| /* |
| * 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.catalina.util; |
| |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| import java.io.OutputStreamWriter; |
| import java.util.BitSet; |
| |
| /** |
| * |
| * This class is very similar to the java.net.URLEncoder class. |
| * |
| * Unfortunately, with java.net.URLEncoder there is no way to specify to the |
| * java.net.URLEncoder which characters should NOT be encoded. |
| * |
| * This code was moved from DefaultServlet.java |
| * |
| * @author Craig R. McClanahan |
| * @author Remy Maucherat |
| */ |
| public class URLEncoder { |
| private static final char[] hexadecimal = |
| {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', |
| 'A', 'B', 'C', 'D', 'E', 'F'}; |
| |
| //Array containing the safe characters set. |
| protected final BitSet safeCharacters = new BitSet(256); |
| |
| public URLEncoder() { |
| for (char i = 'a'; i <= 'z'; i++) { |
| addSafeCharacter(i); |
| } |
| for (char i = 'A'; i <= 'Z'; i++) { |
| addSafeCharacter(i); |
| } |
| for (char i = '0'; i <= '9'; i++) { |
| addSafeCharacter(i); |
| } |
| } |
| |
| public void addSafeCharacter( char c ) { |
| safeCharacters.set( c ); |
| } |
| |
| public String encode( String path ) { |
| int maxBytesPerChar = 10; |
| StringBuilder rewrittenPath = new StringBuilder(path.length()); |
| ByteArrayOutputStream buf = new ByteArrayOutputStream(maxBytesPerChar); |
| OutputStreamWriter writer = null; |
| try { |
| writer = new OutputStreamWriter(buf, "UTF8"); |
| } catch (Exception e) { |
| e.printStackTrace(); |
| writer = new OutputStreamWriter(buf); |
| } |
| |
| for (int i = 0; i < path.length(); i++) { |
| int c = path.charAt(i); |
| if (safeCharacters.get(c)) { |
| rewrittenPath.append((char)c); |
| } else { |
| // convert to external encoding before hex conversion |
| try { |
| writer.write((char)c); |
| writer.flush(); |
| } catch(IOException e) { |
| buf.reset(); |
| continue; |
| } |
| byte[] ba = buf.toByteArray(); |
| for (int j = 0; j < ba.length; j++) { |
| // Converting each byte in the buffer |
| byte toEncode = ba[j]; |
| rewrittenPath.append('%'); |
| int low = toEncode & 0x0f; |
| int high = (toEncode & 0xf0) >> 4; |
| rewrittenPath.append(hexadecimal[high]); |
| rewrittenPath.append(hexadecimal[low]); |
| } |
| buf.reset(); |
| } |
| } |
| return rewrittenPath.toString(); |
| } |
| } |