| /* |
| * 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.sling.api.request; |
| |
| import java.io.IOException; |
| import java.io.Writer; |
| |
| import org.jetbrains.annotations.NotNull; |
| |
| /** |
| * Response related utility methods |
| * <p> |
| * This class is not intended to be extended or instantiated because it just |
| * provides static utility methods not intended to be overwritten. |
| * |
| * @since 2.1 (Sling API Bundle 2.1.0) |
| */ |
| public class ResponseUtil { |
| |
| private static class XmlEscapingWriter extends Writer { |
| private final Writer target; |
| |
| XmlEscapingWriter(Writer target) { |
| this.target = target; |
| } |
| |
| @Override |
| public void close() throws IOException { |
| target.close(); |
| } |
| |
| @Override |
| public void flush() throws IOException { |
| target.flush(); |
| } |
| |
| @Override |
| public void write(char[] buffer, int offset, int length) throws IOException { |
| for(int i = offset; i < offset + length; i++) { |
| write(buffer[i]); |
| } |
| } |
| |
| @Override |
| public void write(char[] cbuf) throws IOException { |
| write(cbuf, 0, cbuf.length); |
| } |
| |
| @Override |
| public void write(int c) throws IOException { |
| if(c == '&') { |
| target.write("&"); |
| } else if(c == '<') { |
| target.write("<"); |
| } else if(c == '>') { |
| target.write(">"); |
| } else if(c == '"') { |
| target.write("""); |
| } else if(c == '\'') { |
| target.write("'"); |
| } else { |
| target.write(c); |
| } |
| } |
| |
| @Override |
| public void write(String str, int off, int len) throws IOException { |
| write(str.toCharArray(), off, len); |
| } |
| |
| @Override |
| public void write(String str) throws IOException { |
| write(str.toCharArray()); |
| } |
| } |
| |
| /** |
| * Escape XML text |
| * @param input The input text |
| * @return The escaped text |
| */ |
| public static String escapeXml(final String input) { |
| if (input == null) { |
| return null; |
| } |
| |
| final StringBuilder b = new StringBuilder(input.length()); |
| for(int i = 0;i < input.length(); i++) { |
| final char c = input.charAt(i); |
| if(c == '&') { |
| b.append("&"); |
| } else if(c == '<') { |
| b.append("<"); |
| } else if(c == '>') { |
| b.append(">"); |
| } else if(c == '"') { |
| b.append("""); |
| } else if(c == '\'') { |
| b.append("'"); |
| } else { |
| b.append(c); |
| } |
| } |
| return b.toString(); |
| } |
| |
| /** |
| * Return a Writer that writes escaped XML text to target |
| * @param target writer |
| * @return Wrapped writer escaping XML |
| */ |
| public static @NotNull Writer getXmlEscapingWriter(@NotNull Writer target) { |
| return new XmlEscapingWriter(target); |
| } |
| } |