| } catch (MalformedURLException e) { |
| throw new RuntimeException(e); |
| } |
| return checkWhitelist(whitelist, baseUrl); |
| } |
| |
| } |