| /* |
| * Copyright (c) 1999, 2012, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package com.sun.jndi.toolkit.url; |
| |
| import java.net.MalformedURLException; |
| import java.io.UnsupportedEncodingException; |
| import java.net.URLDecoder; |
| |
| /** |
| * Utilities for dealing with URLs. |
| * @author Vincent Ryan |
| */ |
| |
| final public class UrlUtil { |
| |
| // To prevent creation of this static class |
| private UrlUtil() { |
| } |
| |
| /** |
| * Decode a URI string (according to RFC 2396). |
| */ |
| public static final String decode(String s) throws MalformedURLException { |
| try { |
| return decode(s, "8859_1"); |
| } catch (UnsupportedEncodingException e) { |
| // ISO-Latin-1 should always be available? |
| throw new MalformedURLException("ISO-Latin-1 decoder unavailable"); |
| } |
| } |
| |
| /** |
| * Decode a URI string (according to RFC 2396). |
| * |
| * Three-character sequences '%xy', where 'xy' is the two-digit |
| * hexadecimal representation of the lower 8-bits of a character, |
| * are decoded into the character itself. |
| * |
| * The string is subsequently converted using the specified encoding |
| */ |
| public static final String decode(String s, String enc) |
| throws MalformedURLException, UnsupportedEncodingException { |
| try { |
| return URLDecoder.decode(s, enc); |
| } catch (IllegalArgumentException iae) { |
| MalformedURLException mue = new MalformedURLException("Invalid URI encoding: " + s); |
| mue.initCause(iae); |
| throw mue; |
| } |
| } |
| |
| /** |
| * Encode a string for inclusion in a URI (according to RFC 2396). |
| * |
| * Unsafe characters are escaped by encoding them in three-character |
| * sequences '%xy', where 'xy' is the two-digit hexadecimal representation |
| * of the lower 8-bits of the character. |
| * |
| * The question mark '?' character is also escaped, as required by RFC 2255. |
| * |
| * The string is first converted to the specified encoding. |
| * For LDAP (2255), the encoding must be UTF-8. |
| */ |
| public static final String encode(String s, String enc) |
| throws UnsupportedEncodingException { |
| |
| byte[] bytes = s.getBytes(enc); |
| int count = bytes.length; |
| |
| /* |
| * From RFC 2396: |
| * |
| * mark = "-" | "_" | "." | "!" | "~" | "*" | "'" | "(" | ")" |
| * reserved = ";" | "/" | ":" | "?" | "@" | "&" | "=" | "+" | "$" | "," |
| */ |
| final String allowed = "=,+;.'-@&/$_()!~*:"; // '?' is omitted |
| char[] buf = new char[3 * count]; |
| int j = 0; |
| |
| for (int i = 0; i < count; i++) { |
| if ((bytes[i] >= 0x61 && bytes[i] <= 0x7A) || // a..z |
| (bytes[i] >= 0x41 && bytes[i] <= 0x5A) || // A..Z |
| (bytes[i] >= 0x30 && bytes[i] <= 0x39) || // 0..9 |
| (allowed.indexOf(bytes[i]) >= 0)) { |
| buf[j++] = (char) bytes[i]; |
| } else { |
| buf[j++] = '%'; |
| buf[j++] = Character.forDigit(0xF & (bytes[i] >>> 4), 16); |
| buf[j++] = Character.forDigit(0xF & bytes[i], 16); |
| } |
| } |
| return new String(buf, 0, j); |
| } |
| } |