HTMLFilter.java
上传用户:bj_pst
上传日期:2019-07-07
资源大小:7353k
文件大小:2k
- /*
- * 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 util;
- /**
- * HTML filter utility.
- *
- * @author Craig R. McClanahan
- * @author Tim Tye
- * @version $Revision: 466607 $ $Date: 2006-10-21 17:09:50 -0600 (Sat, 21 Oct 2006) $
- */
- public final class HTMLFilter {
- /**
- * Filter the specified message string for characters that are sensitive
- * in HTML. This avoids potential attacks caused by including JavaScript
- * codes in the request URL that is often reported in error messages.
- *
- * @param message The message string to be filtered
- */
- public static String filter(String message) {
- if (message == null)
- return (null);
- char content[] = new char[message.length()];
- message.getChars(0, message.length(), content, 0);
- StringBuffer result = new StringBuffer(content.length + 50);
- for (int i = 0; i < content.length; i++) {
- switch (content[i]) {
- case '<':
- result.append("<");
- break;
- case '>':
- result.append(">");
- break;
- case '&':
- result.append("&");
- break;
- case '"':
- result.append(""");
- break;
- default:
- result.append(content[i]);
- }
- }
- return (result.toString());
- }
- }